STARGO ====== Assembly listing generated by TurboMASM from the modified Acorn source. Source: https://www.4corn.co.uk/articles/65hostandmos/ Source: http://regregex.bbcmicro.net/#prog.os126 Source: https://github.com/regregex/OS126 Branch slack calculated by Greg Cook with slack.pl (attached), 8 July 2025 Columns, left to right: (1) Filename, (2) line number and (3) hex address of limiting branch instruction (4) Direction of limiting branch: ^=backwards, v=forwards, Space=N/A (5) Hex number of bytes that may be inserted at this address, or between the branch instruction and the target SYMBOL at this address (NB: a more generous limit than shown may apply on the far side of the symbol.) --=no limit. (6) Current source filename, (7) line of assembly listing which typically starts with source line number, hex address and optional hex equate. *emulateturbo Acorn 6502 Tube 6502 Emulator OS 0.64 (19 Oct 1988) HIBASIC >*turmasm TURBOMASM Acorn Macro assembler 1.15 Action : width 127 Action : length 127 Action : stop on Action : print on Action : asm SgoHdr SgoHdr SgoHdr Macro library : SgoHdr SgoHdr SgoHdr SgoHdr Acorn macro assembler Page 1 SgoHdr SgoHdr SgoHdr Pass 1 SgoHdr Pass 2 -- SgoHdr 0001 0000 ; > SgoHdr -- SgoHdr 0002 0000 -- SgoHdr 0003 0000 GBLL $Tutu -- SgoHdr 0004 0000 $Tutu SETL 1=0 -- SgoHdr 0005 0000 -- SgoHdr 0006 0000 ; conditional assembly flags -- SgoHdr 0007 0000 007F MOS125 * &7F -- SgoHdr 0008 0000 0000 STARGO * &00 -- SgoHdr 0009 0000 00FF NOSP * &FF -- SgoHdr 0010 0000 ; ($00 => TRUE, $FF => FALSE) -- SgoHdr 0011 0000 -- SgoHdr 0012 0000 ; special labels for STARGO -- SgoHdr 0013 0000 00DC SEAL * &DC -- SgoHdr 0014 0000 ;The value to be returned in A by OSARGS A=1, Y=0 -- SgoHdr 0015 0000 ;when trapped by MOS/CFS/RFS. -- SgoHdr 0016 0000 ;MSRM says to preserve A (p. H.3-5), i.e. A=1 -- SgoHdr 0017 0000 ;however MOS 3.20 breaks the spec and returns A=&DC, mainly. -- SgoHdr 0018 0000 ;This is just a copy of the 3MSB of the pointer at X+1. -- SgoHdr 0019 0000 ;NAUG says A is undefined (p.253); other unofficial sources -- SgoHdr 0020 0000 ;suggest that implemented OSARGS calls *should not* -- SgoHdr 0021 0000 ;preserve A. -- SgoHdr 0022 0000 -- SgoHdr 0023 0000 02D0 TAILLO * &02D0 -- SgoHdr 0024 0000 02D1 TAILHI * &02D1 -- SgoHdr 0025 0000 ;Locations to store the command line tail pointer from *GO -- SgoHdr 0026 0000 ;and *RUN. Need not be adjacent. Formerly buffer activity -- SgoHdr 0027 0000 ;flags that are free in OS 1.26. -- SgoHdr 0028 0000 -- SgoHdr 0029 0000 LNK MOS00 -- MOS00 0001 0000 -- MOS00 0002 0000 TTL VDU File -> MOS00 -- MOS00 0003 0000 OPT &01 -- MOS00 0004 0000 -- MOS00 0005 0000 ; -- MOS00 0006 0000 ; MASM options -- MOS00 0007 0000 ; -- MOS00 0008 0000 0004 OPNEWP * &04 ;new page -- MOS00 0009 0000 0001 OPPON * &01 ;print on -- MOS00 0010 0000 0002 OPPOFF * &02 ;print off -- MOS00 0011 0000 ; -- MOS00 0012 0000 ; module print selections -- MOS00 0013 0000 ; -- MOS00 0014 0000 0005 DEFOPT * OPPON:OR:OPNEWP ;default option for MOS code -- MOS00 0015 0000 0005 MOS00 * DEFOPT -- MOS00 0016 0000 0005 MOS01 * DEFOPT -- MOS00 0017 0000 0005 MOS02 * DEFOPT -- MOS00 0018 0000 0005 MOS03 * DEFOPT -- MOS00 0019 0000 0005 MOS04 * DEFOPT -- MOS00 0020 0000 0005 MOS05 * DEFOPT -- MOS00 0021 0000 0005 MOS06 * DEFOPT -- MOS00 0022 0000 0005 MOS07 * DEFOPT -- MOS00 0023 0000 0005 MOS08 * DEFOPT -- MOS00 0024 0000 -- MOS00 0025 0000 0005 MOS10 * DEFOPT -- MOS00 0026 0000 0005 MOS11 * DEFOPT -- MOS00 0027 0000 -- MOS00 0028 0000 OPT MOS00 MOS00 MOS00 MOS00 MOS00 Acorn macro assembler Page 2 MOS00 VDU File -> MOS00 MOS00 -- MOS00 0029 0000 -- MOS00 0030 0000 00F0 WARGS * &00F0 -- MOS00 0031 0000 00FA SEIWKA * &00FA -- MOS00 0032 0000 00FB SEIWKB * &00FB -- MOS00 0033 0000 -- MOS00 0034 0000 ;Last updated 01/08/82 -- MOS00 0035 0000 -- MOS00 0036 0000 ;01/08/82 Intro of SEIWKA and SEIWKB to fix palette IRQ problem -- MOS00 0037 0000 ;01/05/82 Order of variables changed. Pseudo op # used. -- MOS00 0038 0000 ;21/04/82 QPOSN removed completely -- MOS00 0039 0000 ;25/03/82 Low byte of BEGSCN replaced with BYTCH (it was always zero) -- MOS00 0040 0000 ;04/02/82 QPOSN moved to MOS -- MOS00 0041 0000 ;07/01/82 VDUVEC removed (to $222 in MOS) -- MOS00 0042 0000 ;14/11/81 DOTS removed -- MOS00 0043 0000 -- MOS00 0044 0000 ;VARIABLES, NOT ZERO PAGE -- MOS00 0045 0000 -- MOS00 0046 0000 ;CHARACTER FONTS -- MOS00 0047 0000 -- MOS00 0048 0000 BF00 HFONT * &BF00 -- MOS00 0049 0000 00BF HFMSB * /(HFONT ) ;MSB of HFONT -- MOS00 0050 0000 -- MOS00 0051 0000 ;VARIABLES PROPER -- MOS00 0052 0000 -- MOS00 0053 0000 -- MOS00 0054 0000 0300 VARBLE * &0300 -- MOS00 0055 0000 0300 V * VARBLE ;An abbreviation -- MOS00 0056 0000 -- MOS00 0057 0000 -- MOS00 0058 0000 ^ VARBLE -- MOS00 0059 0000 -- MOS00 0060 0000 0300 GWLCOL # &02 ;Row no. of LH margin of graphics window (internal repn.) -- MOS00 0061 0000 0302 GWBROW # &02 ;Row no. of bottom margin of graphics window (internal repn.) -- MOS00 0062 0000 0304 GWRCOL # &02 ;Col no. of RH margin of graphics window (internal repn.) -- MOS00 0063 0000 0306 GWTROW # &02 ;Row no. of top margin of graphics window (internal repn.) -- MOS00 0064 0000 0308 TWLCOL # &01 ;Column number of left margin of text window -- MOS00 0065 0000 0309 TWBROW # &01 ;Row number of bottom margin of text window -- MOS00 0066 0000 030A TWRCOL # &01 ;Column number of right margin of text window -- MOS00 0067 0000 030B TWTROW # &01 ;Row number of top margin of text window -- MOS00 0068 0000 030C ORGX # &02 ;Screen origin (external represntation) -- MOS00 0069 0000 030E ORGY # &02 -- MOS00 0070 0000 0310 GCSX # &02 ;Graphics cursor (external representation) -- MOS00 0071 0000 0312 GCSY # &02 -- MOS00 0072 0000 0314 OLDCS # &04 ;Old graphics cursor -- MOS00 0073 0000 0318 CSX # &01 ;Text cursor posn (screen relative) -- MOS00 0074 0000 0319 CSY # &01 -- MOS00 0075 0000 031A YLINE # &01 ;Offset from ZMEMG for current graphics point -- MOS00 0076 0000 031B QQ # &08 ;Queue -- MOS00 0077 0000 0323 QEND # &01 ;Last byte in queue -- MOS00 0078 0000 0324 GCSIX # &02 ;Graphics cursor (internal representation) -- MOS00 0079 0000 0326 GCSIY # &02 -- MOS00 0080 0000 0328 VDUWS # &22 ;Workspace for VDU -- MOS00 0081 0000 034A CSPOSN # &02 ;Memory of top byte of character at cursor -- MOS00 0082 0000 034C PWWDTH # &02 ;Text window width in bytes -- MOS00 0083 0000 034E BEGSCN # &01 ;MSByte of Lowest byte address displayed -- MOS00 0084 0000 034F BYTCH # &01 ;No bytes per character displayed -- MOS00 0085 0000 0350 TOPSCN # &02 ;Address of top left byte on screen -- MOS00 0086 0000 0352 BYTROW # &02 ;Bytes per row -- MOS00 0087 0000 0354 BYTSCN # &01 ;Bytes used for screen display -- MOS00 0088 0000 0355 MODE # &01 ;Current VDU mode (0..7) -- MOS00 0089 0000 0356 MEMODE # &01 ;Memory map type (0..4) -- MOS00 0090 0000 ;STATS # $01 ;Individual bits used for various things - see docn. for details -- MOS00 0091 0000 0357 FTCOLF # &01 ;Next four must be in this order Foreground text colour -- MOS00 0092 0000 0358 BTCOLF # &01 ;Background text colour -- MOS00 0093 0000 0359 FGCOLF # &01 ;Foreground graphics colour -- MOS00 0094 0000 035A BGCOLF # &01 ;Background graphics colour -- MOS00 0095 0000 035B GPLFMD # &01 ;Current graphics foreground plot colour -- MOS00 0096 0000 035C GPLBMD # &01 ;Current graphics background plot colour -- MOS00 0097 0000 035D JVEC # &02 ;Jump vector for JMIs -- MOS00 0098 0000 035F CSTEMP # &01 ;Cursor start register of 6845 -- MOS00 0099 0000 0360 NCOLOR # &01 ;No. colours available (=0 for TTX) -- MOS00 0100 0000 0361 NPIX # &01 ;No. pixels per byte (=0 for non-graphics mode) -- MOS00 0101 0000 0362 MASKL # &01 ;Mask for left most pixel in byte -- MOS00 0102 0000 0363 MASKR # &01 ;Mask for right most pixel in byte -- MOS00 0103 0000 0364 PCSX # &01 ;Print cursor x position -- MOS00 0104 0000 0365 PCSY # &01 ;Print cursor y position -- MOS00 0105 0000 0366 CHCSR # &01 ;Character which is the displayed cursor on print line -- MOS00 0106 0000 0367 FNTFLG # &01 ;Default font flags, 0 for hard font, p.1=b6 .. p.7=b0 -- MOS00 0107 0000 0368 PGSFNT # &07 ;Page addresses for the soft font $20 - $3F & etc. -- MOS00 0108 0000 036F PARROT # &10 ;Storage of 16 physical colours -- MOS00 0109 0000 037F VEND # &00 ;End of the variables -- MOS00 0110 0000 -- MOS00 0111 0000 ; ************************** MANIFESTS **************************** -- MOS00 0112 0000 -- MOS00 0113 0000 -- MOS00 0114 0000 ^ VDUWS -- MOS00 0115 0000 0328 DLEWS # &08 ;Workspace for DLE -- MOS00 0116 0000 0330 DLENLN # &01 -- MOS00 0117 0000 -- MOS00 0118 0000 ^ VDUWS -- MOS00 0119 0000 0328 CANWS # &04 ;Workspace for CAN -- MOS00 0120 0000 032C CDELTA # &04 -- MOS00 0121 0000 -- MOS00 0122 0000 ^ VDUWS -- MOS00 0123 0000 0328 USWS # &02 ;Workspace for US -- MOS00 0124 0000 -- MOS00 0125 0000 ^ VDUWS -- MOS00 0126 0000 0328 SSWS # &02 ;Workspace for soft scrolling -- MOS00 0127 0000 -- MOS00 0128 0000 ^ VDUWS -- MOS00 0129 0000 0328 APCS1 # &04 ;Workspace for anomalous printing -- MOS00 0130 0000 -- MOS00 0131 0000 ^ VDUWS -- MOS00 0132 0000 0328 READWS # &08 ;Intermediate bit pattern formed during READCH -- MOS00 0133 0000 -- MOS00 0134 0000 ^ VDUWS -- MOS00 0135 0000 0328 RPXLWS # &04 ;Workspace for read pixel -- MOS00 0136 0000 -- MOS00 0137 0000 ;For graphics in general -- MOS00 0138 0000 -- MOS00 0139 0000 030C ORG * ORGX ;Graphics origin -- MOS00 0140 0000 0310 GCSR * GCSX ;Graphics external cursor -- MOS00 0141 0000 0324 GCSIR * GCSIX ;Graphics internal cursor -- MOS00 0142 0000 0320 NEWPT * QEND-&03 ;New point introduced by call to routine. Multiple of 8 ! -- MOS00 0143 0000 031F PLMODE * QEND-&04 ;Plot mode -- MOS00 0144 0000 -- MOS00 0145 0000 ;Plotting lines -- MOS00 0146 0000 -- MOS00 0147 0000 ^ VDUWS -- MOS00 0148 0000 0328 LDELTA # &04 ;DeltaX & DeltaY -- MOS00 0149 0000 032C LSTART # &04 ;Start point for line MOS00 MOS00 MOS00 MOS00 Acorn macro assembler Page 3 MOS00 VDU File -> MOS00 MOS00 -- MOS00 0150 0000 0330 HEND # &02 ;Horizontal end point -- MOS00 0151 0000 0332 D2JVEC # &02 ;Jump vector for D2 -- MOS00 0152 0000 0334 DOTFLG # &01 ;Dotted line flag -- MOS00 0153 0000 0335 LPARMS # &06 ;Parameters for line drawing -- MOS00 0154 0000 -- MOS00 0155 0000 ;Plotting triangles -- MOS00 0156 0000 -- MOS00 0157 0000 ^ VDUWS -- MOS00 0158 0000 0328 HPARMS # &06 -- MOS00 0159 0000 032E HSTART # &04 -- MOS00 0160 0000 0332 HDIREC # &01 -- MOS00 0161 0000 0333 SPARMS # &06 -- MOS00 0162 0000 0339 SSTART # &04 -- MOS00 0163 0000 033D SDIREC # &01 -- MOS00 0164 0000 033E GCSTMP # &08 -- MOS00 0165 0000 -- MOS00 0166 0000 032A HDELTA * HPARMS+&02 -- MOS00 0167 0000 0335 SDELTA * SPARMS+&02 -- MOS00 0168 0000 031B TRINLN * QQ -- MOS00 0169 0000 -- MOS00 0170 0000 ;Teletext temp variable for byte hidden by input cursor -- MOS00 0171 0000 -- MOS00 0172 0000 0338 TTXTMP * VDUWS+&10 ;as nothing available in TTX uses this much storage -- MOS00 0173 0000 -- MOS00 0174 0000 LNK MOS01 -- MOS01 0001 0000 -- MOS01 0002 0000 TTL VDU File - MOS01 -- MOS01 0003 0000 OPT MOS01 MOS01 MOS01 MOS01 MOS01 Acorn macro assembler Page 4 MOS01 VDU File - MOS01 MOS01 -- MOS01 0004 0000 -- MOS01 0005 0000 < &0001 -- MOS01 0006 0000 > &0002 -- MOS01 0007 0000 -- MOS01 0008 0000 ;Last revision 02/06/82 -- MOS01 0009 0000 -- MOS01 0010 0000 ;02/06/82 Remove HWMOFS -- MOS01 0011 0000 ;26/05/82 Concatenate TBZGOE & FCOLTB -- MOS01 0012 0000 ;05/05/82 Reverse bytes of multiplication tables TXTTB & HRGTB -- MOS01 0013 0000 ; Delete LRGTB -- MOS01 0014 0000 ;02/05/82 Concatenate TBZGxx tables -- MOS01 0015 0000 ; Change order of D1 & D2 jump tables & EWTBA -- MOS01 0016 0000 ;21/04/82 Colour mode #5 (which gives no change) included in TBZGxx. -- MOS01 0017 0000 ; External entry points provided -- MOS01 0018 0000 ;15/04/82 NPCOL declared -- MOS01 0019 0000 ;24/03/82 Delete DFSFPG as these are calculated at run time -- MOS01 0020 0000 ;22/01/82 Delete PDIVTB, it wasn't referenced -- MOS01 0021 0000 ; Delete READVP entry point & asssociated jump table -- MOS01 0022 0000 ; Change VDUVEC to VDUVEC, prefix all MOS names with m -- MOS01 0023 0000 ; TRMCH fixed as $0D -- MOS01 0024 0000 ; Soft font default now the exploded default -- MOS01 0025 0000 ;07/01/82 Change MODEL & VDUVEC -- MOS01 0026 0000 ;09/11/81 Change to one entry point for read VDU parameters -- MOS01 0027 0000 ;28/10/81 ETB msb changed from $49 to $59 -- MOS01 0028 0000 ; Chars $C0-$DF taken from $10 (was $0C) -- MOS01 0029 0000 ; Chars $E0-$FF taken from $0C (was $10) -- MOS01 0030 0000 -- MOS01 0031 0000 ; conditional assembly flags -- MOS01 0032 0000 00FF STARTP * &FF ;assume end points plotted twice -- MOS01 0033 0000 0000 PAGEFX * &00 ;Fix bug in page mode (I hope) -- MOS01 0034 0000 ; ($00 => TRUE, $FF => FALSE) -- MOS01 0035 0000 -- MOS01 0036 0000 ;ZERO PAGE VARIABLES -- MOS01 0037 0000 -- MOS01 0038 0000 ^ &00D0 -- MOS01 0039 0000 00D0 STATS # &01 -- MOS01 0040 0000 -- MOS01 0041 0000 ; -- MOS01 0042 0000 00D1 ZMASK # &01 -- MOS01 0043 0000 00D2 ZORA # &01 ;Next four must be in this order -- MOS01 0044 0000 00D3 ZEOR # &01 -- MOS01 0045 0000 00D4 ZGORA # &01 -- MOS01 0046 0000 00D5 ZGEOR # &01 -- MOS01 0047 0000 ; -- MOS01 0048 0000 00D6 ZMEMG # &02 -- MOS01 0049 0000 00D8 ZMEMT # &02 ;Immediately before ZTEMP (SSCRS) -- MOS01 0050 0000 00DA ZTEMP # &02 -- MOS01 0051 0000 00DC ZTEMPB # &02 -- MOS01 0052 0000 00DE ZTEMPC # &02 -- MOS01 0053 0000 00E0 ZTBL # &02 -- MOS01 0054 0000 -- MOS01 0055 0000 ;EQUATE TABLE -- MOS01 0056 0000 -- MOS01 0057 0000 0006 ACKASC * &06 ;Ascii value of acknowledge -- MOS01 0058 0000 00FE INBYTE * &FE ;Dummy colour to indicate invert (illegal colour) -- MOS01 0059 0000 -- MOS01 0060 0000 0020 TTXBCL * &20 ;Byte to clear screen with in TTX -- MOS01 0061 0000 000D TRMCH * &0D ;Byte to terminate edit mode -- MOS01 0062 0000 000C SFPAGE * &0C ;Page of first definable set of characters -- MOS01 0063 0000 003F INVSXT * &3F ;Used to invert logical colour of mode 2 without touching flash -- MOS01 0064 0000 000F NPCOL * &0F ;number of physical colours - 1 -- MOS01 0065 0000 -- MOS01 0066 0000 ;MACHINE CONSTANTS -- MOS01 0067 0000 -- MOS01 0068 0000 FE00 CRTCA * &FE00 ;6845 address reg. -- MOS01 0069 0000 FE01 CRTCD * &FE01 ;6845 data register -- MOS01 0070 0000 -- MOS01 0071 0000 ;ENTRY POINTS -- MOS01 0072 0000 -- MOS01 0073 0000 C300 CODE * &C300 -- MOS01 0074 0000 00C3 CODORG * /CODE -- MOS01 0075 0000 -- MOS01 0076 0000 ORG CODE -- MOS01 0077 C300 -- MOS01 0078 C300 4C FA CA JMP RESET ;Reset VDU to mode (A) -- MOS01 0079 C303 ; JMP GADDR -- MOS01 0080 C303 ; JMP WIND -- MOS01 0081 C303 ; JMP EIGABS -- MOS01 0082 C303 ; JMP IEG -- MOS01 0083 C303 ; JMP PLOT -- MOS01 0084 C303 ; JMP HPLOT -- MOS01 0085 C303 ; JMP SETZG -- MOS01 0086 C303 ; JMP RPXLD -- MOS01 0087 C303 -- MOS01 0088 C303 ; MOS messages to be written by WRSTR -- MOS01 0089 C303 MSG -- MOS01 0090 C303 MSGBBC ;BBC Computer -- MOS01 0091 C303 0D 42 42 = MCR,"BBC Computer ",0 -- MOS01 0092 C312 -- MOS01 0093 C312 MSG16K ;16K -- MOS01 0094 C312 31 36 4B = "16K",BEL,0 -- MOS01 0095 C317 -- MOS01 0096 C317 MSG32K ;32K -- MOS01 0097 C317 33 32 4B = "32K",BEL,0 -- MOS01 0098 C31C -- MOS01 0099 C31C MSG2CR -- MOS01 0100 C31C 08 = &08 -- MOS01 0101 C31D 0D = &0D -- MOS01 0102 C31E 0D = &0D ;uses the next $00 -- MOS01 0103 C31F -- MOS01 0104 C31F ;EXPANDED BIT PATTERN TABLES - must be contiguous -- MOS01 0105 C31F -- MOS01 0106 C31F ;FOUR COLOUR MODE -- MOS01 0107 C31F -- MOS01 0108 C31F 00 BPFTB = &00 -- MOS01 0109 C320 11 = &11 -- MOS01 0110 C321 22 = &22 -- MOS01 0111 C322 33 = &33 -- MOS01 0112 C323 44 = &44 -- MOS01 0113 C324 55 = &55 -- MOS01 0114 C325 66 = &66 -- MOS01 0115 C326 77 = &77 -- MOS01 0116 C327 88 = &88 -- MOS01 0117 C328 99 = &99 -- MOS01 0118 C329 AA = &AA -- MOS01 0119 C32A BB = &BB -- MOS01 0120 C32B CC = &CC -- MOS01 0121 C32C DD = &DD -- MOS01 0122 C32D EE = &EE -- MOS01 0123 C32E FF = &FF -- MOS01 0124 C32F MOS01 MOS01 MOS01 MOS01 Acorn macro assembler Page 5 MOS01 VDU File - MOS01 MOS01 -- MOS01 0125 C32F ;SIXTEEN COLOUR MODE -- MOS01 0126 C32F -- MOS01 0127 C32F 00 BPSTB = &00 -- MOS01 0128 C330 55 = &55 -- MOS01 0129 C331 AA = &AA -- MOS01 0130 C332 FF = &FF -- MOS01 0131 C333 -- MOS01 0132 C333 -- MOS01 0133 C333 ;JUMP TABLES Lower byte -- MOS01 0134 C333 -- MOS01 0135 C333 12 JTBLO = ACK ;Points to an RTS -- MOS01 0136 C334 3C = SOH -- MOS01 0137 C335 95 = STX -- MOS01 0138 C336 A0 = ETX -- MOS01 0139 C337 AC = EOT -- MOS01 0140 C338 B8 = ENQ -- MOS01 0141 C339 12 = ACK -- MOS01 0142 C33A 9B = BELL -- MOS01 0143 C33B C4 = BS -- MOS01 0144 C33C 63 = HT -- MOS01 0145 C33D EF = LF -- MOS01 0146 C33E 5A = VT -- MOS01 0147 C33F 47 = FF -- MOS01 0148 C340 B9 = CR -- MOS01 0149 C341 8C = SO -- MOS01 0150 C342 A5 = SI -- MOS01 0151 C343 C7 = DLE -- MOS01 0152 C344 00 = DCA -- MOS01 0153 C345 04 = DCB -- MOS01 0154 C346 82 = DCC -- MOS01 0155 C347 3F = DCD -- MOS01 0156 C348 9A = NAK -- MOS01 0157 C349 D0 = SYN -- MOS01 0158 C34A D6 = ETB -- MOS01 0159 C34B 0D = CAN -- MOS01 0160 C34C 62 = EM -- MOS01 0161 C34D 93 = SUB -- MOS01 0162 C34E 12 = ACK ;Points to an RTS -- MOS01 0163 C34F F9 = FS -- MOS01 0164 C350 76 = GS -- MOS01 0165 C351 64 = RS -- MOS01 0166 C352 91 = US -- MOS01 0167 C353 D8 = DEL -- MOS01 0168 C354 -- MOS01 0169 C354 ;Higher byte unless bytes to be queued, in which case, lower nibble -- MOS01 0170 C354 ;gives number of bytes to be queued, upper offset of higher byte -- MOS01 0171 C354 ;of routine address from code origin as specified by CODORG. Note -- MOS01 0172 C354 ;that this must be <8, i.e. biy 7 of whole byte is clear. -- MOS01 0173 C354 -- MOS01 0174 C354 C5 JTBHI = /(ACK ) ;Points to an RTS -- MOS01 0175 C355 2F = SOH:SHR:&8-CODORG:SHL:&4+&10-&1 ;Queue 1 byte (SOH) -- MOS01 0176 C356 C5 = /(STX ) -- MOS01 0177 C357 C5 = /(ETX ) -- MOS01 0178 C358 C5 = /(EOT ) -- MOS01 0179 C359 C5 = /(ENQ ) -- MOS01 0180 C35A C5 = /(ACK ) -- MOS01 0181 C35B E8 = /(BELL ) -- MOS01 0182 C35C C5 = /(BS ) -- MOS01 0183 C35D C6 = /(HT ) -- MOS01 0184 C35E C6 = /(LF ) -- MOS01 0185 C35F C6 = /(VT ) -- MOS01 0186 C360 C7 = /(FF ) -- MOS01 0187 C361 C7 = /(CR ) -- MOS01 0188 C362 C5 = /(SO ) -- MOS01 0189 C363 C5 = /(SI ) -- MOS01 0190 C364 C7 = /(DLE ) -- MOS01 0191 C365 5F = DCA:SHR:&8-CODORG:SHL:&4+&10-&1 ;Queue 1 byte (DCA) -- MOS01 0192 C366 5E = DCB:SHR:&8-CODORG:SHL:&4+&10-&2 ;Queue 2 bytes (DCB) -- MOS01 0193 C367 5B = DCC:SHR:&8-CODORG:SHL:&4+&10-&5 ;Queue 5 bytes (DCC) -- MOS01 0194 C368 C8 = /(DCD ) -- MOS01 0195 C369 C5 = /(NAK ) -- MOS01 0196 C36A 5F = SYN:SHR:&8-CODORG:SHL:&4+&10-&1 ;Queue 1 byte (SYN) -- MOS01 0197 C36B 57 = ETB:SHR:&8-CODORG:SHL:&4+&10-&9 ;Queue 9 bytes (ETB) -- MOS01 0198 C36C 78 = CAN:SHR:&8-CODORG:SHL:&4+&10-&8 ;Queue 8 bytes (CAN) -- MOS01 0199 C36D 6B = EM:SHR:&8-CODORG:SHL:&4+&10-&5 ;Queue 5 bytes (EM) -- MOS01 0200 C36E C9 = /(SUB ) -- MOS01 0201 C36F C5 = /(ACK ) ;Points to an RTS -- MOS01 0202 C370 3C = FS:SHR:&8-CODORG:SHL:&4+&10-&4 ;Queue 4 bytes (FS) -- MOS01 0203 C371 7C = GS:SHR:&8-CODORG:SHL:&4+&10-&4 ;Queue 4 bytes (GS) -- MOS01 0204 C372 C7 = /(RS ) -- MOS01 0205 C373 4E = US:SHR:&8-CODORG:SHL:&4+&10-&2 ;Queue 2 bytes (US) -- MOS01 0206 C374 CF = /(DEL ) -- MOS01 0207 C375 -- MOS01 0208 C375 ;ROW OFFSETS FOR H.R.G. -- MOS01 0209 C375 -- MOS01 0210 C375 00 HRGTB = &00 -- MOS01 0211 C376 00 = &00 -- MOS01 0212 C377 02 = &02 -- MOS01 0213 C378 80 = &80 -- MOS01 0214 C379 05 = &05 -- MOS01 0215 C37A 00 = &00 -- MOS01 0216 C37B 07 = &07 -- MOS01 0217 C37C 80 = &80 -- MOS01 0218 C37D 0A = &0A -- MOS01 0219 C37E 00 = &00 -- MOS01 0220 C37F 0C = &0C -- MOS01 0221 C380 80 = &80 -- MOS01 0222 C381 0F = &0F -- MOS01 0223 C382 00 = &00 -- MOS01 0224 C383 11 = &11 -- MOS01 0225 C384 80 = &80 -- MOS01 0226 C385 14 = &14 -- MOS01 0227 C386 00 = &00 -- MOS01 0228 C387 16 = &16 -- MOS01 0229 C388 80 = &80 -- MOS01 0230 C389 19 = &19 -- MOS01 0231 C38A 00 = &00 -- MOS01 0232 C38B 1B = &1B -- MOS01 0233 C38C 80 = &80 -- MOS01 0234 C38D 1E = &1E -- MOS01 0235 C38E 00 = &00 -- MOS01 0236 C38F 20 = &20 -- MOS01 0237 C390 80 = &80 -- MOS01 0238 C391 23 = &23 -- MOS01 0239 C392 00 = &00 -- MOS01 0240 C393 25 = &25 -- MOS01 0241 C394 80 = &80 -- MOS01 0242 C395 28 = &28 -- MOS01 0243 C396 00 = &00 -- MOS01 0244 C397 2A = &2A -- MOS01 0245 C398 80 = &80 MOS01 MOS01 MOS01 MOS01 Acorn macro assembler Page 6 MOS01 VDU File - MOS01 MOS01 -- MOS01 0246 C399 2D = &2D -- MOS01 0247 C39A 00 = &00 -- MOS01 0248 C39B 2F = &2F -- MOS01 0249 C39C 80 = &80 -- MOS01 0250 C39D 32 = &32 -- MOS01 0251 C39E 00 = &00 -- MOS01 0252 C39F 34 = &34 -- MOS01 0253 C3A0 80 = &80 -- MOS01 0254 C3A1 37 = &37 -- MOS01 0255 C3A2 00 = &00 -- MOS01 0256 C3A3 39 = &39 -- MOS01 0257 C3A4 80 = &80 -- MOS01 0258 C3A5 3C = &3C -- MOS01 0259 C3A6 00 = &00 -- MOS01 0260 C3A7 3E = &3E -- MOS01 0261 C3A8 80 = &80 -- MOS01 0262 C3A9 41 = &41 -- MOS01 0263 C3AA 00 = &00 -- MOS01 0264 C3AB 43 = &43 -- MOS01 0265 C3AC 80 = &80 -- MOS01 0266 C3AD 46 = &46 -- MOS01 0267 C3AE 00 = &00 -- MOS01 0268 C3AF 48 = &48 -- MOS01 0269 C3B0 80 = &80 -- MOS01 0270 C3B1 4B = &4B -- MOS01 0271 C3B2 00 = &00 -- MOS01 0272 C3B3 4D = &4D -- MOS01 0273 C3B4 80 = &80 -- MOS01 0274 C3B5 -- MOS01 0275 C3B5 ;ROW OFFSET TABLE FOR TELETEXT -- MOS01 0276 C3B5 -- MOS01 0277 C3B5 00 TXTTB = &00 -- MOS01 0278 C3B6 00 = &00 -- MOS01 0279 C3B7 00 = &00 -- MOS01 0280 C3B8 28 = &28 -- MOS01 0281 C3B9 00 = &00 -- MOS01 0282 C3BA 50 = &50 -- MOS01 0283 C3BB 00 = &00 -- MOS01 0284 C3BC 78 = &78 -- MOS01 0285 C3BD 00 = &00 -- MOS01 0286 C3BE A0 = &A0 -- MOS01 0287 C3BF 00 = &00 -- MOS01 0288 C3C0 C8 = &C8 -- MOS01 0289 C3C1 00 = &00 -- MOS01 0290 C3C2 F0 = &F0 -- MOS01 0291 C3C3 01 = &01 -- MOS01 0292 C3C4 18 = &18 -- MOS01 0293 C3C5 01 = &01 -- MOS01 0294 C3C6 40 = &40 -- MOS01 0295 C3C7 01 = &01 -- MOS01 0296 C3C8 68 = &68 -- MOS01 0297 C3C9 01 = &01 -- MOS01 0298 C3CA 90 = &90 -- MOS01 0299 C3CB 01 = &01 -- MOS01 0300 C3CC B8 = &B8 -- MOS01 0301 C3CD 01 = &01 -- MOS01 0302 C3CE E0 = &E0 -- MOS01 0303 C3CF 02 = &02 -- MOS01 0304 C3D0 08 = &08 -- MOS01 0305 C3D1 02 = &02 -- MOS01 0306 C3D2 30 = &30 -- MOS01 0307 C3D3 02 = &02 -- MOS01 0308 C3D4 58 = &58 -- MOS01 0309 C3D5 02 = &02 -- MOS01 0310 C3D6 80 = &80 -- MOS01 0311 C3D7 02 = &02 -- MOS01 0312 C3D8 A8 = &A8 -- MOS01 0313 C3D9 02 = &02 -- MOS01 0314 C3DA D0 = &D0 -- MOS01 0315 C3DB 02 = &02 -- MOS01 0316 C3DC F8 = &F8 -- MOS01 0317 C3DD 03 = &03 -- MOS01 0318 C3DE 20 = &20 -- MOS01 0319 C3DF 03 = &03 -- MOS01 0320 C3E0 48 = &48 -- MOS01 0321 C3E1 03 = &03 -- MOS01 0322 C3E2 70 = &70 -- MOS01 0323 C3E3 03 = &03 -- MOS01 0324 C3E4 98 = &98 -- MOS01 0325 C3E5 03 = &03 -- MOS01 0326 C3E6 C0 = &C0 -- MOS01 0327 C3E7 -- MOS01 0328 C3E7 ;NO. ROWS IN EACH MEMORY MODE -- MOS01 0329 C3E7 -- MOS01 0330 C3E7 1F PROWS = &1F -- MOS01 0331 C3E8 1F = &1F -- MOS01 0332 C3E9 1F = &1F -- MOS01 0333 C3EA 18 = &18 -- MOS01 0334 C3EB 1F = &1F -- MOS01 0335 C3EC 1F = &1F -- MOS01 0336 C3ED 18 = &18 -- MOS01 0337 C3EE 18 = &18 -- MOS01 0338 C3EF -- MOS01 0339 C3EF ;NO. COLS. IN EACH MEMORY MODE -- MOS01 0340 C3EF -- MOS01 0341 C3EF 4F PCOLS = &4F -- MOS01 0342 C3F0 27 = &27 -- MOS01 0343 C3F1 13 = &13 -- MOS01 0344 C3F2 4F = &4F -- MOS01 0345 C3F3 27 = &27 -- MOS01 0346 C3F4 13 = &13 -- MOS01 0347 C3F5 27 = &27 -- MOS01 0348 C3F6 27 = &27 -- MOS01 0349 C3F7 -- MOS01 0350 C3F7 ;BYTES TO BE LOADED INTO mMODREG FOR DIFFERENT MODES -- MOS01 0351 C3F7 -- MOS01 0352 C3F7 9C INDMOD = &9C -- MOS01 0353 C3F8 D8 = &D8 -- MOS01 0354 C3F9 F4 = &F4 -- MOS01 0355 C3FA 9C = &9C -- MOS01 0356 C3FB 88 = &88 -- MOS01 0357 C3FC C4 = &C4 -- MOS01 0358 C3FD 88 = &88 -- MOS01 0359 C3FE 4B = &4B -- MOS01 0360 C3FF -- MOS01 0361 C3FF ;BYTES PER CHARACTER -- MOS01 0362 C3FF ;IN EACH MODE -- MOS01 0363 C3FF -- MOS01 0364 C3FF 08 BYTCHT = &08 -- MOS01 0365 C400 10 = &10 -- MOS01 0366 C401 20 = &20 MOS01 MOS01 MOS01 MOS01 Acorn macro assembler Page 7 MOS01 VDU File - MOS01 MOS01 -- MOS01 0367 C402 08 = &08 -- MOS01 0368 C403 08 = &08 -- MOS01 0369 C404 10 = &10 -- MOS01 0370 C405 08 = &08 -- MOS01 0371 C406 01 = &01 -- MOS01 0372 C407 -- MOS01 0373 C407 ;MASK TABLES - must be contiguous -- MOS01 0374 C407 -- MOS01 0375 C407 ;For each mode, the masks of each pixel, MS first -- MOS01 0376 C407 ;Note that it is now assumed that adjacent masks may be generated -- MOS01 0377 C407 ;by either ASL or LSR. -- MOS01 0378 C407 -- MOS01 0379 C407 ;SIXTEEN colour mode -- MOS01 0380 C407 -- MOS01 0381 C407 AA MASKTB = &AA -- MOS01 0382 C408 55 = &55 -- MOS01 0383 C409 -- MOS01 0384 C409 ;FOUR colour mode -- MOS01 0385 C409 88 = &88 -- MOS01 0386 C40A 44 = &44 -- MOS01 0387 C40B 22 = &22 -- MOS01 0388 C40C 11 = &11 -- MOS01 0389 C40D -- MOS01 0390 C40D ;TWO colour mode -- MOS01 0391 C40D -- MOS01 0392 C40D 80 BITTBL = &80 -- MOS01 0393 C40E 40 = &40 -- MOS01 0394 C40F 20 = &20 -- MOS01 0395 C410 10 = &10 -- MOS01 0396 C411 08 = &08 -- MOS01 0397 C412 04 = &04 -- MOS01 0398 C413 -- MOS01 0399 C413 02 = &02 ;**** NEXT 3 BYTES USED BY CFS **** -- MOS01 0400 C414 ;Uses $01 of next table -- MOS01 0401 C414 -- MOS01 0402 C414 ;COLOURS AVAILABLE FOR MODES -- MOS01 0403 C414 -- MOS01 0404 C414 01 COLMOD = &01 -- MOS01 0405 C415 03 = &03 -- MOS01 0406 C416 0F = &0F -- MOS01 0407 C417 -- MOS01 0408 C417 01 = &01 ;**** NEXT 3 BYTES USED BY CFS **** -- MOS01 0409 C418 01 = &01 -- MOS01 0410 C419 03 = &03 -- MOS01 0411 C41A 01 = &01 -- MOS01 0412 C41B ;TTX - must be 0 - uses 1st byte of next table -- MOS01 0413 C41B -- MOS01 0414 C41B ;Bytes for forming ZGORA & ZGEOR -- MOS01 0415 C41B ;Tables have been run into each other to save bytes. -- MOS01 0416 C41B ;They should be as follows -- MOS01 0417 C41B -- MOS01 0418 C41B ;TBZGOO OR the OR :- $FF,$00,$00,$FF,$FF,$FF -- MOS01 0419 C41B ;TBZGEO EOR the OR :- $00,$00,$FF,$FF,$FF,$FF -- MOS01 0420 C41B ;TBZGOE OR the EOR :- $00,$FF,$00,$00,$FF,$FF -- MOS01 0421 C41B ;TBZGEE EOR the EOR :- $FF,$FF,$FF,$00,$00,$FF -- MOS01 0422 C41B -- MOS01 0423 C41B ;These are for the colour modes 0 to 5, being -- MOS01 0424 C41B ;0=Store,1=OR,2=AND,3=EOR,4=Invert,5=No change -- MOS01 0425 C41B -- MOS01 0426 C41B 00 TBZGOE = &00 -- MOS01 0427 C41C FF TBZGOO = &FF -- MOS01 0428 C41D 00 TBZGEO = &00 -- MOS01 0429 C41E 00 = &00 -- MOS01 0430 C41F FF = &FF -- MOS01 0431 C420 FF TBZGEE = &FF -- MOS01 0432 C421 FF = &FF -- MOS01 0433 C422 FF = &FF -- MOS01 0434 C423 00 = &00 ;Uses next $00, $FF -- MOS01 0435 C424 -- MOS01 0436 C424 ;~~~ COLOUR TABLES ~~~ -- MOS01 0437 C424 -- MOS01 0438 C424 ;FULL COLOUR TABLES -- MOS01 0439 C424 ;Tables of 'full colours', -- MOS01 0440 C424 ;i.e. of bytes with all bits -- MOS01 0441 C424 ;set to 1 colour, in ascending -- MOS01 0442 C424 ;colour order -- MOS01 0443 C424 -- MOS01 0444 C424 00 FCOLTB = &00 ;Two colour table -- MOS01 0445 C425 FF = &FF -- MOS01 0446 C426 -- MOS01 0447 C426 ;Four colour table -- MOS01 0448 C426 -- MOS01 0449 C426 00 = &00 -- MOS01 0450 C427 0F = &0F -- MOS01 0451 C428 F0 = &F0 -- MOS01 0452 C429 FF = &FF -- MOS01 0453 C42A -- MOS01 0454 C42A ;Sixteen colour table -- MOS01 0455 C42A -- MOS01 0456 C42A 00 = &00 -- MOS01 0457 C42B 03 = &03 -- MOS01 0458 C42C 0C = &0C -- MOS01 0459 C42D 0F = &0F -- MOS01 0460 C42E 30 = &30 -- MOS01 0461 C42F 33 = &33 -- MOS01 0462 C430 3C = &3C -- MOS01 0463 C431 3F = &3F ;INVSXT This byte used to invert graphics pixels -- MOS01 0464 C432 C0 = &C0 -- MOS01 0465 C433 C3 = &C3 -- MOS01 0466 C434 CC = &CC -- MOS01 0467 C435 CF = &CF -- MOS01 0468 C436 F0 = &F0 -- MOS01 0469 C437 F3 = &F3 -- MOS01 0470 C438 FC = &FC -- MOS01 0471 C439 FF = &FF -- MOS01 0472 C43A -- MOS01 0473 C43A ;TABLE FOR NPIX -- MOS01 0474 C43A -- MOS01 0475 C43A ;No. pixles per byte in each graphics mode -- MOS01 0476 C43A ;(0 if not graphics) -- MOS01 0477 C43A -- MOS01 0478 C43A 07 NPIXTB = &07 -- MOS01 0479 C43B 03 = &03 -- MOS01 0480 C43C 01 = &01 -- MOS01 0481 C43D 00 = &00 ;(Non graphics) -- MOS01 0482 C43E 07 = &07 -- MOS01 0483 C43F 03 = &03 -- MOS01 0484 C440 ;Non-graphics modes - use next 2 $00s -- MOS01 0485 C440 -- MOS01 0486 C440 ;MEMORY MAP TYPES -- MOS01 0487 C440 ;Index from MODE (0..7), to MOS01 MOS01 MOS01 MOS01 Acorn macro assembler Page 8 MOS01 VDU File - MOS01 MOS01 -- MOS01 0488 C440 ;the following 5 element tables -- MOS01 0489 C440 -- MOS01 0490 C440 MODETB -- MOS01 0491 C440 00 = &00 -- MOS01 0492 C441 SOUNDV ;channel dependent period offset -- MOS01 0493 C441 C43D SCHOFF * SOUNDV -&04 -- MOS01 0494 C441 -- MOS01 0495 C441 00 = &00 -- MOS01 0496 C442 00 = &00 -- MOS01 0497 C443 01 = &01 -- MOS01 0498 C444 02 = &02 -- MOS01 0499 C445 02 = &02 -- MOS01 0500 C446 03 = &03 -- MOS01 0501 C447 ;Uses $04 of next table -- MOS01 0502 C447 -- MOS01 0503 C447 -- MOS01 0504 C447 ;EXIT WINDOW OFFSET TABLE -- MOS01 0505 C447 -- MOS01 0506 C447 04 EWTBA = &04 -- MOS01 0507 C448 00 = &00 -- MOS01 0508 C449 06 = &06 -- MOS01 0509 C44A 02 = &02 -- MOS01 0510 C44B -- MOS01 0511 C44B -- MOS01 0512 C44B ;C0 control table -- MOS01 0513 C44B ;C1 control table -- MOS01 0514 C44B -- MOS01 0515 C44B 0D CONE = &0D -- MOS01 0516 C44C 05 = &05 -- MOS01 0517 C44D 0D = &0D -- MOS01 0518 C44E 05 = &05 ;Uses next $04 -- MOS01 0519 C44F 04 CZERO = &04 -- MOS01 0520 C450 04 = &04 -- MOS01 0521 C451 0C = &0C -- MOS01 0522 C452 0C = &0C -- MOS01 0523 C453 04 = &04 -- MOS01 0524 C454 -- MOS01 0525 C454 ;TABLES OF JUMP VECTORS -- MOS01 0526 C454 ;FOR CLEAR SCREEN -- MOS01 0527 C454 -- MOS01 0528 C454 07 CLSCTA = CLASCA ;(LSB) -- MOS01 0529 C455 37 = CLASCB -- MOS01 0530 C456 7F = CLASCC -- MOS01 0531 C457 97 = CLASCD -- MOS01 0532 C458 EB = CLASCE -- MOS01 0533 C459 -- MOS01 0534 C459 ;CLSCTB = CLASCA / ;(MSB) -- MOS01 0535 C459 ; = CLASCB / -- MOS01 0536 C459 ; = CLASCC / -- MOS01 0537 C459 ; = CLASCD / -- MOS01 0538 C459 ; = CLASCE / -- MOS01 0539 C459 -- MOS01 0540 C459 ;NO. BYTES PER SCREEN (MSB) -- MOS01 0541 C459 -- MOS01 0542 C459 50 BYTSTA = &50 -- MOS01 0543 C45A 40 = &40 -- MOS01 0544 C45B 28 = &28 -- MOS01 0545 C45C 20 = &20 -- MOS01 0546 C45D 04 = &04 -- MOS01 0547 C45E -- MOS01 0548 C45E ;MSB OF SCREEN START -- MOS01 0549 C45E -- MOS01 0550 C45E 30 STSCTB = &30 -- MOS01 0551 C45F 40 = &40 -- MOS01 0552 C460 58 = &58 -- MOS01 0553 C461 60 = &60 -- MOS01 0554 C462 7C = &7C -- MOS01 0555 C463 -- MOS01 0556 C463 ;BYTE WIDTH TYPES -- MOS01 0557 C463 ;Index from MEMODE (0..4), to -- MOS01 0558 C463 ;the following 3 element tables -- MOS01 0559 C463 -- MOS01 0560 C463 ;Now replaced with LSRA -- MOS01 0561 C463 -- MOS01 0562 C463 ;LSB OF NO. BYTES PER ROW -- MOS01 0563 C463 -- MOS01 0564 C463 28 BYTRTA = &28 -- MOS01 0565 C464 40 = &40 -- MOS01 0566 C465 80 = &80 -- MOS01 0567 C466 -- MOS01 0568 C466 ;LSB OF SCREEN OFFSET TABLES -- MOS01 0569 C466 -- MOS01 0570 C466 B5 TBZTBA = TXTTB -- MOS01 0571 C467 75 = HRGTB -- MOS01 0572 C468 75 = HRGTB -- MOS01 0573 C469 -- MOS01 0574 C469 -- MOS01 0575 C469 ;CRTC TABLES -- MOS01 0576 C469 -- MOS01 0577 C469 ;INDEX FOR CRTC TABLES -- MOS01 0578 C469 -- MOS01 0579 C469 0B CRTCX = &0B -- MOS01 0580 C46A 17 = &17 -- MOS01 0581 C46B 23 = &23 -- MOS01 0582 C46C 2F = &2F -- MOS01 0583 C46D 3B = &3B -- MOS01 0584 C46E -- MOS01 0585 C46E ;CRTC TABLE FOR MODES 0-2 -- MOS01 0586 C46E -- MOS01 0587 C46E 7F CRTCTB = &7F -- MOS01 0588 C46F 50 = &50 -- MOS01 0589 C470 62 = &62 -- MOS01 0590 C471 28 = &28 ;VS=2 -- MOS01 0591 C472 26 = &26 -- MOS01 0592 C473 00 = &00 -- MOS01 0593 C474 20 = &20 -- MOS01 0594 C475 22 = &22 ;was $22 & then it was $23 -- MOS01 0595 C476 01 = &01 -- MOS01 0596 C477 07 = &07 -- MOS01 0597 C478 67 = &67 -- MOS01 0598 C479 08 = &08 -- MOS01 0599 C47A -- MOS01 0600 C47A ;CRTC TABLE FOR MODE 3 -- MOS01 0601 C47A -- MOS01 0602 C47A 7F = &7F -- MOS01 0603 C47B 50 = &50 -- MOS01 0604 C47C 62 = &62 -- MOS01 0605 C47D 28 = &28 ;VS=2 -- MOS01 0606 C47E 1E = &1E -- MOS01 0607 C47F 02 = &02 -- MOS01 0608 C480 19 = &19 MOS01 MOS01 MOS01 MOS01 Acorn macro assembler Page 9 MOS01 VDU File - MOS01 MOS01 -- MOS01 0609 C481 1B = &1B ;was $1B & then it was $1C -- MOS01 0610 C482 01 = &01 -- MOS01 0611 C483 09 = &09 -- MOS01 0612 C484 67 = &67 -- MOS01 0613 C485 09 = &09 -- MOS01 0614 C486 -- MOS01 0615 C486 ;CRTC TABLE FOR MODES 4-5 -- MOS01 0616 C486 -- MOS01 0617 C486 3F = &3F -- MOS01 0618 C487 28 = &28 -- MOS01 0619 C488 31 = &31 -- MOS01 0620 C489 24 = &24 ;VS=2 -- MOS01 0621 C48A 26 = &26 -- MOS01 0622 C48B 00 = &00 -- MOS01 0623 C48C 20 = &20 -- MOS01 0624 C48D 22 = &22 ;was $22 & then it was $23 -- MOS01 0625 C48E 01 = &01 -- MOS01 0626 C48F 07 = &07 -- MOS01 0627 C490 67 = &67 -- MOS01 0628 C491 08 = &08 -- MOS01 0629 C492 -- MOS01 0630 C492 ;CRTC TABLE FOR MODE 6 -- MOS01 0631 C492 -- MOS01 0632 C492 3F = &3F -- MOS01 0633 C493 28 = &28 -- MOS01 0634 C494 31 = &31 -- MOS01 0635 C495 24 = &24 ;VS=2 -- MOS01 0636 C496 1E = &1E -- MOS01 0637 C497 02 = &02 -- MOS01 0638 C498 19 = &19 -- MOS01 0639 C499 1B = &1B ;was $1B & then it was $1C -- MOS01 0640 C49A 01 = &01 -- MOS01 0641 C49B 09 = &09 -- MOS01 0642 C49C 67 = &67 -- MOS01 0643 C49D 09 = &09 -- MOS01 0644 C49E -- MOS01 0645 C49E ;CRTC TABLE FOR MODE 7 -- MOS01 0646 C49E -- MOS01 0647 C49E 3F = &3F -- MOS01 0648 C49F 28 = &28 -- MOS01 0649 C4A0 33 = &33 -- MOS01 0650 C4A1 24 = &24 ;VS=2 -- MOS01 0651 C4A2 1E = &1E -- MOS01 0652 C4A3 02 = &02 -- MOS01 0653 C4A4 19 = &19 -- MOS01 0654 C4A5 1B = &1B ;was $1B & then it was $1C -- MOS01 0655 C4A6 93 = &93 -- MOS01 0656 C4A7 12 = &12 -- MOS01 0657 C4A8 72 = &72 -- MOS01 0658 C4A9 13 = &13 -- MOS01 0659 C4AA -- MOS01 0660 C4AA ;JUMP TABLES FOR PLOTTING ROUTINES -- MOS01 0661 C4AA -- MOS01 0662 C4AA 56 D1JTB = EA -- MOS01 0663 C4AB D3 = /(EA ) -- MOS01 0664 C4AC 4E = NA -- MOS01 0665 C4AD D3 = /(NA ) -- MOS01 0666 C4AE -- MOS01 0667 C4AE 3A D2JTBL = EB -- MOS01 0668 C4AF 44 = WB -- MOS01 0669 C4B0 12 = NB -- MOS01 0670 C4B1 1B = SB -- MOS01 0671 C4B2 -- MOS01 0672 C4B2 D3 D2JTBH = /(EB ) -- MOS01 0673 C4B3 D3 = /(WB ) -- MOS01 0674 C4B4 D3 = /(NB ) -- MOS01 0675 C4B5 D3 = /(SB ) -- MOS01 0676 C4B6 -- MOS01 0677 C4B6 -- MOS01 0678 C4B6 ;TELETEXT CONVERSION TABLE -- MOS01 0679 C4B6 -- MOS01 0680 C4B6 23 TTXTB = &23 -- MOS01 0681 C4B7 5F = &5F -- MOS01 0682 C4B8 60 = &60 -- MOS01 0683 C4B9 23 = &23 -- MOS01 0684 C4BA -- MOS01 0685 C4BA -- MOS01 0686 C4BA ; font table -- MOS01 0687 C4BA -- MOS01 0688 C4BA FFSZOT ;Four,Five,Six,Zero,One,Two -- MOS01 0689 C4BA 04 = &04 -- MOS01 0690 C4BB 05 = &05 -- MOS01 0691 C4BC 06 = &06 -- MOS01 0692 C4BD 00 = &00 -- MOS01 0693 C4BE 01 = &01 -- MOS01 0694 C4BF 02 = &02 -- MOS01 0695 C4C0 -- MOS01 0696 C4C0 -- MOS01 0697 C4C0 LNK MOS02 -- MOS02 0001 C4C0 -- MOS02 0002 C4C0 TTL VDU File - MOS02 -- MOS02 0003 C4C0 OPT MOS02 MOS02 MOS02 MOS02 MOS02 Acorn macro assembler Page 10 MOS02 VDU File - MOS02 MOS02 -- MOS02 0004 C4C0 -- MOS02 0005 C4C0 ;Last revision 30/04/82 -- MOS02 0006 C4C0 -- MOS02 0007 C4C0 ;30/04/82 Recoded to allow for reverse queueing -- MOS02 0008 C4C0 ;19/04/82 To put ASCIQ in line, and various other byte savings -- MOS02 0009 C4C0 ;19/11/81 No longer include bell in printer range check -- MOS02 0010 C4C0 -- MOS02 0011 C4C0 -- MOS02 0012 C4C0 ;ENTRY POINT - SELECT ROUTINE -- MOS02 0013 C4C0 -- MOS02 0014 C4C0 -- MOS02 0015 C4C0 VDU -- MOS02 0016 C4C0 AE 6A 02 LDX QPOSN ;Are we Qing ? -- MOS02 0017 C4C3 D0 4E BNE QING ;Yes?, then queue this byte MOS02 0017 C4C3 v31 MOS02 0018 C4C5 24 D0 BIT STATS MOS02 0017 C4C3 v31 MOS02 0019 C4C7 50 0F BVC NOTCEA ;In C.E. mode? MOS02 0017 C4C3 v31 MOS02 0020 C4C9 20 67 C5 JSR CSWAP ;Yes?, then swap cursors MOS02 0017 C4C3 v31 MOS02 0021 C4CC 20 60 CD JSR OCSRDL ;Delete the output cursor MOS02 0017 C4C3 v31 MOS02 0022 C4CF 30 07 BMI NOTCEA ;Are we disabled ? then skip MOS02 0017 C4C3 v31 MOS02 0023 C4D1 C9 0D CMPIM TRMCH ;No?, then is this TRMCH ? MOS02 0017 C4C3 v31 MOS02 0024 C4D3 D0 03 BNE NOTCEA MOS02 0017 C4C3 v31 MOS02 0025 C4D5 20 A8 D8 JSR CSEDEX ;Yes?, then exit C.E. mode MOS02 0017 C4C3 v31 MOS02 0026 C4D8 C9 7F NOTCEA CMPIM &7F ;No?, then form vector MOS02 0017 C4C3 v31 MOS02 0027 C4DA F0 13 BEQ ISDEL MOS02 0017 C4C3 v31 MOS02 0028 C4DC C9 20 CMPIM &20 MOS02 0017 C4C3 v31 MOS02 0029 C4DE 90 11 BCC NOTDEL ; Branch if unprintable MOS02 0017 C4C3 v31 MOS02 0030 C4E0 24 D0 BIT STATS ;Printable - are we disabled ? MOS02 0017 C4C3 v31 MOS02 0031 C4E2 30 06 BMI NOTC20 ;Yes, then print it if print module on MOS02 0017 C4C3 v31 MOS02 0032 C4E4 20 A7 CF JSR VDUPR ;No?, then print to VDU MOS02 0017 C4C3 v31 MOS02 0033 C4E7 20 63 C6 JSR HT MOS02 0017 C4C3 v31 MOS02 0034 C4EA [ MOS125 = &FF MOS02 0017 C4C3 v31 MOS02 0036 C4EA | MOS02 0017 C4C3 v31 MOS02 0037 C4EA NOTC20 ;A dead MOS02 0017 C4C3 v31 MOS02 0038 C4EA A5 D0 LDA STATS MOS02 0017 C4C3 v31 MOS02 0039 C4EC 4A LSRA ;C=1 if printer module on MOS02 0017 C4C3 v31 MOS02 0040 C4ED 10 71 BPL CSWDEX ;& ditto MOS02 0040 C4ED v0E MOS02 0041 C4EF ] MOS02 0040 C4ED v0E MOS02 0042 C4EF MOS02 0040 C4ED v0E MOS02 0043 C4EF A9 20 ISDEL LDAIM &20 ;(Form correct index for DEL) MOS02 0040 C4ED v0E MOS02 0044 C4F1 MOS02 0040 C4ED v0E MOS02 0045 C4F1 A8 NOTDEL TAY MOS02 0040 C4ED v0E MOS02 0046 C4F2 B9 33 C3 LDAAY JTBLO ;Get LSByte of jump vector MOS02 0040 C4ED v0E MOS02 0047 C4F5 8D 5D 03 STA JVEC MOS02 0040 C4ED v0E MOS02 0048 C4F8 B9 54 C3 LDAAY JTBHI ;Get MSByte MOS02 0040 C4ED v0E MOS02 0049 C4FB 30 4A BMI REXEC ;No Qing required, so execute routine MOS02 0040 C4ED v0E MOS02 0050 C4FD AA TAX ;b7=0, so Q needed - set it up MOS02 0040 C4ED v0E MOS02 0051 C4FE 09 F0 ORAIM &F0 ;2's comp. of no. of bytes to Q MOS02 0040 C4ED v0E MOS02 0052 C500 8D 6A 02 STA QPOSN MOS02 0040 C4ED v0E MOS02 0053 C503 8A TXA ;Generate MSByte of address - MSNybble, plus CODORG MOS02 0040 C4ED v0E MOS02 0054 C504 4A LSRA MOS02 0040 C4ED v0E MOS02 0055 C505 4A LSRA MOS02 0040 C4ED v0E MOS02 0056 C506 4A LSRA MOS02 0040 C4ED v0E MOS02 0057 C507 4A LSRA MOS02 0040 C4ED v0E MOS02 0058 C508 18 CLC MOS02 0040 C4ED v0E MOS02 0059 C509 69 C3 ADCIM CODORG ;Forms the high byte of the vector MOS02 0040 C4ED v0E MOS02 0060 C50B 8D 5E 03 STA JVEC +&01 MOS02 0040 C4ED v0E MOS02 0061 C50E 24 D0 BIT STATS ;Swap back again if C.E. MOS02 0040 C4ED v0E MOS02 0062 C510 70 1E BVS NOTC10 MOS02 0040 C4ED v0E MOS02 0063 C512 [ MOS125 = &FF MOS02 0040 C4ED v0E MOS02 0065 C512 | MOS02 0040 C4ED v0E MOS02 0066 C512 ;adcim codorg never overflows (here...), C=0 MOS02 0040 C4ED v0E MOS02 0067 C512 ] MOS02 0040 C4ED v0E MOS02 0068 C512 60 ACK RTS ;NUL points at this to save a byte MOS02 0040 C4ED v0E MOS02 0069 C513 MOS02 0040 C4ED v0E MOS02 0070 C513 MOS02 0040 C4ED v0E MOS02 0071 C513 9D 24 02 QING STAAX QEND-&FF ;Q the byte MOS02 0040 C4ED v0E MOS02 0072 C516 E8 INX MOS02 0040 C4ED v0E MOS02 0073 C517 8E 6A 02 STX QPOSN ;(z preserved from INX) MOS02 0040 C4ED v0E MOS02 0074 C51A D0 17 BNE CLCEX ;More to do?, then exit MOS02 0040 C4ED v0E MOS02 0075 C51C 24 D0 BIT STATS ;Disabled?, then go away MOS02 0040 C4ED v0E MOS02 0076 C51E 30 15 BMI DISABL MOS02 0040 C4ED v0E MOS02 0077 C520 70 05 BVS NOTCEB ;C.E. mode, then do swapping MOS02 0040 C4ED v0E MOS02 0078 C522 20 FA CC JSR RUNNER MOS02 0040 C4ED v0E MOS02 0079 C525 18 CLC MOS02 0040 C4ED v0E MOS02 0080 C526 60 RTS MOS02 0040 C4ED v0E MOS02 0081 C527 MOS02 0040 C4ED v0E MOS02 0082 C527 20 67 C5 NOTCEB JSR CSWAP MOS02 0040 C4ED v0E MOS02 0083 C52A 20 60 CD JSR OCSRDL MOS02 0040 C4ED v0E MOS02 0084 C52D 20 FA CC JSR RUNNER MOS02 0040 C4ED v0E MOS02 0085 C530 20 64 C5 NOTC10 JSR REXE10 MOS02 0040 C4ED v0E MOS02 0086 C533 18 CLCEX CLC MOS02 0040 C4ED v0E MOS02 0087 C534 60 RTS MOS02 0040 C4ED v0E MOS02 0088 C535 MOS02 0040 C4ED v0E MOS02 0089 C535 AC 5E 03 DISABL LDY JVEC +&01 ;Was this an SOH ? MOS02 0040 C4ED v0E MOS02 0090 C538 C0 C5 CPYIM /(SOH ) MOS02 0040 C4ED v0E MOS02 0091 C53A D0 F7 BNE CLCEX ;No?, then go home MOS02 0040 C4ED v0E MOS02 0092 C53C MOS02 0040 C4ED v0E MOS02 0093 C53C AA SOH TAX ;Yes, then (A)=Byte to be printed MOS02 0040 C4ED v0E MOS02 0094 C53D A5 D0 LDA STATS ;Is printing enabled ? MOS02 0040 C4ED v0E MOS02 0095 C53F 4A LSRA MOS02 0040 C4ED v0E MOS02 0096 C540 90 D0 BCC ACK MOS02 0040 C4ED v0E MOS02 0097 C542 8A TXA MOS02 0040 C4ED v0E MOS02 0098 C543 [ MOS125 = &FF MOS02 0040 C4ED v0E MOS02 0099 C543 | MOS02 0040 C4ED v0E MOS02 0100 C543 18 CLC ;C=0, prevent second printing; PRINT preserves flags MOS02 0040 C4ED v0E MOS02 0101 C544 ] MOS02 0040 C4ED v0E MOS02 0102 C544 4C 82 E1 JMP PRINT ;print character and return, setting c=0 (done by MOS) MOS02 0040 C4ED v0E MOS02 0103 C547 MOS02 0040 C4ED v0E MOS02 0104 C547 [ MOS125 = &FF MOS02 0040 C4ED v0E MOS02 0127 C547 | MOS02 0040 C4ED v0E MOS02 0128 C547 REXEC ;starting +2 from NOTC20; 1 spare byte MOS02 0040 C4ED v0E MOS02 0129 C547 8D 5E 03 STA JVEC +&01 MOS02 0040 C4ED v0E MOS02 0130 C54A A5 D0 LDA STATS MOS02 0040 C4ED v0E MOS02 0131 C54C 6A RORA ;Is printer module on? MOS02 0040 C4ED v0E MOS02 0132 C54D 98 TYA ;AND Is it range $08 to $0D ? (no longer include bell) MOS02 0040 C4ED v0E MOS02 0133 C54E 6A RORA ;+4 = +6 MOS02 0040 C4ED v0E MOS02 0134 C54F C9 84 CMPIM &84 MOS02 0040 C4ED v0E MOS02 0135 C551 49 FF EORIM &FF MOS02 0040 C4ED v0E MOS02 0136 C553 6A RORA MOS02 0040 C4ED v0E MOS02 0137 C554 69 43 ADCIM &43 MOS02 0040 C4ED v0E MOS02 0138 C556 98 TYA ;-2 = +4 MOS02 0040 C4ED v0E MOS02 0139 C557 ; MOS02 0040 C4ED v0E MOS02 0140 C557 24 D0 BIT STATS ;Execute routine - are we disabled ? MOS02 0040 C4ED v0E MOS02 0141 C559 30 24 BMI ACKQ ;Was it an ACK? (can't be an SOH cos she queues) MOS02 0040 C4ED v0E MOS02 0142 C55B ; MOS02 0040 C4ED v0E MOS02 0143 C55B 08 PHP ;and push c MOS02 0040 C4ED v0E MOS02 0144 C55C 20 FA CC JSR RUNNER ;Do the routine MOS02 0040 C4ED v0E MOS02 0145 C55F 28 PLP MOS02 0040 C4ED v0E MOS02 0146 C560 CSWDEX ;enter with C=printer module on ;-5 = -1; 4 spare bytes MOS02 0040 C4ED v0E MOS02 0147 C560 24 D0 BIT STATS ;Following preserves c MOS02 0148 C562 ^2E MOS02 0148 C562 50 AE BVC ACK ;Not C.E. so exit MOS02 MOS02 MOS02 MOS02 Acorn macro assembler Page 11 MOS02 VDU File - MOS02 MOS02 MOS02 0141 C559 v5B MOS02 0149 C564 20 70 CD REXE10 JSR OCSRWR ;Write output cursor MOS02 0141 C559 v5B MOS02 0150 C567 ] MOS02 0141 C559 v5B MOS02 0151 C567 MOS02 0141 C559 v5B MOS02 0152 C567 ;CSWAP - swap input and output text cursors MOS02 0141 C559 v5B MOS02 0153 C567 ; invert b1 of STATS MOS02 0141 C559 v5B MOS02 0154 C567 MOS02 0141 C559 v5B MOS02 0155 C567 08 CSWAP PHP ;Preserve carry MOS02 0141 C559 v5B MOS02 0156 C568 48 PHA MOS02 0141 C559 v5B MOS02 0157 C569 A2 18 LDXIM CSX-V MOS02 0141 C559 v5B MOS02 0158 C56B A0 64 LDYIM PCSX-V MOS02 0141 C559 v5B MOS02 0159 C56D 20 CC CD JSR SWAP2 MOS02 0141 C559 v5B MOS02 0160 C570 20 09 CF JSR TADDRY ;Address this point MOS02 0141 C559 v5B MOS02 0161 C573 20 D8 C9 JSR CSDSP MOS02 0141 C559 v5B MOS02 0162 C576 A5 D0 LDA STATS MOS02 0141 C559 v5B MOS02 0163 C578 49 02 EORIM &02 ;Invert bit 1 of STATS MOS02 0141 C559 v5B MOS02 0164 C57A 85 D0 STA STATS MOS02 0141 C559 v5B MOS02 0165 C57C 68 PLA MOS02 0141 C559 v5B MOS02 0166 C57D 28 PLP ;Restore c MOS02 0141 C559 v5B MOS02 0167 C57E 60 RTS MOS02 0141 C559 v5B MOS02 0168 C57F MOS02 0141 C559 v5B MOS02 0169 C57F ACKQ MOS02 0141 C559 v5B MOS02 0170 C57F ; C=0 => character not printable, C=1 => printable MOS02 0141 C559 v5B MOS02 0171 C57F 49 06 EORIM ACKASC ;Was it an ACK ? -- MOS02 0172 C581 D0 08 BNE VDURTS ;[not ACK] MOS02 0172 C581 v77 MOS02 0173 C583 ; MOS02 0172 C581 v77 MOS02 0174 C583 ; C=0 cos ACK not printable MOS02 0172 C581 v77 MOS02 0175 C583 A9 7F LDAIM &7F ;Yes?, then clear b7 of STATS MOS02 0172 C581 v77 MOS02 0176 C585 90 20 BCC STTAND ;always jump MOS02 0176 C585 v5F MOS02 0177 C587 MOS02 0176 C585 v5F MOS02 0178 C587 MOS02 0176 C585 v5F MOS02 0179 C587 MOS02 0176 C585 v5F MOS02 0180 C587 ;Test to see if printable ($20-$7E or $80-$FF) MOS02 0176 C585 v5F MOS02 0181 C587 ;Returns c=1 iff printable, c=0 otherwise MOS02 0176 C585 v5F MOS02 0182 C587 MOS02 0176 C585 v5F MOS02 0183 C587 MOS02 0176 C585 v5F MOS02 0184 C587 ;ANOMQ Returns z=0 iff cursors joined MOS02 0176 C585 v5F MOS02 0185 C587 MOS02 0176 C585 v5F MOS02 0186 C587 A5 D0 ANOMQ LDA STATS MOS02 0176 C585 v5F MOS02 0187 C589 29 20 ANDIM &20 ;Is b5 set ? (Answer to z) MOS02 0176 C585 v5F MOS02 0188 C58B VDURTS MOS02 0176 C585 v5F MOS02 0189 C58B 60 RTS ;Returns(A)=0 if b5 clear MOS02 0176 C585 v5F MOS02 0190 C58C MOS02 0176 C585 v5F MOS02 0191 C58C ;INDIVIDUAL ROUTINES MOS02 0176 C585 v5F MOS02 0192 C58C MOS02 0176 C585 v5F MOS02 0193 C58C ;NUL ($00) - do nothing MOS02 0176 C585 v5F MOS02 0194 C58C MOS02 0176 C585 v5F MOS02 0195 C58C ;Jump table points to ACK, an RTS, to save a byte MOS02 0176 C585 v5F MOS02 0196 C58C MOS02 0176 C585 v5F MOS02 0197 C58C ;SOH ($01) - Next char to printer MOS02 0176 C585 v5F MOS02 0198 C58C MOS02 0176 C585 v5F MOS02 0199 C58C ;This is taken care of above MOS02 0176 C585 v5F MOS02 0200 C58C MOS02 0176 C585 v5F MOS02 0201 C58C MOS02 0176 C585 v5F MOS02 0202 C58C ;SO ($0E) - Page mode on MOS02 0176 C585 v5F MOS02 0203 C58C MOS02 0176 C585 v5F MOS02 0204 C58C A0 00 SO LDYIM &00 ;Initialise LINES MOS02 0176 C585 v5F MOS02 0205 C58E 8C 69 02 STY LINES MOS02 0176 C585 v5F MOS02 0206 C591 A9 04 LDAIM &04 ;Set b2 of STATS MOS02 0176 C585 v5F MOS02 0207 C593 D0 07 BNE STTOR MOS02 0176 C585 v5F MOS02 0208 C595 MOS02 0176 C585 v5F MOS02 0209 C595 ;SI ($0F) - Page mode OFF MOS02 0176 C585 v5F MOS02 0210 C595 ; This is frigged below MOS02 0176 C585 v5F MOS02 0211 C595 MOS02 0176 C585 v5F MOS02 0212 C595 ;STX ($02) - Start printer MOS02 0176 C585 v5F MOS02 0213 C595 MOS02 0176 C585 v5F MOS02 0214 C595 20 3E E2 STX JSR mUPT ;inform network (A assumed to contain $02) MOS02 0176 C585 v5F MOS02 0215 C598 A9 94 LDAIM &94 ;Set bit 0 of STATS. This maps to $01 MOS02 0176 C585 v5F MOS02 0216 C59A MOS02 0176 C585 v5F MOS02 0217 C59A ;NAK ($15) - Turn VDU off MOS02 0176 C585 v5F MOS02 0218 C59A MOS02 0176 C585 v5F MOS02 0219 C59A 49 95 NAK EORIM &95 ;Set b7 of STATS. Map $15 to $80 MOS02 0176 C585 v5F MOS02 0220 C59C MOS02 0176 C585 v5F MOS02 0221 C59C 05 D0 STTOR ORA STATS MOS02 0254 C5C2 ^58 MOS02 0222 C59E D0 09 BNE STTEXT ;(branch always taken unless ORed with 0) MOS02 0254 C5C2 ^58 MOS02 0223 C5A0 MOS02 0254 C5C2 ^58 MOS02 0224 C5A0 MOS02 0254 C5C2 ^58 MOS02 0225 C5A0 ;ETX ($03) - Stop printer MOS02 0254 C5C2 ^58 MOS02 0226 C5A0 MOS02 0254 C5C2 ^58 MOS02 0227 C5A0 20 3E E2 ETX JSR mUPT ;inform network (A assumed to contain $03) MOS02 0254 C5C2 ^58 MOS02 0228 C5A3 A9 0A LDAIM &0A ;clear bit 0 of STATS. Maps $0A on to $FE MOS02 0254 C5C2 ^58 MOS02 0229 C5A5 MOS02 0254 C5C2 ^58 MOS02 0230 C5A5 49 F4 SI EORIM &F4 ;Clears b2 of STATS. Maps $0F on to $FB MOS02 0254 C5C2 ^58 MOS02 0231 C5A7 MOS02 0254 C5C2 ^58 MOS02 0232 C5A7 25 D0 STTAND AND STATS MOS02 0254 C5C2 ^58 MOS02 0233 C5A9 85 D0 STTEXT STA STATS MOS02 0254 C5C2 ^58 MOS02 0234 C5AB 60 EOTEXT RTS MOS02 0254 C5C2 ^58 MOS02 0235 C5AC MOS02 0254 C5C2 ^58 MOS02 0236 C5AC MOS02 0254 C5C2 ^58 MOS02 0237 C5AC ;EOT ($04) - Separate cursors MOS02 0254 C5C2 ^58 MOS02 0238 C5AC MOS02 0254 C5C2 ^58 MOS02 0239 C5AC AD 61 03 EOT LDA NPIX ;Is this a graphics mode ? MOS02 0254 C5C2 ^58 MOS02 0240 C5AF F0 FA BEQ EOTEXT ;NO, then return MOS02 0254 C5C2 ^58 MOS02 0241 C5B1 20 27 C9 JSR ETCA ;Redisplay old cursor MOS02 0254 C5C2 ^58 MOS02 0242 C5B4 A9 DF LDAIM &DF ;Clear b5 of STATS MOS02 0254 C5C2 ^58 MOS02 0243 C5B6 D0 EF BNE STTAND ;(branch always taken) MOS02 0254 C5C2 ^58 MOS02 0244 C5B8 MOS02 0254 C5C2 ^58 MOS02 0245 C5B8 ;ENQ ($05) - Join cursors MOS02 0254 C5C2 ^58 MOS02 0246 C5B8 ;Store & hide current cursor MOS02 0254 C5C2 ^58 MOS02 0247 C5B8 ;Set bit 5 of STATS MOS02 0254 C5C2 ^58 MOS02 0248 C5B8 MOS02 0254 C5C2 ^58 MOS02 0249 C5B8 AD 61 03 ENQ LDA NPIX ;Is this a graphics mode ? MOS02 0254 C5C2 ^58 MOS02 0250 C5BB F0 EE BEQ EOTEXT ;NO, then return MOS02 0254 C5C2 ^58 MOS02 0251 C5BD ;Access R10 OF 6845. NB cannot do this through CRTCP. MOS02 0254 C5C2 ^58 MOS02 0252 C5BD A9 20 LDAIM &20 ;Hide cursor MOS02 0254 C5C2 ^58 MOS02 0253 C5BF 20 2A C9 JSR ETCB ; Preserves flags MOS02 0254 C5C2 ^58 MOS02 0254 C5C2 D0 D8 BNE STTOR ;Set bit 5 of STATS, (A) preserved by ETCB -- MOS02 0255 C5C4 -- MOS02 0256 C5C4 ;ACK ($06) - Turn VDU drivers on again -- MOS02 0257 C5C4 ;Clear bit 7 of STATS -- MOS02 0258 C5C4 -- MOS02 0259 C5C4 ;Taken care of above -- MOS02 0260 C5C4 -- MOS02 0261 C5C4 ;BELL ($07) - Ring BELL -- MOS02 0262 C5C4 -- MOS02 0263 C5C4 ;The routine BELL is externally declared in file UADE90 -- MOS02 0264 C5C4 -- MOS02 0265 C5C4 ;Cursor primitives -- MOS02 0266 C5C4 -- MOS02 0267 C5C4 ;BS ($08) - Cursor left 1 character position -- MOS02 0268 C5C4 -- MOS02 0269 C5C4 20 87 C5 BS JSR ANOMQ MOS02 MOS02 MOS02 MOS02 Acorn macro assembler Page 12 MOS02 VDU File - MOS02 MOS02 -- MOS02 0270 C5C7 D0 55 BNE CSAL MOS02 0270 C5C7 v2A MOS02 0271 C5C9 MOS02 0270 C5C7 v2A MOS02 0272 C5C9 ;Cursor left MOS02 0270 C5C7 v2A MOS02 0273 C5C9 MOS02 0270 C5C7 v2A MOS02 0274 C5C9 CE 18 03 CSL DEC CSX MOS02 0270 C5C7 v2A MOS02 0275 C5CC AE 18 03 LDX CSX ;Over LH margin ? MOS02 0270 C5C7 v2A MOS02 0276 C5CF EC 08 03 CPX TWLCOL MOS02 0270 C5C7 v2A MOS02 0277 C5D2 30 19 BMI CSLC ;Yes, then up (see below) a line MOS02 0270 C5C7 v2A MOS02 0278 C5D4 AD 4A 03 LDA CSPOSN ;Move cursor left MOS02 0270 C5C7 v2A MOS02 0279 C5D7 38 SEC MOS02 0270 C5C7 v2A MOS02 0280 C5D8 ED 4F 03 SBC BYTCH MOS02 0270 C5C7 v2A MOS02 0281 C5DB AA TAX MOS02 0270 C5C7 v2A MOS02 0282 C5DC AD 4B 03 LDA CSPOSN +&01 MOS02 0270 C5C7 v2A MOS02 0283 C5DF E9 00 SBCIM &00 MOS02 0270 C5C7 v2A MOS02 0284 C5E1 CD 4E 03 CMP BEGSCN ;Wraparound ? MOS02 0270 C5C7 v2A MOS02 0285 C5E4 B0 03 BCS CSLA MOS02 0270 C5C7 v2A MOS02 0286 C5E6 6D 54 03 ADC BYTSCN ;Yes, then add screen MOS02 0270 C5C7 v2A MOS02 0287 C5E9 A8 CSLA TAY MOS02 0270 C5C7 v2A MOS02 0288 C5EA 4C CC C9 JMP CSDSPA MOS02 0270 C5C7 v2A MOS02 0289 C5ED MOS02 0270 C5C7 v2A MOS02 0290 C5ED AD 0A 03 CSLC LDA TWRCOL ;Put csr = RH edge MOS02 0270 C5C7 v2A MOS02 0291 C5F0 8D 18 03 STA CSX ;& fall through to ... MOS02 0270 C5C7 v2A MOS02 0292 C5F3 MOS02 0270 C5C7 v2A MOS02 0293 C5F3 ;Cursor up MOS02 0270 C5C7 v2A MOS02 0294 C5F3 MOS02 0270 C5C7 v2A MOS02 0295 C5F3 CE 69 02 CSU DEC LINES ;One more line to print before page mode occurs MOS02 0353 C65D ^14 MOS02 0296 C5F6 10 03 BPL CSUC MOS02 0353 C65D ^14 MOS02 0297 C5F8 EE 69 02 INC LINES ;At top of page, so don't go -ve! MOS02 0353 C65D ^14 MOS02 0298 C5FB AE 19 03 CSUC LDX CSY ;Cursor on top row ? MOS02 0353 C65D ^14 MOS02 0299 C5FE EC 0B 03 CPX TWTROW MOS02 0353 C65D ^14 MOS02 0300 C601 F0 06 BEQ CSUA ;Yes, then scroll MOS02 0353 C65D ^14 MOS02 0301 C603 CE 19 03 DEC CSY MOS02 0353 C65D ^14 MOS02 0302 C606 4C AE C6 JMP CSDA MOS02 0353 C65D ^14 MOS02 0303 C609 MOS02 0353 C65D ^14 MOS02 0304 C609 18 CSUA CLC MOS02 0353 C65D ^14 MOS02 0305 C60A 20 35 CD JSR ENSCRL ;Account for scroll disable MOS02 0353 C65D ^14 MOS02 0306 C60D A9 08 LDAIM &08 ;Test hard/soft flag MOS02 0353 C65D ^14 MOS02 0307 C60F 24 D0 BIT STATS MOS02 0353 C65D ^14 MOS02 0308 C611 D0 05 BNE CSUB ;S3 set, soft scroll MOS02 0353 C65D ^14 MOS02 0309 C613 20 6A C9 JSR HSCRDN ;S3 clear, hard scroll MOS02 0353 C65D ^14 MOS02 0310 C616 D0 03 BNE CSUD ; HSCRDN returns zero false MOS02 0353 C65D ^14 MOS02 0311 C618 20 93 CD CSUB JSR SSCRDN MOS02 0353 C65D ^14 MOS02 0312 C61B 4C AB C6 CSUD JMP CSDC MOS02 0353 C65D ^14 MOS02 0313 C61E A2 00 CSAL LDXIM &00 MOS02 0353 C65D ^14 MOS02 0314 C620 ; And fall through to MOS02 0353 C65D ^14 MOS02 0315 C620 MOS02 0353 C65D ^14 MOS02 0316 C620 ;Move graphics cursor 1 character - primitives. MOS02 0353 C65D ^14 MOS02 0317 C620 ;(X) = 0 if X cursor to be moved MOS02 0353 C65D ^14 MOS02 0318 C620 ; 2 if Y cursor to be moved MOS02 0353 C65D ^14 MOS02 0319 C620 ;Iff (X)=0, then if off window, LF/VT occurs MOS02 0353 C65D ^14 MOS02 0320 C620 ;If cursor crosses margin, then goes to opposite margin. MOS02 0353 C65D ^14 MOS02 0321 C620 ;Go down 1 character location MOS02 0353 C65D ^14 MOS02 0322 C620 MOS02 0353 C65D ^14 MOS02 0323 C620 86 DB GCSCHD STX ZTEMP +&01 ;Store offset MOS02 0353 C65D ^14 MOS02 0324 C622 20 1F D1 JSR WINDCS ;Window current cursor (result to ZTEMP) MOS02 0353 C65D ^14 MOS02 0325 C625 A6 DB LDX ZTEMP +&01 ;Subtract 8 from cursor MOS02 0353 C65D ^14 MOS02 0326 C627 38 SEC MOS02 0353 C65D ^14 MOS02 0327 C628 BD 24 03 LDAAX GCSIR MOS02 0353 C65D ^14 MOS02 0328 C62B E9 08 SBCIM &08 MOS02 0353 C65D ^14 MOS02 0329 C62D 9D 24 03 STAAX GCSIR MOS02 0353 C65D ^14 MOS02 0330 C630 B0 03 BCS GCSHDA MOS02 0353 C65D ^14 MOS02 0331 C632 DE 25 03 DECAX GCSIR+&01 MOS02 0353 C65D ^14 MOS02 0332 C635 A5 DA GCSHDA LDA ZTEMP ;Get window MOS02 0353 C65D ^14 MOS02 0333 C637 D0 1E BNE GCSHDB ;Out of window to begin with?, then skip MOS02 0353 C65D ^14 MOS02 0334 C639 20 1F D1 JSR WINDCS ;Window current point MOS02 0353 C65D ^14 MOS02 0335 C63C F0 19 BEQ GCSHDB ;Still inside? , then return MOS02 0353 C65D ^14 MOS02 0336 C63E A6 DB LDX ZTEMP +&01 ;Gone outside?, then go to high margin MOS02 0353 C65D ^14 MOS02 0337 C640 BD 04 03 LDAAX GWRCOL MOS02 0353 C65D ^14 MOS02 0338 C643 E0 01 CPXIM &01 ;Plot by X?, then back up 1 character MOS02 0353 C65D ^14 MOS02 0339 C645 B0 02 BCS GCSHDC MOS02 0353 C65D ^14 MOS02 0340 C647 E9 06 SBCIM &06 ;c=0. so subt. 7 to get char. just on screen MOS02 0353 C65D ^14 MOS02 0341 C649 9D 24 03 GCSHDC STAAX GCSIR MOS02 0353 C65D ^14 MOS02 0342 C64C BD 05 03 LDAAX GWRCOL+&01 MOS02 0353 C65D ^14 MOS02 0343 C64F E9 00 SBCIM &00 MOS02 0353 C65D ^14 MOS02 0344 C651 9D 25 03 STAAX GCSIR+&01 MOS02 0353 C65D ^14 MOS02 0345 C654 8A TXA ;Plot by X?, then go up a line as well MOS02 0353 C65D ^14 MOS02 0346 C655 F0 08 BEQ CSAU MOS02 0353 C65D ^14 MOS02 0347 C657 4C 7D CA GCSHDB JMP IEG MOS02 0419 C6D1 ^04 MOS02 0348 C65A MOS02 0419 C6D1 ^04 MOS02 0349 C65A MOS02 0419 C6D1 ^04 MOS02 0350 C65A ;VT ($0B) - Cursor up 1 character line MOS02 0419 C6D1 ^04 MOS02 0351 C65A MOS02 0419 C6D1 ^04 MOS02 0352 C65A 20 87 C5 VT JSR ANOMQ MOS02 0419 C6D1 ^04 MOS02 0353 C65D F0 94 BEQ CSU MOS02 0419 C6D1 ^04 MOS02 0354 C65F A2 02 CSAU LDXIM &02 MOS02 0419 C6D1 ^04 MOS02 0355 C661 D0 52 BNE GCSCHU ;(branch always taken) MOS02 0419 C6D1 ^04 MOS02 0356 C663 MOS02 0419 C6D1 ^04 MOS02 0357 C663 ;HT ($09) - Cursor right 1 character position MOS02 0419 C6D1 ^04 MOS02 0358 C663 MOS02 0419 C6D1 ^04 MOS02 0359 C663 A5 D0 HT LDA STATS ;Encode ANOMQ because this routine often referenced MOS02 0419 C6D1 ^04 MOS02 0360 C665 29 20 ANDIM &20 MOS02 0419 C6D1 ^04 MOS02 0361 C667 D0 4A BNE CSAR MOS02 0419 C6D1 ^04 MOS02 0362 C669 MOS02 0419 C6D1 ^04 MOS02 0363 C669 ;Cursor right MOS02 0419 C6D1 ^04 MOS02 0364 C669 MOS02 0419 C6D1 ^04 MOS02 0365 C669 AE 18 03 CSR LDX CSX ;Cursor over RH col ? MOS02 0419 C6D1 ^04 MOS02 0366 C66C EC 0A 03 CPX TWRCOL MOS02 0419 C6D1 ^04 MOS02 0367 C66F B0 12 BCS CSRC MOS02 0419 C6D1 ^04 MOS02 0368 C671 EE 18 03 INC CSX MOS02 0419 C6D1 ^04 MOS02 0369 C674 AD 4A 03 LDA CSPOSN MOS02 0419 C6D1 ^04 MOS02 0370 C677 6D 4F 03 ADC BYTCH ;Add no. bytes per char MOS02 0419 C6D1 ^04 MOS02 0371 C67A AA TAX MOS02 0419 C6D1 ^04 MOS02 0372 C67B AD 4B 03 LDA CSPOSN +&01 ;to posn. of csr. MOS02 0419 C6D1 ^04 MOS02 0373 C67E 69 00 ADCIM &00 ;sets n for test in CSDSPA MOS02 0419 C6D1 ^04 MOS02 0374 C680 4C CC C9 JMP CSDSPA MOS02 0419 C6D1 ^04 MOS02 0375 C683 AD 08 03 CSRC LDA TWLCOL ;Put csr = LH edge MOS02 0419 C6D1 ^04 MOS02 0376 C686 8D 18 03 STA CSX ;& fall through to ... MOS02 0419 C6D1 ^04 MOS02 0377 C689 MOS02 0419 C6D1 ^04 MOS02 0378 C689 ;Cursor down MOS02 0419 C6D1 ^04 MOS02 0379 C689 MOS02 0419 C6D1 ^04 MOS02 0380 C689 18 CSD CLC ;do not set LEDs on first test for page wait (MOS requirement) MOS02 0419 C6D1 ^04 MOS02 0381 C68A 20 C0 CA JSR PAGE ;Account for page mode MOS02 0419 C6D1 ^04 MOS02 0382 C68D AE 19 03 LDX CSY ;Is cursor off bottom? MOS02 0419 C6D1 ^04 MOS02 0383 C690 EC 09 03 CPX TWBROW MOS02 0419 C6D1 ^04 MOS02 0384 C693 B0 05 BCS CSDD ;Yes, then scroll MOS02 0419 C6D1 ^04 MOS02 0385 C695 EE 19 03 INC CSY ;No, then move down line MOS02 0419 C6D1 ^04 MOS02 0386 C698 90 14 BCC CSDA ;(branch always taken) MOS02 0419 C6D1 ^04 MOS02 0387 C69A MOS02 0419 C6D1 ^04 MOS02 0388 C69A 20 35 CD CSDD JSR ENSCRL ;Account for scroll disable MOS02 0419 C6D1 ^04 MOS02 0389 C69D A9 08 LDAIM &08 ;Test hard/soft flag MOS02 0419 C6D1 ^04 MOS02 0390 C69F 24 D0 BIT STATS MOS02 MOS02 MOS02 MOS02 Acorn macro assembler Page 13 MOS02 VDU File - MOS02 MOS02 MOS02 0419 C6D1 ^04 MOS02 0391 C6A1 D0 05 BNE CSDB MOS02 0419 C6D1 ^04 MOS02 0392 C6A3 20 7A C9 JSR HSCRUP ;No windows set, so use hard scroll MOS02 0419 C6D1 ^04 MOS02 0393 C6A6 D0 03 BNE CSDC ; HSCRUP unsets zero MOS02 0419 C6D1 ^04 MOS02 0394 C6A8 20 00 CE CSDB JSR SSCRUP ;Windows set, so use soft scroll MOS02 0419 C6D1 ^04 MOS02 0395 C6AB 20 AC CE CSDC JSR CLTLIN ;Clear the line on which CSY lies MOS02 0419 C6D1 ^04 MOS02 0396 C6AE 20 09 CF CSDA JSR TADDRY ;address the cursor, point guaranteed in window MOS02 0419 C6D1 ^04 MOS02 0397 C6B1 90 7E BCC FSD ;and display it (TADDRY returns carry clear) MOS02 0397 C6B1 v01 MOS02 0398 C6B3 A2 00 CSAR LDXIM &00 MOS02 0397 C6B1 v01 MOS02 0399 C6B5 ; And fall through to MOS02 0397 C6B1 v01 MOS02 0400 C6B5 MOS02 0397 C6B1 v01 MOS02 0401 C6B5 ;Move graphics cursor 1 character - primitives. MOS02 0397 C6B1 v01 MOS02 0402 C6B5 ;(X) = 0 if Y cursor to be moved MOS02 0397 C6B1 v01 MOS02 0403 C6B5 ; 2 if X cursor to be moved MOS02 0397 C6B1 v01 MOS02 0404 C6B5 ;Iff (X)=0, then if off window, LF/VT occurs MOS02 0397 C6B1 v01 MOS02 0405 C6B5 ;If cursor crosses margin, then goes to opposite margin. MOS02 0397 C6B1 v01 MOS02 0406 C6B5 MOS02 0397 C6B1 v01 MOS02 0407 C6B5 86 DB GCSCHU STX ZTEMP +&01 ;Store offset MOS02 0397 C6B1 v01 MOS02 0408 C6B7 20 1F D1 JSR WINDCS ;Window current cursor (result to ZTEMP) MOS02 0397 C6B1 v01 MOS02 0409 C6BA A6 DB LDX ZTEMP +&01 ;Add 8 to cursor MOS02 0397 C6B1 v01 MOS02 0410 C6BC 18 CLC MOS02 0397 C6B1 v01 MOS02 0411 C6BD BD 24 03 LDAAX GCSIR MOS02 0397 C6B1 v01 MOS02 0412 C6C0 69 08 ADCIM &08 MOS02 0397 C6B1 v01 MOS02 0413 C6C2 9D 24 03 STAAX GCSIR MOS02 0397 C6B1 v01 MOS02 0414 C6C5 90 03 BCC GCSHUA MOS02 0397 C6B1 v01 MOS02 0415 C6C7 FE 25 03 INCAX GCSIR+&01 MOS02 0397 C6B1 v01 MOS02 0416 C6CA A5 DA GCSHUA LDA ZTEMP ;Get window MOS02 0397 C6B1 v01 MOS02 0417 C6CC D0 89 BNE GCSHDB ;Out of window to begin with?, then skip MOS02 0397 C6B1 v01 MOS02 0418 C6CE 20 1F D1 JSR WINDCS ;Window current point MOS02 0397 C6B1 v01 MOS02 0419 C6D1 F0 84 BEQ GCSHDB ;Still inside? , then return MOS02 0397 C6B1 v01 MOS02 0420 C6D3 A6 DB LDX ZTEMP +&01 ;Gone outside?, then go to low margin MOS02 0397 C6B1 v01 MOS02 0421 C6D5 BD 00 03 LDAAX GWLCOL MOS02 0397 C6B1 v01 MOS02 0422 C6D8 E0 01 CPXIM &01 ;Plot by Y?, then go up a line MOS02 0397 C6B1 v01 MOS02 0423 C6DA 90 02 BCC GCSHUC MOS02 0397 C6B1 v01 MOS02 0424 C6DC 69 06 ADCIM &06 ;c=1, so add 7 to get char. just on screen MOS02 0397 C6B1 v01 MOS02 0425 C6DE 9D 24 03 GCSHUC STAAX GCSIR MOS02 0397 C6B1 v01 MOS02 0426 C6E1 BD 01 03 LDAAX GWLCOL+&01 MOS02 0397 C6B1 v01 MOS02 0427 C6E4 69 00 ADCIM &00 MOS02 0397 C6B1 v01 MOS02 0428 C6E6 9D 25 03 STAAX GCSIR+&01 MOS02 0397 C6B1 v01 MOS02 0429 C6E9 8A TXA ;Plot by X? MOS02 0397 C6B1 v01 MOS02 0430 C6EA F0 08 BEQ CSAD ;Yes?, then go down a line as well MOS02 0397 C6B1 v01 MOS02 0431 C6EC 4C 7D CA JMP IEG ;No?, then exit MOS02 0397 C6B1 v01 MOS02 0432 C6EF MOS02 0397 C6B1 v01 MOS02 0433 C6EF MOS02 0397 C6B1 v01 MOS02 0434 C6EF ;LF ($0A) - Cursor down 1 character line MOS02 0397 C6B1 v01 MOS02 0435 C6EF MOS02 0397 C6B1 v01 MOS02 0436 C6EF 20 87 C5 LF JSR ANOMQ MOS02 0397 C6B1 v01 MOS02 0437 C6F2 F0 95 BEQ CSD MOS02 0397 C6B1 v01 MOS02 0438 C6F4 A2 02 CSAD LDXIM &02 MOS02 0397 C6B1 v01 MOS02 0439 C6F6 4C 20 C6 JMP GCSCHD MOS02 0397 C6B1 v01 MOS02 0440 C6F9 MOS02 0397 C6B1 v01 MOS02 0441 C6F9 ;FS ($1C) Define text area MOS02 0397 C6B1 v01 MOS02 0442 C6F9 MOS02 0397 C6B1 v01 MOS02 0443 C6F9 ;QEND-3 = L.H. margin = TWLCOL MOS02 0397 C6B1 v01 MOS02 0444 C6F9 ;QEND-2 = Bottom row = TWBROW MOS02 0397 C6B1 v01 MOS02 0445 C6F9 ;QEND-1 = R.H. margin = TWRCOL MOS02 0397 C6B1 v01 MOS02 0446 C6F9 ;QEND = Top row = TWTROW MOS02 0397 C6B1 v01 MOS02 0447 C6F9 MOS02 0397 C6B1 v01 MOS02 0448 C6F9 [ MOS125 = &FF MOS02 0397 C6B1 v01 MOS02 0464 C6F9 | MOS02 0397 C6B1 v01 MOS02 0465 C6F9 AE 55 03 FS LDX MODE MOS02 0397 C6B1 v01 MOS02 0466 C6FC AD 21 03 LDA QEND-&02 ;Do y co-ordinates. Get bottom (higher numbered) row MOS02 0397 C6B1 v01 MOS02 0467 C6FF CD 23 03 CMP QEND ;Top row above bottom ? MOS02 0397 C6B1 v01 MOS02 0468 C702 90 16 BCC FSF ;No?, then fail MOS02 0397 C6B1 v01 MOS02 0469 C704 DD E7 C3 CMPAX PROWS ;Is > max. no. rows? MOS02 0397 C6B1 v01 MOS02 0470 C707 F0 02 BEQ FSC MOS02 0397 C6B1 v01 MOS02 0471 C709 B0 09 BCS FSE ;Yes, then fail MOS02 0397 C6B1 v01 MOS02 0472 C70B AD 22 03 FSC LDA QEND-&01 ;Do x co-ordinates. Get RH margin MOS02 0397 C6B1 v01 MOS02 0473 C70E A8 TAY MOS02 0397 C6B1 v01 MOS02 0474 C70F DD EF C3 CMPAX PCOLS ;Is > than max. cols? MOS02 0397 C6B1 v01 MOS02 0475 C712 F0 02 BEQ FSB MOS02 0397 C6B1 v01 MOS02 0476 C714 FSE MOS02 0397 C6B1 v01 MOS02 0477 C714 B0 74 BCS PRACX ;Yes, then fail MOS02 0397 C6B1 v01 MOS02 0478 C716 38 FSB SEC MOS02 0397 C6B1 v01 MOS02 0479 C717 ED 20 03 SBC QEND-&03 ;How many cols. wide ? MOS02 0397 C6B1 v01 MOS02 0480 C71A FSF MOS02 0397 C6B1 v01 MOS02 0481 C71A 90 6E BCC PRACX ;Fail if -ve no. cols. MOS02 0397 C6B1 v01 MOS02 0482 C71C ] MOS02 0397 C6B1 v01 MOS02 0483 C71C A8 TAY MOS02 0397 C6B1 v01 MOS02 0484 C71D 20 5C CA JSR SETPWW ;Set PWWDTH MOS02 0397 C6B1 v01 MOS02 0485 C720 A9 08 LDAIM &08 ;Set bit 3 for soft scrolling MOS02 0397 C6B1 v01 MOS02 0486 C722 20 9C C5 JSR STTOR MOS02 0397 C6B1 v01 MOS02 0487 C725 A2 20 LDXIM QEND-&03-V ;copy Q to TWxxxx MOS02 0397 C6B1 v01 MOS02 0488 C727 A0 08 LDYIM TWLCOL-V MOS02 0397 C6B1 v01 MOS02 0489 C729 20 40 D4 JSR COPYF MOS02 0397 C6B1 v01 MOS02 0490 C72C 20 EB CE JSR TADDR ;Is cursor still inside MOS02 0397 C6B1 v01 MOS02 0491 C72F B0 33 BCS RS ;No, then home cursor MOS02 0397 C6B1 v01 MOS02 0492 C731 4C D8 C9 FSD JMP CSDSP MOS02 0603 C7AD ^02 MOS02 0493 C734 MOS02 0603 C7AD ^02 MOS02 0494 C734 RPXLXY MOS02 0603 C7AD ^02 MOS02 0495 C734 A0 03 LDYIM &03 ;~~~ Read pixel at (x,y) ~~~ MOS02 0603 C7AD ^02 MOS02 0496 C736 B1 F0 PRAAA LDAIY WARGS ;Copy (x,y) to RPXLWS ... MOS02 0603 C7AD ^02 MOS02 0497 C738 99 28 03 STAAY RPXLWS MOS02 0603 C7AD ^02 MOS02 0498 C73B 88 DEY MOS02 0603 C7AD ^02 MOS02 0499 C73C 10 F8 BPL PRAAA MOS02 0603 C7AD ^02 MOS02 0500 C73E A9 28 LDAIM RPXLWS-V ;Convert in internal co-ordinates MOS02 0603 C7AD ^02 MOS02 0501 C740 20 CF D7 JSR RPXLD ;Read pixel if extant MOS02 0603 C7AD ^02 MOS02 0502 C743 A0 04 LDYIM &04 ;Store in (XY) +4 MOS02 0603 C7AD ^02 MOS02 0503 C745 D0 3B BNE PRACB ;(branch always taken) MOS02 0603 C7AD ^02 MOS02 0504 C747 MOS02 0603 C7AD ^02 MOS02 0505 C747 [ MOS125 = &FF MOS02 0603 C7AD ^02 MOS02 0516 C747 ] MOS02 0603 C7AD ^02 MOS02 0517 C747 MOS02 0603 C7AD ^02 MOS02 0518 C747 ;FF ($0C) Form feed MOS02 0603 C7AD ^02 MOS02 0519 C747 MOS02 0603 C7AD ^02 MOS02 0520 C747 20 87 C5 FF JSR ANOMQ ;Cursors joined ? MOS02 0603 C7AD ^02 MOS02 0521 C74A D0 78 BNE FFANOM ;Yes, then clear graphics area MOS02 0603 C7AD ^02 MOS02 0522 C74C A5 D0 LDA STATS ;Window set ? MOS02 0603 C7AD ^02 MOS02 0523 C74E 29 08 ANDIM &08 ;Test bit 3 of STATS MOS02 0603 C7AD ^02 MOS02 0524 C750 [ MOS125 = &FF MOS02 0603 C7AD ^02 MOS02 0527 C750 | MOS02 0603 C7AD ^02 MOS02 0528 C750 F0 64 BEQ FFC ;Clear?, then fast clear MOS02 0603 C7AD ^02 MOS02 0529 C752 ] MOS02 0603 C7AD ^02 MOS02 0530 C752 AE 0B 03 FFA LDX TWTROW ;Initialise cursor to top row MOS02 0603 C7AD ^02 MOS02 0531 C755 8E 19 03 FFB STX CSY ;Clear this line MOS02 0603 C7AD ^02 MOS02 0532 C758 20 AC CE JSR CLTLIN MOS02 0603 C7AD ^02 MOS02 0533 C75B AE 19 03 LDX CSY ;Move down a line MOS02 0603 C7AD ^02 MOS02 0534 C75E EC 09 03 CPX TWBROW ;On the bottom ? MOS02 0603 C7AD ^02 MOS02 0535 C761 E8 INX MOS02 0603 C7AD ^02 MOS02 0536 C762 90 F1 BCC FFB ;(INX preserves c) MOS02 0603 C7AD ^02 MOS02 0537 C764 MOS02 0603 C7AD ^02 MOS02 0538 C764 ;& fall through to MOS02 MOS02 MOS02 MOS02 Acorn macro assembler Page 14 MOS02 VDU File - MOS02 MOS02 MOS02 0603 C7AD ^02 MOS02 0539 C764 MOS02 0603 C7AD ^02 MOS02 0540 C764 MOS02 0603 C7AD ^02 MOS02 0541 C764 ;RS ($1E) Home character cursor MOS02 0603 C7AD ^02 MOS02 0542 C764 MOS02 0603 C7AD ^02 MOS02 0543 C764 20 87 C5 RS JSR ANOMQ MOS02 0603 C7AD ^02 MOS02 0544 C767 F0 22 BEQ RSA MOS02 0603 C7AD ^02 MOS02 0545 C769 [ MOS125 = &FF MOS02 0603 C7AD ^02 MOS02 0547 C769 | MOS02 0603 C7AD ^02 MOS02 0548 C769 ;RSAN Anomalous cursor home MOS02 0603 C7AD ^02 MOS02 0549 C769 MOS02 0603 C7AD ^02 MOS02 0550 C769 A2 06 RSAN LDXIM GWTROW-V ;Copy GWLCOL to GCSIR MOS02 0603 C7AD ^02 MOS02 0551 C76B A0 26 LDYIM GCSIY-V MOS02 0603 C7AD ^02 MOS02 0552 C76D 20 38 D4 JSR COPY2 ;Copy 4 bytes of RAM saves 2 bytes of ROM MOS02 0603 C7AD ^02 MOS02 0553 C770 MOS02 0603 C7AD ^02 MOS02 0554 C770 ;& fall through to ... MOS02 0603 C7AD ^02 MOS02 0555 C770 MOS02 0603 C7AD ^02 MOS02 0556 C770 MOS02 0603 C7AD ^02 MOS02 0557 C770 ;CRAN Anomalous carriage return MOS02 0603 C7AD ^02 MOS02 0558 C770 MOS02 0603 C7AD ^02 MOS02 0559 C770 A2 00 CRAN LDXIM GWLCOL-V ;Copy GWLCOL to GCSIX MOS02 0603 C7AD ^02 MOS02 0560 C772 A0 24 LDYIM GCSIX-V MOS02 0603 C7AD ^02 MOS02 0561 C774 20 38 D4 JSR COPY2 MOS02 0603 C7AD ^02 MOS02 0562 C777 4C 7D CA JMP IEG MOS02 0603 C7AD ^02 MOS02 0563 C77A MOS02 0603 C7AD ^02 MOS02 0564 C77A RPALET MOS02 0603 C7AD ^02 MOS02 0565 C77A 2D 60 03 AND NCOLOR ;Read parrot MOS02 0603 C7AD ^02 MOS02 0566 C77D AA TAX MOS02 0603 C7AD ^02 MOS02 0567 C77E BD 6F 03 LDAAX PARROT MOS02 0603 C7AD ^02 MOS02 0568 C781 C8 PRACA INY MOS02 0603 C7AD ^02 MOS02 0569 C782 91 F0 PRACB STAIY WARGS MOS02 0603 C7AD ^02 MOS02 0570 C784 A9 00 LDAIM &00 MOS02 0603 C7AD ^02 MOS02 0571 C786 C0 04 CPYIM &04 MOS02 0603 C7AD ^02 MOS02 0572 C788 D0 F7 BNE PRACA MOS02 0603 C7AD ^02 MOS02 0573 C78A 60 PRACX RTS MOS02 0603 C7AD ^02 MOS02 0574 C78B ] MOS02 0603 C7AD ^02 MOS02 0575 C78B MOS02 0603 C7AD ^02 MOS02 0576 C78B 8D 23 03 RSA STA QEND MOS02 0603 C7AD ^02 MOS02 0577 C78E 8D 22 03 STA QEND-&01 MOS02 0603 C7AD ^02 MOS02 0578 C791 MOS02 0603 C7AD ^02 MOS02 0579 C791 ;& fall through to .... MOS02 0603 C7AD ^02 MOS02 0580 C791 MOS02 0603 C7AD ^02 MOS02 0581 C791 ;US ($1F) Move text csr to x,y MOS02 0603 C7AD ^02 MOS02 0582 C791 MOS02 0603 C7AD ^02 MOS02 0583 C791 ;Put cursor to (x,y), where MOS02 0603 C7AD ^02 MOS02 0584 C791 ;x in QEND-1 & y in QEND MOS02 0603 C7AD ^02 MOS02 0585 C791 ;If illegal, leave cursor alone MOS02 0603 C7AD ^02 MOS02 0586 C791 MOS02 0603 C7AD ^02 MOS02 0587 C791 20 87 C5 US JSR ANOMQ ;Cursors joined ? MOS02 0603 C7AD ^02 MOS02 0588 C794 D0 F4 BNE PRACX ;Yes, then skip MOS02 0603 C7AD ^02 MOS02 0589 C796 20 AF C7 JSR USAF ;Remember current cursor MOS02 0603 C7AD ^02 MOS02 0590 C799 18 CLC MOS02 0603 C7AD ^02 MOS02 0591 C79A AD 22 03 LDA QEND-&01 ;Add offset to x posn MOS02 0603 C7AD ^02 MOS02 0592 C79D 6D 08 03 ADC TWLCOL MOS02 0603 C7AD ^02 MOS02 0593 C7A0 8D 18 03 STA CSX MOS02 0603 C7AD ^02 MOS02 0594 C7A3 AD 23 03 LDA QEND ;Add offset to y posn MOS02 0603 C7AD ^02 MOS02 0595 C7A6 18 CLC MOS02 0603 C7AD ^02 MOS02 0596 C7A7 6D 0B 03 ADC TWTROW MOS02 0603 C7AD ^02 MOS02 0597 C7AA [ MOS125 = &FF MOS02 0603 C7AD ^02 MOS02 0600 C7AA | MOS02 0603 C7AD ^02 MOS02 0601 C7AA 20 E8 CE JSR SYTADD ;Attempt to posn. csr MOS02 0603 C7AD ^02 MOS02 0602 C7AD ] MOS02 0603 C7AD ^02 MOS02 0603 C7AD 90 82 BCC FSD ;to a JMP CSDSP MOS02 0521 C74A v07 MOS02 0604 C7AF MOS02 0521 C74A v07 MOS02 0605 C7AF A2 18 USAF LDXIM CSX-V MOS02 0521 C74A v07 MOS02 0606 C7B1 A0 28 LDYIM USWS-V MOS02 0521 C74A v07 MOS02 0607 C7B3 4C CC CD JMP SWAP2 MOS02 0521 C74A v07 MOS02 0608 C7B6 MOS02 0521 C74A v07 MOS02 0609 C7B6 [ MOS125 = &FF MOS02 0521 C74A v07 MOS02 0610 C7B6 | MOS02 0521 C74A v07 MOS02 0611 C7B6 FFC MOS02 0521 C74A v07 MOS02 0612 C7B6 4C 9D CB JMP CLATXT ;Clear?, then fast clear MOS02 0521 C74A v07 MOS02 0613 C7B9 ] MOS02 0521 C74A v07 MOS02 0614 C7B9 MOS02 0521 C74A v07 MOS02 0615 C7B9 ;CR ($0D) Carriage return MOS02 0521 C74A v07 MOS02 0616 C7B9 MOS02 0521 C74A v07 MOS02 0617 C7B9 20 87 C5 CR JSR ANOMQ MOS02 0521 C74A v07 MOS02 0618 C7BC [ MOS125 = &FF MOS02 0521 C74A v07 MOS02 0621 C7BC | MOS02 0521 C74A v07 MOS02 0622 C7BC D0 B2 BNE CRAN MOS02 0521 C74A v07 MOS02 0623 C7BE ] MOS02 0521 C74A v07 MOS02 0624 C7BE 20 6E CE CRA JSR SSCRIM ;Position cursor to LH edge of window MOS02 0521 C74A v07 MOS02 0625 C7C1 4C AE C6 JMP CSDA ;Display cursor & TADDR MOS02 0521 C74A v07 MOS02 0626 C7C4 MOS02 0521 C74A v07 MOS02 0627 C7C4 LNK MOS03 MOS02 0521 C74A v07 MOS03 0001 C7C4 MOS02 0521 C74A v07 MOS03 0002 C7C4 TTL VDU File - MOS03 MOS02 0521 C74A v07 MOS03 0003 C7C4 OPT MOS03 MOS03 MOS03 MOS03 MOS03 Acorn macro assembler Page 15 MOS03 VDU File - MOS03 MOS03 MOS02 0521 C74A v07 MOS03 0004 C7C4 MOS02 0521 C74A v07 MOS03 0005 C7C4 ;Last revision 15/06/82 MOS02 0521 C74A v07 MOS03 0006 C7C4 MOS02 0521 C74A v07 MOS03 0007 C7C4 ;15/06/82 Route ALL unknown plot commands thru VDUVEC, even in text modes MOS02 0521 C74A v07 MOS03 0008 C7C4 ;02/06/82 ETB mod to redef of ASCII MOS02 0521 C74A v07 MOS03 0009 C7C4 ;27/05/82 DCC (programme palette) recoded MOS02 0521 C74A v07 MOS03 0010 C7C4 ;05/05/82 Delete anomalous TAB MOS02 0521 C74A v07 MOS03 0011 C7C4 ; Move NAK to MOS02 MOS02 0521 C74A v07 MOS03 0012 C7C4 ;01/05/82 Recoded to allow for forward queueing & change in variable order MOS02 0521 C74A v07 MOS03 0013 C7C4 ;24/04/82 ETB Function 1 (hide/display cursor) coded MOS02 0521 C74A v07 MOS03 0014 C7C4 ;19/04/82 DCC & DCCB moved for byte saving MOS02 0521 C74A v07 MOS03 0015 C7C4 ;15/04/82 NPCOL used to fix VDU 19,0,20,0,0,0 bug MOS02 0521 C74A v07 MOS03 0016 C7C4 ;24/03/82 DLE leaves graphics cursor alone MOS02 0521 C74A v07 MOS03 0017 C7C4 ; ETB to check if font exploded before reprogramming fonts 1-3 MOS02 0521 C74A v07 MOS03 0018 C7C4 ;21/03/82 DLE to account for non-zero origins MOS02 0521 C74A v07 MOS03 0019 C7C4 ;22/01/82 EIG to EIGABS in graphics window definition MOS02 0521 C74A v07 MOS03 0020 C7C4 ;07/01/82 Catch illegal VDU 23,n,.... commands MOS02 0521 C74A v07 MOS03 0021 C7C4 ;15/11/81 Vertical sync user adjustment (Paul) MOS02 0521 C74A v07 MOS03 0022 C7C4 MOS02 0521 C74A v07 MOS03 0023 C7C4 ;INDIVIDUAL ROUTINES MOS02 0521 C74A v07 MOS03 0024 C7C4 MOS02 0521 C74A v07 MOS03 0025 C7C4 MOS02 0521 C74A v07 MOS03 0026 C7C4 ;DLE ($10) Clear graphics area MOS02 0521 C74A v07 MOS03 0027 C7C4 MOS02 0521 C74A v07 MOS03 0028 C7C4 20 69 C7 FFANOM JSR RSAN -- MOS03 0029 C7C7 AD 61 03 DLE LDA NPIX ;Non-graphics ? -- MOS03 0030 C7CA F0 33 BEQ DLEX MOS03 0030 C7CA v4C MOS03 0031 C7CC AE 5A 03 LDX BGCOLF ;Clear to the background colour MOS03 0030 C7CA v4C MOS03 0032 C7CF AC 5C 03 LDY GPLBMD ;Use the background colour mode MOS03 0030 C7CA v4C MOS03 0033 C7D2 20 C5 D0 JSR SETZG ;Set this up MOS03 0030 C7CA v4C MOS03 0034 C7D5 A2 00 LDXIM GWLCOL-V ;Copy window params from GWTROW ... MOS03 0030 C7CA v4C MOS03 0035 C7D7 A0 28 LDYIM DLEWS-V ;Copy window parameters to DLEWS MOS03 0030 C7CA v4C MOS03 0036 C7D9 20 32 D4 JSR COPY8 MOS03 0030 C7CA v4C MOS03 0037 C7DC 38 SEC ;How many lines to do ? MOS03 0030 C7CA v4C MOS03 0038 C7DD AD 06 03 LDA GWTROW MOS03 0030 C7CA v4C MOS03 0039 C7E0 ED 02 03 SBC GWBROW MOS03 0030 C7CA v4C MOS03 0040 C7E3 A8 TAY MOS03 0030 C7CA v4C MOS03 0041 C7E4 C8 INY ;Increment this to distinguish between 0 & 255 MOS03 0030 C7CA v4C MOS03 0042 C7E5 8C 30 03 STY DLENLN ;Line counter MOS03 0030 C7CA v4C MOS03 0043 C7E8 A2 2C DLEA LDXIM DLEWS+&04-V ;Point to R.H. point, containing valid Y address MOS03 0030 C7CA v4C MOS03 0044 C7EA A0 28 LDYIM DLEWS-V ;Point to L.H. point, with irrelevant Y address MOS03 0030 C7CA v4C MOS03 0045 C7EC 20 42 D6 JSR HPLOTA ;Clear the current line MOS03 0030 C7CA v4C MOS03 0046 C7EF AD 2E 03 LDA DLEWS+&06 ;Decrement the current line number MOS03 0030 C7CA v4C MOS03 0047 C7F2 D0 03 BNE DLEB MOS03 0030 C7CA v4C MOS03 0048 C7F4 CE 2F 03 DEC DLEWS+&07 MOS03 0030 C7CA v4C MOS03 0049 C7F7 CE 2E 03 DLEB DEC DLEWS+&06 MOS03 0030 C7CA v4C MOS03 0050 C7FA CE 30 03 DEC DLENLN MOS03 0030 C7CA v4C MOS03 0051 C7FD D0 E9 BNE DLEA MOS03 0030 C7CA v4C MOS03 0052 C7FF 60 DLEX RTS -- MOS03 0053 C800 -- MOS03 0054 C800 ;DC1 ($11) Programme foreground -- MOS03 0055 C800 ;or background colours for text -- MOS03 0056 C800 -- MOS03 0057 C800 A0 00 DCA LDYIM &00 ;Used for storing -- MOS03 0058 C802 F0 02 BEQ DCABA ;(branch always taken) MOS03 0058 C802 v7D MOS03 0059 C804 MOS03 0058 C802 v7D MOS03 0060 C804 ;DC2 ($12) Programme foreground MOS03 0058 C802 v7D MOS03 0061 C804 ;or background colours for graphics MOS03 0058 C802 v7D MOS03 0062 C804 ;QEND-1=mode MOS03 0058 C802 v7D MOS03 0063 C804 ;QEND =logical colour MOS03 0058 C802 v7D MOS03 0064 C804 MOS03 0058 C802 v7D MOS03 0065 C804 A0 02 DCB LDYIM &02 MOS03 0058 C802 v7D MOS03 0066 C806 AD 23 03 DCABA LDA QEND ;Get logical colour -- MOS03 0067 C809 10 01 BPL DCABB ;Foreground ? MOS03 0067 C809 v7E MOS03 0068 C80B C8 INY ;No, then point to background locations MOS03 0067 C809 v7E MOS03 0069 C80C 2D 60 03 DCABB AND NCOLOR -- MOS03 0070 C80F 85 DA STA ZTEMP -- MOS03 0071 C811 AD 60 03 LDA NCOLOR ;Sneaky offset method -- MOS03 0072 C814 F0 1B BEQ DCABX ;Branch for TTX MOS03 0072 C814 v64 MOS03 0073 C816 29 07 ANDIM &07 ;to FCOLTB. A=table base MOS03 0072 C814 v64 MOS03 0074 C818 18 CLC MOS03 0072 C814 v64 MOS03 0075 C819 65 DA ADC ZTEMP ;(A) = offset +1 MOS03 0072 C814 v64 MOS03 0076 C81B AA TAX MOS03 0072 C814 v64 MOS03 0077 C81C BD 23 C4 LDAAX FCOLTB -&01 MOS03 0072 C814 v64 MOS03 0078 C81F 99 57 03 STAAY FTCOLF ;(Y) set above to 0..3 MOS03 0072 C814 v64 MOS03 0079 C822 [ MOS125 = &FF MOS03 0072 C814 v64 MOS03 0084 C822 | MOS03 0072 C814 v64 MOS03 0085 C822 98 TYA MOS03 0072 C814 v64 MOS03 0086 C823 4A LSRA ;Graphics? MOS03 0072 C814 v64 MOS03 0087 C824 D0 0C BNE DCBAC ;Yes, then set up GPLMDE MOS03 0072 C814 v64 MOS03 0088 C826 18 CLC ;A=0, C=0; SBC takes one's complement MOS03 0072 C814 v64 MOS03 0089 C827 ED 57 03 SBC FTCOLF ;No, then set ZORA and ZEOR MOS03 0072 C814 v64 MOS03 0090 C82A ] MOS03 0072 C814 v64 MOS03 0091 C82A 85 D3 STA ZEOR ;ZEOR = NOT foreground MOS03 0072 C814 v64 MOS03 0092 C82C 4D 58 03 EOR BTCOLF ;ZORA = ZEOR EOR back MOS03 0072 C814 v64 MOS03 0093 C82F 85 D2 STA ZORA MOS03 0072 C814 v64 MOS03 0094 C831 60 DCABX RTS MOS03 0087 C824 v73 MOS03 0095 C832 AD 22 03 DCBAC LDA QEND-&01 -- MOS03 0096 C835 99 59 03 STAAY GPLFMD -&02 ;Y=2 or 3 (for fore or background) mode -- MOS03 0097 C838 60 RTS -- MOS03 0098 C839 -- MOS03 0099 C839 A9 20 DCTTX LDAIM TTXBCL ;TTX load with a particular byte ($20) MOS03 0122 C84D ^6A MOS03 0100 C83B 8D 58 03 STA BTCOLF ;Used only for screen clears MOS03 0122 C84D ^6A MOS03 0101 C83E 60 RTS MOS03 0122 C84D ^6A MOS03 0102 C83F MOS03 0122 C84D ^6A MOS03 0103 C83F ;DC3 ($13) is below this routine MOS03 0122 C84D ^6A MOS03 0104 C83F MOS03 0122 C84D ^6A MOS03 0105 C83F MOS03 0122 C84D ^6A MOS03 0106 C83F ;DC4 ($14) Set default physical MOS03 0122 C84D ^6A MOS03 0107 C83F ;- logical relations MOS03 0122 C84D ^6A MOS03 0108 C83F ;Default back & foreground clrs MOS03 0122 C84D ^6A MOS03 0109 C83F MOS03 0122 C84D ^6A MOS03 0110 C83F A2 05 DCD LDXIM &05 ;Programme all full colours & modes to zero MOS03 0122 C84D ^6A MOS03 0111 C841 A9 00 LDAIM &00 MOS03 0122 C84D ^6A MOS03 0112 C843 9D 57 03 DCDA STAAX FTCOLF MOS03 0122 C84D ^6A MOS03 0113 C846 CA DEX MOS03 0122 C84D ^6A MOS03 0114 C847 10 FA BPL DCDA MOS03 0122 C84D ^6A MOS03 0115 C849 [ MOS125 = &FF MOS03 0122 C84D ^6A MOS03 0119 C849 | MOS03 0122 C84D ^6A MOS03 0120 C849 8A TXA ;A = &FF MOS03 0122 C84D ^6A MOS03 0121 C84A AE 60 03 LDX NCOLOR ;Set foreground colours & ZORA & ZEOR MOS03 0122 C84D ^6A MOS03 0122 C84D F0 EA BEQ DCTTX ;Branch for TTX -- MOS03 0123 C84F ] -- MOS03 0124 C84F E0 0F CPXIM &0F -- MOS03 0125 C851 D0 02 BNE DCDB MOS03 0125 C851 v7D MOS03 0126 C853 A9 3F LDAIM INVSXT ;Don't invert flashing bit MOS03 0125 C851 v7D MOS03 0127 C855 8D 57 03 DCDB STA FTCOLF -- MOS03 0128 C858 8D 59 03 STA FGCOLF -- MOS03 0129 C85B 49 FF EORIM &FF -- MOS03 0130 C85D 85 D2 STA ZORA -- MOS03 0131 C85F 85 D3 STA ZEOR MOS03 MOS03 MOS03 MOS03 Acorn macro assembler Page 16 MOS03 VDU File - MOS03 MOS03 -- MOS03 0132 C861 8E 1F 03 STX QEND-&04 ;set logical colour := NCOLOR -- MOS03 0133 C864 [ MOS125 = &FF -- MOS03 0166 C864 | -- MOS03 0167 C864 A9 07 LDAIM &07 -- MOS03 0168 C866 E0 03 CPXIM &03 ;How many colours? -- MOS03 0169 C868 90 0A BCC DCDLF MOS03 0169 C868 v75 MOS03 0170 C86A D0 0E BNE DCDLI MOS03 0170 C86A v71 MOS03 0171 C86C MOS03 0170 C86A v71 MOS03 0172 C86C ;4 colour, use shift right of $07 MOS03 0170 C86A v71 MOS03 0173 C86C MOS03 0170 C86A v71 MOS03 0174 C86C 20 7F C8 JSR DCDLJ ;Programme log.=3, phys.=7 MOS03 0170 C86A v71 MOS03 0175 C86F CE 1F 03 DEC QEND-&04 ;Programme log.=2, phys.=3 MOS03 0170 C86A v71 MOS03 0176 C872 A9 03 LDAIM &03 ;then 1=1, 0=0 MOS03 0170 C86A v71 MOS03 0177 C874 MOS03 0170 C86A v71 MOS03 0178 C874 ;2 colour (TTX also executes this rouine) MOS03 0170 C86A v71 MOS03 0179 C874 MOS03 0170 C86A v71 MOS03 0180 C874 20 7F C8 DCDLF JSR DCDLJ ;Programme log.=1, phys.=7 MOS03 0170 C86A v71 MOS03 0181 C877 CE 1F 03 DEC QEND-&04 MOS03 0170 C86A v71 MOS03 0182 C87A MOS03 0170 C86A v71 MOS03 0183 C87A ;16 colours - one to one MOS03 0170 C86A v71 MOS03 0184 C87A MOS03 0170 C86A v71 MOS03 0185 C87A DCDLI MOS03 0170 C86A v71 MOS03 0186 C87A MOS03 0170 C86A v71 MOS03 0187 C87A AD 1F 03 LDA QEND-&04 MOS03 0188 C87D ^75 MOS03 0188 C87D D0 F5 BNE DCDLF -- MOS03 0189 C87F 8D 20 03 DCDLJ STA QEND-&03 ;& fall through to .... -- MOS03 0190 C882 ] -- MOS03 0191 C882 -- MOS03 0192 C882 ;DC3 ($13) - Programme logical/ -- MOS03 0193 C882 ;physical colour relation -- MOS03 0194 C882 -- MOS03 0195 C882 ;Logical colour in QEND-4 -- MOS03 0196 C882 ;Physical colour in QEND-3 -- MOS03 0197 C882 -- MOS03 0198 C882 08 DCC PHP -- MOS03 0199 C883 78 SEI -- MOS03 0200 C884 AD 1F 03 LDA QEND-&04 ;Determine logical colour -- MOS03 0201 C887 2D 60 03 AND NCOLOR -- MOS03 0202 C88A AA TAX -- MOS03 0203 C88B AD 20 03 LDA QEND-&03 ;Get physical colour -- MOS03 0204 C88E 29 0F DCC1 ANDIM NPCOL ;mask off confusing bits MOS03 0301 C8CE ^3E MOS03 0205 C890 9D 6F 03 STAAX PARROT ;Write to list MOS03 0301 C8CE ^3E MOS03 0206 C893 [ MOS125 = &FF MOS03 0301 C8CE ^3E MOS03 0246 C893 | MOS03 0301 C8CE ^3E MOS03 0247 C893 86 FA STX SEIWKA MOS03 0301 C8CE ^3E MOS03 0248 C895 AD 60 03 LDA NCOLOR MOS03 0301 C8CE ^3E MOS03 0249 C898 4A LSRA MOS03 0301 C8CE ^3E MOS03 0250 C899 A8 TAY MOS03 0301 C8CE ^3E MOS03 0251 C89A 46 FA DCCALA LSR SEIWKA ;determine start position =Logi*16/(ncolor+1)*16 MOS03 0301 C8CE ^3E MOS03 0252 C89C 6A RORA MOS03 0301 C8CE ^3E MOS03 0253 C89D B0 FB BCS DCCALA MOS03 0301 C8CE ^3E MOS03 0254 C89F 1D 6F 03 ORAAX PARROT ;Get physical colour MOS03 0301 C8CE ^3E MOS03 0255 C8A2 49 07 EORIM &07 ;adjust value accounting for ULA bug MOS03 0301 C8CE ^3E MOS03 0256 C8A4 88 DEY ;Does NCOLOR=3? MOS03 0301 C8CE ^3E MOS03 0257 C8A5 MOS03 0301 C8CE ^3E MOS03 0258 C8A5 ;Interrupts already disabled shown by use of SEIWKA MOS03 0301 C8CE ^3E MOS03 0259 C8A5 [ &FF = &00 MOS03 0301 C8CE ^3E MOS03 0262 C8A5 ] MOS03 0301 C8CE ^3E MOS03 0263 C8A5 MOS03 0301 C8CE ^3E MOS03 0264 C8A5 ;Y=$FF 2 colours 8 writes MOS03 0301 C8CE ^3E MOS03 0265 C8A5 ;Y=$00 4 colours 4 writes MOS03 0301 C8CE ^3E MOS03 0266 C8A5 ;Y=$06 16 colours 1 write MOS03 0301 C8CE ^3E MOS03 0267 C8A5 MOS03 0301 C8CE ^3E MOS03 0268 C8A5 30 1B BMI DCCALB MOS03 0301 C8CE ^3E MOS03 0269 C8A7 D0 09 BNE DCCALC MOS03 0301 C8CE ^3E MOS03 0270 C8A9 5D D5 D8 EORAX DCCTAB +&05 MOS03 0301 C8CE ^3E MOS03 0271 C8AC 8D 21 FE DCCALD STA VPROC1 MOS03 0301 C8CE ^3E MOS03 0272 C8AF 49 10 EORIM &10 MOS03 0301 C8CE ^3E MOS03 0273 C8B1 C8 INY MOS03 0301 C8CE ^3E MOS03 0274 C8B2 8D 21 FE DCCALC STA VPROC1 MOS03 0301 C8CE ^3E MOS03 0275 C8B5 59 CF D8 EORAY DCCTAB -&01 MOS03 0301 C8CE ^3E MOS03 0276 C8B8 BE CF D8 LDXAY DCCTAB -&01 MOS03 0301 C8CE ^3E MOS03 0277 C8BB D0 EF BNE DCCALD MOS03 0301 C8CE ^3E MOS03 0278 C8BD 8D 49 02 STA VPREGB MOS03 0301 C8CE ^3E MOS03 0279 C8C0 [ &FF = &00 MOS03 0301 C8CE ^3E MOS03 0281 C8C0 ] MOS03 0301 C8CE ^3E MOS03 0282 C8C0 28 PLP MOS03 0301 C8CE ^3E MOS03 0283 C8C1 60 RTS MOS03 0301 C8CE ^3E MOS03 0284 C8C2 MOS03 0301 C8CE ^3E MOS03 0285 C8C2 A0 02 DCCALB LDYIM &02 MOS03 0301 C8CE ^3E MOS03 0286 C8C4 D0 E6 BNE DCCALD ;always branch MOS03 0301 C8CE ^3E MOS03 0287 C8C6 ] MOS03 0301 C8CE ^3E MOS03 0288 C8C6 MOS03 0301 C8CE ^3E MOS03 0289 C8C6 MOS03 0301 C8CE ^3E MOS03 0290 C8C6 ;OSWORD call to programme palette MOS03 0301 C8CE ^3E MOS03 0291 C8C6 MOS03 0301 C8CE ^3E MOS03 0292 C8C6 PRPAL MOS03 0301 C8CE ^3E MOS03 0293 C8C6 08 PHP MOS03 0301 C8CE ^3E MOS03 0294 C8C7 2D 60 03 AND NCOLOR ;Get logical colour MOS03 0301 C8CE ^3E MOS03 0295 C8CA AA TAX MOS03 0301 C8CE ^3E MOS03 0296 C8CB C8 INY ;(Y):=1 MOS03 0301 C8CE ^3E MOS03 0297 C8CC B1 F0 LDAIY WARGS ;Load physical colour MOS03 0301 C8CE ^3E MOS03 0298 C8CE [ MOS125 = &FF MOS03 0301 C8CE ^3E MOS03 0300 C8CE | MOS03 0301 C8CE ^3E MOS03 0301 C8CE B0 BE BCS DCC1 ;C=1 from OSB -- MOS03 0302 C8D0 ] -- MOS03 0303 C8D0 -- MOS03 0304 C8D0 ;SYN ($16) Change mode -- MOS03 0305 C8D0 -- MOS03 0306 C8D0 AD 23 03 SYN LDA QEND ;Get the mode -- MOS03 0307 C8D3 4C 10 CB JMP CHMODE -- MOS03 0308 C8D6 -- MOS03 0309 C8D6 ;ETB ($17) Programme soft font -- MOS03 0310 C8D6 ;Programme character font to user definition -- MOS03 0311 C8D6 ;Character to be programmed in Q+08, top row in Q+07 -- MOS03 0312 C8D6 ;through to bottom row in Q+00 -- MOS03 0313 C8D6 -- MOS03 0314 C8D6 AD 1B 03 ETB LDA QEND-&08 ;Is it the soft font ? -- MOS03 0315 C8D9 C9 20 CMPIM &20 ;Is it a printable character ? -- MOS03 0316 C8DB 90 38 BCC ETBD MOS03 0316 C8DB v47 MOS03 0317 C8DD [ MOS125 = &FF MOS03 0316 C8DB v47 MOS03 0355 C8DD | MOS03 0316 C8DB v47 MOS03 0356 C8DD 20 50 D0 JSR CHADDR MOS03 0316 C8DB v47 MOS03 0357 C8E0 ;returns X=font no., Y=(ZTEMPC+&01)=hard/soft page no. MOS03 0316 C8DB v47 MOS03 0358 C8E0 ;A=font flag mask, (ZTEMPC)=hard/soft character address MOS03 0316 C8DB v47 MOS03 0359 C8E0 2C 67 03 BIT FNTFLG ;flag set ? MOS03 0316 C8DB v47 MOS03 0360 C8E3 D0 1E BNE ETBB ;Yes?, then just copy defn. MOS03 0316 C8DB v47 MOS03 0361 C8E5 0D 67 03 ORA FNTFLG MOS03 0316 C8DB v47 MOS03 0362 C8E8 8D 67 03 STA FNTFLG MOS03 0316 C8DB v47 MOS03 0363 C8EB 84 DD STY ZTEMPB +&01 ;point to hard font MOS03 0316 C8DB v47 MOS03 0364 C8ED BC 67 03 LDYAX PGSFNT -&01 ;point to soft font MOS03 MOS03 MOS03 MOS03 Acorn macro assembler Page 17 MOS03 VDU File - MOS03 MOS03 MOS03 0316 C8DB v47 MOS03 0365 C8F0 84 DF STY ZTEMPC +&01 MOS03 0316 C8DB v47 MOS03 0366 C8F2 A6 DE LDX ZTEMPC +&00 ;save character offset MOS03 0316 C8DB v47 MOS03 0367 C8F4 A0 00 LDYIM &00 MOS03 0316 C8DB v47 MOS03 0368 C8F6 84 DC STY ZTEMPB +&00 ;align both pointers MOS03 0316 C8DB v47 MOS03 0369 C8F8 84 DE STY ZTEMPC +&00 MOS03 0316 C8DB v47 MOS03 0370 C8FA B1 DC ETBC LDAIY ZTEMPB ;copy from hard font MOS03 0316 C8DB v47 MOS03 0371 C8FC 91 DE STAIY ZTEMPC ;to soft font MOS03 0316 C8DB v47 MOS03 0372 C8FE C8 INY MOS03 0316 C8DB v47 MOS03 0373 C8FF D0 F9 BNE ETBC MOS03 0316 C8DB v47 MOS03 0374 C901 86 DE STX ZTEMPC +&00 ;restore character offset MOS03 0316 C8DB v47 MOS03 0375 C903 ETBB MOS03 0316 C8DB v47 MOS03 0376 C903 A0 07 LDYIM &07 ;& copy character into the font MOS03 0316 C8DB v47 MOS03 0377 C905 B9 1C 03 ETBA LDAAY QEND-&07 MOS03 0316 C8DB v47 MOS03 0378 C908 91 DE STAIY ZTEMPC MOS03 0316 C8DB v47 MOS03 0379 C90A 88 DEY MOS03 0316 C8DB v47 MOS03 0380 C90B 10 F8 BPL ETBA MOS03 0316 C8DB v47 MOS03 0381 C90D ] MOS03 0316 C8DB v47 MOS03 0382 C90D 60 ETCX RTS MOS03 0316 C8DB v47 MOS03 0383 C90E MOS03 0316 C8DB v47 MOS03 0384 C90E JMIV25 MOS03 0316 C8DB v47 MOS03 0385 C90E AD 1F 03 LDA PLMODE MOS03 0442 C965 ^27 MOS03 0386 C911 18 CLC MOS03 0442 C965 ^27 MOS03 0387 C912 ; C=0 MOS03 0442 C965 ^27 MOS03 0388 C912 JMIV23 ;C=1 MOS03 0442 C965 ^27 MOS03 0389 C912 6C 26 02 JMI VDUVEC MOS03 0442 C965 ^27 MOS03 0390 C915 ; MOS03 0442 C965 ^27 MOS03 0391 C915 C9 01 ETBD CMPIM &01 ;Valid command ? MOS03 0442 C965 ^27 MOS03 0392 C917 90 15 BCC ETD MOS03 0442 C965 ^27 MOS03 0393 C919 ; C=1 MOS03 0442 C965 ^27 MOS03 0394 C919 D0 F7 BNE JMIV23 ;No?, then jump indirect to user vector with C=1 MOS03 0442 C965 ^27 MOS03 0395 C91B ; MOS03 0442 C965 ^27 MOS03 0396 C91B 20 87 C5 JSR ANOMQ ;Anom. printing? ~~~ FUNCTION 1 Turn cursor on/off ~~~ MOS03 0442 C965 ^27 MOS03 0397 C91E D0 ED BNE ETCX ;Yes?, then don't do it MOS03 0442 C965 ^27 MOS03 0398 C920 A9 20 LDAIM &20 MOS03 0442 C965 ^27 MOS03 0399 C922 AC 1C 03 LDY QEND-&07 ;Hide(0) or display(1)? MOS03 0442 C965 ^27 MOS03 0400 C925 F0 03 BEQ ETCB MOS03 0442 C965 ^27 MOS03 0401 C927 AD 5F 03 ETCA LDA CSTEMP ;RESTORE CURSOR MOS03 0442 C965 ^27 MOS03 0402 C92A A0 0A ETCB LDYIM &0A MOS03 0442 C965 ^27 MOS03 0403 C92C D0 2D BNE CRTCPA ;Programme the 6845 without saving to CSTEMP MOS03 0442 C965 ^27 MOS03 0404 C92E MOS03 0442 C965 ^27 MOS03 0405 C92E AD 1D 03 ETD LDA QEND-&06 ;~~~ FUNCTION 0 Programme 6845 register #(Q+7) WITH (Q+6) ~~~ MOS03 0442 C965 ^27 MOS03 0406 C931 AC 1C 03 LDY QEND-&07 MOS03 0442 C965 ^27 MOS03 0407 C934 MOS03 0442 C965 ^27 MOS03 0408 C934 C0 07 CRTCP CPYIM &07 MOS03 0442 C965 ^27 MOS03 0409 C936 90 23 BCC CRTCPA ;[register<7, so not register 7 or 10] MOS03 0442 C965 ^27 MOS03 0410 C938 D0 03 BNE CRTCPC ;[not vertical sync position] MOS03 0442 C965 ^27 MOS03 0411 C93A MOS03 0442 C965 ^27 MOS03 0412 C93A 6D 90 02 ADC VERTIC ;apply user adjustment (c=1) MOS03 0442 C965 ^27 MOS03 0413 C93D MOS03 0442 C965 ^27 MOS03 0414 C93D C0 08 CRTCPC CPYIM &08 MOS03 0442 C965 ^27 MOS03 0415 C93F D0 07 BNE CRTCPD ;[not interlace mode register] MOS03 0442 C965 ^27 MOS03 0416 C941 09 00 ORAIM &00 ; interlace mode register MOS03 0442 C965 ^27 MOS03 0417 C943 30 03 BMI CRTCPD ;[do not alter interlace (probably teletext)] MOS03 0442 C965 ^27 MOS03 0418 C945 ; MOS03 0442 C965 ^27 MOS03 0419 C945 4D 91 02 EOR INTERL ;modify interlace MOS03 0442 C965 ^27 MOS03 0420 C948 C0 0A CRTCPD CPYIM &0A ;Cursor start register ? MOS03 0442 C965 ^27 MOS03 0421 C94A D0 0F BNE CRTCPA ;[not cursor start register] MOS03 0442 C965 ^27 MOS03 0422 C94C 8D 5F 03 STA CSTEMP ;Yes?, then record this for separate cursors MOS03 0442 C965 ^27 MOS03 0423 C94F A8 TAY MOS03 0442 C965 ^27 MOS03 0424 C950 A5 D0 LDA STATS ;Are cursors joined ? MOS03 0442 C965 ^27 MOS03 0425 C952 29 20 ANDIM &20 MOS03 0442 C965 ^27 MOS03 0426 C954 08 PHP ;(very nasty coding, but it is short) MOS03 0442 C965 ^27 MOS03 0427 C955 98 TYA MOS03 0442 C965 ^27 MOS03 0428 C956 A0 0A LDYIM &0A MOS03 0442 C965 ^27 MOS03 0429 C958 28 PLP MOS03 0442 C965 ^27 MOS03 0430 C959 D0 06 BNE CRTCPB ;Yes, then don't write to 6845 MOS03 0442 C965 ^27 MOS03 0431 C95B 8C 00 FE CRTCPA STY CRTCA ;Address said register MOS03 0442 C965 ^27 MOS03 0432 C95E 8D 01 FE STA CRTCD ;and store data therein MOS03 0442 C965 ^27 MOS03 0433 C961 60 CRTCPB RTS ;(Referenced from EM) MOS03 0442 C965 ^27 MOS03 0434 C962 MOS03 0442 C965 ^27 MOS03 0435 C962 ;ESC ($1B) does bugger all MOS03 0442 C965 ^27 MOS03 0436 C962 MOS03 0442 C965 ^27 MOS03 0437 C962 ;Jump table points to the RTS at ACK MOS03 0442 C965 ^27 MOS03 0438 C962 MOS03 0442 C965 ^27 MOS03 0439 C962 ;EM ($19) - Plotting MOS03 0442 C965 ^27 MOS03 0440 C962 MOS03 0442 C965 ^27 MOS03 0441 C962 AE 61 03 EM LDX NPIX ;Filter out non-graphics modes MOS03 0442 C965 ^27 MOS03 0442 C965 F0 A7 BEQ JMIV25 ;[text mode] -- MOS03 0443 C967 4C 70 D0 JMP EMA ;Jump to graphics routines -- MOS03 0444 C96A -- MOS03 0445 C96A ;Hardware scroll down -- MOS03 0446 C96A ;Doesn't touch cursor -- MOS03 0447 C96A -- MOS03 0448 C96A ; These routines return z=0 -- MOS03 0449 C96A -- MOS03 0450 C96A AE 50 03 HSCRDN LDX TOPSCN ;Subt. BYTROW from TOPSCN -- MOS03 0451 C96D AD 51 03 LDA TOPSCN+&01 -- MOS03 0452 C970 20 DE CB JSR SUBROW -- MOS03 0453 C973 B0 14 BCS NEWTOP ;Wraparound? No?, then done MOS03 0453 C973 v6B MOS03 0454 C975 6D 54 03 ADC BYTSCN ;Yes?, then add screen length MOS03 0453 C973 v6B MOS03 0455 C978 90 0F BCC NEWTOP ;(branch always taken) MOS03 0453 C973 v6B MOS03 0456 C97A MOS03 0453 C973 v6B MOS03 0457 C97A AE 50 03 HSCRUP LDX TOPSCN ;Add BYTROW to TOPSCN MOS03 0453 C973 v6B MOS03 0458 C97D AD 51 03 LDA TOPSCN+&01 MOS03 0453 C973 v6B MOS03 0459 C980 20 B1 CA JSR ADDROW MOS03 0453 C973 v6B MOS03 0460 C983 10 04 BPL NEWTOP ;Wraparound? MOS03 0453 C973 v6B MOS03 0461 C985 38 SEC MOS03 0453 C973 v6B MOS03 0462 C986 ED 54 03 SBC BYTSCN ;Yes?, then subtract off screen length MOS03 0453 C973 v6B MOS03 0463 C989 8D 51 03 NEWTOP STA TOPSCN +&01 -- MOS03 0464 C98C 8E 50 03 STX TOPSCN -- MOS03 0465 C98F A0 0C LDYIM &0C ;Prog. START of 6845 -- MOS03 0466 C991 D0 51 BNE AXCRTA ;(branch always taken) MOS03 0466 C991 v2E MOS03 0467 C993 MOS03 0466 C991 v2E MOS03 0468 C993 ;SUB ($1A) - Sets default text MOS03 0466 C991 v2E MOS03 0469 C993 ;& graphics windows. MOS03 0466 C991 v2E MOS03 0470 C993 ;Homes both cursors MOS03 0466 C991 v2E MOS03 0471 C993 ;Sets graphics origin to (0,0) MOS03 0466 C991 v2E MOS03 0472 C993 MOS03 0466 C991 v2E MOS03 0473 C993 ;Clear all window parameters, MOS03 0466 C991 v2E MOS03 0474 C993 ;Both cusors, & gr. origin MOS03 0466 C991 v2E MOS03 0475 C993 MOS03 0466 C991 v2E MOS03 0476 C993 A9 00 SUB LDAIM &00 MOS03 0466 C991 v2E MOS03 0477 C995 A2 2C LDXIM VDUWS+&04-GWLCOL ;THIS VALUE LIKELY TO CHANGE ! MOS03 0466 C991 v2E MOS03 0478 C997 9D 00 03 SUBA STAAX GWLCOL MOS03 0466 C991 v2E MOS03 0479 C99A CA DEX MOS03 0466 C991 v2E MOS03 0480 C99B 10 FA BPL SUBA MOS03 0466 C991 v2E MOS03 0481 C99D MOS03 0466 C991 v2E MOS03 0482 C99D ;Set other parameters MOS03 0466 C991 v2E MOS03 0483 C99D MOS03 0466 C991 v2E MOS03 0484 C99D AE 55 03 LDX MODE ;Get no. of char. cols. MOS03 0466 C991 v2E MOS03 0485 C9A0 BC EF C3 LDYAX PCOLS ;How many columns ? MOS03 MOS03 MOS03 MOS03 Acorn macro assembler Page 18 MOS03 VDU File - MOS03 MOS03 MOS03 0466 C991 v2E MOS03 0486 C9A3 8C 0A 03 STY TWRCOL ;Default text window MOS03 0466 C991 v2E MOS03 0487 C9A6 20 5C CA JSR SETPWW ;Set the text width MOS03 0466 C991 v2E MOS03 0488 C9A9 BC E7 C3 LDYAX PROWS ;Get no. char. rows MOS03 0466 C991 v2E MOS03 0489 C9AC 8C 09 03 STY TWBROW ;Default text window MOS03 0466 C991 v2E MOS03 0490 C9AF A0 03 LDYIM &03 ;GRAPHICS WINDOW Top row MOS03 0466 C991 v2E MOS03 0491 C9B1 8C 23 03 STY QEND MOS03 0466 C991 v2E MOS03 0492 C9B4 C8 INY MOS03 0466 C991 v2E MOS03 0493 C9B5 8C 21 03 STY QEND-&02 ;right column MOS03 0466 C991 v2E MOS03 0494 C9B8 CE 22 03 DEC QEND-&01 ;now = $FF MOS03 0466 C991 v2E MOS03 0495 C9BB CE 20 03 DEC QEND-&03 ;now = $FF MOS03 0466 C991 v2E MOS03 0496 C9BE 20 0D CA JSR CAN ;Transfer to window & convert co-ords MOS03 0466 C991 v2E MOS03 0497 C9C1 A9 F7 LDAIM &F7 ;Clear bit 3 of STATS (default windows set) MOS03 0466 C991 v2E MOS03 0498 C9C3 20 A7 C5 JSR STTAND MOS03 0466 C991 v2E MOS03 0499 C9C6 AE 50 03 LDX TOPSCN ;Programme cursor MOS03 0466 C991 v2E MOS03 0500 C9C9 AD 51 03 LDA TOPSCN+&01 ;to top L.H. byte MOS03 0466 C991 v2E MOS03 0501 C9CC 8E 4A 03 CSDSPA STX CSPOSN MOS03 0466 C991 v2E MOS03 0502 C9CF 8D 4B 03 STA CSPOSN +&01 MOS03 0466 C991 v2E MOS03 0503 C9D2 10 04 BPL CSDSP MOS03 0466 C991 v2E MOS03 0504 C9D4 38 SEC MOS03 0466 C991 v2E MOS03 0505 C9D5 ED 54 03 SBC BYTSCN MOS03 0466 C991 v2E MOS03 0506 C9D8 86 D8 CSDSP STX ZMEMT MOS03 0466 C991 v2E MOS03 0507 C9DA 85 D9 STA ZMEMT +&01 MOS03 0466 C991 v2E MOS03 0508 C9DC AE 4A 03 LDX CSPOSN MOS03 0466 C991 v2E MOS03 0509 C9DF AD 4B 03 LDA CSPOSN +&01 MOS03 0466 C991 v2E MOS03 0510 C9E2 A0 0E LDYIM &0E MOS03 0466 C991 v2E MOS03 0511 C9E4 48 AXCRTA PHA -- MOS03 0512 C9E5 AD 55 03 LDA MODE ;Is it teletext ? -- MOS03 0513 C9E8 C9 07 CMPIM &07 -- MOS03 0514 C9EA 68 PLA -- MOS03 0515 C9EB B0 10 BCS AXCRTB MOS03 0515 C9EB v6F MOS03 0516 C9ED 86 DA STX ZTEMP ;No?, then divide by 8 MOS03 0515 C9EB v6F MOS03 0517 C9EF 4A LSRA MOS03 0515 C9EB v6F MOS03 0518 C9F0 66 DA ROR ZTEMP MOS03 0515 C9EB v6F MOS03 0519 C9F2 4A LSRA MOS03 0515 C9EB v6F MOS03 0520 C9F3 66 DA ROR ZTEMP MOS03 0515 C9EB v6F MOS03 0521 C9F5 4A LSRA MOS03 0515 C9EB v6F MOS03 0522 C9F6 66 DA ROR ZTEMP MOS03 0515 C9EB v6F MOS03 0523 C9F8 A6 DA LDX ZTEMP MOS03 0515 C9EB v6F MOS03 0524 C9FA 4C FF C9 JMP AXCRTC MOS03 0515 C9EB v6F MOS03 0525 C9FD ;For TTX, fiddle the high address lines MOS03 0515 C9EB v6F MOS03 0526 C9FD [ MOS125 = &FF MOS03 0515 C9EB v6F MOS03 0529 C9FD | MOS03 0515 C9EB v6F MOS03 0530 C9FD ;on entry C=1, A=&7C..83, normal/wrapped screen address high byte, we need: MOS03 0515 C9EB v6F MOS03 0531 C9FD ;b5 = MA13 set, TTXVDU address mapping MOS03 0515 C9EB v6F MOS03 0532 C9FD ;b4 = MA12 clear, no HIRES wraparound MOS03 0515 C9EB v6F MOS03 0533 C9FD ;b3 = MA11 set, high RAM bank MOS03 0515 C9EB v6F MOS03 0534 C9FD ;b2 = MA10 indicates TTX wraparound, needed on-chip for cursor display MOS03 0515 C9EB v6F MOS03 0535 C9FD ;b7,6 unused MOS03 0515 C9EB v6F MOS03 0536 C9FD E9 54 AXCRTB SBCIM &54 ;map to &28..2F -- MOS03 0537 C9FF ] -- MOS03 0538 C9FF ;Write (A) to reg. (Y) of 6845 -- MOS03 0539 C9FF ;& (X) to reg. (Y)+1 -- MOS03 0540 C9FF -- MOS03 0541 C9FF 8C 00 FE AXCRTC STY CRTCA ;Access reg. (Y) -- MOS03 0542 CA02 8D 01 FE STA CRTCD ;Store MSB -- MOS03 0543 CA05 C8 INY ;Access reg. (Y)+1 -- MOS03 0544 CA06 8C 00 FE STY CRTCA -- MOS03 0545 CA09 8E 01 FE STX CRTCD ;Store LSB -- MOS03 0546 CA0C 60 RTS -- MOS03 0547 CA0D -- MOS03 0548 CA0D ;CAN ($18) Define graphics area -- MOS03 0549 CA0D -- MOS03 0550 CA0D ;QEND-7 = L.H. margin = GWLCOL Low byte 1st -- MOS03 0551 CA0D ;QEND-5 = Bottom row = GWBROW -- MOS03 0552 CA0D ;QEND-3 = R.H. margin = GWRCOL -- MOS03 0553 CA0D ;QEND-1 = Top row = GWTROW -- MOS03 0554 CA0D -- MOS03 0555 CA0D 20 55 CA CAN JSR CANB ;Swap graphics cursor with innocuous bytes in WS -- MOS03 0556 CA10 A2 1C LDXIM QEND-&07-V -- MOS03 0557 CA12 A0 2C LDYIM CDELTA-V -- MOS03 0558 CA14 20 C7 D3 JSR TRISA ;Calculate window differences to CDELTA -- MOS03 0559 CA17 0D 2D 03 ORA CDELTA+&01 ;(A) returns with CDELTA+3= DeltaY, so OR with DeltaX -- MOS03 0560 CA1A 30 39 BMI CANB ;If either is -ve, then illegal window MOS03 0560 CA1A v46 MOS03 0561 CA1C A2 20 LDXIM QEND-&03-V ;Convert window to Ico-ords MOS03 0560 CA1A v46 MOS03 0562 CA1E 20 5B D1 JSR EIGABS MOS03 0560 CA1A v46 MOS03 0563 CA21 A2 1C LDXIM QEND-&07-V MOS03 0560 CA1A v46 MOS03 0564 CA23 20 5B D1 JSR EIGABS MOS03 0560 CA1A v46 MOS03 0565 CA26 AD 1F 03 LDA QEND-&04 ;Are both lower margins +ve ? MOS03 0560 CA1A v46 MOS03 0566 CA29 0D 1D 03 ORA QEND-&06 MOS03 0560 CA1A v46 MOS03 0567 CA2C 30 27 BMI CANB ;No?, then illegal MOS03 0560 CA1A v46 MOS03 0568 CA2E AD 23 03 LDA QEND ;Is Y valid ? MOS03 0560 CA1A v46 MOS03 0569 CA31 D0 22 BNE CANB ;Only if MSB is zero MOS03 0560 CA1A v46 MOS03 0570 CA33 AE 55 03 LDX MODE ;Is X valid ? MOS03 0560 CA1A v46 MOS03 0571 CA36 AD 21 03 LDA QEND-&02 ;Divide by 8 & see if > no. of character cols MOS03 0560 CA1A v46 MOS03 0572 CA39 85 DA STA ZTEMP MOS03 0560 CA1A v46 MOS03 0573 CA3B AD 20 03 LDA QEND-&03 ;LSB of RH margin -1 MOS03 0560 CA1A v46 MOS03 0574 CA3E 46 DA LSR ZTEMP MOS03 0560 CA1A v46 MOS03 0575 CA40 6A RORA MOS03 0560 CA1A v46 MOS03 0576 CA41 46 DA LSR ZTEMP MOS03 0560 CA1A v46 MOS03 0577 CA43 D0 10 BNE CANB MOS03 0560 CA1A v46 MOS03 0578 CA45 6A RORA MOS03 0560 CA1A v46 MOS03 0579 CA46 4A LSRA MOS03 0560 CA1A v46 MOS03 0580 CA47 DD EF C3 CMPAX PCOLS MOS03 0560 CA1A v46 MOS03 0581 CA4A F0 02 BEQ CANA MOS03 0560 CA1A v46 MOS03 0582 CA4C 10 07 BPL CANB MOS03 0560 CA1A v46 MOS03 0583 CA4E A0 00 CANA LDYIM GWLCOL-V ;Copy to window MOS03 0560 CA1A v46 MOS03 0584 CA50 A2 1C LDXIM QEND-&07-V ;From Q MOS03 0560 CA1A v46 MOS03 0585 CA52 20 32 D4 JSR COPY8 MOS03 0560 CA1A v46 MOS03 0586 CA55 A2 10 CANB LDXIM GCSR-V ;Swap GCSR with CANWS, as EIGABS corrupts this -- MOS03 0587 CA57 A0 28 LDYIM CANWS-V -- MOS03 0588 CA59 4C D4 CD JMP SWAPF -- MOS03 0589 CA5C -- MOS03 0590 CA5C ;Set printer window width -- MOS03 0591 CA5C ;Char. width in A -- MOS03 0592 CA5C ;Mode in X -- MOS03 0593 CA5C -- MOS03 0594 CA5C C8 SETPWW INY -- MOS03 0595 CA5D 98 TYA -- MOS03 0596 CA5E A0 00 LDYIM &00 -- MOS03 0597 CA60 8C 4D 03 STY PWWDTH +&01 ;Clear MSB -- MOS03 0598 CA63 8D 4C 03 STA PWWDTH -- MOS03 0599 CA66 AD 4F 03 LDA BYTCH ;How many times to shift PWWDTH left ? -- MOS03 0600 CA69 4A LSRA -- MOS03 0601 CA6A F0 09 BEQ SETPWC ;TTX? MOS03 0601 CA6A v76 MOS03 0602 CA6C 0E 4C 03 SETPWA ASL PWWDTH MOS03 0601 CA6A v76 MOS03 0603 CA6F 2E 4D 03 ROL PWWDTH +&01 MOS03 0601 CA6A v76 MOS03 0604 CA72 4A LSRA MOS03 0601 CA6A v76 MOS03 0605 CA73 90 F7 BCC SETPWA MOS03 0601 CA6A v76 MOS03 0606 CA75 60 SETPWC RTS ;This used to be FSFAIL & ESCFL & ESCBB as well -- MOS03 0607 CA76 -- MOS03 0608 CA76 ;GS ($1D) Define graphics origin MOS03 MOS03 MOS03 MOS03 Acorn macro assembler Page 19 MOS03 VDU File - MOS03 MOS03 -- MOS03 0609 CA76 -- MOS03 0610 CA76 ;GSA Define graphics origin -- MOS03 0611 CA76 ;The co-ordinates are in external 16 bit space. This does not -- MOS03 0612 CA76 ;move the windows, but does move the graphics cursors -- MOS03 0613 CA76 -- MOS03 0614 CA76 A2 20 GS LDXIM QEND-&03-V -- MOS03 0615 CA78 A0 0C LDYIM ORG-V ;Copy the new origin (external co-ords) to ORGY.. -- MOS03 0616 CA7A 20 40 D4 JSR COPYF -- MOS03 0617 CA7D [ MOS125 = &FF -- MOS03 0638 CA7D | -- MOS03 0639 CA7D ;IEG Inverse of EIG. Converts Icursor to Ecursor -- MOS03 0640 CA7D -- MOS03 0641 CA7D A0 10 IEG LDYIM GCSR-V ;Copy GCSIY to GCSY -- MOS03 0642 CA7F 20 3E D4 JSR COPYFB -- MOS03 0643 CA82 A2 02 LDXIM &02 ;Convert y co-ordinates -- MOS03 0644 CA84 A0 02 LDYIM &02 ;by multiplying by 4 -- MOS03 0645 CA86 20 99 CA JSR IEGC -- MOS03 0646 CA89 A2 00 LDXIM &00 ;Convert x co-ordinates -- MOS03 0647 CA8B A0 05 LDYIM &05 ;By multiplying by 2 -- MOS03 0648 CA8D AD 61 03 LDA NPIX ;4, or 8, depending on (NPIX) -- MOS03 0649 CA90 88 IEGA DEY MOS03 0651 CA92 ^7C MOS03 0650 CA91 4A LSRA MOS03 0651 CA92 ^7C MOS03 0651 CA92 D0 FC BNE IEGA -- MOS03 0652 CA94 AD 56 03 LDA MEMODE ;Get memory map type -- MOS03 0653 CA97 F0 06 BEQ IEGE ;=0 if 20K mode in which case skip one multiplication MOS03 0653 CA97 v79 MOS03 0654 CA99 MOS03 0653 CA97 v79 MOS03 0655 CA99 1E 10 03 IEGC ASLAX GCSR MOS03 0659 CAA0 ^77 MOS03 0656 CA9C 3E 11 03 ROLAX GCSR+&01 MOS03 0659 CAA0 ^77 MOS03 0657 CA9F IEGE MOS03 0659 CAA0 ^77 MOS03 0658 CA9F 88 DEY MOS03 0659 CAA0 ^77 MOS03 0659 CAA0 D0 F7 BNE IEGC -- MOS03 0660 CAA2 38 SEC ;Now subtract off origin to give external co-ordinate -- MOS03 0661 CAA3 20 A7 CA JSR IEGD -- MOS03 0662 CAA6 E8 INX -- MOS03 0663 CAA7 BD 10 03 IEGD LDAAX GCSR -- MOS03 0664 CAAA FD 0C 03 SBCAX ORG -- MOS03 0665 CAAD 9D 10 03 STAAX GCSR -- MOS03 0666 CAB0 60 RTS -- MOS03 0667 CAB1 ] -- MOS03 0668 CAB1 LNK MOS04 -- MOS04 0001 CAB1 -- MOS04 0002 CAB1 TTL VDU File - MOS04 -- MOS04 0003 CAB1 OPT MOS04 MOS04 MOS04 MOS04 MOS04 Acorn macro assembler Page 20 MOS04 VDU File - MOS04 MOS04 -- MOS04 0004 CAB1 ;Last revision 02/06/82 -- MOS04 0005 CAB1 -- MOS04 0006 CAB1 ;02/06/82 Implode/Explode font change, RESET (fonts) changed -- MOS04 0007 CAB1 ;26/05/82 Replace table TBZTBX with LSRA -- MOS04 0008 CAB1 ;19/05/82 Compress PAGEE code -- MOS04 0009 CAB1 ;18/05/82 Conditional coding to remove bug from PAGE -- MOS04 0010 CAB1 ;01/05/82 Considerable recoding for new variable order & forward queueing -- MOS04 0011 CAB1 ;19/04/82 BYTE squashing -- MOS04 0012 CAB1 ;24/03/82 Add soft font implosion & explosion -- MOS04 0013 CAB1 ; Change refs. to BEGSCN+1 to BEGSCN -- MOS04 0014 CAB1 ;08/02/82 Remove initialisation of TRMCH -- MOS04 0015 CAB1 ;07/01/82 Remove initialisation of VDUVEC -- MOS04 0016 CAB1 ;16/11 Bug fix - page mode only at bottom line of window -- MOS04 0017 CAB1 ;14/11 Initialisation of DOTS removed -- MOS04 0018 CAB1 ;28/10 Initialisation of FNTFLG -- MOS04 0019 CAB1 -- MOS04 0020 CAB1 ;Get address of line below -- MOS04 0021 CAB1 -- MOS04 0022 CAB1 48 ADDROW PHA -- MOS04 0023 CAB2 8A TXA -- MOS04 0024 CAB3 18 CLC -- MOS04 0025 CAB4 6D 52 03 ADC BYTROW -- MOS04 0026 CAB7 AA TAX -- MOS04 0027 CAB8 68 PLA -- MOS04 0028 CAB9 6D 53 03 ADC BYTROW +&01 -- MOS04 0029 CABC 60 RTS -- MOS04 0030 CABD -- MOS04 0031 CABD ;Is page mode on ? -- MOS04 0032 CABD -- MOS04 0033 CABD ;CTRL and SHIFT keys pressed (c=1) -- MOS04 0034 CABD -- MOS04 0035 CABD 20 F1 CA PAGEF JSR PAGED ;reset LINES, N.B. does not corrupt c MOS04 0039 CAC5 ^76 MOS04 0036 CAC0 ; If c=1 => set both LEDs MOS04 0039 CAC5 ^76 MOS04 0037 CAC0 20 02 EA PAGE JSR MOSTST ;pause if CTRL and SHIFT keys pressed MOS04 0039 CAC5 ^76 MOS04 0038 CAC3 90 02 BCC PAGEE ;[CTRL not pressed] MOS04 0039 CAC5 ^76 MOS04 0039 CAC5 30 F6 BMI PAGEF ;[CTRL and SHIFT keys pressed ,c=1] MOS04 0038 CAC3 v7D MOS04 0040 CAC7 ; CTRL without SHIFT MOS04 0038 CAC3 v7D MOS04 0041 CAC7 MOS04 0038 CAC3 v7D MOS04 0042 CAC7 [ PAGEFX =0 ;TRUE if bug in page to be fixed MOS04 0038 CAC3 v7D MOS04 0043 CAC7 A5 D0 PAGEE LDA STATS -- MOS04 0044 CAC9 49 04 EORIM &04 ;invert page mode bit -- MOS04 0045 CACB 29 46 ANDIM &46 ;Exit if C.E. or scroll disabled, or not in page mode -- MOS04 0046 CACD D0 2A BNE PAGEX MOS04 0046 CACD v55 MOS04 0047 CACF | MOS04 0046 CACD v55 MOS04 0052 CACF ] MOS04 0046 CACD v55 MOS04 0053 CACF MOS04 0046 CACD v55 MOS04 0054 CACF AD 69 02 LDA LINES ;Is a page printed yet ? MOS04 0046 CACD v55 MOS04 0055 CAD2 30 22 BMI PAGEA ;If -ve, then reset (more down scrolls than up) MOS04 0046 CACD v55 MOS04 0056 CAD4 ; ensure on bottom line of text window MOS04 0046 CACD v55 MOS04 0057 CAD4 AD 19 03 LDA CSY MOS04 0046 CACD v55 MOS04 0058 CAD7 CD 09 03 CMP TWBROW MOS04 0046 CACD v55 MOS04 0059 CADA 90 1A BCC PAGEA ;[not on bottom line of text window] MOS04 0046 CACD v55 MOS04 0060 CADC ; deal with overlap MOS04 0046 CACD v55 MOS04 0061 CADC 4A LSRA MOS04 0046 CACD v55 MOS04 0062 CADD 4A LSRA MOS04 0046 CACD v55 MOS04 0063 CADE 38 SEC MOS04 0046 CACD v55 MOS04 0064 CADF 6D 69 02 ADC LINES MOS04 0046 CACD v55 MOS04 0065 CAE2 6D 0B 03 ADC TWTROW ;(c=0) MOS04 0046 CACD v55 MOS04 0066 CAE5 CD 09 03 CMP TWBROW MOS04 0046 CACD v55 MOS04 0067 CAE8 90 0C BCC PAGEA ;No, then continue MOS04 0046 CACD v55 MOS04 0068 CAEA 18 CLC ;do not set LEDs on first scroll test MOS04 0046 CACD v55 MOS04 0069 CAEB ;wait for shift key MOS04 0046 CACD v55 MOS04 0070 CAEB 20 02 EA PAGEC JSR MOSTST MOS04 0046 CACD v55 MOS04 0071 CAEE 38 SEC ;test LEDs on subsequent scroll tests MOS04 0046 CACD v55 MOS04 0072 CAEF 10 FA BPL PAGEC MOS04 0046 CACD v55 MOS04 0073 CAF1 A9 FF PAGED LDAIM &FF ;Reinitialise LINES MOS04 0046 CACD v55 MOS04 0074 CAF3 8D 69 02 STA LINES MOS04 0046 CACD v55 MOS04 0075 CAF6 EE 69 02 PAGEA INC LINES MOS04 0046 CACD v55 MOS04 0076 CAF9 60 PAGEX RTS -- MOS04 0077 CAFA -- MOS04 0078 CAFA ;INTIALISATION ROUTINE -- MOS04 0079 CAFA ;Initial mode in (A) -- MOS04 0080 CAFA -- MOS04 0081 CAFA 48 RESET PHA ;Push mode -- MOS04 0082 CAFB A2 7F LDXIM VEND-V ;Clear all variables -- MOS04 0083 CAFD A9 00 LDAIM &00 -- MOS04 0084 CAFF 85 D0 STA STATS -- MOS04 0085 CB01 9D FF 02 RESETA STAAX V-&01 MOS04 0087 CB05 ^7A MOS04 0086 CB04 CA DEX MOS04 0087 CB05 ^7A MOS04 0087 CB05 D0 FA BNE RESETA -- MOS04 0088 CB07 ; X=0 **** AND EQ status (used by FONT) **** -- MOS04 0089 CB07 20 FD CC JSR FONT ;Ensure font imploded -- MOS04 0090 CB0A 68 PLA ;Pull the mode back again -- MOS04 0091 CB0B A2 7F LDXIM &7F ;Initialise CHCSR to character for DEL -- MOS04 0092 CB0D 8E 66 03 STX CHCSR ;and fall through to ... -- MOS04 0093 CB10 -- MOS04 0094 CB10 ;MODE CHANGE -- MOS04 0095 CB10 -- MOS04 0096 CB10 2C 8E 02 CHMODE BIT MODEL ;adjust according to model -- MOS04 0097 CB13 30 02 BMI CHMOD1 ;[model B] MOS04 0097 CB13 v7D MOS04 0098 CB15 09 04 ORAIM &04 ;model A MOS04 0097 CB13 v7D MOS04 0099 CB17 29 07 CHMOD1 ANDIM &07 -- MOS04 0100 CB19 AA TAX -- MOS04 0101 CB1A 8E 55 03 STX MODE ;Initialise MODE -- MOS04 0102 CB1D BD 14 C4 LDAAX COLMOD ;Get no. colours -- MOS04 0103 CB20 8D 60 03 STA NCOLOR ;=0 if TTX -- MOS04 0104 CB23 BD FF C3 LDAAX BYTCHT ;No. bytes / char. -- MOS04 0105 CB26 8D 4F 03 STA BYTCH -- MOS04 0106 CB29 BD 3A C4 LDAAX NPIXTB ;no. pixles per byte -1, =0 if non-graphics mode -- MOS04 0107 CB2C 8D 61 03 STA NPIX -- MOS04 0108 CB2F D0 02 BNE CHMODB MOS04 0108 CB2F v7D MOS04 0109 CB31 A9 07 LDAIM &07 ;Initialise left and right masks for read character MOS04 0108 CB2F v7D MOS04 0110 CB33 0A CHMODB ASLA ;Define left and right masks. PRESERVE c !!! -- MOS04 0111 CB34 A8 TAY -- MOS04 0112 CB35 B9 06 C4 LDAAY MASKTB -&01 ;Offset to right mask -- MOS04 0113 CB38 8D 63 03 STA MASKR -- MOS04 0114 CB3B 0A CHMODC ASLA MOS04 0115 CB3C ^7D MOS04 0115 CB3C 10 FD BPL CHMODC ;Generate left most mask -- MOS04 0116 CB3E 8D 62 03 STA MASKL ;c=0 - preserve until byte width type generated -- MOS04 0117 CB41 BC 40 C4 LDYAX MODETB ;Memory map type -- MOS04 0118 CB44 8C 56 03 STY MEMODE -- MOS04 0119 CB47 B9 4F C4 LDAAY CZERO ;Initialise C0 -- MOS04 0120 CB4A 20 21 EA JSR CREG ;must preserve c=0 -- MOS04 0121 CB4D B9 4B C4 LDAAY CONE -- MOS04 0122 CB50 20 21 EA JSR CREG -- MOS04 0123 CB53 B9 59 C4 LDAAY BYTSTA ;Total bytes dsp.'ed -- MOS04 0124 CB56 8D 54 03 STA BYTSCN -- MOS04 0125 CB59 B9 5E C4 LDAAY STSCTB ;Addr. 1st to disp'ed -- MOS04 0126 CB5C 8D 4E 03 STA BEGSCN -- MOS04 0127 CB5F [ MOS125 = &FF -- MOS04 0133 CB5F | MOS04 MOS04 MOS04 MOS04 Acorn macro assembler Page 21 MOS04 VDU File - MOS04 MOS04 -- MOS04 0134 CB5F 98 TYA ;Get byte width type -- MOS04 0135 CB60 49 07 EORIM &07 -- MOS04 0136 CB62 4A LSRA -- MOS04 0137 CB63 AA TAX -- MOS04 0138 CB64 CA DEX ;Map (0,1,2,3,4) to (2,2,1,1,0) -- MOS04 0139 CB65 ] -- MOS04 0140 CB65 BD 66 C4 LDAAX TBZTBA ;LSB of table addr. -- MOS04 0141 CB68 85 E0 STA ZTBL -- MOS04 0142 CB6A A9 C3 LDAIM /(HRGTB ) ;MSB of same (always the same) -- MOS04 0143 CB6C 85 E1 STA ZTBL +&01 -- MOS04 0144 CB6E BD 63 C4 LDAAX BYTRTA ;Byte width of row -- MOS04 0145 CB71 8D 52 03 STA BYTROW -- MOS04 0146 CB74 8E 53 03 STX BYTROW +&01 -- MOS04 0147 CB77 A9 43 LDAIM &43 ;Preserve b6, b1 & b0 of STATS only -- MOS04 0148 CB79 20 A7 C5 JSR STTAND ;Clear all others -- MOS04 0149 CB7C AE 55 03 LDX MODE ;Indirect mode to mMODREG -- MOS04 0150 CB7F BD F7 C3 LDAAX INDMOD ;from this table -- MOS04 0151 CB82 20 29 EA JSR MVPRC0 ;as close as possible to the reprogramming of the 6845 -- MOS04 0152 CB85 -- MOS04 0153 CB85 ;PROGRAMME THE 6845 -- MOS04 0154 CB85 -- MOS04 0155 CB85 08 PHP -- MOS04 0156 CB86 78 SEI -- MOS04 0157 CB87 BE 69 C4 LDXAY CRTCX ;Get the table to Xmt -- MOS04 0158 CB8A A0 0B LDYIM &0B ;No. bytes to feed it -- MOS04 0159 CB8C BD 6E C4 CRTCLP LDAAX CRTCTB ;Load byte to MOS04 0163 CB94 ^76 MOS04 0160 CB8F 20 34 C9 JSR CRTCP ;Programme the 6845 and save value of cursor start MOS04 0163 CB94 ^76 MOS04 0161 CB92 CA DEX MOS04 0163 CB94 ^76 MOS04 0162 CB93 88 DEY MOS04 0163 CB94 ^76 MOS04 0163 CB94 10 F6 BPL CRTCLP -- MOS04 0164 CB96 28 PLP -- MOS04 0165 CB97 -- MOS04 0166 CB97 20 3F C8 JSR DCD ;Default log.phys. cols. -- MOS04 0167 CB9A 20 93 C9 JSR SUB ;Clear any windowing -- MOS04 0168 CB9D -- MOS04 0169 CB9D ;fall through to ..... -- MOS04 0170 CB9D -- MOS04 0171 CB9D A2 00 CLATXT LDXIM &00 ;TOPSCN:=BEGSCN -- MOS04 0172 CB9F AD 4E 03 LDA BEGSCN ;Load must be in this to ensure n=0, tested in CSDSPA -- MOS04 0173 CBA2 8E 50 03 STX TOPSCN -- MOS04 0174 CBA5 8D 51 03 STA TOPSCN +&01 -- MOS04 0175 CBA8 20 CC C9 JSR CSDSPA ;Home cursor -- MOS04 0176 CBAB A0 0C LDYIM &0C ;Take divided address -- MOS04 0177 CBAD 20 FF C9 JSR AXCRTC -- MOS04 0178 CBB0 AD 58 03 LDA BTCOLF -- MOS04 0179 CBB3 AE 56 03 LDX MEMODE ;Get mem.map type -- MOS04 0180 CBB6 BC 54 C4 LDYAX CLSCTA ;Set up jump vector -- MOS04 0181 CBB9 8C 5D 03 STY JVEC -- MOS04 0182 CBBC A0 CC LDYIM /(CLASCA ) ;Used to be LDYAX CLSCTB -- MOS04 0183 CBBE 8C 5E 03 STY JVEC +&01 -- MOS04 0184 CBC1 A2 00 LDXIM &00 -- MOS04 0185 CBC3 8E 69 02 STX LINES ;Initialise the number of lines scrolled -- MOS04 0186 CBC6 8E 18 03 STX CSX -- MOS04 0187 CBC9 8E 19 03 STX CSY -- MOS04 0188 CBCC 6C 5D 03 JMI JVEC -- MOS04 0189 CBCF -- MOS04 0190 CBCF RCHDEF -- MOS04 0191 CBCF 20 50 D0 JSR CHADDR ;Read character definition -- MOS04 0192 CBD2 A0 00 LDYIM &00 ;Address character (start of defn. now in ZTEMPC) -- MOS04 0193 CBD4 B1 DE PRABA LDAIY ZTEMPC ;Copy definition MOS04 0197 CBDB ^77 MOS04 0194 CBD6 C8 INY MOS04 0197 CBDB ^77 MOS04 0195 CBD7 91 F0 STAIY WARGS MOS04 0197 CBDB ^77 MOS04 0196 CBD9 C0 08 CPYIM &08 MOS04 0197 CBDB ^77 MOS04 0197 CBDB D0 F7 BNE PRABA -- MOS04 0198 CBDD 60 RTS -- MOS04 0199 CBDE -- MOS04 0200 CBDE [ MOS125 = &FF -- MOS04 0201 CBDE | -- MOS04 0202 CBDE ;Get the next line up, -- MOS04 0203 CBDE ;test if wraparound -- MOS04 0204 CBDE ;This is here as padding -- MOS04 0205 CBDE -- MOS04 0206 CBDE 48 SUBROW PHA -- MOS04 0207 CBDF 8A TXA -- MOS04 0208 CBE0 38 SEC -- MOS04 0209 CBE1 ED 52 03 SBC BYTROW -- MOS04 0210 CBE4 AA TAX -- MOS04 0211 CBE5 68 PLA -- MOS04 0212 CBE6 ED 53 03 SBC BYTROW +&01 -- MOS04 0213 CBE9 CD 4E 03 CMP BEGSCN -- MOS04 0214 CBEC 60 RTS -- MOS04 0215 CBED -- MOS04 0216 CBED ;NORTH -- MOS04 0217 CBED -- MOS04 0218 CBED ; Returns zero false -- MOS04 0219 CBED 38 NBDY SEC -- MOS04 0220 CBEE A5 D6 LDA ZMEMG -- MOS04 0221 CBF0 ED 52 03 SBC BYTROW -- MOS04 0222 CBF3 85 D6 STA ZMEMG -- MOS04 0223 CBF5 A5 D7 LDA ZMEMG +&01 -- MOS04 0224 CBF7 ED 53 03 SBC BYTROW +&01 -- MOS04 0225 CBFA CD 4E 03 CMP BEGSCN ;Wraparound ? -- MOS04 0226 CBFD B0 03 BCS NBDYA MOS04 0226 CBFD v7C MOS04 0227 CBFF 6D 54 03 ADC BYTSCN MOS04 0226 CBFD v7C MOS04 0228 CC02 85 D7 NBDYA STA ZMEMG +&01 -- MOS04 0229 CC04 A0 07 LDYIM &07 -- MOS04 0230 CC06 60 RTS -- MOS04 0231 CC07 ] -- MOS04 0232 CC07 -- MOS04 0233 CC07 9D 00 30 CLASCA STAAX &3000 ;Modes 1-3 (20K) -- MOS04 0234 CC0A 9D 00 31 STAAX &3100 -- MOS04 0235 CC0D 9D 00 32 STAAX &3200 -- MOS04 0236 CC10 9D 00 33 STAAX &3300 -- MOS04 0237 CC13 9D 00 34 STAAX &3400 -- MOS04 0238 CC16 9D 00 35 STAAX &3500 -- MOS04 0239 CC19 9D 00 36 STAAX &3600 -- MOS04 0240 CC1C 9D 00 37 STAAX &3700 -- MOS04 0241 CC1F 9D 00 38 STAAX &3800 -- MOS04 0242 CC22 9D 00 39 STAAX &3900 -- MOS04 0243 CC25 9D 00 3A STAAX &3A00 -- MOS04 0244 CC28 9D 00 3B STAAX &3B00 -- MOS04 0245 CC2B 9D 00 3C STAAX &3C00 -- MOS04 0246 CC2E 9D 00 3D STAAX &3D00 -- MOS04 0247 CC31 9D 00 3E STAAX &3E00 -- MOS04 0248 CC34 9D 00 3F STAAX &3F00 -- MOS04 0249 CC37 9D 00 40 CLASCB STAAX &4000 ;Mode 3 (16k) -- MOS04 0250 CC3A 9D 00 41 STAAX &4100 -- MOS04 0251 CC3D 9D 00 42 STAAX &4200 -- MOS04 0252 CC40 9D 00 43 STAAX &4300 -- MOS04 0253 CC43 9D 00 44 STAAX &4400 -- MOS04 0254 CC46 9D 00 45 STAAX &4500 MOS04 MOS04 MOS04 MOS04 Acorn macro assembler Page 22 MOS04 VDU File - MOS04 MOS04 -- MOS04 0255 CC49 9D 00 46 STAAX &4600 -- MOS04 0256 CC4C 9D 00 47 STAAX &4700 -- MOS04 0257 CC4F 9D 00 48 STAAX &4800 -- MOS04 0258 CC52 9D 00 49 STAAX &4900 -- MOS04 0259 CC55 9D 00 4A STAAX &4A00 -- MOS04 0260 CC58 9D 00 4B STAAX &4B00 -- MOS04 0261 CC5B 9D 00 4C STAAX &4C00 -- MOS04 0262 CC5E 9D 00 4D STAAX &4D00 -- MOS04 0263 CC61 9D 00 4E STAAX &4E00 -- MOS04 0264 CC64 9D 00 4F STAAX &4F00 -- MOS04 0265 CC67 9D 00 50 STAAX &5000 -- MOS04 0266 CC6A 9D 00 51 STAAX &5100 -- MOS04 0267 CC6D 9D 00 52 STAAX &5200 -- MOS04 0268 CC70 9D 00 53 STAAX &5300 -- MOS04 0269 CC73 9D 00 54 STAAX &5400 -- MOS04 0270 CC76 9D 00 55 STAAX &5500 -- MOS04 0271 CC79 9D 00 56 STAAX &5600 -- MOS04 0272 CC7C 9D 00 57 STAAX &5700 -- MOS04 0273 CC7F 9D 00 58 CLASCC STAAX &5800 ;Modes 4,5 (10K) -- MOS04 0274 CC82 9D 00 59 STAAX &5900 -- MOS04 0275 CC85 9D 00 5A STAAX &5A00 -- MOS04 0276 CC88 9D 00 5B STAAX &5B00 -- MOS04 0277 CC8B 9D 00 5C STAAX &5C00 -- MOS04 0278 CC8E 9D 00 5D STAAX &5D00 -- MOS04 0279 CC91 9D 00 5E STAAX &5E00 -- MOS04 0280 CC94 9D 00 5F STAAX &5F00 -- MOS04 0281 CC97 9D 00 60 CLASCD STAAX &6000 ;Mode 6 (8k) -- MOS04 0282 CC9A 9D 00 61 STAAX &6100 -- MOS04 0283 CC9D 9D 00 62 STAAX &6200 -- MOS04 0284 CCA0 9D 00 63 STAAX &6300 -- MOS04 0285 CCA3 9D 00 64 STAAX &6400 -- MOS04 0286 CCA6 9D 00 65 STAAX &6500 -- MOS04 0287 CCA9 9D 00 66 STAAX &6600 -- MOS04 0288 CCAC 9D 00 67 STAAX &6700 -- MOS04 0289 CCAF 9D 00 68 STAAX &6800 -- MOS04 0290 CCB2 9D 00 69 STAAX &6900 -- MOS04 0291 CCB5 9D 00 6A STAAX &6A00 -- MOS04 0292 CCB8 9D 00 6B STAAX &6B00 -- MOS04 0293 CCBB 9D 00 6C STAAX &6C00 -- MOS04 0294 CCBE 9D 00 6D STAAX &6D00 -- MOS04 0295 CCC1 9D 00 6E STAAX &6E00 -- MOS04 0296 CCC4 9D 00 6F STAAX &6F00 -- MOS04 0297 CCC7 9D 00 70 STAAX &7000 -- MOS04 0298 CCCA 9D 00 71 STAAX &7100 -- MOS04 0299 CCCD 9D 00 72 STAAX &7200 -- MOS04 0300 CCD0 9D 00 73 STAAX &7300 -- MOS04 0301 CCD3 9D 00 74 STAAX &7400 -- MOS04 0302 CCD6 9D 00 75 STAAX &7500 -- MOS04 0303 CCD9 9D 00 76 STAAX &7600 -- MOS04 0304 CCDC 9D 00 77 STAAX &7700 -- MOS04 0305 CCDF 9D 00 78 STAAX &7800 -- MOS04 0306 CCE2 9D 00 79 STAAX &7900 -- MOS04 0307 CCE5 9D 00 7A STAAX &7A00 -- MOS04 0308 CCE8 9D 00 7B STAAX &7B00 -- MOS04 0309 CCEB 9D 00 7C CLASCE STAAX &7C00 ;Mode 7 (1k = TTX) -- MOS04 0310 CCEE 9D 00 7D STAAX &7D00 -- MOS04 0311 CCF1 9D 00 7E STAAX &7E00 -- MOS04 0312 CCF4 9D 00 7F STAAX &7F00 -- MOS04 0313 CCF7 E8 INX -- MOS04 0314 CCF8 F0 61 BEQ ENSCRX MOS04 0314 CCF8 v1E MOS04 0315 CCFA 6C 5D 03 RUNNER JMI JVEC MOS04 0314 CCF8 v1E MOS04 0316 CCFD MOS04 0314 CCF8 v1E MOS04 0317 CCFD [ MOS125 = &FF MOS04 0314 CCF8 v1E MOS04 0332 CCFD ] MOS04 0314 CCF8 v1E MOS04 0333 CCFD MOS04 0314 CCF8 v1E MOS04 0334 CCFD FONT MOS04 0314 CCF8 v1E MOS04 0335 CCFD ; MOS04 0314 CCF8 v1E MOS04 0336 CCFD ; implode font MOS04 0314 CCF8 v1E MOS04 0337 CCFD ; MOS04 0314 CCF8 v1E MOS04 0338 CCFD A9 0F LDAIM &0F ;Fonts 1,2,3 hard (set 0). MSb not used MOS04 0314 CCF8 v1E MOS04 0339 CCFF 8D 67 03 STA FNTFLG MOS04 0314 CCF8 v1E MOS04 0340 CD02 ; MOS04 0314 CCF8 v1E MOS04 0341 CD02 A9 0C LDAIM SFPAGE MOS04 0314 CCF8 v1E MOS04 0342 CD04 A0 06 LDYIM &06 ;Set Fonts 1 to 7 to page SFPAGE MOS04 0314 CCF8 v1E MOS04 0343 CD06 99 68 03 FIMPA STAAY PGSFNT MOS04 0314 CCF8 v1E MOS04 0344 CD09 88 DEY MOS04 0314 CCF8 v1E MOS04 0345 CD0A 10 FA BPL FIMPA MOS04 0314 CCF8 v1E MOS04 0346 CD0C ; MOS04 0314 CCF8 v1E MOS04 0347 CD0C ; test operation type MOS04 0314 CCF8 v1E MOS04 0348 CD0C ; MOS04 0314 CCF8 v1E MOS04 0349 CD0C ; force X in range MOS04 0314 CCF8 v1E MOS04 0350 CD0C E0 07 CPXIM &07 MOS04 0314 CCF8 v1E MOS04 0351 CD0E 90 02 BCC FONTOK ;[X <= 6] MOS04 0314 CCF8 v1E MOS04 0352 CD10 A2 06 LDXIM &06 MOS04 0314 CCF8 v1E MOS04 0353 CD12 FONTOK ;0 <= X <= 6 MOS04 0314 CCF8 v1E MOS04 0354 CD12 8E 46 02 STX FONTSW ;record font state MOS04 0314 CCF8 v1E MOS04 0355 CD15 ; MOS04 0314 CCF8 v1E MOS04 0356 CD15 AD 43 02 LDA IHWM MOS04 0314 CCF8 v1E MOS04 0357 CD18 ; MOS04 0314 CCF8 v1E MOS04 0358 CD18 ; explode fonts that lie within extension pages MOS04 0314 CCF8 v1E MOS04 0359 CD18 ; MOS04 0314 CCF8 v1E MOS04 0360 CD18 A2 00 LDXIM &00 MOS04 0314 CCF8 v1E MOS04 0361 CD1A FEXPA MOS04 0314 CCF8 v1E MOS04 0362 CD1A EC 46 02 CPX FONTSW MOS04 0314 CCF8 v1E MOS04 0363 CD1D B0 0B BCS FEXPA0 MOS04 0314 CCF8 v1E MOS04 0364 CD1F ; C=0 MOS04 0314 CCF8 v1E MOS04 0365 CD1F BC BA C4 LDYAX FFSZOT MOS04 0314 CCF8 v1E MOS04 0366 CD22 99 68 03 STAAY PGSFNT MOS04 0314 CCF8 v1E MOS04 0367 CD25 ; C=0 MOS04 0314 CCF8 v1E MOS04 0368 CD25 69 01 ADCIM &01 MOS04 0314 CCF8 v1E MOS04 0369 CD27 E8 INX MOS04 0314 CCF8 v1E MOS04 0370 CD28 D0 F0 BNE FEXPA ;[ALWAYS jump] MOS04 0314 CCF8 v1E MOS04 0371 CD2A FEXPA0 MOS04 0314 CCF8 v1E MOS04 0372 CD2A ; MOS04 0314 CCF8 v1E MOS04 0373 CD2A ;X = FONTSW MOS04 0314 CCF8 v1E MOS04 0374 CD2A 8D 44 02 STA HWM MOS04 0314 CCF8 v1E MOS04 0375 CD2D ; MOS04 0314 CCF8 v1E MOS04 0376 CD2D A8 TAY MOS04 0314 CCF8 v1E MOS04 0377 CD2E F0 2B BEQ FONT0 MOS04 0314 CCF8 v1E MOS04 0378 CD30 A2 11 LDXIM SVHWMC MOS04 0314 CCF8 v1E MOS04 0379 CD32 4C 71 F1 JMP SVOP MOS04 0314 CCF8 v1E MOS04 0380 CD35 MOS04 0314 CCF8 v1E MOS04 0381 CD35 MOS04 0314 CCF8 v1E MOS04 0382 CD35 LNK MOS05 MOS04 0314 CCF8 v1E MOS05 0001 CD35 MOS04 0314 CCF8 v1E MOS05 0002 CD35 TTL VDU File - MOS05 MOS04 0314 CCF8 v1E MOS05 0003 CD35 OPT MOS05 MOS05 MOS05 MOS05 MOS05 Acorn macro assembler Page 23 MOS05 VDU File - MOS05 MOS05 MOS04 0314 CCF8 v1E MOS05 0004 CD35 ; MOS04 0314 CCF8 v1E MOS05 0005 CD35 ;Last update 05/05/82 MOS04 0314 CCF8 v1E MOS05 0006 CD35 MOS04 0314 CCF8 v1E MOS05 0007 CD35 ;05/05/82 RSAN corrected MOS04 0314 CCF8 v1E MOS05 0008 CD35 ;05/05/82 TADDRY changed to allow for only 1 table MOS04 0314 CCF8 v1E MOS05 0009 CD35 ;01/05/82 Recoded using new variable order & manifests MOS04 0314 CCF8 v1E MOS05 0010 CD35 ;01/05/82 Recode for new order of variables MOS04 0314 CCF8 v1E MOS05 0011 CD35 ;22/04/82 Encode ADDSCN & SUBSCN MOS04 0314 CCF8 v1E MOS05 0012 CD35 ;19/04/82 Comments added plus small byte squash MOS04 0314 CCF8 v1E MOS05 0013 CD35 ;25/03/82 Change all refs. to BEGSCN+1 to BEGSCN MOS04 0314 CCF8 v1E MOS05 0014 CD35 MOS04 0314 CCF8 v1E MOS05 0015 CD35 ;Account for scroll disabling if needs be MOS04 0314 CCF8 v1E MOS05 0016 CD35 ;Requires c=1 if scroll DOWN (cursor up) & vice versa MOS04 0314 CCF8 v1E MOS05 0017 CD35 ;If scroll enabled (b1 of STATS =0) adjusts PCSY unless on a margin MOS04 0314 CCF8 v1E MOS05 0018 CD35 ;If scroll disabled, wraps cursor, pulls return address from stack MOS04 0314 CCF8 v1E MOS05 0019 CD35 ;and jumps to CSDA. MOS04 0314 CCF8 v1E MOS05 0020 CD35 MOS04 0314 CCF8 v1E MOS05 0021 CD35 A9 02 ENSCRL LDAIM &02 ;Is scroll disabled ? MOS04 0314 CCF8 v1E MOS05 0022 CD37 24 D0 BIT STATS MOS04 0314 CCF8 v1E MOS05 0023 CD39 D0 02 BNE ENSCRM ;Yes?, then skip MOS04 0314 CCF8 v1E MOS05 0024 CD3B 50 32 BVC ENSCRR ;Or is CE set ? MOS04 0314 CCF8 v1E MOS05 0025 CD3D AD 09 03 ENSCRM LDA TWBROW ;Assume scroll up (so go to bottom row) MOS04 0314 CCF8 v1E MOS05 0026 CD40 90 03 BCC ENSCRN ;Unless c=1 MOS04 0314 CCF8 v1E MOS05 0027 CD42 AD 0B 03 LDA TWTROW ;Whence scroll DOWN (& go to top row) MOS04 0314 CCF8 v1E MOS05 0028 CD45 70 08 ENSCRN BVS ENSCRO ;If OUTPUT cursor, skip MOS04 0314 CCF8 v1E MOS05 0029 CD47 8D 19 03 STA CSY ;(this assumes windows are rectangular!) MOS04 0314 CCF8 v1E MOS05 0030 CD4A 68 PLA ;Cheat return stack MOS04 0314 CCF8 v1E MOS05 0031 CD4B 68 PLA MOS04 0314 CCF8 v1E MOS05 0032 CD4C 4C AE C6 JMP CSDA MOS04 0314 CCF8 v1E MOS05 0033 CD4F 08 ENSCRO PHP ;To preserve carry MOS04 0314 CCF8 v1E MOS05 0034 CD50 CD 65 03 CMP PCSY ;Would the input cursor like to go off screen ? MOS04 0314 CCF8 v1E MOS05 0035 CD53 F0 19 BEQ ENSCRP ;Yes?, then don't readdress it MOS04 0314 CCF8 v1E MOS05 0036 CD55 28 PLP ;Restore the carry, to see which way to go MOS04 0314 CCF8 v1E MOS05 0037 CD56 90 04 BCC ENSCRQ MOS04 0314 CCF8 v1E MOS05 0038 CD58 CE 65 03 DEC PCSY ;Scroll DOWN, so follow it down MOS04 0314 CCF8 v1E MOS05 0039 CD5B [ MOS125 = &FF MOS04 0314 CCF8 v1E MOS05 0040 CD5B | MOS04 0314 CCF8 v1E MOS05 0041 CD5B FONT0 MOS04 0314 CCF8 v1E MOS05 0042 CD5B ] MOS04 0314 CCF8 v1E MOS05 0043 CD5B 60 ENSCRX RTS ;May be referenced from MOS04 MOS05 0024 CD3B v4D MOS05 0044 CD5C EE 65 03 ENSCRQ INC PCSY ;Scroll UP, so go up as well MOS05 0024 CD3B v4D MOS05 0045 CD5F 60 RTS MOS05 0024 CD3B v4D MOS05 0046 CD60 MOS05 0024 CD3B v4D MOS05 0047 CD60 ;OCSRDL Delete output cursor MOS05 0024 CD3B v4D MOS05 0048 CD60 MOS05 0024 CD3B v4D MOS05 0049 CD60 08 OCSRDL PHP MOS05 0024 CD3B v4D MOS05 0050 CD61 48 PHA MOS05 0024 CD3B v4D MOS05 0051 CD62 AC 4F 03 LDY BYTCH MOS05 0024 CD3B v4D MOS05 0052 CD65 88 DEY ;TTX? MOS05 0024 CD3B v4D MOS05 0053 CD66 D0 0A BNE OCSRIV ;Not TTX?, then same as writing cursor, as it inverts MOS05 0024 CD3B v4D MOS05 0054 CD68 AD 38 03 LDA TTXTMP ;TTX?, then write remebered byte MOS05 0024 CD3B v4D MOS05 0055 CD6B 91 D8 STAIY ZMEMT ;(Y)=0 MOS05 0024 CD3B v4D MOS05 0056 CD6D 68 OCSREX PLA ;& exit MOS05 0024 CD3B v4D MOS05 0057 CD6E 28 ENSCRP PLP ;Get the stack correct MOS05 0024 CD3B v4D MOS05 0058 CD6F 60 ENSCRR RTS MOS05 0103 CD91 ^5A MOS05 0059 CD70 MOS05 0103 CD91 ^5A MOS05 0060 CD70 ;OCSRWR Write output cursor MOS05 0103 CD91 ^5A MOS05 0061 CD70 MOS05 0103 CD91 ^5A MOS05 0062 CD70 [ MOS125 = &FF MOS05 0103 CD91 ^5A MOS05 0084 CD70 | MOS05 0103 CD91 ^5A MOS05 0085 CD70 08 OCSRWR PHP MOS05 0103 CD91 ^5A MOS05 0086 CD71 48 PHA MOS05 0103 CD91 ^5A MOS05 0087 CD72 A9 3F OCSRIV LDAIM INVSXT MOS05 0103 CD91 ^5A MOS05 0088 CD74 AC 4F 03 LDY BYTCH MOS05 0103 CD91 ^5A MOS05 0089 CD77 C0 20 CPYIM &20 ;Mode 2 ? MOS05 0103 CD91 ^5A MOS05 0090 CD79 F0 13 BEQ OCSRIW ;Yes?, then don't invert the flashing bit MOS05 0103 CD91 ^5A MOS05 0091 CD7B A9 FF LDAIM &FF MOS05 0103 CD91 ^5A MOS05 0092 CD7D 88 DEY ;TTX? MOS05 0103 CD91 ^5A MOS05 0093 CD7E D0 08 BNE OCSRIU MOS05 0103 CD91 ^5A MOS05 0094 CD80 B1 D8 LDAIY ZMEMT ;(Y)=0 Yes?, then read byte directly from screen MOS05 0103 CD91 ^5A MOS05 0095 CD82 8D 38 03 STA TTXTMP ;and store it out of harm's way (no plotting in this mode) MOS05 0103 CD91 ^5A MOS05 0096 CD85 4D 66 03 EOR CHCSR ;Write the cursor MOS05 0103 CD91 ^5A MOS05 0097 CD88 48 OCSRIU PHA MOS05 0103 CD91 ^5A MOS05 0098 CD89 51 D8 EORIY ZMEMT ;Invert the character cell MOS05 0103 CD91 ^5A MOS05 0099 CD8B 91 D8 STAIY ZMEMT MOS05 0103 CD91 ^5A MOS05 0100 CD8D 68 PLA MOS05 0103 CD91 ^5A MOS05 0101 CD8E 88 OCSRIW DEY MOS05 0103 CD91 ^5A MOS05 0102 CD8F 10 F7 BPL OCSRIU MOS05 0103 CD91 ^5A MOS05 0103 CD91 30 DA BMI OCSREX ; Branch always -- MOS05 0104 CD93 ] -- MOS05 0105 CD93 -- MOS05 0106 CD93 ;Soft scrolling (non-anom.) -- MOS05 0107 CD93 -- MOS05 0108 CD93 ;Scroll DOWN -- MOS05 0109 CD93 -- MOS05 0110 CD93 20 5B CE SSCRDN JSR SSCRIN ;Initialise -- MOS05 0111 CD96 AD 09 03 LDA TWBROW ;1st receive address is bottom LH point -- MOS05 0112 CD99 8D 19 03 STA CSY ;(CSX initialised in SSCRIN) -- MOS05 0113 CD9C 20 09 CF JSR TADDRY ;address bottom LH point (guaranteed in window) -- MOS05 0114 CD9F 20 DE CB SSCRDA JSR SUBROW ;Get the address of the LH point of the next line up MOS05 0140 CDC6 ^57 MOS05 0115 CDA2 B0 03 BCS SSCRDB ;Wraparound between these two lines? NO, then continue MOS05 0140 CDC6 ^57 MOS05 0116 CDA4 6D 54 03 ADC BYTSCN ;Yes,then add screen and note we must scroll slowly! MOS05 0140 CDC6 ^57 MOS05 0117 CDA7 85 DB SSCRDB STA ZTEMP +&01 ;store transmit address MOS05 0140 CDC6 ^57 MOS05 0118 CDA9 86 DA STX ZTEMP MOS05 0140 CDC6 ^57 MOS05 0119 CDAB 85 DC STA ZTEMPB ;& MSB of next receive address (LSB is not changed) MOS05 0140 CDC6 ^57 MOS05 0120 CDAD [ MOS125 = &FF MOS05 0140 CDC6 ^57 MOS05 0127 CDAD | MOS05 0140 CDC6 ^57 MOS05 0128 CDAD 90 0A BCC SSCRDC ;c unchanged since just after SSCRDA MOS05 0140 CDC6 ^57 MOS05 0129 CDAF 20 DE CB SSCRDE JSR SUBROW ;Get next line up MOS05 0140 CDC6 ^57 MOS05 0130 CDB2 90 05 BCC SSCRDC ;Wraparound occured ?, then slow scroll to be safe MOS05 0140 CDC6 ^57 MOS05 0131 CDB4 20 38 CE JSR XMIT ;Scroll fast is possible MOS05 0140 CDC6 ^57 MOS05 0132 CDB7 F0 03 BEQ SSCRDD ;xmit returns EQ MOS05 0140 CDC6 ^57 MOS05 0133 CDB9 20 73 CE SSCRDC JSR SSCRS ;Scroll slowly ! MOS05 0140 CDC6 ^57 MOS05 0134 CDBC ] MOS05 0140 CDC6 ^57 MOS05 0135 CDBC A5 DC SSCRDD LDA ZTEMPB ;MSB of next receive address MOS05 0140 CDC6 ^57 MOS05 0136 CDBE A6 DA LDX ZTEMP ;LSB of same MOS05 0140 CDC6 ^57 MOS05 0137 CDC0 85 D9 STA ZMEMT +&01 ;Initialise next receive address MOS05 0140 CDC6 ^57 MOS05 0138 CDC2 86 D8 STX ZMEMT MOS05 0140 CDC6 ^57 MOS05 0139 CDC4 C6 DE DEC ZTEMPC ;Any more lines to copy ? MOS05 0140 CDC6 ^57 MOS05 0140 CDC6 D0 D7 BNE SSCRDA ;Don't bother to copy last line -- MOS05 0141 CDC8 A2 28 SSCREX LDXIM SSWS-V ;Preserve or restore current text cursor MOS05 0216 CE36 ^10 MOS05 0142 CDCA A0 18 LDYIM CSX-V MOS05 0216 CE36 ^10 MOS05 0143 CDCC A9 02 SWAP2 LDAIM &02 MOS05 0216 CE36 ^10 MOS05 0144 CDCE D0 06 BNE SWAP MOS05 0216 CE36 ^10 MOS05 0145 CDD0 A2 24 SWAPB LDXIM GCSIR-V ;SPLOTY requires c preserved MOS05 0216 CE36 ^10 MOS05 0146 CDD2 A0 14 SWAPC LDYIM OLDCS-V MOS05 0216 CE36 ^10 MOS05 0147 CDD4 MOS05 0216 CE36 ^10 MOS05 0148 CDD4 ;SWAPF swaps 4 bytes between (V)+(X) & (V)+(Y) MOS05 0216 CE36 ^10 MOS05 0149 CDD4 MOS05 0216 CE36 ^10 MOS05 0150 CDD4 A9 04 SWAPF LDAIM &04 ;by falling through to ... MOS05 0216 CE36 ^10 MOS05 0151 CDD6 MOS05 MOS05 MOS05 MOS05 Acorn macro assembler Page 24 MOS05 VDU File - MOS05 MOS05 MOS05 0216 CE36 ^10 MOS05 0152 CDD6 ;SWAP swaps (A) bytes between (V)+(X) & (V)+(Y) MOS05 0216 CE36 ^10 MOS05 0153 CDD6 MOS05 0216 CE36 ^10 MOS05 0154 CDD6 85 DA SWAP STA ZTEMP MOS05 0216 CE36 ^10 MOS05 0155 CDD8 BD 00 03 SWAPA LDAAX V MOS05 0216 CE36 ^10 MOS05 0156 CDDB 48 PHA MOS05 0216 CE36 ^10 MOS05 0157 CDDC B9 00 03 LDAAY V MOS05 0216 CE36 ^10 MOS05 0158 CDDF 9D 00 03 STAAX V MOS05 0216 CE36 ^10 MOS05 0159 CDE2 68 PLA MOS05 0216 CE36 ^10 MOS05 0160 CDE3 99 00 03 STAAY V MOS05 0216 CE36 ^10 MOS05 0161 CDE6 E8 INX MOS05 0216 CE36 ^10 MOS05 0162 CDE7 C8 INY MOS05 0216 CE36 ^10 MOS05 0163 CDE8 C6 DA DEC ZTEMP MOS05 0216 CE36 ^10 MOS05 0164 CDEA D0 EC BNE SWAPA MOS05 0216 CE36 ^10 MOS05 0165 CDEC 60 RTS MOS05 0216 CE36 ^10 MOS05 0166 CDED MOS05 0216 CE36 ^10 MOS05 0167 CDED MOS05 0216 CE36 ^10 MOS05 0168 CDED [ MOS125 = &FF MOS05 0216 CE36 ^10 MOS05 0169 CDED | MOS05 0216 CE36 ^10 MOS05 0170 CDED ;(SORTY exits with (X)<(Y)) MOS05 0216 CE36 ^10 MOS05 0171 CDED MOS05 0216 CE36 ^10 MOS05 0172 CDED A2 20 SORTA LDXIM NEWPT-V MOS05 0216 CE36 ^10 MOS05 0173 CDEF A0 14 LDYIM OLDCS-V MOS05 0216 CE36 ^10 MOS05 0174 CDF1 BD 02 03 SORTY LDAAX V+&02 MOS05 0216 CE36 ^10 MOS05 0175 CDF4 D9 02 03 CMPAY V+&02 MOS05 0216 CE36 ^10 MOS05 0176 CDF7 BD 03 03 LDAAX V+&03 MOS05 0216 CE36 ^10 MOS05 0177 CDFA F9 03 03 SBCAY V+&03 MOS05 0216 CE36 ^10 MOS05 0178 CDFD 10 D5 BPL SWAPF MOS05 0216 CE36 ^10 MOS05 0179 CDFF 60 RTS MOS05 0216 CE36 ^10 MOS05 0180 CE00 ] MOS05 0216 CE36 ^10 MOS05 0181 CE00 MOS05 0216 CE36 ^10 MOS05 0182 CE00 ;Soft scroll UP MOS05 0216 CE36 ^10 MOS05 0183 CE00 MOS05 0216 CE36 ^10 MOS05 0184 CE00 20 5B CE SSCRUP JSR SSCRIN ;Initialise MOS05 0216 CE36 ^10 MOS05 0185 CE03 AC 0B 03 LDY TWTROW ;Receive from top line, LH column MOS05 0216 CE36 ^10 MOS05 0186 CE06 8C 19 03 STY CSY MOS05 0216 CE36 ^10 MOS05 0187 CE09 20 09 CF JSR TADDRY ;Get 1st receive address (point guaranteed in window) MOS05 0216 CE36 ^10 MOS05 0188 CE0C 20 B1 CA SSCRUA JSR ADDROW ;Get line below MOS05 0216 CE36 ^10 MOS05 0189 CE0F 10 04 BPL SSCRUE ;Wraparound ? MOS05 0216 CE36 ^10 MOS05 0190 CE11 38 SEC ;Yes, then correct and scroll slowly MOS05 0216 CE36 ^10 MOS05 0191 CE12 ED 54 03 SBC BYTSCN MOS05 0216 CE36 ^10 MOS05 0192 CE15 85 DB SSCRUE STA ZTEMP +&01 ;Transmit address MOS05 0216 CE36 ^10 MOS05 0193 CE17 86 DA STX ZTEMP MOS05 0216 CE36 ^10 MOS05 0194 CE19 85 DC STA ZTEMPB ;MSB of next receive addr., LSB is preserved MOS05 0216 CE36 ^10 MOS05 0195 CE1B [ MOS125 = &FF MOS05 0216 CE36 ^10 MOS05 0202 CE1B | MOS05 0216 CE36 ^10 MOS05 0203 CE1B B0 0A BCS SSCRUC ;(c unchanged since just after SSCRUA) MOS05 0216 CE36 ^10 MOS05 0204 CE1D 20 B1 CA SSCRUB JSR ADDROW ;Get next line down MOS05 0216 CE36 ^10 MOS05 0205 CE20 30 05 BMI SSCRUC ;Wraparound ?, then scroll slowly to be safe MOS05 0216 CE36 ^10 MOS05 0206 CE22 20 38 CE JSR XMIT ;No?, then we can scroll fast MOS05 0216 CE36 ^10 MOS05 0207 CE25 F0 03 BEQ SSCRUD ;xmit returns EQ MOS05 0216 CE36 ^10 MOS05 0208 CE27 20 73 CE SSCRUC JSR SSCRS ;Scroll slowly MOS05 0216 CE36 ^10 MOS05 0209 CE2A ] MOS05 0216 CE36 ^10 MOS05 0210 CE2A A5 DC SSCRUD LDA ZTEMPB ;Load next receive address MOS05 0216 CE36 ^10 MOS05 0211 CE2C A6 DA LDX ZTEMP MOS05 0216 CE36 ^10 MOS05 0212 CE2E 85 D9 STA ZMEMT +&01 ;and store it MOS05 0216 CE36 ^10 MOS05 0213 CE30 86 D8 STX ZMEMT MOS05 0216 CE36 ^10 MOS05 0214 CE32 C6 DE DEC ZTEMPC ;any more lines to copy ? MOS05 0216 CE36 ^10 MOS05 0215 CE34 D0 D6 BNE SSCRUA ;don't bother with the last line MOS05 0216 CE36 ^10 MOS05 0216 CE36 F0 90 BEQ SSCREX ; Jump always -- MOS05 0217 CE38 -- MOS05 0218 CE38 ;XMIT - Fast soft scroll -- MOS05 0219 CE38 ;Copy PWWDTH bytes from (ZTEMP) to (ZMEMT) -- MOS05 0220 CE38 -- MOS05 0221 CE38 AE 4D 03 XMIT LDX PWWDTH +&01 ;How many pages? -- MOS05 0222 CE3B F0 10 BEQ XMITB ;None?, then attempt fractional MOS05 0222 CE3B v6F MOS05 0223 CE3D A0 00 LDYIM &00 MOS05 0222 CE3B v6F MOS05 0224 CE3F B1 DA XMITA LDAIY ZTEMP ;Inner loop - copy complete page MOS05 0222 CE3B v6F MOS05 0225 CE41 91 D8 STAIY ZMEMT MOS05 0222 CE3B v6F MOS05 0226 CE43 C8 INY MOS05 0222 CE3B v6F MOS05 0227 CE44 D0 F9 BNE XMITA MOS05 0222 CE3B v6F MOS05 0228 CE46 E6 D9 INC ZMEMT +&01 ;Prepare to copy next page MOS05 0222 CE3B v6F MOS05 0229 CE48 E6 DB INC ZTEMP +&01 MOS05 0222 CE3B v6F MOS05 0230 CE4A CA DEX ;Any more complete pages to copy ? MOS05 0222 CE3B v6F MOS05 0231 CE4B D0 F2 BNE XMITA MOS05 0222 CE3B v6F MOS05 0232 CE4D AC 4C 03 XMITB LDY PWWDTH ;Copy fractional page? -- MOS05 0233 CE50 F0 08 BEQ XMITD ;No?, then exit MOS05 0233 CE50 v77 MOS05 0234 CE52 88 XMITC DEY MOS05 0233 CE50 v77 MOS05 0235 CE53 B1 DA LDAIY ZTEMP ;Yes?, then do so MOS05 0233 CE50 v77 MOS05 0236 CE55 91 D8 STAIY ZMEMT MOS05 0233 CE50 v77 MOS05 0237 CE57 98 TYA MOS05 0233 CE50 v77 MOS05 0238 CE58 D0 F8 BNE XMITC MOS05 0233 CE50 v77 MOS05 0239 CE5A 60 XMITD RTS ;Referenced below -- MOS05 0240 CE5B -- MOS05 0241 CE5B ;SSCRIN Soft scroll initialisation -- MOS05 0242 CE5B -- MOS05 0243 CE5B ;(SSWS) := (CSX)(CSY) -- MOS05 0244 CE5B ;(CSX) := (TWLCOL) -- MOS05 0245 CE5B ;(ZTEMPC) := No. of rows to scroll, minus one -- MOS05 0246 CE5B -- MOS05 0247 CE5B 20 C8 CD SSCRIN JSR SSCREX ;Store current text cursor for future reference -- MOS05 0248 CE5E 38 SEC ;Determine no. of rows to scroll -- MOS05 0249 CE5F AD 09 03 LDA TWBROW ;i.e. no. rows in window minus 1 -- MOS05 0250 CE62 ED 0B 03 SBC TWTROW -- MOS05 0251 CE65 85 DE STA ZTEMPC -- MOS05 0252 CE67 D0 05 BNE SSCRIM MOS05 0252 CE67 v7A MOS05 0253 CE69 68 PLA ;If zero lines to scroll, then cheat stack MOS05 0252 CE67 v7A MOS05 0254 CE6A 68 PLA MOS05 0252 CE67 v7A MOS05 0255 CE6B 4C C8 CD JMP SSCREX ;& restore cursor MOS05 0252 CE67 v7A MOS05 0256 CE6E MOS05 0252 CE67 v7A MOS05 0257 CE6E AD 08 03 SSCRIM LDA TWLCOL ;Put x cursor on LH margin -- MOS05 0258 CE71 10 70 BPL CLTLND MOS05 0258 CE71 v0F MOS05 0259 CE73 MOS05 0258 CE71 v0F MOS05 0260 CE73 MOS05 0258 CE71 v0F MOS05 0261 CE73 ;SSCRS Slow soft scroll MOS05 0258 CE71 v0F MOS05 0262 CE73 ;Scrolls 1 row of characters, one by one from (ZTEMP) to (ZMEMT), MOS05 0258 CE71 v0F MOS05 0263 CE73 ;preserving the LSB of ZTEMP. MOS05 0258 CE71 v0F MOS05 0264 CE73 ;Requires that ZMEMT & ZTEMP be juxtaposed. MOS05 0258 CE71 v0F MOS05 0265 CE73 ;Checks for wraparound after each character is copied MOS05 0258 CE71 v0F MOS05 0266 CE73 MOS05 0258 CE71 v0F MOS05 0267 CE73 A5 DA SSCRS LDA ZTEMP ;Push LSB of ZTEMP MOS05 0258 CE71 v0F MOS05 0268 CE75 48 PHA MOS05 0258 CE71 v0F MOS05 0269 CE76 38 SEC ;Calc no. chars to copy -1 MOS05 0258 CE71 v0F MOS05 0270 CE77 AD 0A 03 LDA TWRCOL MOS05 0258 CE71 v0F MOS05 0271 CE7A ED 08 03 SBC TWLCOL MOS05 0258 CE71 v0F MOS05 0272 CE7D 85 DF STA ZTEMPC +&01 ;No. of columns to be scrolled (for loop) MOS05 0258 CE71 v0F MOS05 0273 CE7F AC 4F 03 SSCRSA LDY BYTCH MOS05 0258 CE71 v0F MOS05 0274 CE82 88 DEY MOS05 0258 CE71 v0F MOS05 0275 CE83 B1 DA SSCRSB LDAIY ZTEMP ;~~~ Copy 1 character ~~~ MOS05 0258 CE71 v0F MOS05 0276 CE85 91 D8 STAIY ZMEMT ;by copying (BYTCH) consecutive bytes MOS05 0258 CE71 v0F MOS05 0277 CE87 88 DEY MOS05 0258 CE71 v0F MOS05 0278 CE88 10 F9 BPL SSCRSB MOS05 MOS05 MOS05 MOS05 Acorn macro assembler Page 25 MOS05 VDU File - MOS05 MOS05 MOS05 0258 CE71 v0F MOS05 0279 CE8A A2 02 LDXIM &02 ;Now add BYTCH to ZMEMT & ZTEMP, MOS05 0258 CE71 v0F MOS05 0280 CE8C 18 SSCRSC CLC ;checking for wraparound on both MOS05 0258 CE71 v0F MOS05 0281 CE8D B5 D8 LDAZX ZMEMT ;uses ZX mode, hence need for ZMEMT to be next to ZTEMP MOS05 0258 CE71 v0F MOS05 0282 CE8F 6D 4F 03 ADC BYTCH MOS05 0258 CE71 v0F MOS05 0283 CE92 95 D8 STAZX ZMEMT MOS05 0258 CE71 v0F MOS05 0284 CE94 B5 D9 LDAZX ZMEMT +&01 MOS05 0258 CE71 v0F MOS05 0285 CE96 69 00 ADCIM &00 MOS05 0258 CE71 v0F MOS05 0286 CE98 10 04 BPL SSCRSD ;Did wraparound occur? MOS05 0258 CE71 v0F MOS05 0287 CE9A 38 SEC MOS05 0258 CE71 v0F MOS05 0288 CE9B ED 54 03 SBC BYTSCN MOS05 0258 CE71 v0F MOS05 0289 CE9E 95 D9 SSCRSD STAZX ZMEMT +&01 MOS05 0258 CE71 v0F MOS05 0290 CEA0 CA DEX MOS05 0258 CE71 v0F MOS05 0291 CEA1 CA DEX MOS05 0258 CE71 v0F MOS05 0292 CEA2 F0 E8 BEQ SSCRSC ;(Do ZMEMT) MOS05 0258 CE71 v0F MOS05 0293 CEA4 C6 DF DEC ZTEMPC +&01 ;Any more characters? MOS05 0258 CE71 v0F MOS05 0294 CEA6 10 D7 BPL SSCRSA MOS05 0258 CE71 v0F MOS05 0295 CEA8 68 PLA ;Restore LSB of ZMEMT MOS05 0258 CE71 v0F MOS05 0296 CEA9 85 DA STA ZTEMP MOS05 0258 CE71 v0F MOS05 0297 CEAB 60 RTS MOS05 0258 CE71 v0F MOS05 0298 CEAC MOS05 0258 CE71 v0F MOS05 0299 CEAC ;Clear the line of text addressed by CSY MOS05 0258 CE71 v0F MOS05 0300 CEAC ;Preserve CSY & CSX MOS05 0258 CE71 v0F MOS05 0301 CEAC MOS05 0258 CE71 v0F MOS05 0302 CEAC AD 18 03 CLTLIN LDA CSX ;Push the current X cursor position MOS05 0258 CE71 v0F MOS05 0303 CEAF 48 PHA MOS05 0258 CE71 v0F MOS05 0304 CEB0 20 6E CE JSR SSCRIM ;CSX = Left margin of window MOS05 0258 CE71 v0F MOS05 0305 CEB3 20 09 CF JSR TADDRY ;Init. ZMEMT MOS05 0258 CE71 v0F MOS05 0306 CEB6 38 SEC MOS05 0258 CE71 v0F MOS05 0307 CEB7 AD 0A 03 LDA TWRCOL MOS05 0258 CE71 v0F MOS05 0308 CEBA ED 08 03 SBC TWLCOL MOS05 0258 CE71 v0F MOS05 0309 CEBD 85 DC STA ZTEMPB ;Column count MOS05 0258 CE71 v0F MOS05 0310 CEBF AD 58 03 CLTLNA LDA BTCOLF ;get colour MOS05 0258 CE71 v0F MOS05 0311 CEC2 AC 4F 03 LDY BYTCH ;Bytes / character MOS05 0258 CE71 v0F MOS05 0312 CEC5 88 CLTNB DEY ;Inner loop - clear one character cell MOS05 0258 CE71 v0F MOS05 0313 CEC6 91 D8 STAIY ZMEMT ;(preserves z from previous DEY) MOS05 0258 CE71 v0F MOS05 0314 CEC8 D0 FB BNE CLTNB ;1 char cell MOS05 0258 CE71 v0F MOS05 0315 CECA 8A TXA ;Update ZMEMT MOS05 0258 CE71 v0F MOS05 0316 CECB 18 CLC MOS05 0258 CE71 v0F MOS05 0317 CECC 6D 4F 03 ADC BYTCH MOS05 0258 CE71 v0F MOS05 0318 CECF AA TAX MOS05 0258 CE71 v0F MOS05 0319 CED0 A5 D9 LDA ZMEMT +&01 MOS05 0258 CE71 v0F MOS05 0320 CED2 69 00 ADCIM &00 MOS05 0258 CE71 v0F MOS05 0321 CED4 10 04 BPL CLNLC ;Wraparound ? MOS05 0258 CE71 v0F MOS05 0322 CED6 38 SEC ;Yes, then subtract off the number of bytes per screen MOS05 0258 CE71 v0F MOS05 0323 CED7 ED 54 03 SBC BYTSCN MOS05 0258 CE71 v0F MOS05 0324 CEDA 86 D8 CLNLC STX ZMEMT MOS05 0258 CE71 v0F MOS05 0325 CEDC 85 D9 STA ZMEMT +&01 MOS05 0258 CE71 v0F MOS05 0326 CEDE C6 DC DEC ZTEMPB ;One less character to clear MOS05 0258 CE71 v0F MOS05 0327 CEE0 10 DD BPL CLTLNA ;Any more? MOS05 0258 CE71 v0F MOS05 0328 CEE2 68 PLA MOS05 0258 CE71 v0F MOS05 0329 CEE3 8D 18 03 CLTLND STA CSX -- MOS05 0330 CEE6 38 FAIL SEC MOS05 0368 CF07 ^5D MOS05 0331 CEE7 60 RTS MOS05 0368 CF07 ^5D MOS05 0332 CEE8 MOS05 0368 CF07 ^5D MOS05 0333 CEE8 MOS05 0368 CF07 ^5D MOS05 0334 CEE8 ;Addresses CSX,CSY to memory locn. on screen. MOS05 0368 CF07 ^5D MOS05 0335 CEE8 ;Checks that CSX & CSY are in window MOS05 0368 CF07 ^5D MOS05 0336 CEE8 ;Returns with no action and c=1 if outside. MOS05 0368 CF07 ^5D MOS05 0337 CEE8 ;If OK, initialises ZMEMT and CSPOSN MOS05 0368 CF07 ^5D MOS05 0338 CEE8 ;Exits with cursor address in (AX) MOS05 0368 CF07 ^5D MOS05 0339 CEE8 ;For cursor display, follow immediately with MOS05 0368 CF07 ^5D MOS05 0340 CEE8 ;JSR CSDSP MOS05 0368 CF07 ^5D MOS05 0341 CEE8 MOS05 0368 CF07 ^5D MOS05 0342 CEE8 [ MOS125 = &FF MOS05 0368 CF07 ^5D MOS05 0355 CEE8 | MOS05 0368 CF07 ^5D MOS05 0356 CEE8 8D 19 03 SYTADD STA CSY MOS05 0368 CF07 ^5D MOS05 0357 CEEB AE 18 03 TADDR LDX CSX ;Check window of CSX MOS05 0368 CF07 ^5D MOS05 0358 CEEE EC 08 03 CPX TWLCOL ;Lower than LH margin ? MOS05 0368 CF07 ^5D MOS05 0359 CEF1 90 F3 BCC FAIL MOS05 0368 CF07 ^5D MOS05 0360 CEF3 EC 0A 03 CPX TWRCOL ;Higher than RH edge ? MOS05 0368 CF07 ^5D MOS05 0361 CEF6 90 02 BCC TADDRX MOS05 0368 CF07 ^5D MOS05 0362 CEF8 D0 EC BNE FAIL MOS05 0368 CF07 ^5D MOS05 0363 CEFA AE 19 03 TADDRX LDX CSY ;Check CSY MOS05 0368 CF07 ^5D MOS05 0364 CEFD EC 0B 03 CPX TWTROW MOS05 0368 CF07 ^5D MOS05 0365 CF00 90 E4 BCC FAIL MOS05 0368 CF07 ^5D MOS05 0366 CF02 EC 09 03 CPX TWBROW MOS05 0368 CF07 ^5D MOS05 0367 CF05 90 02 BCC TADDRY MOS05 0368 CF07 ^5D MOS05 0368 CF07 D0 DD BNE FAIL MOS05 0367 CF05 v7D MOS05 0369 CF09 ] MOS05 0367 CF05 v7D MOS05 0370 CF09 MOS05 0367 CF05 v7D MOS05 0371 CF09 ;End of windowing, now calc. memory posn. MOS05 0367 CF05 v7D MOS05 0372 CF09 ;As TADDR with no bounds checking MOS05 0367 CF05 v7D MOS05 0373 CF09 ;Returns carry clear MOS05 0367 CF05 v7D MOS05 0374 CF09 MOS05 0367 CF05 v7D MOS05 0375 CF09 AD 19 03 TADDRY LDA CSY ;Twice row no. to Y -- MOS05 0376 CF0C 0A ASLA -- MOS05 0377 CF0D A8 TAY ;(c=0 at this point) -- MOS05 0378 CF0E B1 E0 LDAIY ZTBL ;MSB -- MOS05 0379 CF10 85 D9 STA ZMEMT+&01 -- MOS05 0380 CF12 C8 INY -- MOS05 0381 CF13 A9 02 LDAIM &02 -- MOS05 0382 CF15 2D 56 03 AND MEMODE ;Non-zero if table offset is to be halved -- MOS05 0383 CF18 08 PHP -- MOS05 0384 CF19 B1 E0 LDAIY ZTBL ;LSB -- MOS05 0385 CF1B 28 PLP -- MOS05 0386 CF1C F0 03 BEQ TADDRH MOS05 0386 CF1C v7C MOS05 0387 CF1E 46 D9 LSR ZMEMT+&01 MOS05 0386 CF1C v7C MOS05 0388 CF20 6A RORA MOS05 0386 CF1C v7C MOS05 0389 CF21 6D 50 03 TADDRH ADC TOPSCN ;c=0 Add LSB -- MOS05 0390 CF24 85 D8 STA ZMEMT -- MOS05 0391 CF26 A5 D9 LDA ZMEMT+&01 ;Add MSB -- MOS05 0392 CF28 6D 51 03 ADC TOPSCN+&01 -- MOS05 0393 CF2B A8 TAY ;Xfr MSB to Y -- MOS05 0394 CF2C ;Mpy. CSX by BYTCH -- MOS05 0395 CF2C AD 18 03 LDA CSX -- MOS05 0396 CF2F AE 4F 03 LDX BYTCH ;Is it TTX ? -- MOS05 0397 CF32 CA DEX -- MOS05 0398 CF33 F0 12 BEQ TADDRE ;Skip mult. if TTX MOS05 0398 CF33 v6D MOS05 0399 CF35 E0 0F CPXIM &0F ;4 colour (16 bytes) ? MOS05 0398 CF33 v6D MOS05 0400 CF37 F0 03 BEQ TADDRF MOS05 0398 CF33 v6D MOS05 0401 CF39 90 02 BCC TADDRG ;Less ? Then 2 colour MOS05 0398 CF33 v6D MOS05 0402 CF3B 0A ASLA ;Must have been 16 colour MOS05 0398 CF33 v6D MOS05 0403 CF3C 0A TADDRF ASLA ;4 colour MOS05 0398 CF33 v6D MOS05 0404 CF3D 0A TADDRG ASLA ;2 colour MOS05 0398 CF33 v6D MOS05 0405 CF3E 0A ASLA MOS05 0398 CF33 v6D MOS05 0406 CF3F 90 02 BCC TADDRB MOS05 0398 CF33 v6D MOS05 0407 CF41 C8 INY ;c=1?, then inc. MSB by 2 MOS05 0398 CF33 v6D MOS05 0408 CF42 C8 INY MOS05 0398 CF33 v6D MOS05 0409 CF43 0A TADDRB ASLA MOS05 0398 CF33 v6D MOS05 0410 CF44 90 02 BCC TADDRC MOS05 0398 CF33 v6D MOS05 0411 CF46 C8 INY ;c=1, then inc. MSB by 1 MOS05 MOS05 MOS05 MOS05 Acorn macro assembler Page 26 MOS05 VDU File - MOS05 MOS05 MOS05 0398 CF33 v6D MOS05 0412 CF47 18 TADDRE CLC MOS05 0410 CF44 v7D MOS05 0413 CF48 65 D8 TADDRC ADC ZMEMT ;(c=0), add LSB of row offset -- MOS05 0414 CF4A 85 D8 STA ZMEMT -- MOS05 0415 CF4C 8D 4A 03 STA CSPOSN -- MOS05 0416 CF4F AA TAX ;LSB is returned by this routine in X -- MOS05 0417 CF50 98 TYA ;MSB to A -- MOS05 0418 CF51 69 00 ADCIM &00 -- MOS05 0419 CF53 8D 4B 03 STA CSPOSN +&01 ;Store to cursor before wraparound -- MOS05 0420 CF56 10 04 BPL TADDRD ;Wraparound ? MOS05 0420 CF56 v7B MOS05 0421 CF58 38 SEC ;Yes, then subt. scn. MOS05 0420 CF56 v7B MOS05 0422 CF59 ED 54 03 SBC BYTSCN MOS05 0420 CF56 v7B MOS05 0423 CF5C 85 D9 TADDRD STA ZMEMT +&01 ;Store physical address to ZMEMT -- MOS05 0424 CF5E 18 CLC ;indicate successful addressing -- MOS05 0425 CF5F 60 RTS -- MOS05 0426 CF60 -- MOS05 0427 CF60 ;PRINT CHARACTER TO VDU -- MOS05 0428 CF60 -- MOS05 0429 CF60 -- MOS05 0430 CF60 -- MOS05 0431 CF60 -- MOS05 0432 CF60 ;ANOMALOUS PRINTING -- MOS05 0433 CF60 -- MOS05 0434 CF60 AE 59 03 PRANM LDX FGCOLF ;Printing to be in foreground graphics colour MOS05 0507 CFB6 ^28 MOS05 0435 CF63 AC 5B 03 LDY GPLFMD ;In the current foreground colour mode MOS05 0507 CFB6 ^28 MOS05 0436 CF66 20 C5 D0 PRANC JSR SETZG ;Initialise ZGORA & ZGEOR MOS05 0543 CFD6 ^0E MOS05 0437 CF69 MOS05 0543 CFD6 ^0E MOS05 0438 CF69 ;The graphics cursor is copied to 2 locations, APCS1 MOS05 0543 CFD6 ^0E MOS05 0439 CF69 ;and APCS2 . The latter is left untouched until the end of the printing, MOS05 0543 CFD6 ^0E MOS05 0440 CF69 ;when it is restored to the GCSIY. The former is copied to the GCSIY MOS05 0543 CFD6 ^0E MOS05 0441 CF69 ;after every column of pixels is printed, with the X cursor incremented MOS05 0543 CFD6 ^0E MOS05 0442 CF69 ;each time. MOS05 0543 CFD6 ^0E MOS05 0443 CF69 MOS05 0543 CFD6 ^0E MOS05 0444 CF69 20 3C D4 JSR COPYFA ;Copy GCSIY to APCS2 ... MOS05 0543 CFD6 ^0E MOS05 0445 CF6C A0 00 LDYIM &00 ;Initialise row counter MOS05 0543 CFD6 ^0E MOS05 0446 CF6E 84 DC PRANMC STY ZTEMPB MOS05 0543 CFD6 ^0E MOS05 0447 CF70 [ MOS125 = &FF MOS05 0543 CFD6 ^0E MOS05 0449 CF70 ] MOS05 0543 CFD6 ^0E MOS05 0450 CF70 B1 DE LDAIY ZTEMPC ;Anything to do ? MOS05 0543 CFD6 ^0E MOS05 0451 CF72 F0 13 BEQ PRANMG ;No, then skip MOS05 0543 CFD6 ^0E MOS05 0452 CF74 85 DD STA ZTEMPB +&01 MOS05 0543 CFD6 ^0E MOS05 0453 CF76 10 03 PRANMA BPL PRANMD MOS05 0543 CFD6 ^0E MOS05 0454 CF78 20 F5 D0 JSR WPLOTA ;Yes, then plot if inside window MOS05 0543 CFD6 ^0E MOS05 0455 CF7B EE 24 03 PRANMD INC GCSIX ;Increment X cursor MOS05 0543 CFD6 ^0E MOS05 0456 CF7E D0 03 BNE PRANME MOS05 0543 CFD6 ^0E MOS05 0457 CF80 EE 25 03 INC GCSIX +&01 MOS05 0543 CFD6 ^0E MOS05 0458 CF83 06 DD PRANME ASL ZTEMPB +&01 MOS05 0543 CFD6 ^0E MOS05 0459 CF85 D0 EF BNE PRANMA MOS05 0543 CFD6 ^0E MOS05 0460 CF87 A2 28 PRANMG LDXIM APCS1-V ;Restore previous x cursor MOS05 0543 CFD6 ^0E MOS05 0461 CF89 A0 24 LDYIM GCSIR-V MOS05 0543 CFD6 ^0E MOS05 0462 CF8B 20 38 D4 JSR COPY2 MOS05 0543 CFD6 ^0E MOS05 0463 CF8E AC 26 03 LDY GCSIY ;Decrement Igraphics Y cursor MOS05 0543 CFD6 ^0E MOS05 0464 CF91 D0 03 BNE PRANMF MOS05 0543 CFD6 ^0E MOS05 0465 CF93 CE 27 03 DEC GCSIY +&01 MOS05 0543 CFD6 ^0E MOS05 0466 CF96 CE 26 03 PRANMF DEC GCSIY MOS05 0543 CFD6 ^0E MOS05 0467 CF99 A4 DC LDY ZTEMPB ;Do next row MOS05 0543 CFD6 ^0E MOS05 0468 CF9B C8 INY MOS05 0543 CFD6 ^0E MOS05 0469 CF9C C0 08 CPYIM &08 MOS05 0543 CFD6 ^0E MOS05 0470 CF9E D0 CE BNE PRANMC MOS05 0543 CFD6 ^0E MOS05 0471 CFA0 A2 28 LDXIM APCS1 ;Finished, so restore grpahics cursor MOS05 0543 CFD6 ^0E MOS05 0472 CFA2 A0 24 LDYIM GCSIR-V MOS05 0543 CFD6 ^0E MOS05 0473 CFA4 4C 40 D4 JMP COPYF ; (branch always taken) MOS05 0543 CFD6 ^0E MOS05 0474 CFA7 MOS05 0543 CFD6 ^0E MOS05 0475 CFA7 [ MOS125 = &FF MOS05 0543 CFD6 ^0E MOS05 0491 CFA7 ] MOS05 0543 CFD6 ^0E MOS05 0492 CFA7 MOS05 0543 CFD6 ^0E MOS05 0493 CFA7 ;NON-ANOMALOUS MOS05 0543 CFD6 ^0E MOS05 0494 CFA7 MOS05 0543 CFD6 ^0E MOS05 0495 CFA7 ;Character to be printed in (A) MOS05 0543 CFD6 ^0E MOS05 0496 CFA7 MOS05 0543 CFD6 ^0E MOS05 0497 CFA7 ;Set up address of bytes to be MOS05 0543 CFD6 ^0E MOS05 0498 CFA7 ;copied from soft font. Result MOS05 0543 CFD6 ^0E MOS05 0499 CFA7 ;to ZTEMP MOS05 0543 CFD6 ^0E MOS05 0500 CFA7 MOS05 0543 CFD6 ^0E MOS05 0501 CFA7 AE 60 03 VDUPR LDX NCOLOR ;TTX? MOS05 0543 CFD6 ^0E MOS05 0502 CFAA F0 44 BEQ PTTX MOS05 0543 CFD6 ^0E MOS05 0503 CFAC 20 50 D0 JSR CHADDR ;Point (ZTEMPC) to character in soft font MOS05 0543 CFD6 ^0E MOS05 0504 CFAF AE 60 03 VDUPRB LDX NCOLOR ;Because CHADDR now destroys (X) MOS05 0543 CFD6 ^0E MOS05 0505 CFB2 A5 D0 LDA STATS ;Is this anomalous printing ? MOS05 0543 CFD6 ^0E MOS05 0506 CFB4 29 20 ANDIM &20 MOS05 0543 CFD6 ^0E MOS05 0507 CFB6 D0 A8 BNE PRANM ;Anom. printing MOS05 0543 CFD6 ^0E MOS05 0508 CFB8 MOS05 0543 CFD6 ^0E MOS05 0509 CFB8 ;Now select the mode MOS05 0543 CFD6 ^0E MOS05 0510 CFB8 MOS05 0543 CFD6 ^0E MOS05 0511 CFB8 A0 07 LDYIM &07 ;No. rows (except TTX) MOS05 0543 CFD6 ^0E MOS05 0512 CFBA E0 03 CPXIM &03 MOS05 0543 CFD6 ^0E MOS05 0513 CFBC F0 47 BEQ PFOUR ;4 colour mode ? MOS05 0543 CFD6 ^0E MOS05 0514 CFBE B0 71 BCS PSXTN ;16 colour mode ? MOS05 0514 CFBE v0E MOS05 0515 CFC0 MOS05 0514 CFBE v0E MOS05 0516 CFC0 ;TWO colour mode MOS05 0514 CFBE v0E MOS05 0517 CFC0 MOS05 0514 CFBE v0E MOS05 0518 CFC0 B1 DE PTWO LDAIY ZTEMPC MOS05 0514 CFBE v0E MOS05 0519 CFC2 05 D2 ORA ZORA MOS05 0514 CFBE v0E MOS05 0520 CFC4 45 D3 EOR ZEOR MOS05 0514 CFBE v0E MOS05 0521 CFC6 91 D8 STAIY ZMEMT MOS05 0514 CFBE v0E MOS05 0522 CFC8 88 DEY MOS05 0514 CFBE v0E MOS05 0523 CFC9 10 F5 BPL PTWO MOS05 0514 CFBE v0E MOS05 0524 CFCB 60 RTS MOS05 0514 CFBE v0E MOS05 0525 CFCC MOS05 0514 CFBE v0E MOS05 0526 CFCC ;TELETEXT mode MOS05 0514 CFBE v0E MOS05 0527 CFCC MOS05 0514 CFBE v0E MOS05 0528 CFCC [ MOS125 = &FF MOS05 0514 CFBE v0E MOS05 0538 CFCC | MOS05 0514 CFBE v0E MOS05 0539 CFCC A9 7F DELA LDAIM &7F ;Point to DEL, only unprintable char. in hard font =$FF...$FF MOS05 0514 CFBE v0E MOS05 0540 CFCE 20 50 D0 JSR CHADDR MOS05 0514 CFBE v0E MOS05 0541 CFD1 AE 5A 03 LDX BGCOLF ;Force this to be graphics background colour MOS05 0514 CFBE v0E MOS05 0542 CFD4 A0 00 LDYIM &00 ;Mode is STORE MOS05 0514 CFBE v0E MOS05 0543 CFD6 F0 8E BEQ PRANC MOS05 0514 CFBE v0E MOS05 0544 CFD8 MOS05 0514 CFBE v0E MOS05 0545 CFD8 ;DEL ($7F) Delete previous char MOS05 0514 CFBE v0E MOS05 0546 CFD8 MOS05 0514 CFBE v0E MOS05 0547 CFD8 20 C4 C5 DEL JSR BS ;Move back 1 character MOS05 0514 CFBE v0E MOS05 0548 CFDB 20 87 C5 JSR ANOMQ MOS05 0514 CFBE v0E MOS05 0549 CFDE D0 EC BNE DELA MOS05 0514 CFBE v0E MOS05 0550 CFE0 AE 60 03 LDX NCOLOR MOS05 0514 CFBE v0E MOS05 0551 CFE3 F0 08 BEQ PTTXSP ;TTX space MOS05 0514 CFBE v0E MOS05 0552 CFE5 85 DE STA ZTEMPC ;(A)=0 from ANOMQ MOS05 0514 CFBE v0E MOS05 0553 CFE7 A9 C0 LDAIM HFMSB +&01 ;Point to hard font version of space MOS05 0514 CFBE v0E MOS05 0554 CFE9 85 DF STA ZTEMPC +&01 MOS05 0514 CFBE v0E MOS05 0555 CFEB D0 C2 BNE VDUPRB ;always branch MOS05 0514 CFBE v0E MOS05 0556 CFED MOS05 0514 CFBE v0E MOS05 0557 CFED A9 20 PTTXSP LDAIM &20 ;Print TTX space MOS05 MOS05 MOS05 MOS05 Acorn macro assembler Page 27 MOS05 VDU File - MOS05 MOS05 MOS05 0514 CFBE v0E MOS05 0558 CFEF 38 SEC ;write to screen MOS05 0514 CFBE v0E MOS05 0559 CFF0 PTTX ;C=1 from NOTCEA->VDUPR MOS05 0514 CFBE v0E MOS05 0560 CFF0 TTXFRM ;transform once for ASCII->Teletext, twice for Teletext->ASCII MOS05 0514 CFBE v0E MOS05 0561 CFF0 49 23 EORIM &23 ;is character ASCII &23, hash? MOS05 0514 CFBE v0E MOS05 0562 CFF2 F0 04 BEQ PTTX5F ;then replace with Teletext &5F MOS05 0514 CFBE v0E MOS05 0563 CFF4 49 7C PTTX23 EORIM &23:EOR:&5F ;else is it ASCII &5F, underscore? MOS05 0514 CFBE v0E MOS05 0564 CFF6 F0 04 BEQ PTTX60 ;then replace with Teletext &60 MOS05 0514 CFBE v0E MOS05 0565 CFF8 49 3F PTTX5F EORIM &5F:EOR:&60 ;else is it ASCII &60, sterling? MOS05 0514 CFBE v0E MOS05 0566 CFFA F0 F8 BEQ PTTX23 ;then replace with Teletext &23 (won't loop!) MOS05 0514 CFBE v0E MOS05 0567 CFFC 49 60 PTTX60 EORIM &60 ;else undo our fiddling MOS05 0514 CFBE v0E MOS05 0568 CFFE 90 02 BCC PTTXC ;if C=0 then transform only else C=1, write to screen MOS05 0514 CFBE v0E MOS05 0569 D000 81 D8 STAIX ZMEMT ;as (X)=0 MOS05 0514 CFBE v0E MOS05 0570 D002 PTTXC MOS05 0514 CFBE v0E MOS05 0571 D002 60 RTS MOS05 0514 CFBE v0E MOS05 0572 D003 ] MOS05 0514 CFBE v0E MOS05 0573 D003 MOS05 0514 CFBE v0E MOS05 0574 D003 ;FOUR colour mode MOS05 0514 CFBE v0E MOS05 0575 D003 MOS05 0514 CFBE v0E MOS05 0576 D003 [ MOS125 = &FF MOS05 0514 CFBE v0E MOS05 0603 D003 | MOS05 0514 CFBE v0E MOS05 0604 D003 A8 PFOURA TAY MOS05 0514 CFBE v0E MOS05 0605 D004 88 DEY ;75 MOS05 0514 CFBE v0E MOS05 0606 D005 B1 DE PFOUR LDAIY ZTEMPC ;Get bit pattern MOS05 0514 CFBE v0E MOS05 0607 D007 48 PHA ;Push for L.S.Nybble MOS05 0514 CFBE v0E MOS05 0608 D008 4A LSRA MOS05 0514 CFBE v0E MOS05 0609 D009 4A LSRA MOS05 0514 CFBE v0E MOS05 0610 D00A 4A LSRA MOS05 0514 CFBE v0E MOS05 0611 D00B 4A LSRA ;16 MOS05 0514 CFBE v0E MOS05 0612 D00C AA TAX MOS05 0514 CFBE v0E MOS05 0613 D00D BD 1F C3 LDAAX BPFTB ;Get expanded patten MOS05 0514 CFBE v0E MOS05 0614 D010 05 D2 ORA ZORA ;of M.S.Nybble MOS05 0514 CFBE v0E MOS05 0615 D012 45 D3 EOR ZEOR MOS05 0514 CFBE v0E MOS05 0616 D014 91 D8 STAIY ZMEMT ;34 MOS05 0514 CFBE v0E MOS05 0617 D016 ; same size, reduce stack load MOS05 0514 CFBE v0E MOS05 0618 D016 68 PLA ;Get L.S.Nybble MOS05 0514 CFBE v0E MOS05 0619 D017 29 0F ANDIM &0F MOS05 0514 CFBE v0E MOS05 0620 D019 AA TAX MOS05 0514 CFBE v0E MOS05 0621 D01A 98 TYA MOS05 0514 CFBE v0E MOS05 0622 D01B 49 08 EORIM &08 ;Access next char. cell MOS05 0514 CFBE v0E MOS05 0623 D01D A8 TAY MOS05 0514 CFBE v0E MOS05 0624 D01E BD 1F C3 LDAAX BPFTB ;52 MOS05 0514 CFBE v0E MOS05 0625 D021 05 D2 ORA ZORA MOS05 0514 CFBE v0E MOS05 0626 D023 45 D3 EOR ZEOR MOS05 0514 CFBE v0E MOS05 0627 D025 91 D8 STAIY ZMEMT MOS05 0514 CFBE v0E MOS05 0628 D027 98 TYA MOS05 0514 CFBE v0E MOS05 0629 D028 49 08 EORIM &08 MOS05 0514 CFBE v0E MOS05 0630 D02A D0 D7 BNE PFOURA ;71 MOS05 0514 CFBE v0E MOS05 0631 D02C ;41 MOS05 0514 CFBE v0E MOS05 0632 D02C ] MOS05 0514 CFBE v0E MOS05 0633 D02C 60 PSXTC RTS ;Also used by PSXTN MOS05 0514 CFBE v0E MOS05 0634 D02D MOS05 0514 CFBE v0E MOS05 0635 D02D ;SIXTEEN colour mode MOS05 0514 CFBE v0E MOS05 0636 D02D MOS05 0514 CFBE v0E MOS05 0637 D02D [ MOS125 = &FF MOS05 0514 CFBE v0E MOS05 0662 D02D | MOS05 0514 CFBE v0E MOS05 0663 D02D PSXTB ;Ref.the 1st cell again MOS05 0514 CFBE v0E MOS05 0664 D02D F0 FD BEQ PSXTC ;Finished ? MOS05 0514 CFBE v0E MOS05 0665 D02F A8 TAY ;No, then carry on .. MOS05 0514 CFBE v0E MOS05 0666 D030 88 DEY MOS05 0514 CFBE v0E MOS05 0667 D031 MOS05 0514 CFBE v0E MOS05 0668 D031 B1 DE PSXTN LDAIY ZTEMPC ;Get bit pattern MOS05 0681 D047 ^64 MOS05 0669 D033 0A PSXTA ASLA MOS05 0685 D04E ^63 MOS05 0670 D034 2A ROLA MOS05 0685 D04E ^63 MOS05 0671 D035 85 DC STA ZTEMPB MOS05 0685 D04E ^63 MOS05 0672 D037 29 01 ANDIM &01 MOS05 0685 D04E ^63 MOS05 0673 D039 2A ROLA ;(A)=next 2 bits MOS05 0685 D04E ^63 MOS05 0674 D03A AA TAX ;Get expanded bit pattern MOS05 0685 D04E ^63 MOS05 0675 D03B BD 2F C3 LDAAX BPSTB MOS05 0685 D04E ^63 MOS05 0676 D03E 05 D2 ORA ZORA MOS05 0685 D04E ^63 MOS05 0677 D040 45 D3 EOR ZEOR MOS05 0685 D04E ^63 MOS05 0678 D042 91 D8 STAIY ZMEMT MOS05 0685 D04E ^63 MOS05 0679 D044 98 TYA ;Access next char. cell MOS05 0685 D04E ^63 MOS05 0680 D045 E9 17 SBCIM &17 ;c=0, subtract $18 MOS05 0685 D04E ^63 MOS05 0681 D047 B0 E4 BCS PSXTB MOS05 0685 D04E ^63 MOS05 0682 D049 29 1F ANDIM &1F ;c=0 before & after MOS05 0685 D04E ^63 MOS05 0683 D04B A8 TAY MOS05 0685 D04E ^63 MOS05 0684 D04C A5 DC LDA ZTEMPB MOS05 0685 D04E ^63 MOS05 0685 D04E 90 E3 BCC PSXTA ;(branch always taken) -- MOS05 0686 D050 ] -- MOS05 0687 D050 -- MOS05 0688 D050 ;Addresses character in soft font. -- MOS05 0689 D050 ;Takes (ascii) value in A, multiplies by 8, adds appropriate font address -- MOS05 0690 D050 ;(assumed to be on page boudary), and puts result to ZTEMPC. -- MOS05 0691 D050 ;This addresses top row of character, subsequent rows being in the -- MOS05 0692 D050 ;following 7 bytes. -- MOS05 0693 D050 -- MOS05 0694 D050 [ MOS125 = &FF -- MOS05 0714 D050 | -- MOS05 0715 D050 0A CHADDR ASLA ;ZTEMPC:=8*CHAR. + MSB of font -- MOS05 0716 D051 2A ROLA -- MOS05 0717 D052 2A ROLA -- MOS05 0718 D053 AA TAX -- MOS05 0719 D054 29 F8 ANDIM &F8 -- MOS05 0720 D056 85 DE STA ZTEMPC ;Store LSB of addr. -- MOS05 0721 D058 8A TXA -- MOS05 0722 D059 29 03 ANDIM &03 ;Get page number of character -- MOS05 0723 D05B 2A ROLA -- MOS05 0724 D05C AA TAX -- MOS05 0725 D05D 29 03 ANDIM &03 -- MOS05 0726 D05F 69 BF ADCIM HFMSB ;MSB of hard font - overwrite if soft font (c=0 from last ROLA) -- MOS05 0727 D061 A8 TAY -- MOS05 0728 D062 BD 0D C4 LDAAX BITTBL ;Which bit in the flag byte is to be tested -- MOS05 0729 D065 2C 67 03 BIT FNTFLG ;Test to see if soft or hard font -- MOS05 0730 D068 F0 03 BEQ CHADDS ;Clear, thus hard font MOS05 0730 D068 v7C MOS05 0731 D06A BC 67 03 LDYAX PGSFNT -&01 ;Load soft font page number MOS05 0730 D068 v7C MOS05 0732 D06D 84 DF CHADDS STY ZTEMPC +&01 ;Store MSByte -- MOS05 0733 D06F 60 RTS -- MOS05 0734 D070 ] -- MOS05 0735 D070 LNK MOS06 -- MOS06 0001 D070 -- MOS06 0002 D070 TTL VDU File - MOS06 -- MOS06 0003 D070 OPT MOS06 MOS06 MOS06 MOS06 MOS06 Acorn macro assembler Page 28 MOS06 VDU File - MOS06 MOS06 -- MOS06 0004 D070 -- MOS06 0005 D070 ;Last revision 15/05/82 -- MOS06 0006 D070 -- MOS06 0007 D070 ;15/06/82 Adjust bad plot mode indirection code -- MOS06 0008 D070 ;05/05/82 GADDR converted such that it takes only 1 table. -- MOS06 0009 D070 ; Moved to MOS11 -- MOS06 0010 D070 ;01/05/82 Recode to allow for new order of variables -- MOS06 0011 D070 ;21/04/82 Conditional assembly of start/end point double plotting. -- MOS06 0012 D070 ;22/01/82 Provide EIGABS -- MOS06 0013 D070 ;07/01/82 Put X to LSB of pointer -- MOS06 0014 D070 -- MOS06 0015 D070 ;******* PLOTTING ******* -- MOS06 0016 D070 -- MOS06 0017 D070 ;Prologue - converts from external to internal -- MOS06 0018 D070 ;co-ords, and distinguishes between types of -- MOS06 0019 D070 ;line & triangles -- MOS06 0020 D070 -- MOS06 0021 D070 A2 20 EMA LDXIM NEWPT-V ;Convert external to internal -- MOS06 0022 D072 [ MOS125 = &FF -- MOS06 0025 D072 | -- MOS06 0026 D072 AD 1F 03 LDA PLMODE ;Get plot mode -- MOS06 0027 D075 48 PHA -- MOS06 0028 D076 20 5D D1 JSR EIGC ;for the 4 bytes starting at Q -- MOS06 0029 D079 68 PLA -- MOS06 0030 D07A ] -- MOS06 0031 D07A C9 04 CMPIM &04 ;BASIC's MOVE command -- MOS06 0032 D07C F0 6D BEQ EMAEX MOS06 0032 D07C v12 MOS06 0033 D07E A0 05 LDYIM &05 ;Point to do damn' all mode (for plotting that produces no change) MOS06 0032 D07C v12 MOS06 0034 D080 29 03 ANDIM &03 MOS06 0032 D07C v12 MOS06 0035 D082 F0 0E BEQ EMAA ;No change, then exit MOS06 0032 D07C v12 MOS06 0036 D084 4A LSRA ;Is it odd ? MOS06 0032 D07C v12 MOS06 0037 D085 B0 03 BCS EMAF ;No?, then invert MOS06 0032 D07C v12 MOS06 0038 D087 88 DEY ;(Y) = 4. Point to INVERT values of table MOS06 0032 D07C v12 MOS06 0039 D088 D0 08 BNE EMAA ;(Branch always taken) MOS06 0032 D07C v12 MOS06 0040 D08A AA EMAF TAX MOS06 0032 D07C v12 MOS06 0041 D08B BC 5B 03 LDYAX GPLFMD MOS06 0032 D07C v12 MOS06 0042 D08E BD 59 03 LDAAX FGCOLF MOS06 0032 D07C v12 MOS06 0043 D091 AA TAX MOS06 0032 D07C v12 MOS06 0044 D092 20 C5 D0 EMAA JSR SETZG MOS06 0032 D07C v12 MOS06 0045 D095 MOS06 0032 D07C v12 MOS06 0046 D095 ;What's to be done ? MOS06 0032 D07C v12 MOS06 0047 D095 MOS06 0032 D07C v12 MOS06 0048 D095 AD 1F 03 LDA PLMODE ;Get plot mode MOS06 0032 D07C v12 MOS06 0049 D098 ;* TAY MOS06 0032 D07C v12 MOS06 0050 D098 30 23 BMI EXGREF ;Negative, then reference external routine MOS06 0032 D07C v12 MOS06 0051 D09A 0A ASLA ;Get type of operation MOS06 0032 D07C v12 MOS06 0052 D09B 10 3B BPL EMAD ;Is it a line? MOS06 0032 D07C v12 MOS06 0053 D09D 29 F0 ANDIM &F0 ;Get rid of irrelevant data MOS06 0032 D07C v12 MOS06 0054 D09F 0A ASLA ;Is it point ($80, will be shifted out) ? MOS06 0032 D07C v12 MOS06 0055 D0A0 F0 46 BEQ EMAC MOS06 0032 D07C v12 MOS06 0056 D0A2 49 40 EORIM &40 ;Triangles? MOS06 0032 D07C v12 MOS06 0057 D0A4 F0 14 BEQ EMAG MOS06 0032 D07C v12 MOS06 0058 D0A6 48 PHA MOS06 0032 D07C v12 MOS06 0059 D0A7 20 EE D0 JSR EMAEY ;Copy newpoint to internal cursor MOS06 0032 D07C v12 MOS06 0060 D0AA 68 PLA MOS06 0032 D07C v12 MOS06 0061 D0AB 49 60 EORIM &60 ;SPLOT MOS06 0032 D07C v12 MOS06 0062 D0AD F0 11 BEQ EME ;($60=$20 EOR $40) MOS06 0032 D07C v12 MOS06 0063 D0AF C9 40 CMPIM &40 ;SPLOT looking for b/g ($60 = $40 EOR $60 EOR $40) MOS06 0032 D07C v12 MOS06 0064 D0B1 D0 0A BNE EXGREF MOS06 0032 D07C v12 MOS06 0065 D0B3 A9 02 LDAIM &02 ;This is what is EORed with the flag register MOS06 0032 D07C v12 MOS06 0066 D0B5 85 DC STA ZTEMPB MOS06 0032 D07C v12 MOS06 0067 D0B7 4C BB D4 JMP SCHEAT MOS06 0032 D07C v12 MOS06 0068 D0BA MOS06 0032 D07C v12 MOS06 0069 D0BA 4C 9B D5 EMAG JMP EMC ;Jump to triangles MOS06 0032 D07C v12 MOS06 0070 D0BD EXGREF MOS06 0032 D07C v12 MOS06 0071 D0BD ;* TYA ;Restore plot mode to A MOS06 0032 D07C v12 MOS06 0072 D0BD 4C 0E C9 JMP JMIV25 MOS06 0032 D07C v12 MOS06 0073 D0C0 MOS06 0032 D07C v12 MOS06 0074 D0C0 85 DC EME STA ZTEMPB ;(A)=0 .This is what is EORed with the flag register MOS06 0032 D07C v12 MOS06 0075 D0C2 4C 74 D4 JMP SPLOT ;Fill plot MOS06 0032 D07C v12 MOS06 0076 D0C5 MOS06 0032 D07C v12 MOS06 0077 D0C5 ;Set up ZGORA & ZGEOR, using MOS06 0032 D07C v12 MOS06 0078 D0C5 ;(X)=Full colour byte MOS06 0032 D07C v12 MOS06 0079 D0C5 ;(Y)=Plot mode MOS06 0032 D07C v12 MOS06 0080 D0C5 MOS06 0032 D07C v12 MOS06 0081 D0C5 8A SETZG TXA MOS06 0032 D07C v12 MOS06 0082 D0C6 19 1C C4 ORAAY TBZGOO MOS06 0032 D07C v12 MOS06 0083 D0C9 59 1D C4 EORAY TBZGEO MOS06 0032 D07C v12 MOS06 0084 D0CC 85 D4 STA ZGORA MOS06 0032 D07C v12 MOS06 0085 D0CE 8A TXA MOS06 0032 D07C v12 MOS06 0086 D0CF 19 1B C4 ORAAY TBZGOE MOS06 0032 D07C v12 MOS06 0087 D0D2 59 20 C4 EORAY TBZGEE MOS06 0032 D07C v12 MOS06 0088 D0D5 85 D5 STA ZGEOR MOS06 0032 D07C v12 MOS06 0089 D0D7 60 RTS MOS06 0032 D07C v12 MOS06 0090 D0D8 MOS06 0032 D07C v12 MOS06 0091 D0D8 ;Plot a line or curve MOS06 0032 D07C v12 MOS06 0092 D0D8 MOS06 0032 D07C v12 MOS06 0093 D0D8 0A EMAD ASLA ;Is it a line or curve ? MOS06 0032 D07C v12 MOS06 0094 D0D9 30 E2 BMI EXGREF ;Curve, so reference user routine MOS06 0032 D07C v12 MOS06 0095 D0DB 0A ASLA MOS06 0032 D07C v12 MOS06 0096 D0DC 0A ASLA ;It's a line, so is the first point to be plotted again? MOS06 0032 D07C v12 MOS06 0097 D0DD 10 03 BPL EMAB ;No, then skip this, as routine plots both anyway MOS06 0032 D07C v12 MOS06 0098 D0DF ; MOS06 0032 D07C v12 MOS06 0099 D0DF [ STARTP=0 MOS06 0032 D07C v12 MOS06 0102 D0DF | MOS06 0032 D07C v12 MOS06 0103 D0DF ; plot end point twice MOS06 0032 D07C v12 MOS06 0104 D0DF 20 FD D0 JSR WPLOT MOS06 0032 D07C v12 MOS06 0105 D0E2 ] MOS06 0032 D07C v12 MOS06 0106 D0E2 ; MOS06 0032 D07C v12 MOS06 0107 D0E2 20 C5 D1 EMAB JSR LINE MOS06 0032 D07C v12 MOS06 0108 D0E5 4C EB D0 JMP EMAEX MOS06 0032 D07C v12 MOS06 0109 D0E8 MOS06 0032 D07C v12 MOS06 0110 D0E8 ;Plot a point MOS06 0032 D07C v12 MOS06 0111 D0E8 MOS06 0032 D07C v12 MOS06 0112 D0E8 20 FD D0 EMAC JSR WPLOT ;Plot only if it is in window MOS06 0032 D07C v12 MOS06 0113 D0EB ;SPLOTY requires that EMAEX preserves carry MOS06 0032 D07C v12 MOS06 0114 D0EB 20 D0 CD EMAEX JSR SWAPB ;Swap current cursor with last cursor -- MOS06 0115 D0EE A0 24 EMAEY LDYIM GCSIR-V ;Copy new point to Icursor -- MOS06 0116 D0F0 A2 20 EMAEZ LDXIM NEWPT-V -- MOS06 0117 D0F2 4C 40 D4 JMP COPYF -- MOS06 0118 D0F5 -- MOS06 0119 D0F5 ;WPLOT windows point at NEWPT and plots it if inside -- MOS06 0120 D0F5 -- MOS06 0121 D0F5 A2 24 WPLOTA LDXIM GCSIR-V ;WPLOTA does this to current graphics cursor -- MOS06 0122 D0F7 20 EF D7 JSR GADDV ;WPLOTB does this for any point pointed to by X -- MOS06 0123 D0FA F0 06 BEQ PLOT MOS06 0123 D0FA v79 MOS06 0124 D0FC 60 RTS MOS06 0123 D0FA v79 MOS06 0125 D0FD 20 ED D7 WPLOT JSR GADDW ;Window & address NEWPT MOS06 0123 D0FA v79 MOS06 0126 D100 D0 13 BNE PLOTEX ;Out of window, then exit MOS06 0126 D100 v6C MOS06 0127 D102 MOS06 0126 D100 v6C MOS06 0128 D102 ;otherwise fall through to ..... MOS06 MOS06 MOS06 MOS06 Acorn macro assembler Page 29 MOS06 VDU File - MOS06 MOS06 MOS06 0126 D100 v6C MOS06 0129 D102 MOS06 0126 D100 v6C MOS06 0130 D102 ;PLOT plots a point MOS06 0126 D100 v6C MOS06 0131 D102 ;Requires LINEY, ZMEMG, ZGORA, ZGEOR MOS06 0126 D100 v6C MOS06 0132 D102 ;Uses ZTEMP as work byte MOS06 0126 D100 v6C MOS06 0133 D102 ;Alters 1 byte on screen MOS06 0126 D100 v6C MOS06 0134 D102 MOS06 0126 D100 v6C MOS06 0135 D102 AC 1A 03 PLOT LDY YLINE MOS06 0126 D100 v6C MOS06 0136 D105 A5 D1 PLOTS LDA ZMASK MOS06 0126 D100 v6C MOS06 0137 D107 25 D4 AND ZGORA MOS06 0126 D100 v6C MOS06 0138 D109 11 D6 ORAIY ZMEMG MOS06 0126 D100 v6C MOS06 0139 D10B 85 DA STA ZTEMP MOS06 0126 D100 v6C MOS06 0140 D10D A5 D5 LDA ZGEOR MOS06 0126 D100 v6C MOS06 0141 D10F 25 D1 AND ZMASK MOS06 0126 D100 v6C MOS06 0142 D111 45 DA EOR ZTEMP MOS06 0126 D100 v6C MOS06 0143 D113 91 D6 STAIY ZMEMG MOS06 0126 D100 v6C MOS06 0144 D115 60 PLOTEX RTS -- MOS06 0145 D116 -- MOS06 0146 D116 B1 D6 PLOTFF LDAIY ZMEMG ;Plots a full byte -- MOS06 0147 D118 05 D4 ORA ZGORA -- MOS06 0148 D11A 45 D5 EOR ZGEOR -- MOS06 0149 D11C [ MOS125 = &7F -- MOS06 0150 D11C WRSC -- MOS06 0151 D11C ] -- MOS06 0152 D11C 91 D6 STAIY ZMEMG -- MOS06 0153 D11E 60 RTS -- MOS06 0154 D11F -- MOS06 0155 D11F ;WIND windows the point at V+(X), as follows -- MOS06 0156 D11F ;If the point is below the lower limit, the window is 1 -- MOS06 0157 D11F ;If the point is above the upper limit, the window is 2 -- MOS06 0158 D11F ;If the point is within both limits, the window is 0 -- MOS06 0159 D11F ;The total window, returned in A (with z set appropriately) -- MOS06 0160 D11F ;is 4 times the window in the Y direction, plus the window -- MOS06 0161 D11F ;in the X direction. -- MOS06 0162 D11F ;The routine uses ZTEMP as a work byte -- MOS06 0163 D11F ;All windows, as specified by GWxxxx are reckoned as inclusive, -- MOS06 0164 D11F ;with the high byte last. -- MOS06 0165 D11F ;The order of the windows in RAM is reckoned as follows -- MOS06 0166 D11F ;GWLCOL, GWBROW, GWRCOL, GWTROW -- MOS06 0167 D11F -- MOS06 0168 D11F A2 24 WINDCS LDXIM GCSIR-V ;Special entry point to window graphics cursor -- MOS06 0169 D121 -- MOS06 0170 D121 A0 00 WIND LDYIM &00 ;Initialise result -- MOS06 0171 D123 84 DA STY ZTEMP -- MOS06 0172 D125 A0 02 LDYIM &02 ;Do the Y co-ords -- MOS06 0173 D127 20 3A D1 JSR WINDA -- MOS06 0174 D12A 06 DA ASL ZTEMP ;Mult. the Y window by 4 -- MOS06 0175 D12C 06 DA ASL ZTEMP -- MOS06 0176 D12E CA DEX -- MOS06 0177 D12F CA DEX -- MOS06 0178 D130 A0 00 LDYIM &00 ;Do the X window -- MOS06 0179 D132 20 3A D1 JSR WINDA -- MOS06 0180 D135 E8 INX ;Restore X -- MOS06 0181 D136 E8 INX -- MOS06 0182 D137 A5 DA LDA ZTEMP -- MOS06 0183 D139 60 RTS -- MOS06 0184 D13A -- MOS06 0185 D13A ;Subtract margin from point to obtain sign of difference -- MOS06 0186 D13A -- MOS06 0187 D13A BD 02 03 WINDA LDAAX V+&02 ;(LSB) -- MOS06 0188 D13D D9 00 03 CMPAY GWLCOL ;(LSB of lower limit) -- MOS06 0189 D140 BD 03 03 LDAAX V+&03 ;(MSB) -- MOS06 0190 D143 F9 01 03 SBCAY GWLCOL+&01 ;(MSB of lower limit) -- MOS06 0191 D146 30 10 BMI WINDAA MOS06 0191 D146 v6F MOS06 0192 D148 B9 04 03 LDAAY GWRCOL ;(LSB of upper limit) MOS06 0191 D146 v6F MOS06 0193 D14B DD 02 03 CMPAX V+&02 ;(LSB) MOS06 0191 D146 v6F MOS06 0194 D14E B9 05 03 LDAAY GWRCOL+&01 ;(MSB of upper limit) MOS06 0191 D146 v6F MOS06 0195 D151 FD 03 03 SBCAX V+&03 ;(MSB) MOS06 0191 D146 v6F MOS06 0196 D154 10 04 BPL WINDAB ;Is this <= upper limit ? MOS06 0191 D146 v6F MOS06 0197 D156 E6 DA INC ZTEMP MOS06 0191 D146 v6F MOS06 0198 D158 E6 DA WINDAA INC ZTEMP MOS06 0196 D154 v7B MOS06 0199 D15A 60 WINDAB RTS ;No longer referenced from EIG, incidentally, saving TWO WHOLE BYTES !! -- MOS06 0200 D15B -- MOS06 0201 D15B ;EIGABS in some embarassment is to provide EIG in ABSOLUTE co-ords -- MOS06 0202 D15B -- MOS06 0203 D15B A9 FF EIGABS LDAIM &FF -- MOS06 0204 D15D [ MOS125 = &FF -- MOS06 0206 D15D ] -- MOS06 0207 D15D -- MOS06 0208 D15D ;Convert external to internal co-ordinates -- MOS06 0209 D15D -- MOS06 0210 D15D ;EIG converts from external co-ords (either relative or abs) -- MOS06 0211 D15D ;and produces internal ones in situ. No windowing is done. -- MOS06 0212 D15D ;Requires (X) = the offset from V of the points to be converted -- MOS06 0213 D15D ;b2 of PLMODE = 0 for relative co-ords (add the Ecursor) -- MOS06 0214 D15D ; 1 for absolute co-ords (add the origin) -- MOS06 0215 D15D ;GCSR, ORGX, ORGY as usual -- MOS06 0216 D15D ;Writes the transformed co-ordinates from whence they came -- MOS06 0217 D15D ;Also writes new point to external cursor (GCSX,GCSY) -- MOS06 0218 D15D ;hence in triangle relative mode, the points are relative -- MOS06 0219 D15D ;to the last specified, not the original cursor -- MOS06 0220 D15D -- MOS06 0221 D15D ;a) Add the cursor to current posn. if relative -- MOS06 0222 D15D ;& add origin in both cases -- MOS06 0223 D15D -- MOS06 0224 D15D [ MOS125 = &FF -- MOS06 0226 D15D ] -- MOS06 0227 D15D 85 DA EIGC STA ZTEMP -- MOS06 0228 D15F A0 02 LDYIM &02 ;Do this for Y co-ordinates -- MOS06 0229 D161 20 83 D1 JSR EIGS -- MOS06 0230 D164 20 BA D1 JSR DIVAXT ;1024 points vertically -- MOS06 0231 D167 A0 00 LDYIM &00 -- MOS06 0232 D169 CA DEX -- MOS06 0233 D16A CA DEX -- MOS06 0234 D16B 20 83 D1 JSR EIGS ;Do this for X co-ordinates -- MOS06 0235 D16E -- MOS06 0236 D16E ;b) scale down by the necessary factor -- MOS06 0237 D16E ;(EIGS has already divided by 2) -- MOS06 0238 D16E -- MOS06 0239 D16E AC 61 03 LDY NPIX ;How many pixles ? -- MOS06 0240 D171 C0 03 CPYIM &03 -- MOS06 0241 D173 F0 05 BEQ EIGA ;4?, then divide by 4 MOS06 0241 D173 v7A MOS06 0242 D175 B0 06 BCS EIGB ;8?, then divide by 2 MOS06 0242 D175 v79 MOS06 0243 D177 20 BA D1 JSR DIVAXT ;2?, then divide by 8 MOS06 0242 D175 v79 MOS06 0244 D17A 20 BA D1 EIGA JSR DIVAXT MOS06 0242 D175 v79 MOS06 0245 D17D AD 56 03 EIGB LDA MEMODE ;Is it a 10K mode? -- MOS06 0246 D180 D0 38 BNE DIVAXT ;YES, then another divide by 2 MOS06 0246 D180 v47 MOS06 0247 D182 60 RTS ; NO, then skip MOS06 0246 D180 v47 MOS06 0248 D183 MOS06 0246 D180 v47 MOS06 0249 D183 18 EIGS CLC MOS06 0246 D180 v47 MOS06 0250 D184 A5 DA LDA ZTEMP ;Test b2 of plot mode, for rel./abs. MOS06 0246 D180 v47 MOS06 0251 D186 29 04 ANDIM &04 MOS06 MOS06 MOS06 MOS06 Acorn macro assembler Page 30 MOS06 VDU File - MOS06 MOS06 MOS06 0246 D180 v47 MOS06 0252 D188 F0 09 BEQ EIGSA ;Clear, so relative ( & skip ) MOS06 0246 D180 v47 MOS06 0253 D18A BD 02 03 LDAAX V+&02 ;(LSB) ~~~ ABSOLUTE ~~~ MOS06 0246 D180 v47 MOS06 0254 D18D 48 PHA MOS06 0246 D180 v47 MOS06 0255 D18E BD 03 03 LDAAX V+&03 ;(MSB) MOS06 0246 D180 v47 MOS06 0256 D191 90 0E BCC EIGSB ;(branch always taken) MOS06 0246 D180 v47 MOS06 0257 D193 BD 02 03 EIGSA LDAAX V+&02 ;~~~ RELATIVE ~~~ MOS06 0246 D180 v47 MOS06 0258 D196 79 10 03 ADCAY GCSR ;so add prev. cursor (LSB) MOS06 0246 D180 v47 MOS06 0259 D199 48 PHA MOS06 0246 D180 v47 MOS06 0260 D19A BD 03 03 LDAAX V+&03 ;(MSB) MOS06 0246 D180 v47 MOS06 0261 D19D 79 11 03 ADCAY GCSR+&01 MOS06 0246 D180 v47 MOS06 0262 D1A0 18 CLC MOS06 0246 D180 v47 MOS06 0263 D1A1 99 11 03 EIGSB STAAY GCSR+&01 ;Update MSB of cursor MOS06 0246 D180 v47 MOS06 0264 D1A4 79 0D 03 ADCAY ORG+&01 ;Now add origin for both addressing modes ! MOS06 0246 D180 v47 MOS06 0265 D1A7 9D 03 03 STAAX V+&03 ;(MSB) MOS06 0246 D180 v47 MOS06 0266 D1AA 68 PLA ;Pull LSByte MOS06 0246 D180 v47 MOS06 0267 D1AB 99 10 03 STAAY GCSR ;Update LSB of cursor MOS06 0246 D180 v47 MOS06 0268 D1AE 18 CLC MOS06 0246 D180 v47 MOS06 0269 D1AF 79 0C 03 ADCAY ORG ;(LSB) MOS06 0246 D180 v47 MOS06 0270 D1B2 9D 02 03 STAAX V+&02 MOS06 0246 D180 v47 MOS06 0271 D1B5 90 03 BCC DIVAXT MOS06 0246 D180 v47 MOS06 0272 D1B7 FE 03 03 INCAX V+&03 ;Carry into MSB if needs be MOS06 0246 D180 v47 MOS06 0273 D1BA MOS06 0246 D180 v47 MOS06 0274 D1BA ;Divide this by 2 by falling through to ... MOS06 0246 D180 v47 MOS06 0275 D1BA MOS06 0246 D180 v47 MOS06 0276 D1BA BD 03 03 DIVAXT LDAAX V+&03 ;Signed division by 2 -- MOS06 0277 D1BD 0A ASLA ;(Screen now 1280 by 1024) -- MOS06 0278 D1BE 7E 03 03 RORAX V+&03 -- MOS06 0279 D1C1 7E 02 03 RORAX V+&02 -- MOS06 0280 D1C4 [ MOS125 = &FF -- MOS06 0281 D1C4 | -- MOS06 0282 D1C4 LINEX1 -- MOS06 0283 D1C4 ] -- MOS06 0284 D1C4 60 RTS MOS07 0127 D23B ^07 MOS06 0285 D1C5 MOS07 0127 D23B ^07 MOS06 0286 D1C5 [ MOS125 = &FF MOS07 0127 D23B ^07 MOS06 0315 D1C5 ] MOS07 0127 D23B ^07 MOS06 0316 D1C5 MOS07 0127 D23B ^07 MOS06 0317 D1C5 LNK MOS07 MOS07 0127 D23B ^07 MOS07 0001 D1C5 TTL VDU File - MOS07 MOS07 0127 D23B ^07 MOS07 0002 D1C5 OPT MOS07 MOS07 MOS07 MOS07 MOS07 Acorn macro assembler Page 31 MOS07 VDU File - MOS07 MOS07 MOS07 0127 D23B ^07 MOS07 0003 D1C5 MOS07 0127 D23B ^07 MOS07 0004 D1C5 ;Last revision 01/05/82 MOS07 0127 D23B ^07 MOS07 0005 D1C5 MOS07 0127 D23B ^07 MOS07 0006 D1C5 ;01/05/82 Recoded to allow for new order of variables & manifests MOS07 0127 D23B ^07 MOS07 0007 D1C5 ;21/04/82 LINE rewritten MOS07 0127 D23B ^07 MOS07 0008 D1C5 ;19/04/82 One byte saved in SB MOS07 0127 D23B ^07 MOS07 0009 D1C5 ;25/03/82 Change all refs. to BEGSCN+1 to BEGSCN MOS07 0127 D23B ^07 MOS07 0010 D1C5 ;14/11/81 Variable mark space on DOTS removed MOS07 0127 D23B ^07 MOS07 0011 D1C5 MOS07 0127 D23B ^07 MOS07 0012 D1C5 ;******* PLOTTING ******* MOS07 0127 D23B ^07 MOS07 0013 D1C5 MOS07 0127 D23B ^07 MOS07 0014 D1C5 ;LINE plots straight line from cursor to new point MOS07 0127 D23B ^07 MOS07 0015 D1C5 ;taking account windowing, & plotting partial lines MOS07 0127 D23B ^07 MOS07 0016 D1C5 ;if necessary MOS07 0127 D23B ^07 MOS07 0017 D1C5 MOS07 0127 D23B ^07 MOS07 0018 D1C5 ;Requires GCSIR = the current cursor position (I co-ords) MOS07 0127 D23B ^07 MOS07 0019 D1C5 ;NEWPT = the point to plotted to (I co-ords) MOS07 0127 D23B ^07 MOS07 0020 D1C5 ;Windowing is assumed of neither MOS07 0127 D23B ^07 MOS07 0021 D1C5 MOS07 0127 D23B ^07 MOS07 0022 D1C5 MOS07 0127 D23B ^07 MOS07 0023 D1C5 ;Plot a straight line MOS07 0127 D23B ^07 MOS07 0024 D1C5 MOS07 0127 D23B ^07 MOS07 0025 D1C5 20 C3 D3 LINE JSR LINSA ;Find DeltaX & DeltaY to LDELTA MOS07 0127 D23B ^07 MOS07 0026 D1C8 ;LINSB Returns n=1 iff MOD DeltaX < MOD DeltaY MOS07 0127 D23B ^07 MOS07 0027 D1C8 ;Encoded version of a previous routine MOS07 0127 D23B ^07 MOS07 0028 D1C8 MOS07 0127 D23B ^07 MOS07 0029 D1C8 AD 2B 03 LDA LDELTA+&03 ;DY, MSB Are the deltas of the same sign? MOS07 0127 D23B ^07 MOS07 0030 D1CB [ MOS125 = &FF MOS07 0127 D23B ^07 MOS07 0043 D1CB | MOS07 0127 D23B ^07 MOS07 0044 D1CB AA TAX MOS07 0127 D23B ^07 MOS07 0045 D1CC 4D 29 03 EOR LDELTA+&01 ;DX, MSB MOS07 0127 D23B ^07 MOS07 0046 D1CF 0A ASLA MOS07 0127 D23B ^07 MOS07 0047 D1D0 AD 2A 03 LDA LDELTA+&02 MOS07 0127 D23B ^07 MOS07 0048 D1D3 B0 0A BCS LINSBA MOS07 0127 D23B ^07 MOS07 0049 D1D5 CD 28 03 CMP LDELTA ;YES, then compare DeltaY - DeltaX MOS07 0127 D23B ^07 MOS07 0050 D1D8 8A TXA MOS07 0127 D23B ^07 MOS07 0051 D1D9 ED 29 03 SBC LDELTA+&01 MOS07 0127 D23B ^07 MOS07 0052 D1DC 4C E7 D1 JMP LINSBB MOS07 0127 D23B ^07 MOS07 0053 D1DF 18 LINSBA CLC ;NO, then add MOS07 0127 D23B ^07 MOS07 0054 D1E0 6D 28 03 ADC LDELTA MOS07 0127 D23B ^07 MOS07 0055 D1E3 8A TXA MOS07 0127 D23B ^07 MOS07 0056 D1E4 6D 29 03 ADC LDELTA+&01 MOS07 0127 D23B ^07 MOS07 0057 D1E7 ] MOS07 0127 D23B ^07 MOS07 0058 D1E7 6A LINSBB RORA ;c to b7 of A MOS07 0127 D23B ^07 MOS07 0059 D1E8 A2 00 LDXIM &00 MOS07 0127 D23B ^07 MOS07 0060 D1EA 4D 2B 03 EOR LDELTA+&03 ;If DY < 0, then invert b7 of A. Sets n as required MOS07 0127 D23B ^07 MOS07 0061 D1ED ; MOS07 0127 D23B ^07 MOS07 0062 D1ED 10 02 BPL LINEA MOS07 0127 D23B ^07 MOS07 0063 D1EF A2 02 LDXIM &02 MOS07 0127 D23B ^07 MOS07 0064 D1F1 86 DE LINEA STX ZTEMPC ;0 if p.b.X, 2 if p.b.Y MOS07 0127 D23B ^07 MOS07 0065 D1F3 BD AA C4 LDAAX D1JTB ;JVEC initialisation (D1 jump vector) MOS07 0127 D23B ^07 MOS07 0066 D1F6 8D 5D 03 STA JVEC MOS07 0127 D23B ^07 MOS07 0067 D1F9 BD AB C4 LDAAX D1JTB+&01 MOS07 0127 D23B ^07 MOS07 0068 D1FC 8D 5E 03 STA JVEC+&01 MOS07 0127 D23B ^07 MOS07 0069 D1FF [ MOS125 = &FF MOS07 0127 D23B ^07 MOS07 0076 D1FF | MOS07 0127 D23B ^07 MOS07 0077 D1FF A9 24 LDAIM GCSIR-V ;+ve, then LSTART from GCSIR... MOS07 0127 D23B ^07 MOS07 0078 D201 BC 29 03 LDYAX LDELTA+&01 ;Sign of D1 MOS07 0127 D23B ^07 MOS07 0079 D204 30 02 BMI LINEC MOS07 0127 D23B ^07 MOS07 0080 D206 A9 20 LDAIM NEWPT-V ;Copy LSTART from new point MOS07 0127 D23B ^07 MOS07 0081 D208 85 DF LINEC STA ZTEMPC+&01 ;Offset of LSTART (=PStart of old) MOS07 0127 D23B ^07 MOS07 0082 D20A AA TAX MOS07 0127 D23B ^07 MOS07 0083 D20B ] MOS07 0127 D23B ^07 MOS07 0084 D20B A0 2C LDYIM LSTART-V ;Copy to LSTART MOS07 0127 D23B ^07 MOS07 0085 D20D 20 40 D4 JSR COPYF MOS07 0127 D23B ^07 MOS07 0086 D210 A5 DF LDA ZTEMPC+&01 ;Get Horizontal co-ordinate of other (end) point MOS07 0127 D23B ^07 MOS07 0087 D212 49 04 EORIM &04 ;This requires NEWPT to be multiple of 8 & GCSIR 4 above it MOS07 0127 D23B ^07 MOS07 0088 D214 85 DD STA ZTEMPB+&01 MOS07 0127 D23B ^07 MOS07 0089 D216 05 DE ORA ZTEMPC ;Get Hend (horizontal co-ordinate of endpoint) MOS07 0127 D23B ^07 MOS07 0090 D218 AA TAX MOS07 0127 D23B ^07 MOS07 0091 D219 20 36 D4 JSR COPY2H MOS07 0127 D23B ^07 MOS07 0092 D21C [ MOS125 = &FF MOS07 0127 D23B ^07 MOS07 0107 D21C | MOS07 0127 D23B ^07 MOS07 0108 D21C A2 2C LDXIM LSTART-V ;Window start point LSTART MOS07 0127 D23B ^07 MOS07 0109 D21E 20 21 D1 JSR WIND MOS07 0127 D23B ^07 MOS07 0110 D221 85 DC STA ZTEMPB MOS07 0127 D23B ^07 MOS07 0111 D223 C9 01 CMPIM &01 ;C=1 iff start point not inside MOS07 0127 D23B ^07 MOS07 0112 D225 AD 1F 03 LDA PLMODE ;Initialise dotted line test MOS07 0127 D23B ^07 MOS07 0113 D228 29 10 ANDIM &10 ;Isolate b4 MOS07 0127 D23B ^07 MOS07 0114 D22A F0 02 BEQ LINED MOS07 0127 D23B ^07 MOS07 0115 D22C A9 80 LDAIM &80 ;now $80 if plot dotted line, $00 if full line MOS07 0127 D23B ^07 MOS07 0116 D22E 90 02 LINED BCC LINEL MOS07 0127 D23B ^07 MOS07 0117 D230 09 40 ORAIM &40 ;Start point not inside, so slow plot MOS07 0127 D23B ^07 MOS07 0118 D232 85 DB LINEL STA ZTEMP+&01 MOS07 0127 D23B ^07 MOS07 0119 D234 A6 DD LDX ZTEMPB+&01 ;Window other point MOS07 0127 D23B ^07 MOS07 0120 D236 ] MOS07 0127 D23B ^07 MOS07 0121 D236 20 21 D1 JSR WIND MOS07 0127 D23B ^07 MOS07 0122 D239 24 DC BIT ZTEMPB ;Anything to do ? MOS07 0127 D23B ^07 MOS07 0123 D23B [ MOS125 = &FF MOS07 0127 D23B ^07 MOS07 0126 D23B | MOS07 0127 D23B ^07 MOS07 0127 D23B D0 87 BNE LINEX1 ;No, then exit -- MOS07 0128 D23D ] -- MOS07 0129 D23D A6 DE LINEE LDX ZTEMPC ;Isolate 2nd horizontal window -- MOS07 0130 D23F F0 02 BEQ LINEF MOS07 0130 D23F v7D MOS07 0131 D241 4A LSRA MOS07 0130 D23F v7D MOS07 0132 D242 4A LSRA MOS07 0130 D23F v7D MOS07 0133 D243 29 02 LINEF ANDIM &02 -- MOS07 0134 D245 F0 07 BEQ LINEG ;Zero, so Hend is in window MOS07 0134 D245 v78 MOS07 0135 D247 8A TXA ;Point X to upper margin! MOS07 0134 D245 v78 MOS07 0136 D248 09 04 ORAIM GWRCOL-V ;Assumes GWLCOL-V is a multiple of 4 MOS07 0134 D245 v78 MOS07 0137 D24A AA TAX ;Endpoint outside horizontal window, MOS07 0134 D245 v78 MOS07 0138 D24B 20 36 D4 JSR COPY2H ;so alter Hend to high margin MOS07 0134 D245 v78 MOS07 0139 D24E 20 E2 D3 LINEG JSR LINSG ;Get L values & MOD deltas -- MOS07 0140 D251 A5 DE LDA ZTEMPC -- MOS07 0141 D253 49 02 EORIM &02 -- MOS07 0142 D255 AA TAX ;Unsigned D2 -- MOS07 0143 D256 A8 TAY -- MOS07 0144 D257 AD 29 03 LDA LDELTA+&01 ;Sign of D2 ? -- MOS07 0145 D25A 4D 2B 03 EOR LDELTA+&03 -- MOS07 0146 D25D 10 01 BPL LINEH MOS07 0146 D25D v7E MOS07 0147 D25F E8 INX ;Signed D2 - E,W,N,S MOS07 0146 D25D v7E MOS07 0148 D260 BD AE C4 LINEH LDAAX D2JTBL ;Initialise D2 jump vector -- MOS07 0149 D263 8D 32 03 STA D2JVEC -- MOS07 0150 D266 BD B2 C4 LDAAX D2JTBH -- MOS07 0151 D269 8D 33 03 STA D2JVEC+&01 -- MOS07 0152 D26C A9 7F LDAIM &7F ;dotted line initialisation -- MOS07 0153 D26E 8D 34 03 STA DOTFLG -- MOS07 0154 D271 24 DB BIT ZTEMP+&01 -- MOS07 0155 D273 70 29 BVS LINEI ;Slow plot , so set ZTEMPC strangely MOS07 0155 D273 v56 MOS07 0156 D275 BD 47 C4 LDAAX EWTBA ;(4,0,6,2) Calculate V points MOS07 0155 D273 v56 MOS07 0157 D278 AA TAX MOS07 MOS07 MOS07 MOS07 Acorn macro assembler Page 32 MOS07 VDU File - MOS07 MOS07 MOS07 0155 D273 v56 MOS07 0158 D279 38 SEC MOS07 0155 D273 v56 MOS07 0159 D27A BD 00 03 LDAAX GWLCOL MOS07 0155 D273 v56 MOS07 0160 D27D F9 2C 03 SBCAY LSTART MOS07 0155 D273 v56 MOS07 0161 D280 85 DA STA ZTEMP MOS07 0155 D273 v56 MOS07 0162 D282 BD 01 03 LDAAX GWLCOL+&01 MOS07 0155 D273 v56 MOS07 0163 D285 F9 2D 03 SBCAY LSTART+&01 MOS07 0155 D273 v56 MOS07 0164 D288 A4 DA LDY ZTEMP MOS07 0155 D273 v56 MOS07 0165 D28A AA TAX ;Ensure +ve MOS07 0155 D273 v56 MOS07 0166 D28B 10 04 BPL LINEH1 MOS07 0155 D273 v56 MOS07 0167 D28D 20 51 D4 JSR NEGAY MOS07 0155 D273 v56 MOS07 0168 D290 [ MOS125 = &FF MOS07 0155 D273 v56 MOS07 0170 D290 | MOS07 0155 D273 v56 MOS07 0171 D290 AA TAX ;MSB of no. V points MOS07 0155 D273 v56 MOS07 0172 D291 LINEH1 MOS07 0155 D273 v56 MOS07 0173 D291 ] MOS07 0155 D273 v56 MOS07 0174 D291 C8 INY ;Increment this no. MOS07 0155 D273 v56 MOS07 0175 D292 D0 01 BNE LINEH2 MOS07 0155 D273 v56 MOS07 0176 D294 E8 INX MOS07 0155 D273 v56 MOS07 0177 D295 8A LINEH2 TXA ;MSB non-zero ? MOS07 0155 D273 v56 MOS07 0178 D296 F0 02 BEQ LINEH3 MOS07 0155 D273 v56 MOS07 0179 D298 A0 00 LDYIM &00 ;Yes, then no limit to no. of vertical points MOS07 0155 D273 v56 MOS07 0180 D29A 84 DF LINEH3 STY ZTEMPC+&01 ; Zero is always set here MOS07 0155 D273 v56 MOS07 0181 D29C F0 09 BEQ LINEJ1 MOS07 0155 D273 v56 MOS07 0182 D29E 8A LINEI TXA ;b7 = sign of D2. b1=D2 MOS07 0181 D29C v76 MOS07 0183 D29F 4A LSRA MOS07 0181 D29C v76 MOS07 0184 D2A0 6A RORA MOS07 0181 D29C v76 MOS07 0185 D2A1 09 02 ORAIM &02 MOS07 0181 D29C v76 MOS07 0186 D2A3 45 DE EOR ZTEMPC MOS07 0181 D29C v76 MOS07 0187 D2A5 85 DE STA ZTEMPC MOS07 0181 D29C v76 MOS07 0188 D2A7 A2 2C LINEJ1 LDXIM LSTART-V ;Address the first point -- MOS07 0189 D2A9 20 F4 D7 JSR GADDR ;Now loads YLINE to Y -- MOS07 0190 D2AC A6 DC LDX ZTEMPB -- MOS07 0191 D2AE D0 02 BNE LINEN MOS07 0191 D2AE v7D MOS07 0192 D2B0 C6 DD DEC ZTEMPB+&01 MOS07 0191 D2AE v7D MOS07 0193 D2B2 CA LINEN DEX -- MOS07 0194 D2B3 ; -- MOS07 0195 D2B3 ; Fall through to main plot routine -- MOS07 0196 D2B3 ; -- MOS07 0197 D2B3 A5 DB LINEJ LDA ZTEMP +&01 ;Was midpoint or DOTS referenced ? -- MOS07 0198 D2B5 F0 1F BEQ DOTYES ;No?, then run along MOS07 0198 D2B5 v60 MOS07 0199 D2B7 10 10 BPL MPTEST ;No, then do midpoint test MOS07 0198 D2B5 v60 MOS07 0200 D2B9 2C 34 03 BIT DOTFLG ;b7 set, then dotted MOS07 0198 D2B5 v60 MOS07 0201 D2BC 10 05 BPL DOTY ;Branch if last was a space MOS07 0198 D2B5 v60 MOS07 0202 D2BE CE 34 03 DEC DOTFLG ;now to $7F MOS07 0198 D2B5 v60 MOS07 0203 D2C1 D0 23 BNE DOTNO ;(branch always taken) MOS07 0203 D2C1 v5C MOS07 0204 D2C3 EE 34 03 DOTY INC DOTFLG ;to $80 MOS07 0203 D2C1 v5C MOS07 0205 D2C6 0A ASLA MOS07 0203 D2C1 v5C MOS07 0206 D2C7 10 0D BPL DOTYES ;No?, then plot the point MOS07 0203 D2C1 v5C MOS07 0207 D2C9 86 DC MPTEST STX ZTEMPB ;Store X temporarily MOS07 0203 D2C1 v5C MOS07 0208 D2CB A2 2C LDXIM LSTART-V ;Window the point at Q +0D (PStart) MOS07 0203 D2C1 v5C MOS07 0209 D2CD 20 EF D7 JSR GADDV ;& address if window was successful MOS07 0203 D2C1 v5C MOS07 0210 D2D0 A6 DC LDX ZTEMPB ;Restore X MOS07 0203 D2C1 v5C MOS07 0211 D2D2 09 00 ORAIM &00 ;To TSTA (a la 6800) (result of window) MOS07 0203 D2C1 v5C MOS07 0212 D2D4 D0 10 BNE DOTNO ;Outside?, then skip the plot MOS07 0203 D2C1 v5C MOS07 0213 D2D6 A5 D1 DOTYES LDA ZMASK ;Plot the point MOS07 0203 D2C1 v5C MOS07 0214 D2D8 25 D4 AND ZGORA MOS07 0203 D2C1 v5C MOS07 0215 D2DA 11 D6 ORAIY ZMEMG MOS07 0203 D2C1 v5C MOS07 0216 D2DC 85 DA STA ZTEMP MOS07 0203 D2C1 v5C MOS07 0217 D2DE A5 D5 LDA ZGEOR MOS07 0203 D2C1 v5C MOS07 0218 D2E0 25 D1 AND ZMASK MOS07 0203 D2C1 v5C MOS07 0219 D2E2 45 DA EOR ZTEMP MOS07 0203 D2C1 v5C MOS07 0220 D2E4 91 D6 STAIY ZMEMG MOS07 0203 D2C1 v5C MOS07 0221 D2E6 MOS07 0203 D2C1 v5C MOS07 0222 D2E6 ;L := L - DeltaV MOS07 0203 D2C1 v5C MOS07 0223 D2E6 MOS07 0203 D2C1 v5C MOS07 0224 D2E6 38 DOTNO SEC -- MOS07 0225 D2E7 AD 35 03 LDA LPARMS ;L,LSB -- MOS07 0226 D2EA ED 37 03 SBC LPARMS+&02 ;DeltaV,LSB -- MOS07 0227 D2ED 8D 35 03 STA LPARMS -- MOS07 0228 D2F0 AD 36 03 LDA LPARMS+&01 ;L,MSB -- MOS07 0229 D2F3 ED 38 03 SBC LPARMS+&03 ;DeltaV,MSB -- MOS07 0230 D2F6 B0 11 BCS LINED1 ;Skip if D2 not to be taken ( L > 0 ) MOS07 0230 D2F6 v6E MOS07 0231 D2F8 85 DA STA ZTEMP ;D2 must be taken, thus MOS07 0230 D2F6 v6E MOS07 0232 D2FA AD 35 03 LDA LPARMS ;L := L + DeltaH MOS07 0230 D2F6 v6E MOS07 0233 D2FD 6D 39 03 ADC LPARMS+&04 ;LSB of DeltaH (c=0) MOS07 0230 D2F6 v6E MOS07 0234 D300 8D 35 03 STA LPARMS MOS07 0230 D2F6 v6E MOS07 0235 D303 A5 DA LDA ZTEMP MOS07 0230 D2F6 v6E MOS07 0236 D305 6D 3A 03 ADC LPARMS+&05 ;MSB of DeltaH MOS07 0230 D2F6 v6E MOS07 0237 D308 18 CLC ;Do do D2 MOS07 0230 D2F6 v6E MOS07 0238 D309 8D 36 03 LINED1 STA LPARMS+&01 ;Store MSB of L, preserving c -- MOS07 0239 D30C 08 PHP ;Needed for decrementing no. of V points -- MOS07 0240 D30D B0 09 BCS LINEE1 ;Don't do D2 if you're not meant to MOS07 0240 D30D v76 MOS07 0241 D30F 6C 32 03 JMI D2JVEC ;Jump to D2, through JVEC2, to xB (below) MOS07 0240 D30D v76 MOS07 0242 D312 88 NB DEY MOS07 0240 D30D v76 MOS07 0243 D313 10 03 BPL LINEE1 ;~~~~~~~~~~~~~~ D2 KING MOVES ~~~~~~~~~~~~~~ MOS07 0240 D30D v76 MOS07 0244 D315 20 ED CB JSR NBDY MOS07 0240 D30D v76 MOS07 0245 D318 6C 5D 03 LINEE1 JMI JVEC MOS07 0266 D346 ^50 MOS07 0246 D31B C8 SB INY MOS07 0266 D346 ^50 MOS07 0247 D31C C0 08 CPYIM &08 MOS07 0266 D346 ^50 MOS07 0248 D31E D0 F8 BNE LINEE1 MOS07 0266 D346 ^50 MOS07 0249 D320 18 CLC ; encoded version of SBDY MOS07 0266 D346 ^50 MOS07 0250 D321 A5 D6 LDA ZMEMG MOS07 0266 D346 ^50 MOS07 0251 D323 6D 52 03 ADC BYTROW MOS07 0266 D346 ^50 MOS07 0252 D326 85 D6 STA ZMEMG MOS07 0266 D346 ^50 MOS07 0253 D328 A5 D7 LDA ZMEMG +&01 MOS07 0266 D346 ^50 MOS07 0254 D32A 6D 53 03 ADC BYTROW +&01 MOS07 0266 D346 ^50 MOS07 0255 D32D 10 04 BPL SBDYA MOS07 0266 D346 ^50 MOS07 0256 D32F 38 SEC MOS07 0266 D346 ^50 MOS07 0257 D330 ED 54 03 SBC BYTSCN MOS07 0266 D346 ^50 MOS07 0258 D333 85 D7 SBDYA STA ZMEMG +&01 MOS07 0266 D346 ^50 MOS07 0259 D335 A0 00 LDYIM &00 MOS07 0266 D346 ^50 MOS07 0260 D337 6C 5D 03 JMI JVEC MOS07 0266 D346 ^50 MOS07 0261 D33A 46 D1 EB LSR ZMASK MOS07 0266 D346 ^50 MOS07 0262 D33C 90 DA BCC LINEE1 MOS07 0266 D346 ^50 MOS07 0263 D33E 20 A3 D3 JSR EBDY MOS07 0266 D346 ^50 MOS07 0264 D341 6C 5D 03 JMI JVEC MOS07 0266 D346 ^50 MOS07 0265 D344 06 D1 WB ASL ZMASK MOS07 0266 D346 ^50 MOS07 0266 D346 90 D0 BCC LINEE1 -- MOS07 0267 D348 20 B3 D3 JSR WBDY -- MOS07 0268 D34B 6C 5D 03 JMI JVEC -- MOS07 0269 D34E 88 NA DEY -- MOS07 0270 D34F 10 0C BPL LINEF1 ;~~~~~~~~~~~~~~ D1 KING MOVES ~~~~~~~~~~~~~~ MOS07 0270 D34F v73 MOS07 0271 D351 20 ED CB JSR NBDY MOS07 0270 D34F v73 MOS07 0272 D354 D0 07 BNE LINEF1 ; NBDY returns Zero false MOS07 0270 D34F v73 MOS07 0273 D356 46 D1 EA LSR ZMASK MOS07 0270 D34F v73 MOS07 0274 D358 90 03 BCC LINEF1 MOS07 0270 D34F v73 MOS07 0275 D35A 20 A3 D3 JSR EBDY MOS07 0270 D34F v73 MOS07 0276 D35D 28 LINEF1 PLP ;Did D2 occur ? Result to c (c=0 if it did) -- MOS07 0277 D35E E8 INX ;Inc no. H points left to plot (following preserves c) -- MOS07 0278 D35F D0 04 BNE LINEG1 MOS07 0278 D35F v7B MOS07 0279 D361 E6 DD INC ZTEMPB +&01 MOS07 MOS07 MOS07 MOS07 Acorn macro assembler Page 33 MOS07 VDU File - MOS07 MOS07 MOS07 0278 D35F v7B MOS07 0280 D363 F0 0A BEQ LINEX ;Zero?, then exit MOS07 0280 D363 v75 MOS07 0281 D365 24 DB LINEG1 BIT ZTEMP +&01 ;Was midpoint referenced? (preserves c) MOS07 0280 D363 v75 MOS07 0282 D367 70 07 BVS FRIGA ;Yes, then go to the nasty bit MOS07 0280 D363 v75 MOS07 0283 D369 B0 35 BCS LINEK ;D2 ?, then test V window. c from last PLP MOS07 0283 D369 v4A MOS07 0284 D36B C6 DF DEC ZTEMPC +&01 ;Off V window ?, then exit MOS07 0283 D369 v4A MOS07 0285 D36D D0 31 BNE LINEK MOS07 0283 D369 v4A MOS07 0286 D36F 60 LINEX RTS MOS07 0283 D369 v4A MOS07 0287 D370 A5 DE FRIGA LDA ZTEMPC ;Which direction was D2 ? MOS07 0283 D369 v4A MOS07 0288 D372 86 DC STX ZTEMPB MOS07 0283 D369 v4A MOS07 0289 D374 29 02 ANDIM &02 MOS07 0283 D369 v4A MOS07 0290 D376 AA TAX MOS07 0283 D369 v4A MOS07 0291 D377 B0 19 BCS FRIGC ;No D2?, then skip the adjustment of V MOS07 0283 D369 v4A MOS07 0292 D379 24 DE BIT ZTEMPC ;Was D2 +ve ? MOS07 0283 D369 v4A MOS07 0293 D37B 30 0A BMI FRIGB MOS07 0283 D369 v4A MOS07 0294 D37D FE 2C 03 INCAX LSTART ;D2 +ve, so increment V co-ord MOS07 0283 D369 v4A MOS07 0295 D380 D0 10 BNE FRIGC MOS07 0283 D369 v4A MOS07 0296 D382 FE 2D 03 INCAX LSTART+&01 MOS07 0283 D369 v4A MOS07 0297 D385 90 0B BCC FRIGC ;(branch always taken) MOS07 0283 D369 v4A MOS07 0298 D387 BD 2C 03 FRIGB LDAAX LSTART ;D2 -ve, so dec. the V co-ord. MOS07 0283 D369 v4A MOS07 0299 D38A D0 03 BNE FRIGF MOS07 0283 D369 v4A MOS07 0300 D38C DE 2D 03 DECAX LSTART+&01 MOS07 0283 D369 v4A MOS07 0301 D38F DE 2C 03 FRIGF DECAX LSTART MOS07 0283 D369 v4A MOS07 0302 D392 8A FRIGC TXA ;Get offset of D1 MOS07 0283 D369 v4A MOS07 0303 D393 49 02 EORIM &02 MOS07 0283 D369 v4A MOS07 0304 D395 AA TAX MOS07 0283 D369 v4A MOS07 0305 D396 FE 2C 03 INCAX LSTART ;D1 +ve,so inc. H co-ord MOS07 0283 D369 v4A MOS07 0306 D399 D0 03 BNE FRIGD MOS07 0283 D369 v4A MOS07 0307 D39B FE 2D 03 INCAX LSTART+&01 MOS07 0283 D369 v4A MOS07 0308 D39E A6 DC FRIGD LDX ZTEMPB MOS07 0283 D369 v4A MOS07 0309 D3A0 4C B3 D2 LINEK JMP LINEJ -- MOS07 0310 D3A3 -- MOS07 0311 D3A3 ;BOUNDARY ROUTINES -- MOS07 0312 D3A3 -- MOS07 0313 D3A3 [ MOS125 = &FF -- MOS07 0329 D3A3 ] -- MOS07 0330 D3A3 -- MOS07 0331 D3A3 ;EAST -- MOS07 0332 D3A3 -- MOS07 0333 D3A3 AD 62 03 EBDY LDA MASKL -- MOS07 0334 D3A6 85 D1 STA ZMASK -- MOS07 0335 D3A8 A5 D6 LDA ZMEMG -- MOS07 0336 D3AA 69 07 ADCIM &07 ;c=1 from branch not taken to call this -- MOS07 0337 D3AC 85 D6 STA ZMEMG -- MOS07 0338 D3AE 90 02 BCC EBDYA MOS07 0338 D3AE v7D MOS07 0339 D3B0 E6 D7 INC ZMEMG +&01 MOS07 0338 D3AE v7D MOS07 0340 D3B2 60 EBDYA RTS -- MOS07 0341 D3B3 -- MOS07 0342 D3B3 ;WEST -- MOS07 0343 D3B3 -- MOS07 0344 D3B3 AD 63 03 WBDY LDA MASKR ;encoded version of WBDY -- MOS07 0345 D3B6 85 D1 STA ZMASK -- MOS07 0346 D3B8 A5 D6 LDA ZMEMG -- MOS07 0347 D3BA D0 02 BNE WBDYA MOS07 0347 D3BA v7D MOS07 0348 D3BC C6 D7 DEC ZMEMG +&01 MOS07 0347 D3BA v7D MOS07 0349 D3BE E9 08 WBDYA SBCIM &08 ;c=1 from failure of BCC -- MOS07 0350 D3C0 85 D6 STA ZMEMG -- MOS07 0351 D3C2 60 RTS -- MOS07 0352 D3C3 -- MOS07 0353 D3C3 LNK MOS08 -- MOS08 0001 D3C3 -- MOS08 0002 D3C3 TTL VDU File - MOS08 -- MOS08 0003 D3C3 OPT MOS08 MOS08 MOS08 MOS08 MOS08 Acorn macro assembler Page 34 MOS08 VDU File - MOS08 MOS08 -- MOS08 0004 D3C3 -- MOS08 0005 D3C3 ;Last revision 18/05/82 -- MOS08 0006 D3C3 ; -- MOS08 0007 D3C3 ;18/05/82 External graphics cursor now updated on exit of SPLOT -- MOS08 0008 D3C3 ;04/05/82 SPLOT routine entered -- MOS08 0009 D3C3 ;01/05/82 Recoded using new variable order & manifests -- MOS08 0010 D3C3 ;21/04/82 Most of this deleted ! LINSG modified for new LINE routine -- MOS08 0011 D3C3 ;19/04/82 Byte saving in LINSCE -- MOS08 0012 D3C3 -- MOS08 0013 D3C3 ;LINSA calculates Delta X & Delta Y -- MOS08 0014 D3C3 ;(New point - cursor), where both are in Ico-ords -- MOS08 0015 D3C3 ;Max. I value always assumed to be $8000, as arithmetic -- MOS08 0016 D3C3 ;is performed in 2's comp., 16 bit -- MOS08 0017 D3C3 ;New point in NEWPT, results to LDELTA -- MOS08 0018 D3C3 -- MOS08 0019 D3C3 A0 28 LINSA LDYIM LDELTA-V ;Offset of results from V -- MOS08 0020 D3C5 A2 20 LDXIM NEWPT-V ;Offset of operands, from V -- MOS08 0021 D3C7 -- MOS08 0022 D3C7 ;fall through to ....... -- MOS08 0023 D3C7 -- MOS08 0024 D3C7 ;TRISA calculates Delta X & Delta Y for operands starting -- MOS08 0025 D3C7 ;at V+(X), and results to V+(Y). Calculation from -- MOS08 0026 D3C7 ;(Point at (V+(X)+4)) - (Point at (V+(X))) -- MOS08 0027 D3C7 -- MOS08 0028 D3C7 20 CE D3 TRISA JSR TRISAA -- MOS08 0029 D3CA E8 INX -- MOS08 0030 D3CB E8 INX -- MOS08 0031 D3CC C8 INY -- MOS08 0032 D3CD C8 INY -- MOS08 0033 D3CE 38 TRISAA SEC -- MOS08 0034 D3CF BD 04 03 LDAAX V+&04 -- MOS08 0035 D3D2 FD 00 03 SBCAX V -- MOS08 0036 D3D5 99 00 03 STAAY V -- MOS08 0037 D3D8 BD 05 03 LDAAX V+&05 -- MOS08 0038 D3DB FD 01 03 SBCAX V+&01 -- MOS08 0039 D3DE 99 01 03 STAAY V+&01 -- MOS08 0040 D3E1 60 RTS -- MOS08 0041 D3E2 -- MOS08 0042 D3E2 ;LINSG calculates no. H points before H exit -- MOS08 0043 D3E2 ;putting 2's comp. to ZTEMPB,ZTEMPB +01 (LSB 1st). -- MOS08 0044 D3E2 ;Initialises MOD DELTAs & L -- MOS08 0045 D3E2 ;Requires ZTEMPB as usual, destroying original data -- MOS08 0046 D3E2 -- MOS08 0047 D3E2 A5 DE LINSG LDA ZTEMPC ;Calc. MOD DELTAs. -- MOS08 0048 D3E4 D0 07 BNE LINSGB ;Plot by Y, so straight copy MOS08 0048 D3E4 v78 MOS08 0049 D3E6 A2 28 LDXIM LDELTA-V ;Swap DeltaX & DeltaY MOS08 0048 D3E4 v78 MOS08 0050 D3E8 A0 2A LDYIM LDELTA+&02-V MOS08 0048 D3E4 v78 MOS08 0051 D3EA 20 CC CD JSR SWAP2 MOS08 0048 D3E4 v78 MOS08 0052 D3ED A2 28 LINSGB LDXIM LDELTA-V ;Copy from modified DX & DY (now DH & DV) -- MOS08 0053 D3EF A0 37 LDYIM LPARMS+&02-V ;to LPARMS+2=LDELTA -- MOS08 0054 D3F1 20 40 D4 JSR COPYF ;Copy 4 bytes -- MOS08 0055 D3F4 -- MOS08 0056 D3F4 ;Initialise No. H points -- MOS08 0057 D3F4 -- MOS08 0058 D3F4 38 SEC -- MOS08 0059 D3F5 A6 DE LDX ZTEMPC -- MOS08 0060 D3F7 AD 30 03 LDA HEND ;He, LSB -- MOS08 0061 D3FA FD 2C 03 SBCAX LSTART ;HSt, LSB -- MOS08 0062 D3FD A8 TAY -- MOS08 0063 D3FE AD 31 03 LDA HEND+&01 ;He, MSB -- MOS08 0064 D401 FD 2D 03 SBCAX LSTART+&01 ;HSt, MSB -- MOS08 0065 D404 30 03 BMI LINSGA ;Ensure in 2's comp. MOS08 0065 D404 v7C MOS08 0066 D406 20 51 D4 JSR NEGAY MOS08 0065 D404 v7C MOS08 0067 D409 85 DD LINSGA STA ZTEMPB +&01 -- MOS08 0068 D40B 84 DC STY ZTEMPB -- MOS08 0069 D40D -- MOS08 0070 D40D ;now initialise L & MODULO the DH & DV -- MOS08 0071 D40D -- MOS08 0072 D40D A2 35 LDXIM LPARMS-V ;Point to the deltas -- MOS08 0073 D40F -- MOS08 0074 D40F ;& fall through to ... -- MOS08 0075 D40F -- MOS08 0076 D40F ;TRISB Set up L & MODULO deltas. -- MOS08 0077 D40F ;Assumes V+(X) points to LL,LH,DVL,DVH,DHL,DHH -- MOS08 0078 D40F ;Sets all Dxy to ABS in situ. Sets L := DH/2 (2 byte arith) -- MOS08 0079 D40F -- MOS08 0080 D40F 20 1D D4 TRISB JSR TRISBA ;Do DH -- MOS08 0081 D412 4A LSRA -- MOS08 0082 D413 9D 01 03 STAAX V+&01 ;Initialise LH -- MOS08 0083 D416 98 TYA ;Now do LL -- MOS08 0084 D417 6A RORA -- MOS08 0085 D418 9D 00 03 STAAX V -- MOS08 0086 D41B CA DEX ;Now DV -- MOS08 0087 D41C CA DEX -- MOS08 0088 D41D BC 04 03 TRISBA LDYAX V+&04 ;LSB -- MOS08 0089 D420 BD 05 03 LDAAX V+&05 ;MSB -- MOS08 0090 D423 10 0C BPL TRISBB ;Find ABS value MOS08 0090 D423 v73 MOS08 0091 D425 20 51 D4 JSR NEGAY MOS08 0090 D423 v73 MOS08 0092 D428 9D 05 03 STAAX V+&05 ;PAIN - why the hell isn't there a STYAX on this wretched chip ?? MOS08 0090 D423 v73 MOS08 0093 D42B 48 PHA MOS08 0090 D423 v73 MOS08 0094 D42C 98 TYA MOS08 0090 D423 v73 MOS08 0095 D42D 9D 04 03 STAAX V+&04 MOS08 0090 D423 v73 MOS08 0096 D430 68 PLA MOS08 0090 D423 v73 MOS08 0097 D431 60 TRISBB RTS -- MOS08 0098 D432 -- MOS08 0099 D432 -- MOS08 0100 D432 ;COPYF copies 4 bytes from (V)+(X) to (V)+(Y) -- MOS08 0101 D432 -- MOS08 0102 D432 A9 08 COPY8 LDAIM &08 -- MOS08 0103 D434 D0 0C BNE COPY MOS08 0103 D434 v73 MOS08 0104 D436 MOS08 0103 D434 v73 MOS08 0105 D436 A0 30 COPY2H LDYIM HEND-V MOS08 0103 D434 v73 MOS08 0106 D438 A9 02 COPY2 LDAIM &02 MOS08 0103 D434 v73 MOS08 0107 D43A D0 06 BNE COPY MOS08 0103 D434 v73 MOS08 0108 D43C MOS08 0103 D434 v73 MOS08 0109 D43C A0 28 COPYFA LDYIM APCS1-V MOS08 0103 D434 v73 MOS08 0110 D43E A2 24 COPYFB LDXIM GCSIR-V MOS08 0103 D434 v73 MOS08 0111 D440 A9 04 COPYF LDAIM &04 ;SPLOTY requires that c preserved MOS08 0103 D434 v73 MOS08 0112 D442 85 DA COPY STA ZTEMP -- MOS08 0113 D444 BD 00 03 COPYA LDAAX V MOS08 0118 D44E ^74 MOS08 0114 D447 99 00 03 STAAY V MOS08 0118 D44E ^74 MOS08 0115 D44A E8 INX MOS08 0118 D44E ^74 MOS08 0116 D44B C8 INY MOS08 0118 D44E ^74 MOS08 0117 D44C C6 DA DEC ZTEMP MOS08 0118 D44E ^74 MOS08 0118 D44E D0 F4 BNE COPYA -- MOS08 0119 D450 60 RTS -- MOS08 0120 D451 -- MOS08 0121 D451 48 NEGAY PHA ;Negate (AY) - push MSB -- MOS08 0122 D452 98 TYA -- MOS08 0123 D453 49 FF EORIM &FF -- MOS08 0124 D455 A8 TAY MOS08 MOS08 MOS08 MOS08 Acorn macro assembler Page 35 MOS08 VDU File - MOS08 MOS08 -- MOS08 0125 D456 68 PLA -- MOS08 0126 D457 49 FF EORIM &FF -- MOS08 0127 D459 [ MOS125 = &FF -- MOS08 0133 D459 | -- MOS08 0134 D459 C0 FF CPYIM &FF -- MOS08 0135 D45B C8 INY -- MOS08 0136 D45C 69 00 ADCIM &00 -- MOS08 0137 D45E 60 RTS -- MOS08 0138 D45F ] -- MOS08 0139 D45F -- MOS08 0140 D45F 20 ED D7 SPF JSR GADDW ;Address new point COMMON CODE -- MOS08 0141 D462 D0 08 BNE SPFA ;Off window?, then exit MOS08 0141 D462 v77 MOS08 0142 D464 B1 D6 LDAIY ZMEMG ;Get the current byte MOS08 0141 D462 v77 MOS08 0143 D466 4D 5A 03 EOR BGCOLF ;Set b/g pixels to zero MOS08 0141 D462 v77 MOS08 0144 D469 85 DA STA ZTEMP MOS08 0141 D462 v77 MOS08 0145 D46B 60 RTS MOS08 0141 D462 v77 MOS08 0146 D46C 68 SPFA PLA -- MOS08 0147 D46D 68 PLA -- MOS08 0148 D46E -- MOS08 0149 D46E ; & fall through to -- MOS08 0150 D46E -- MOS08 0151 D46E EE 26 03 SPLOTY INC GCSIY ;Failed, so make the L.H. cursor > R.H. MOS08 0162 D479 ^73 MOS08 0152 D471 4C FA D4 JMP SPLOTX MOS08 0162 D479 ^73 MOS08 0153 D474 MOS08 0162 D479 ^73 MOS08 0154 D474 ;SPLOT plots from the new point left & right MOS08 0162 D479 ^73 MOS08 0155 D474 ; until it finds a pixel which is NOT background colour MOS08 0162 D479 ^73 MOS08 0156 D474 ; It scans a byte at a time if possible, taking a lot MOS08 0162 D479 ^73 MOS08 0157 D474 ; of code. MOS08 0162 D479 ^73 MOS08 0158 D474 MOS08 0162 D479 ^73 MOS08 0159 D474 MOS08 0162 D479 ^73 MOS08 0160 D474 20 5F D4 SPLOT JSR SPF MOS08 0162 D479 ^73 MOS08 0161 D477 25 D1 AND ZMASK ;Is the new point in b/g? MOS08 0162 D479 ^73 MOS08 0162 D479 D0 F3 BNE SPLOTY ;No?, then exit -- MOS08 0163 D47B A2 00 LDXIM &00 ;Set up for plotting to the left -- MOS08 0164 D47D 20 43 D5 JSR SPS ;Corrupts all registers -- MOS08 0165 D480 F0 2D BEQ SPLOTE ;Nothing to do MOS08 0165 D480 v52 MOS08 0166 D482 AC 1A 03 LDY YLINE MOS08 0165 D480 v52 MOS08 0167 D485 06 D1 ASL ZMASK ;Don't want to plot the midpoint again MOS08 0165 D480 v52 MOS08 0168 D487 B0 05 BCS SPLOTB ;So move left MOS08 0165 D480 v52 MOS08 0169 D489 20 2D D5 JSR SPB ;Plot the LH fractional byte MOS08 0165 D480 v52 MOS08 0170 D48C 90 21 BCC SPLOTE ;No complete bytes to attempt? MOS08 0165 D480 v52 MOS08 0171 D48E MOS08 0165 D480 v52 MOS08 0172 D48E 20 B3 D3 SPLOTB JSR WBDY ;Do complete bytes left MOS08 0165 D480 v52 MOS08 0173 D491 B1 D6 LDAIY ZMEMG ;(NB WBDY assumes c=1) MOS08 0165 D480 v52 MOS08 0174 D493 4D 5A 03 EOR BGCOLF MOS08 0165 D480 v52 MOS08 0175 D496 85 DA STA ZTEMP MOS08 0165 D480 v52 MOS08 0176 D498 D0 12 BNE SPLOTD ;Not a complete byte of b/g? MOS08 0165 D480 v52 MOS08 0177 D49A 38 SEC ;Go for next byte - add to pixel counter MOS08 0165 D480 v52 MOS08 0178 D49B 8A TXA MOS08 0165 D480 v52 MOS08 0179 D49C 6D 61 03 ADC NPIX MOS08 0165 D480 v52 MOS08 0180 D49F 90 04 BCC SPLOTC MOS08 0165 D480 v52 MOS08 0181 D4A1 E6 DB INC ZTEMP+&01 ;MSB of pixel counter MOS08 0165 D480 v52 MOS08 0182 D4A3 10 07 BPL SPLOTD ;Reached margin? Then skip MOS08 0165 D480 v52 MOS08 0183 D4A5 AA SPLOTC TAX ;Not reached margin - then MOS08 0165 D480 v52 MOS08 0184 D4A6 20 16 D1 JSR PLOTFF MOS08 0165 D480 v52 MOS08 0185 D4A9 38 SEC ;carry on MOS08 0165 D480 v52 MOS08 0186 D4AA B0 E2 BCS SPLOTB ;(branch always taken). Sorry about the last comment MOS08 0165 D480 v52 MOS08 0187 D4AC MOS08 0165 D480 v52 MOS08 0188 D4AC 20 2D D5 SPLOTD JSR SPB ;Do whatever is right of the line MOS08 0165 D480 v52 MOS08 0189 D4AF A0 00 SPLOTE LDYIM &00 ;Translate back to Ico-ords -- MOS08 0190 D4B1 20 5D D5 JSR SPU -- MOS08 0191 D4B4 -- MOS08 0192 D4B4 A0 20 LDYIM NEWPT-V ;Entry point for look for b/g colour -- MOS08 0193 D4B6 A2 24 LDXIM GCSIR-V ;Swap newpoint (in GCSIR) & calculated RH endpoint -- MOS08 0194 D4B8 20 D4 CD JSR SWAPF -- MOS08 0195 D4BB -- MOS08 0196 D4BB 20 5F D4 SCHEAT JSR SPF ;Address midpoint again held in NEWPT -- MOS08 0197 D4BE A2 04 LDXIM &04 ;Set up for plotting right -- MOS08 0198 D4C0 20 43 D5 JSR SPS ;Musn't corrupt ZTEMP -- MOS08 0199 D4C3 8A TXA ;Plot the midpoint -- MOS08 0200 D4C4 D0 02 BNE SPLOTA MOS08 0200 D4C4 v7D MOS08 0201 D4C6 C6 DB DEC ZTEMP+&01 MOS08 0200 D4C4 v7D MOS08 0202 D4C8 CA SPLOTA DEX -- MOS08 0203 D4C9 -- MOS08 0204 D4C9 20 00 D5 SPLOTL JSR SPA ;Do this RH fractional byte MOS08 0213 D4DA ^6D MOS08 0205 D4CC 90 27 BCC SPLOTK ;No full bytes to attempt? MOS08 0205 D4CC v58 MOS08 0206 D4CE MOS08 0205 D4CC v58 MOS08 0207 D4CE 20 A3 D3 SPLOTI JSR EBDY ;Full bytes right MOS08 0205 D4CC v58 MOS08 0208 D4D1 B1 D6 LDAIY ZMEMG MOS08 0205 D4CC v58 MOS08 0209 D4D3 4D 5A 03 EOR BGCOLF MOS08 0205 D4CC v58 MOS08 0210 D4D6 85 DA STA ZTEMP MOS08 0205 D4CC v58 MOS08 0211 D4D8 MOS08 0205 D4CC v58 MOS08 0212 D4D8 A5 DC LDA ZTEMPB MOS08 0205 D4CC v58 MOS08 0213 D4DA D0 ED BNE SPLOTL MOS08 0205 D4CC v58 MOS08 0214 D4DC MOS08 0205 D4CC v58 MOS08 0215 D4DC A5 DA LDA ZTEMP MOS08 0205 D4CC v58 MOS08 0216 D4DE D0 12 BNE SPLOTJ ;This isn't a full byte MOS08 0205 D4CC v58 MOS08 0217 D4E0 38 SEC ;Add (NPIX)+1=no.pixels to counter MOS08 0205 D4CC v58 MOS08 0218 D4E1 8A TXA MOS08 0205 D4CC v58 MOS08 0219 D4E2 6D 61 03 ADC NPIX MOS08 0205 D4CC v58 MOS08 0220 D4E5 90 04 BCC SPLOTF MOS08 0205 D4CC v58 MOS08 0221 D4E7 E6 DB INC ZTEMP+&01 MOS08 0205 D4CC v58 MOS08 0222 D4E9 10 07 BPL SPLOTJ ;Skip if hit margin MOS08 0205 D4CC v58 MOS08 0223 D4EB AA SPLOTF TAX MOS08 0205 D4CC v58 MOS08 0224 D4EC 20 16 D1 JSR PLOTFF MOS08 0205 D4CC v58 MOS08 0225 D4EF 38 SEC MOS08 0205 D4CC v58 MOS08 0226 D4F0 B0 DC BCS SPLOTI ;(branch always taken) MOS08 0205 D4CC v58 MOS08 0227 D4F2 MOS08 0205 D4CC v58 MOS08 0228 D4F2 20 00 D5 SPLOTJ JSR SPA MOS08 0205 D4CC v58 MOS08 0229 D4F5 A0 04 SPLOTK LDYIM &04 ;Convert to address of LH endpoint -- MOS08 0230 D4F7 20 5D D5 JSR SPU -- MOS08 0231 D4FA 20 EB D0 SPLOTX JSR EMAEX ;Finished -- MOS08 0232 D4FD 4C 7D CA JMP IEG ;update external cursor -- MOS08 0233 D500 -- MOS08 0234 D500 ;SPA Plots fractional LH byte on RH line end -- MOS08 0235 D500 -- MOS08 0236 D500 A5 D1 SPA LDA ZMASK ;Push the initial combined mask -- MOS08 0237 D502 [ MOS125 = &FF -- MOS08 0239 D502 ] -- MOS08 0240 D502 18 CLC -- MOS08 0241 D503 90 0E BCC SPAF ;(branch always taken) MOS08 0241 D503 v71 MOS08 0242 D505 MOS08 0241 D503 v71 MOS08 0243 D505 68 SPAA PLA ;Try next pixel - pull combined mask MOS08 0271 D51E ^65 MOS08 0244 D506 E8 INX ;Increment the pixel counter MOS08 0271 D51E ^65 MOS08 0245 D507 D0 04 BNE SPAB MOS08 0271 D51E ^65 MOS08 0246 D509 E6 DB INC ZTEMP+&01 MOS08 0271 D51E ^65 MOS08 0247 D50B 10 16 BPL SPAE ;Exit if all pixels plotted MOS08 0271 D51E ^65 MOS08 0248 D50D 46 D1 SPAB LSR ZMASK ;Shift mask MOS08 0271 D51E ^65 MOS08 0249 D50F B0 12 BCS SPAE ;Exit if shifted out of character cell MOS08 0271 D51E ^65 MOS08 0250 D511 05 D1 ORA ZMASK ;Continue forming combined mask MOS08 0271 D51E ^65 MOS08 0251 D513 [ MOS125 = &FF MOS08 MOS08 MOS08 MOS08 Acorn macro assembler Page 36 MOS08 VDU File - MOS08 MOS08 MOS08 0271 D51E ^65 MOS08 0254 D513 | MOS08 0271 D51E ^65 MOS08 0255 D513 48 SPAF PHA ;& push it again MOS08 0271 D51E ^65 MOS08 0256 D514 A5 D1 LDA ZMASK ;START HERE MOS08 0271 D51E ^65 MOS08 0257 D516 ] MOS08 0271 D51E ^65 MOS08 0258 D516 24 DA BIT ZTEMP ;Is this pixel b/g colour ? MOS08 0271 D51E ^65 MOS08 0259 D518 MOS08 0271 D51E ^65 MOS08 0260 D518 08 PHP ;Invert z flag if needs be MOS08 0271 D51E ^65 MOS08 0261 D519 68 PLA MOS08 0271 D51E ^65 MOS08 0262 D51A 45 DC EOR ZTEMPB ;By inverting it with ZTEMPB (0 or 2) MOS08 0271 D51E ^65 MOS08 0263 D51C [ MOS125 = &FF MOS08 0271 D51E ^65 MOS08 0268 D51C | MOS08 0271 D51E ^65 MOS08 0269 D51C 29 02 ANDIM &02 ;No shorter but saves 5 cycles and ZTEMPB can't corrupt PSR MOS08 0271 D51E ^65 MOS08 0270 D51E MOS08 0271 D51E ^65 MOS08 0271 D51E D0 E5 BNE SPAA ;Z now inverted, NE means NOT background, so loop MOS08 0247 D50B v69 MOS08 0272 D520 ] MOS08 0247 D50B v69 MOS08 0273 D520 68 PLA ;Found it?, then pull combined mask MOS08 0247 D50B v69 MOS08 0274 D521 45 D1 EOR ZMASK ;& delete this pixel from it MOS08 0247 D50B v69 MOS08 0275 D523 85 D1 SPAE STA ZMASK ;These must preserve c! MOS08 0320 D541 ^60 MOS08 0276 D525 4C 02 D1 JMP PLOT MOS08 0320 D541 ^60 MOS08 0277 D528 MOS08 0320 D541 ^60 MOS08 0278 D528 [ MOS125 = &FF MOS08 0320 D541 ^60 MOS08 0301 D528 | MOS08 0320 D541 ^60 MOS08 0302 D528 SPBD MOS08 0320 D541 ^60 MOS08 0303 D528 45 D1 EOR ZMASK MOS08 0320 D541 ^60 MOS08 0304 D52A 4A LSRA MOS08 0320 D541 ^60 MOS08 0305 D52B 90 F6 BCC SPAE ;(branch always taken) MOS08 0320 D541 ^60 MOS08 0306 D52D MOS08 0320 D541 ^60 MOS08 0307 D52D ;SPB Plots fractional RH byte on LH line end MOS08 0320 D541 ^60 MOS08 0308 D52D MOS08 0320 D541 ^60 MOS08 0309 D52D A9 00 SPB LDAIM &00 MOS08 0320 D541 ^60 MOS08 0310 D52F 0A SPBE ASLA ;CC preserved via SPAE->PLOT and seen by caller MOS08 0320 D541 ^60 MOS08 0311 D530 05 D1 ORA ZMASK MOS08 0320 D541 ^60 MOS08 0312 D532 24 DA BIT ZTEMP MOS08 0320 D541 ^60 MOS08 0313 D534 D0 F2 BNE SPBD MOS08 0320 D541 ^60 MOS08 0314 D536 E8 INX MOS08 0320 D541 ^60 MOS08 0315 D537 D0 04 BNE SPBB MOS08 0320 D541 ^60 MOS08 0316 D539 E6 DB INC ZTEMP+&01 MOS08 0320 D541 ^60 MOS08 0317 D53B 10 E6 BPL SPAE MOS08 0320 D541 ^60 MOS08 0318 D53D C9 80 SPBB CMPIM &80 MOS08 0320 D541 ^60 MOS08 0319 D53F 90 EE BCC SPBE MOS08 0320 D541 ^60 MOS08 0320 D541 B0 E0 BCS SPAE ;(branch always taken) -- MOS08 0321 D543 ] -- MOS08 0322 D543 -- MOS08 0323 D543 ;SPS Set up pixel counter -- MOS08 0324 D543 -- MOS08 0325 D543 BD 00 03 SPS LDAAX GWLCOL -- MOS08 0326 D546 38 SEC -- MOS08 0327 D547 ED 20 03 SBC NEWPT -- MOS08 0328 D54A A8 TAY -- MOS08 0329 D54B BD 01 03 LDAAX GWLCOL+&01 -- MOS08 0330 D54E ED 21 03 SBC NEWPT+&01 -- MOS08 0331 D551 30 03 BMI SPSA ;Ensure this is -ve MOS08 0331 D551 v7C MOS08 0332 D553 20 51 D4 JSR NEGAY MOS08 0331 D551 v7C MOS08 0333 D556 85 DB SPSA STA ZTEMP+&01 ;Store MSB -- MOS08 0334 D558 98 TYA -- MOS08 0335 D559 AA TAX ;LSB to X -- MOS08 0336 D55A 05 DB ORA ZTEMP+&01 ;Set z=1 if nothing to do -- MOS08 0337 D55C 60 RTS -- MOS08 0338 D55D -- MOS08 0339 D55D ;SPU Work out the internal co-ordinates of where we are -- MOS08 0340 D55D -- MOS08 0341 D55D 84 DA SPU STY ZTEMP -- MOS08 0342 D55F 8A TXA -- MOS08 0343 D560 A8 TAY -- MOS08 0344 D561 A5 DB LDA ZTEMP+&01 -- MOS08 0345 D563 30 02 BMI SPUA ;This byte is $00 at most MOS08 0345 D563 v7D MOS08 0346 D565 A9 00 LDAIM &00 ;although it can get a $01 in it MOS08 0345 D563 v7D MOS08 0347 D567 A6 DA SPUA LDX ZTEMP -- MOS08 0348 D569 D0 03 BNE SPUB MOS08 0348 D569 v7C MOS08 0349 D56B 20 51 D4 JSR NEGAY MOS08 0348 D569 v7C MOS08 0350 D56E 48 SPUB PHA -- MOS08 0351 D56F 18 CLC -- MOS08 0352 D570 98 TYA -- MOS08 0353 D571 7D 00 03 ADCAX GWLCOL -- MOS08 0354 D574 8D 20 03 STA NEWPT -- MOS08 0355 D577 68 PLA -- MOS08 0356 D578 7D 01 03 ADCAX GWLCOL+&01 -- MOS08 0357 D57B 8D 21 03 STA NEWPT+&01 -- MOS08 0358 D57E 60 RTS -- MOS08 0359 D57F -- MOS08 0360 D57F CSREAD -- MOS08 0361 D57F A9 03 LDAIM &03 ;Convert internal co-ordiantes at OLDCS & GCSIR -- MOS08 0362 D581 20 86 D5 JSR SPCA -- MOS08 0363 D584 A9 07 LDAIM &07 -- MOS08 0364 D586 48 SPCA PHA -- MOS08 0365 D587 20 D0 CD JSR SWAPB ;Swap old cursor with cursor -- MOS08 0366 D58A 20 7D CA JSR IEG ;Convert to external co-ordiantes -- MOS08 0367 D58D A2 03 LDXIM &03 ;& copy it -- MOS08 0368 D58F 68 PLA -- MOS08 0369 D590 A8 TAY -- MOS08 0370 D591 BD 10 03 SPCB LDAAX GCSR MOS08 0374 D598 ^77 MOS08 0371 D594 91 F0 STAIY WARGS MOS08 0374 D598 ^77 MOS08 0372 D596 88 DEY MOS08 0374 D598 ^77 MOS08 0373 D597 CA DEX MOS08 0374 D598 ^77 MOS08 0374 D598 10 F7 BPL SPCB -- MOS08 0375 D59A 60 RTS -- MOS08 0376 D59B -- MOS08 0377 D59B LNK MOS10 -- MOS10 0001 D59B -- MOS10 0002 D59B TTL VDU File - MOS10 -- MOS10 0003 D59B OPT MOS10 MOS10 MOS10 MOS10 MOS10 Acorn macro assembler Page 37 MOS10 VDU File - MOS10 MOS10 -- MOS10 0004 D59B -- MOS10 0005 D59B ;Last revision 10/05/82 -- MOS10 0006 D59B -- MOS10 0007 D59B ;10/05/82 Save 1 byte by BCS HPLOT -> BCC TRSRTS -- MOS10 0008 D59B ;05/05/82 HPLOT uses PLOTFF -- MOS10 0009 D59B ;01/05/82 Recoded using manifests & new ordering of static variables -- MOS10 0010 D59B ;07/02/82 Zero height triangles not so disasterous (GPT) -- MOS10 0011 D59B -- MOS10 0012 D59B ;TRIANGLE PLOTTING -- MOS10 0013 D59B -- MOS10 0014 D59B ;INITIALISATION -- MOS10 0015 D59B -- MOS10 0016 D59B A2 20 EMC LDXIM NEWPT-V ;Copy new point & graphics cursor to a safe place -- MOS10 0017 D59D A0 3E LDYIM GCSTMP-V -- MOS10 0018 D59F 20 32 D4 JSR COPY8 -- MOS10 0019 D5A2 20 ED CD JSR SORTA ;Sort into Y co-ords, in order NEWPT=Lo, GCSIR=Hi, OLDCS=Med -- MOS10 0020 D5A5 A2 14 LDXIM OLDCS-V -- MOS10 0021 D5A7 A0 24 LDYIM GCSIR-V -- MOS10 0022 D5A9 20 F1 CD JSR SORTY -- MOS10 0023 D5AC 20 ED CD JSR SORTA -- MOS10 0024 D5AF A2 20 LDXIM NEWPT-V ;Set paramters for hypotenuse ... -- MOS10 0025 D5B1 A0 2A LDYIM HDELTA-V ;Find Deltas -- MOS10 0026 D5B3 20 C7 D3 JSR TRISA -- MOS10 0027 D5B6 AD 2B 03 LDA HDELTA+&01 ;Copy sign of DeltaX to determine direction -- MOS10 0028 D5B9 8D 32 03 STA HDIREC -- MOS10 0029 D5BC A2 28 LDXIM HPARMS -- MOS10 0030 D5BE 20 0F D4 JSR TRISB ;complete definition of hypotenuse parameters -- MOS10 0031 D5C1 A0 2E LDYIM HSTART-V ;Copy NEWPT to PStart of hypotenuse -- MOS10 0032 D5C3 20 F0 D0 JSR EMAEZ -- MOS10 0033 D5C6 ;Swap Y co-ords 2 & 3, to give 1st side -- MOS10 0034 D5C6 20 D0 CD JSR SWAPB ;Y co-ords now in order Lo, Med, Hi -- MOS10 0035 D5C9 18 CLC ;Don't plot the last line -- MOS10 0036 D5CA 20 F4 D5 JSR TRSF ;Do the lower half of the triangle -- MOS10 0037 D5CD ;Swap points to enable set up of 2nd side -- MOS10 0038 D5CD 20 D0 CD JSR SWAPB ;Y co-ords now Lo, Hi, Med -- MOS10 0039 D5D0 A2 20 LDXIM NEWPT-V ;swap Y co-ords 1 & 3 to give 2nd side -- MOS10 0040 D5D2 20 D2 CD JSR SWAPC ;& now Med, Hi, Lo -- MOS10 0041 D5D5 38 SEC ;Do plot the last line -- MOS10 0042 D5D6 20 F4 D5 JSR TRSF ;& plot the top half -- MOS10 0043 D5D9 A2 3E LDXIM GCSTMP-V ;Restore original graphics cursor & new point -- MOS10 0044 D5DB A0 20 LDYIM NEWPT-V -- MOS10 0045 D5DD 20 32 D4 JSR COPY8 -- MOS10 0046 D5E0 4C EB D0 JMP EMAEX ;& do things to the cursors -- MOS10 0047 D5E3 -- MOS10 0048 D5E3 [ MOS125 = &FF -- MOS10 0059 D5E3 ] -- MOS10 0060 D5E3 -- MOS10 0061 D5E3 CSRPOS -- MOS10 0062 D5E3 AD 18 03 LDA CSX ;~~~ Read text cursor position ~~~ -- MOS10 0063 D5E6 38 SEC -- MOS10 0064 D5E7 ED 08 03 SBC TWLCOL -- MOS10 0065 D5EA AA TAX -- MOS10 0066 D5EB AD 19 03 LDA CSY -- MOS10 0067 D5EE 38 SEC -- MOS10 0068 D5EF ED 0B 03 SBC TWTROW -- MOS10 0069 D5F2 A8 TAY -- MOS10 0070 D5F3 60 TRSRTS RTS ;No, then return MOS10 0109 D63C ^35 MOS10 0071 D5F4 MOS10 0109 D63C ^35 MOS10 0072 D5F4 ;TRSF Initialises a parameter list for ULN MOS10 0109 D63C ^35 MOS10 0073 D5F4 ;Sets up the "sides" (as opposed to the hypoteneuse) only. Skips if MOS10 0109 D63C ^35 MOS10 0074 D5F4 ;the 2 Y values are equal, otherwise calls HPLOT & ULN the requisite MOS10 0109 D63C ^35 MOS10 0075 D5F4 ;number of times MOS10 0109 D63C ^35 MOS10 0076 D5F4 ;Assumes the points forming the side to be initialised are in MOS10 0109 D63C ^35 MOS10 0077 D5F4 ;NEWPT & GCSIR MOS10 0109 D63C ^35 MOS10 0078 D5F4 MOS10 0109 D63C ^35 MOS10 0079 D5F4 08 TRSF PHP ;Push carry - is set if last line is to be plotted MOS10 0109 D63C ^35 MOS10 0080 D5F5 A2 20 LDXIM NEWPT-V ;Set up triangle parameters MOS10 0109 D63C ^35 MOS10 0081 D5F7 A0 35 LDYIM SDELTA-V ;Find deltas (sides only) MOS10 0109 D63C ^35 MOS10 0082 D5F9 20 C7 D3 JSR TRISA MOS10 0109 D63C ^35 MOS10 0083 D5FC AD 36 03 LDA SDELTA+&01 ;Find direction by sign of DeltaX MOS10 0109 D63C ^35 MOS10 0084 D5FF 8D 3D 03 STA SDIREC MOS10 0109 D63C ^35 MOS10 0085 D602 A2 33 LDXIM SPARMS-V ;Find MOD Deltas, and initialise L MOS10 0109 D63C ^35 MOS10 0086 D604 20 0F D4 JSR TRISB MOS10 0109 D63C ^35 MOS10 0087 D607 A0 39 LDYIM SSTART-V ;Copy NEWPT to SSTART MOS10 0109 D63C ^35 MOS10 0088 D609 20 F0 D0 JSR EMAEZ MOS10 0109 D63C ^35 MOS10 0089 D60C 38 SEC ;How many Y values are there to be done ? MOS10 0109 D63C ^35 MOS10 0090 D60D AD 22 03 LDA NEWPT+&02 MOS10 0109 D63C ^35 MOS10 0091 D610 ED 26 03 SBC GCSIY MOS10 0109 D63C ^35 MOS10 0092 D613 8D 1B 03 STA TRINLN ;Result (2's comp.) to TRINLN MOS10 0109 D63C ^35 MOS10 0093 D616 AD 23 03 LDA NEWPT+&03 MOS10 0109 D63C ^35 MOS10 0094 D619 ED 27 03 SBC GCSIY+&01 MOS10 0109 D63C ^35 MOS10 0095 D61C 8D 1C 03 STA TRINLN+&01 ;(MSB) MOS10 0109 D63C ^35 MOS10 0096 D61F 0D 1B 03 ORA TRINLN ;Anything to do? MOS10 0109 D63C ^35 MOS10 0097 D622 F0 17 BEQ TRSFA MOS10 0109 D63C ^35 MOS10 0098 D624 20 3E D6 TRSFB JSR HPLOT ;Plot the line MOS10 0109 D63C ^35 MOS10 0099 D627 A2 33 LDXIM SPARMS-V ;Move the side up MOS10 0109 D63C ^35 MOS10 0100 D629 20 0E D7 JSR ULN MOS10 0109 D63C ^35 MOS10 0101 D62C A2 28 LDXIM HPARMS-V ;Move the hypoteneuse up MOS10 0109 D63C ^35 MOS10 0102 D62E 20 0E D7 JSR ULN MOS10 0109 D63C ^35 MOS10 0103 D631 EE 1B 03 INC TRINLN ;Any more lines ? MOS10 0109 D63C ^35 MOS10 0104 D634 D0 EE BNE TRSFB ;Yes, then loop, otherwise MOS10 0109 D63C ^35 MOS10 0105 D636 EE 1C 03 INC TRINLN+&01 MOS10 0109 D63C ^35 MOS10 0106 D639 D0 E9 BNE TRSFB MOS10 0109 D63C ^35 MOS10 0107 D63B MOS10 0109 D63C ^35 MOS10 0108 D63B 28 TRSFA PLP ;Plot the last line? MOS10 0109 D63C ^35 MOS10 0109 D63C 90 B5 BCC TRSRTS ;No, if c=0 -- MOS10 0110 D63E -- MOS10 0111 D63E ;HPLOT Fast plot of horizontal line -- MOS10 0112 D63E ;Plots horizontal line in current colour from points defined -- MOS10 0113 D63E ;at SSTART & HSTART, or, if entered at HPLOTA, from -- MOS10 0114 D63E ;GWTROW+(X) to GWTROW+(Y). -- MOS10 0115 D63E ;Y co-ordinate taken from point at (X) -- MOS10 0116 D63E -- MOS10 0117 D63E A2 39 HPLOT LDXIM SSTART-V ;Initialise point pointers -- MOS10 0118 D640 A0 2E LDYIM HSTART-V -- MOS10 0119 D642 86 DE HPLOTA STX ZTEMPC ;Store these point pointers -- MOS10 0120 D644 BD 00 03 LDAAX V ;Is x co-ord. of (X)<(Y) ? -- MOS10 0121 D647 D9 00 03 CMPAY V -- MOS10 0122 D64A BD 01 03 LDAAX V+&01 -- MOS10 0123 D64D F9 01 03 SBCAY V+&01 -- MOS10 0124 D650 30 06 BMI HPLOTB ;No, then swap (X) < = > (Y) MOS10 0124 D650 v79 MOS10 0125 D652 98 TYA MOS10 0124 D650 v79 MOS10 0126 D653 A4 DE LDY ZTEMPC MOS10 0124 D650 v79 MOS10 0127 D655 AA TAX MOS10 0124 D650 v79 MOS10 0128 D656 86 DE STX ZTEMPC MOS10 0124 D650 v79 MOS10 0129 D658 84 DF HPLOTB STY ZTEMPC +&01 -- MOS10 0130 D65A -- MOS10 0131 D65A ;ZTEMPC & X now contain the offset from V to the L.H. point -- MOS10 0132 D65A ;& ZTEMPC +01 & Y the offset from V to the R.H. point -- MOS10 0133 D65A -- MOS10 0134 D65A B9 00 03 LDAAY V ;Push R.H. x co-ordinate MOS10 MOS10 MOS10 MOS10 Acorn macro assembler Page 38 MOS10 VDU File - MOS10 MOS10 -- MOS10 0135 D65D 48 PHA -- MOS10 0136 D65E B9 01 03 LDAAY V+&01 -- MOS10 0137 D661 48 PHA -- MOS10 0138 D662 A6 DF LDX ZTEMPC +&01 ;Window the R.H. point -- MOS10 0139 D664 20 21 D1 JSR WIND -- MOS10 0140 D667 F0 0D BEQ HPLOTC ;Within window?, then plot to this point MOS10 0140 D667 v72 MOS10 0141 D669 C9 02 CMPIM &02 ;Only other allowed value of this window is 2 MOS10 0140 D667 v72 MOS10 0142 D66B D0 3D BNE HPLOTX ;Exit if this isn't =2 MOS10 0142 D66B v42 MOS10 0143 D66D A2 04 LDXIM GWRCOL-V ;It was 2?, then copy R.H. margin to x co-ord of RH point MOS10 0142 D66B v42 MOS10 0144 D66F A4 DF LDY ZTEMPC+&01 MOS10 0142 D66B v42 MOS10 0145 D671 20 38 D4 JSR COPY2 MOS10 0142 D66B v42 MOS10 0146 D674 A6 DF LDX ZTEMPC+&01 MOS10 0142 D66B v42 MOS10 0147 D676 20 F4 D7 HPLOTC JSR GADDR ;Address (modified) RH end point MOS10 0142 D66B v42 MOS10 0148 D679 A6 DE LDX ZTEMPC ;Window L.H. end point MOS10 0142 D66B v42 MOS10 0149 D67B 20 21 D1 JSR WIND MOS10 0142 D66B v42 MOS10 0150 D67E 4A LSRA ;Only allowed values of this window are 0 & 1 MOS10 0142 D66B v42 MOS10 0151 D67F D0 29 BNE HPLOTX ;Neither of those?, then exit MOS10 0142 D66B v42 MOS10 0152 D681 90 02 BCC HPLOTD ;Window was zero, then don't modify L.H. end point MOS10 0142 D66B v42 MOS10 0153 D683 A2 00 LDXIM GWLCOL-V ;L.H. endpoint was to the left of L. margin, so plot to latter MOS10 0142 D66B v42 MOS10 0154 D685 A4 DF HPLOTD LDY ZTEMPC +&01 ;Point to R.H. end point MOS10 0142 D66B v42 MOS10 0155 D687 38 SEC ;to determine no. of points needed MOS10 0142 D66B v42 MOS10 0156 D688 B9 00 03 LDAAY V ;Generate no. of points to be plotted MOS10 0142 D66B v42 MOS10 0157 D68B FD 00 03 SBCAX V MOS10 0142 D66B v42 MOS10 0158 D68E 85 DC STA ZTEMPB MOS10 0142 D66B v42 MOS10 0159 D690 B9 01 03 LDAAY V+&01 MOS10 0142 D66B v42 MOS10 0160 D693 FD 01 03 SBCAX V+&01 MOS10 0142 D66B v42 MOS10 0161 D696 85 DD STA ZTEMPB +&01 MOS10 0142 D66B v42 MOS10 0162 D698 A9 00 LDAIM &00 ;Generate the mask for the R.H. fractional byte MOS10 0142 D66B v42 MOS10 0163 D69A 0A HPLOTG ASLA MOS10 0142 D66B v42 MOS10 0164 D69B 05 D1 ORA ZMASK ;Generate R.H fractional mask MOS10 0142 D66B v42 MOS10 0165 D69D A4 DC LDY ZTEMPB MOS10 0142 D66B v42 MOS10 0166 D69F D0 14 BNE HPLOTE MOS10 0142 D66B v42 MOS10 0167 D6A1 C6 DD DEC ZTEMPB +&01 ;No more points to be plotted ? MOS10 0142 D66B v42 MOS10 0168 D6A3 10 10 BPL HPLOTE MOS10 0142 D66B v42 MOS10 0169 D6A5 85 D1 STA ZMASK ;No?, then plot this byte only MOS10 0142 D66B v42 MOS10 0170 D6A7 20 02 D1 JSR PLOT MOS10 0142 D66B v42 MOS10 0171 D6AA A6 DF HPLOTX LDX ZTEMPC+&01 ;Restore R.H. end point's x co-ordinate MOS10 0219 D6F1 ^37 MOS10 0172 D6AC 68 PLA MOS10 0219 D6F1 ^37 MOS10 0173 D6AD 9D 01 03 STAAX V+&01 MOS10 0219 D6F1 ^37 MOS10 0174 D6B0 68 PLA MOS10 0219 D6F1 ^37 MOS10 0175 D6B1 9D 00 03 STAAX V MOS10 0219 D6F1 ^37 MOS10 0176 D6B4 60 RTS MOS10 0219 D6F1 ^37 MOS10 0177 D6B5 C6 DC HPLOTE DEC ZTEMPB MOS10 0219 D6F1 ^37 MOS10 0178 D6B7 AA TAX ;Continue with generation of R.H. fractional byte mask MOS10 0219 D6F1 ^37 MOS10 0179 D6B8 10 E0 BPL HPLOTG ;until b7 of this mask is set, whence is the mask complete MOS10 0219 D6F1 ^37 MOS10 0180 D6BA 85 D1 STA ZMASK MOS10 0219 D6F1 ^37 MOS10 0181 D6BC 20 02 D1 JSR PLOT ;Plot R.H. fractional byte MOS10 0219 D6F1 ^37 MOS10 0182 D6BF A6 DC LDX ZTEMPB ;LSB of no. points to be plotted, excl RH fractional byte MOS10 0219 D6F1 ^37 MOS10 0183 D6C1 E8 INX ;Increment this, for no. points is inclusive MOS10 0219 D6F1 ^37 MOS10 0184 D6C2 D0 02 BNE HPLOTL MOS10 0219 D6F1 ^37 MOS10 0185 D6C4 E6 DD INC ZTEMPB +&01 MOS10 0219 D6F1 ^37 MOS10 0186 D6C6 8A HPLOTL TXA MOS10 0219 D6F1 ^37 MOS10 0187 D6C7 48 PHA ;Needed for the determination of the LH fractional byte MOS10 0219 D6F1 ^37 MOS10 0188 D6C8 46 DD LSR ZTEMPB +&01 ;Divide no. points by no.pixels to give no. bytes MOS10 0219 D6F1 ^37 MOS10 0189 D6CA 6A RORA MOS10 0219 D6F1 ^37 MOS10 0190 D6CB AC 61 03 LDY NPIX MOS10 0219 D6F1 ^37 MOS10 0191 D6CE C0 03 CPYIM &03 MOS10 0219 D6F1 ^37 MOS10 0192 D6D0 F0 05 BEQ HPLOTP MOS10 0219 D6F1 ^37 MOS10 0193 D6D2 90 04 BCC HPLOTQ MOS10 0219 D6F1 ^37 MOS10 0194 D6D4 46 DD LSR ZTEMPB +&01 ;y>3, i.e 8 pixels per byte MOS10 0219 D6F1 ^37 MOS10 0195 D6D6 6A RORA MOS10 0219 D6F1 ^37 MOS10 0196 D6D7 [ MOS125 = &FF MOS10 0219 D6F1 ^37 MOS10 0198 D6D7 | MOS10 0219 D6F1 ^37 MOS10 0199 D6D7 HPLOTP ;y=3, i.e. 4 pixels per byte MOS10 0219 D6F1 ^37 MOS10 0200 D6D7 ;ZTEMPB +&01 dead; C dead as A must not exceed &4F MOS10 0219 D6F1 ^37 MOS10 0201 D6D7 ] MOS10 0219 D6F1 ^37 MOS10 0202 D6D7 4A LSRA MOS10 0219 D6F1 ^37 MOS10 0203 D6D8 AC 1A 03 HPLOTQ LDY YLINE ;Prepare ye the way of the loop MOS10 0219 D6F1 ^37 MOS10 0204 D6DB AA TAX ;Contains the nuber of complete bytes to be filled in MOS10 0219 D6F1 ^37 MOS10 0205 D6DC F0 0F BEQ HPLOTF ;None?, then skip to plotting of L.H. fractional byte MOS10 0219 D6F1 ^37 MOS10 0206 D6DE MOS10 0219 D6F1 ^37 MOS10 0207 D6DE 98 HPLOTI TYA ;MAIN FULL BYTE LOOP MOS10 0219 D6F1 ^37 MOS10 0208 D6DF 38 SEC ;Move Y back 8 bytes MOS10 0219 D6F1 ^37 MOS10 0209 D6E0 E9 08 SBCIM &08 MOS10 0219 D6F1 ^37 MOS10 0210 D6E2 A8 TAY MOS10 0219 D6F1 ^37 MOS10 0211 D6E3 B0 02 BCS HPLOTH ;Carry generated? MOS10 0219 D6F1 ^37 MOS10 0212 D6E5 C6 D7 DEC ZMEMG +&01 ;Yes?, then decrement MSB of IY vector MOS10 0219 D6F1 ^37 MOS10 0213 D6E7 20 16 D1 HPLOTH JSR PLOTFF ;Plot the bugger ! MOS10 0219 D6F1 ^37 MOS10 0214 D6EA CA DEX ;Any more ? MOS10 0219 D6F1 ^37 MOS10 0215 D6EB D0 F1 BNE HPLOTI ;Yes, then loop again MOS10 0219 D6F1 ^37 MOS10 0216 D6ED MOS10 0219 D6F1 ^37 MOS10 0217 D6ED 68 HPLOTF PLA ;Pull the LSB of the number of points to plotted MOS10 0219 D6F1 ^37 MOS10 0218 D6EE 2D 61 03 AND NPIX ;No. of points in L.H. fractional byte MOS10 0219 D6F1 ^37 MOS10 0219 D6F1 F0 B7 BEQ HPLOTX ;Leave if nothing to do -- MOS10 0220 D6F3 AA TAX ;Generate the mask for the LH fractional byte -- MOS10 0221 D6F4 A9 00 LDAIM &00 -- MOS10 0222 D6F6 0A HPLOTJ ASLA MOS10 0225 D6FB ^79 MOS10 0223 D6F7 0D 63 03 ORA MASKR MOS10 0225 D6FB ^79 MOS10 0224 D6FA CA DEX MOS10 0225 D6FB ^79 MOS10 0225 D6FB D0 F9 BNE HPLOTJ -- MOS10 0226 D6FD 85 D1 STA ZMASK -- MOS10 0227 D6FF 98 TYA -- MOS10 0228 D700 38 SEC ;Move Y back 8 bytes again -- MOS10 0229 D701 E9 08 SBCIM &08 -- MOS10 0230 D703 A8 TAY -- MOS10 0231 D704 B0 02 BCS HPLOTK ;Carry generated MOS10 0231 D704 v7D MOS10 0232 D706 C6 D7 DEC ZMEMG +&01 ;Yes?, then decrement MSB of IY vector MOS10 0231 D704 v7D MOS10 0233 D708 20 05 D1 HPLOTK JSR PLOTS ;Plot the L.H. fractional byte -- MOS10 0234 D70B 4C AA D6 JMP HPLOTX -- MOS10 0235 D70E -- MOS10 0236 D70E ;ULN Increments the current graphics line which is drawing the triangle -- MOS10 0237 D70E ;It varies the X points according to the values of the MOD deltas, and -- MOS10 0238 D70E ;the direction byte. -- MOS10 0239 D70E ;As input, it requires in X the offset of the parameter list from V. -- MOS10 0240 D70E ;The parameter list is assumed to be in the following order : -- MOS10 0241 D70E ;Bytes 0-1 "L", the variable used in determining the steps left/right -- MOS10 0242 D70E ;Bytes 2-3 MOD Delta X -- MOS10 0243 D70E ;Bytes 4-5 MOD Delta Y -- MOS10 0244 D70E ;Bytes 6-9 Point from which the line is to be drawn (XL,XH,YL,YH) -- MOS10 0245 D70E ;Byte A Direction - +ve if x increasing as Y does, else -ve -- MOS10 0246 D70E -- MOS10 0247 D70E FE 08 03 ULN INCAX V+&08 ;Increment Y value of point to be drawn from/to -- MOS10 0248 D711 D0 03 BNE ULNA MOS10 0248 D711 v7C MOS10 0249 D713 FE 09 03 INCAX V+&09 MOS10 0248 D711 v7C MOS10 0250 D716 38 ULNA SEC ;L := L - MOD(DeltaX) -- MOS10 0251 D717 BD 00 03 LDAAX V -- MOS10 0252 D71A FD 02 03 SBCAX V+&02 -- MOS10 0253 D71D 9D 00 03 STAAX V -- MOS10 0254 D720 BD 01 03 LDAAX V+&01 -- MOS10 0255 D723 FD 03 03 SBCAX V+&03 -- MOS10 0256 D726 9D 01 03 STAAX V+&01 MOS10 MOS10 MOS10 MOS10 Acorn macro assembler Page 39 MOS10 VDU File - MOS10 MOS10 -- MOS10 0257 D729 10 2F BPL ULNB ;+ve?, then skip the move X part following MOS10 0257 D729 v50 MOS10 0258 D72B [ MOS125 = &FF MOS10 0257 D729 v50 MOS10 0270 D72B | MOS10 0257 D729 v50 MOS10 0271 D72B 18 ULNF CLC MOS10 0257 D729 v50 MOS10 0272 D72C BD 0A 03 LDAAX V+&0A ;Move X, which direction ? MOS10 0257 D729 v50 MOS10 0273 D72F 30 0A BMI ULNC ;Skip if move left MOS10 0257 D729 v50 MOS10 0274 D731 FE 06 03 INCAX V+&06 ;Move right, therefore increment the X value MOS10 0257 D729 v50 MOS10 0275 D734 D0 10 BNE ULND MOS10 0257 D729 v50 MOS10 0276 D736 FE 07 03 INCAX V+&07 MOS10 0257 D729 v50 MOS10 0277 D739 90 0B BCC ULND ;always branch MOS10 0257 D729 v50 MOS10 0278 D73B BD 06 03 ULNC LDAAX V+&06 ;Move left, therefore decrement X value MOS10 0257 D729 v50 MOS10 0279 D73E D0 03 BNE ULNE MOS10 0257 D729 v50 MOS10 0280 D740 DE 07 03 DECAX V+&07 MOS10 0257 D729 v50 MOS10 0281 D743 DE 06 03 ULNE DECAX V+&06 MOS10 0257 D729 v50 MOS10 0282 D746 ULND ;L := L + MOD DeltaY MOS10 0257 D729 v50 MOS10 0283 D746 ] MOS10 0257 D729 v50 MOS10 0284 D746 BD 00 03 LDAAX V MOS10 0257 D729 v50 MOS10 0285 D749 7D 04 03 ADCAX V+&04 MOS10 0257 D729 v50 MOS10 0286 D74C 9D 00 03 STAAX V MOS10 0257 D729 v50 MOS10 0287 D74F BD 01 03 LDAAX V+&01 MOS10 0257 D729 v50 MOS10 0288 D752 7D 05 03 ADCAX V+&05 MOS10 0257 D729 v50 MOS10 0289 D755 9D 01 03 STAAX V+&01 MOS10 0257 D729 v50 MOS10 0290 D758 30 D1 BMI ULNF ;Move left/right again ? TRAP HORIZONTAL LINES BEFORE !! MOS10 0257 D729 v50 MOS10 0291 D75A 60 ULNB RTS -- MOS10 0292 D75B LNK MOS11 -- MOS11 0001 D75B -- MOS11 0002 D75B TTL VDU File - MOS11 -- MOS11 0003 D75B OPT MOS11 MOS11 MOS11 MOS11 MOS11 Acorn macro assembler Page 40 MOS11 VDU File - MOS11 MOS11 -- MOS11 0004 D75B -- MOS11 0005 D75B ;Last revision 05/05/82 -- MOS11 0006 D75B -- MOS11 0007 D75B ;05/05/82 Move GADDR here. Change to tabke with 1 entry only -- MOS11 0008 D75B ;01/05/82 Recoded to account for new ordering of variables -- MOS11 0009 D75B ;24/04/82 READCH returns mode in Y, char. in X (AGAIN!) -- MOS11 0010 D75B ;19/04/82 Improved exit at RPXLC -- MOS11 0011 D75B ;16/04/82 improved READCH code -- MOS11 0012 D75B ;25/03/82 Change order of READCH character search -- MOS11 0013 D75B ;22/01/82 Change EIG to EIGABS for READPX -- MOS11 0014 D75B ;07/01/82 Rewrite READCH for non-TTX (GPT) -- MOS11 0015 D75B ;16/11/81 Fix to READCH change (15/11) -- MOS11 0016 D75B ;15/11/81 READCH returns mode in Y, char. in X -- MOS11 0017 D75B ;09/11/81 (Paul) Read start of VDU space coping with model A -- MOS11 0018 D75B -- MOS11 0019 D75B ;READCH Reads the character at the current cursor location, -- MOS11 0020 D75B ;returning the result in A. -- MOS11 0021 D75B ;If the character is not found, 0 is returned. -- MOS11 0022 D75B ;Assumes new font splitting, using FNTFLG & PGSFNT -- MOS11 0023 D75B -- MOS11 0024 D75B READCH -- MOS11 0025 D75B AC 60 03 LDY NCOLOR ;Is it TTX? -- MOS11 0026 D75E D0 0F BNE READCE MOS11 0026 D75E v70 MOS11 0027 D760 B1 D8 LDAIY ZMEMT ;Yes, then read character direct (Y=0) MOS11 0026 D75E v70 MOS11 0028 D762 [ MOS125 = &FF MOS11 0026 D75E v70 MOS11 0038 D762 | MOS11 0026 D75E v70 MOS11 0039 D762 ;CS from OSB or RDCHK->RDCHGY->COPYCH MOS11 0026 D75E v70 MOS11 0040 D762 ;(or RDCHGS->GKEY..RDCHGY->COPYCH after hacking) MOS11 0026 D75E v70 MOS11 0041 D762 18 CLC ;transform only MOS11 0026 D75E v70 MOS11 0042 D763 20 F0 CF JSR TTXFRM ;convert ASCII to Teletext MOS11 0026 D75E v70 MOS11 0043 D766 20 F0 CF JSR TTXFRM ;and again to convert Teletext to ASCII MOS11 0026 D75E v70 MOS11 0044 D769 AA TAX MOS11 0026 D75E v70 MOS11 0045 D76A AC 55 03 READKE LDY MODE ;Only way of getting the mode MOS11 0082 D797 ^51 MOS11 0046 D76D 8A TXA MOS11 0082 D797 ^51 MOS11 0047 D76E ] MOS11 0082 D797 ^51 MOS11 0048 D76E 60 RTS MOS11 0082 D797 ^51 MOS11 0049 D76F MOS11 0082 D797 ^51 MOS11 0050 D76F MOS11 0082 D797 ^51 MOS11 0051 D76F 20 99 D7 READCE JSR PTCNV ;Get the bit pattern to READWS MOS11 0082 D797 ^51 MOS11 0052 D772 [ MOS125 = &FF MOS11 0082 D797 ^51 MOS11 0055 D772 | MOS11 0082 D797 ^51 MOS11 0056 D772 A9 20 LDAIM &20 ;First character to be checked MOS11 0082 D797 ^51 MOS11 0057 D774 READKF ;Address charcter MOS11 0082 D797 ^51 MOS11 0058 D774 ] MOS11 0082 D797 ^51 MOS11 0059 D774 48 PHA MOS11 0082 D797 ^51 MOS11 0060 D775 20 50 D0 JSR CHADDR ;Result to ZTEMPC MOS11 0082 D797 ^51 MOS11 0061 D778 68 PLA MOS11 0082 D797 ^51 MOS11 0062 D779 AA TAX MOS11 0082 D797 ^51 MOS11 0063 D77A A0 07 READKA LDYIM &07 ;Compare this character MOS11 0082 D797 ^51 MOS11 0064 D77C B9 28 03 READKB LDAAY READWS ;Get bit pattern MOS11 0082 D797 ^51 MOS11 0065 D77F D1 DE CMPIY ZTEMPC ;Compare with font MOS11 0082 D797 ^51 MOS11 0066 D781 D0 07 BNE READKC ;Different?, then not this character MOS11 0082 D797 ^51 MOS11 0067 D783 88 DEY ;Same?, then look at next row down MOS11 0082 D797 ^51 MOS11 0068 D784 10 F6 BPL READKB MOS11 0082 D797 ^51 MOS11 0069 D786 [ MOS125 = &FF MOS11 0082 D797 ^51 MOS11 0071 D786 ] MOS11 0082 D797 ^51 MOS11 0072 D786 E0 7F CPXIM &7F ;Is it a DEL? MOS11 0082 D797 ^51 MOS11 0073 D788 D0 E0 BNE READKE ;No?, then you have found it MOS11 0082 D797 ^51 MOS11 0074 D78A E8 READKC INX ;Next character up MOS11 0082 D797 ^51 MOS11 0075 D78B A5 DE LDA ZTEMPC ;LSB of font pointer up by 8 MOS11 0082 D797 ^51 MOS11 0076 D78D 18 CLC MOS11 0082 D797 ^51 MOS11 0077 D78E 69 08 ADCIM &08 MOS11 0082 D797 ^51 MOS11 0078 D790 85 DE STA ZTEMPC MOS11 0082 D797 ^51 MOS11 0079 D792 D0 E6 BNE READKA ;More on this page? MOS11 0082 D797 ^51 MOS11 0080 D794 8A TXA ;Finished search? MOS11 0082 D797 ^51 MOS11 0081 D795 D0 DD BNE READKF ;No?, then try next page MOS11 0082 D797 ^51 MOS11 0082 D797 F0 D1 BEQ READKE ;(branch always taken) -- MOS11 0083 D799 -- MOS11 0084 D799 ;Converts the 8,16 or 32 byte character on the screen to an 8 byte -- MOS11 0085 D799 ;bit pattern in Q .. Q+07. Not very fast, in particular, the 8 byte -- MOS11 0086 D799 ;version could be speeded up. Background text colour is recognized -- MOS11 0087 D799 ;as 'background', even if cursors are joined. Anything else is -- MOS11 0088 D799 ;recognised as 'foreground' -- MOS11 0089 D799 -- MOS11 0090 D799 ;ZTEMP is the row number (7..0) -- MOS11 0091 D799 ;ZTEMP +01 is he bit pattern being formed from this row -- MOS11 0092 D799 ;ZTEMPB is the mask being used to isolate the current pixel -- MOS11 0093 D799 -- MOS11 0094 D799 A0 07 PTCNV LDYIM &07 ;The row to be converted -- MOS11 0095 D79B [ MOS125 = &FF -- MOS11 0111 D79B | -- MOS11 0112 D79B ;Adds 4 bytes but OS 1.25 gets them anyway -- MOS11 0113 D79B ;to remain parallel with 1.26 until GADDR -- MOS11 0114 D79B PTCNVA ;Start of 'convert 1 row' loop -- MOS11 0115 D79B A9 01 LDAIM &01 ;The bit pattern to be formed MOS11 0148 D7CA ^4F MOS11 0116 D79D 85 DB STA ZTEMP +&01 ;Finshed when a carry shifted out MOS11 0148 D7CA ^4F MOS11 0117 D79F CD 63 03 CMP MASKR ;C=0 if >1bpp MOS11 0148 D7CA ^4F MOS11 0118 D7A2 PTCNVB MOS11 0148 D7CA ^4F MOS11 0119 D7A2 B1 D8 LDAIY ZMEMT ;Get the byte to be tested MOS11 0148 D7CA ^4F MOS11 0120 D7A4 4D 58 03 EOR BTCOLF ;Isolate back from foreground MOS11 0148 D7CA ^4F MOS11 0121 D7A7 B0 1D BCS PTCNVF ;Write byte directly if 1bpp MOS11 0148 D7CA ^4F MOS11 0122 D7A9 85 DC STA ZTEMPB MOS11 0148 D7CA ^4F MOS11 0123 D7AB AD 62 03 LDA MASKL ;Isolates the pixel to be tested in the current byte MOS11 0148 D7CA ^4F MOS11 0124 D7AE 24 DC PTCNVC BIT ZTEMPB ;Are any of the bits in this pixel set ? MOS11 0148 D7CA ^4F MOS11 0125 D7B0 F0 01 BEQ PTCNVD ;No?, then this pixel was background MOS11 0148 D7CA ^4F MOS11 0126 D7B2 38 SEC ;Yes?, then it was foreground MOS11 0148 D7CA ^4F MOS11 0127 D7B3 26 DB PTCNVD ROL ZTEMP +&01 ;Shift this bit into the bit pattern MOS11 0148 D7CA ^4F MOS11 0128 D7B5 6A RORA ;Isolate the next pixel MOS11 0148 D7CA ^4F MOS11 0129 D7B6 90 F6 BCC PTCNVC ;carry clear, then continue MOS11 0148 D7CA ^4F MOS11 0130 D7B8 30 06 BMI PTCNVE ;pattern overflow?, then this pattern is complete MOS11 0148 D7CA ^4F MOS11 0131 D7BA ] MOS11 0148 D7CA ^4F MOS11 0132 D7BA 98 TYA ;c=1, then examine the next byte in the row MOS11 0148 D7CA ^4F MOS11 0133 D7BB 69 07 ADCIM &07 ;(c=1), by adding 8 to Y MOS11 0148 D7CA ^4F MOS11 0134 D7BD A8 TAY MOS11 0148 D7CA ^4F MOS11 0135 D7BE 90 E2 BCC PTCNVB ;and continue (branch always taken) MOS11 0148 D7CA ^4F MOS11 0136 D7C0 [ MOS125 = &FF MOS11 0148 D7CA ^4F MOS11 0139 D7C0 | MOS11 0148 D7CA ^4F MOS11 0140 D7C0 98 PTCNVE TYA ;Restore Y MOS11 0148 D7CA ^4F MOS11 0141 D7C1 29 07 ANDIM &07 MOS11 0148 D7CA ^4F MOS11 0142 D7C3 A8 TAY MOS11 0148 D7CA ^4F MOS11 0143 D7C4 A5 DB LDA ZTEMP +&01 ;bit pattern finished, store it in the READWS MOS11 0148 D7CA ^4F MOS11 0144 D7C6 PTCNVF MOS11 0148 D7CA ^4F MOS11 0145 D7C6 ] MOS11 0148 D7CA ^4F MOS11 0146 D7C6 99 28 03 STAAY READWS MOS11 0148 D7CA ^4F MOS11 0147 D7C9 88 DEY ;& do the next row up MOS11 0148 D7CA ^4F MOS11 0148 D7CA 10 CF BPL PTCNVA -- MOS11 0149 D7CC [ MOS125 = &FF -- MOS11 0150 D7CC | -- MOS11 0151 D7CC A9 FF RPXLC LDAIM &FF ;Return $FF if point was outside graphics window MOS11 0166 D7D9 ^71 MOS11 0152 D7CE ] MOS11 0166 D7D9 ^71 MOS11 0153 D7CE 60 RTS ;or return MOS11 MOS11 MOS11 MOS11 Acorn macro assembler Page 41 MOS11 VDU File - MOS11 MOS11 MOS11 0166 D7D9 ^71 MOS11 0154 D7CF MOS11 0166 D7D9 ^71 MOS11 0155 D7CF ;RPXL Reads the pixel at V+(A), MOS11 0166 D7D9 ^71 MOS11 0156 D7CF ;returning $FF if the cursor is out of the window, else the logical MOS11 0166 D7D9 ^71 MOS11 0157 D7CF ;colour at the cursor. MOS11 0166 D7D9 ^71 MOS11 0158 D7CF ;Assumes the current cursor in internal representation is GCSIY... MOS11 0166 D7D9 ^71 MOS11 0159 D7CF MOS11 0166 D7D9 ^71 MOS11 0160 D7CF 48 RPXLD PHA MOS11 0166 D7D9 ^71 MOS11 0161 D7D0 AA TAX ;Convert to Ico-ords MOS11 0166 D7D9 ^71 MOS11 0162 D7D1 20 5B D1 JSR EIGABS MOS11 0166 D7D9 ^71 MOS11 0163 D7D4 68 PLA MOS11 0166 D7D9 ^71 MOS11 0164 D7D5 AA TAX MOS11 0166 D7D9 ^71 MOS11 0165 D7D6 20 EF D7 JSR GADDV MOS11 0166 D7D9 ^71 MOS11 0166 D7D9 D0 F1 BNE RPXLC ;Out of window?, then return $FF. -- MOS11 0167 D7DB B1 D6 LDAIY ZMEMG -- MOS11 0168 D7DD [ MOS125 = &FF -- MOS11 0181 D7DD | -- MOS11 0182 D7DD 85 DA STA ZTEMP -- MOS11 0183 D7DF B0 01 RPXLA BCS RPXLB ;kick the bit out again if it wasn't relevant MOS11 0188 D7E7 ^76 MOS11 0184 D7E1 4A LSRA MOS11 0188 D7E7 ^76 MOS11 0185 D7E2 06 DA RPXLB ASL ZTEMP ;Shift out the leftmost bit MOS11 0188 D7E7 ^76 MOS11 0186 D7E4 2A ROLA ;& shift into the byte to receive the pixel's logical colour MOS11 0188 D7E7 ^76 MOS11 0187 D7E5 06 D1 ASL ZMASK ;unless the bit was irrelevant MOS11 0188 D7E7 ^76 MOS11 0188 D7E7 D0 F6 BNE RPXLA ;Have we finished ? -- MOS11 0189 D7E9 2D 60 03 AND NCOLOR -- MOS11 0190 D7EC ] -- MOS11 0191 D7EC 60 RPXLX RTS ;& finish MOS11 0197 D7F2 ^78 MOS11 0192 D7ED MOS11 0197 D7F2 ^78 MOS11 0193 D7ED ;Window a point, & plot if in window MOS11 0197 D7F2 ^78 MOS11 0194 D7ED MOS11 0197 D7F2 ^78 MOS11 0195 D7ED A2 20 GADDW LDXIM NEWPT-V ;Do this for new point MOS11 0197 D7F2 ^78 MOS11 0196 D7EF 20 21 D1 GADDV JSR WIND ;Do this for general point. Is it in window ? MOS11 0197 D7F2 ^78 MOS11 0197 D7F2 D0 F8 BNE RPXLX ;No, then skip the windowing -- MOS11 0198 D7F4 -- MOS11 0199 D7F4 ;otherwise fall through to ... -- MOS11 0200 D7F4 -- MOS11 0201 D7F4 ;GADDR Addresses a single pixel on the graphics screen -- MOS11 0202 D7F4 ;Results are not guaranteed unless point is on screen -- MOS11 0203 D7F4 ;Requires :- -- MOS11 0204 D7F4 ;(X) = offset from V of point to be addressed. -- MOS11 0205 D7F4 ;Format of the pointed at point is INTERNAL co-ords, non-inverted Y axis -- MOS11 0206 D7F4 ;with 4 bytes of XL,XH,YL,YH. -- MOS11 0207 D7F4 ;ZTBL points to row offset table as per character writing -- MOS11 0208 D7F4 ;TOPSCN as usual. -- MOS11 0209 D7F4 ;NPIX = No. pixles per byte -- MOS11 0210 D7F4 ;Wraparound may occur on ends of lines only, thus hardware must display -- MOS11 0211 D7F4 ;ALL the characters in the display area (OK for modes as proposed). -- MOS11 0212 D7F4 ;Sets the following variables -- MOS11 0213 D7F4 ;YLINE = line offset within character cell (0..7) -- MOS11 0214 D7F4 ;ZMEMG = 1st byte of character cell -- MOS11 0215 D7F4 ;ZMASK = mask -- MOS11 0216 D7F4 -- MOS11 0217 D7F4 BD 02 03 GADDR LDAAX V+&02 ;(Y,LSB) MSB assumed 0 -- MOS11 0218 D7F7 49 FF EORIM &FF ;Invert Y axis -- MOS11 0219 D7F9 A8 TAY -- MOS11 0220 D7FA 29 07 ANDIM &07 ;Get YLINE = 3 least significant bits of Y -- MOS11 0221 D7FC 8D 1A 03 STA YLINE -- MOS11 0222 D7FF 98 TYA -- MOS11 0223 D800 4A LSRA ;Get twice the character row (for 2 byte entry lookup table) -- MOS11 0224 D801 4A LSRA -- MOS11 0225 D802 4A LSRA -- MOS11 0226 D803 0A ASLA ;c=0 guaranteed (better than AND $FE : CLC) -- MOS11 0227 D804 A8 TAY ;Character row offset -- MOS11 0228 D805 B1 E0 LDAIY ZTBL ;Add row offset to TOPSCN -- MOS11 0229 D807 85 DA STA ZTEMP ;MSB -- MOS11 0230 D809 C8 INY -- MOS11 0231 D80A B1 E0 LDAIY ZTBL ;LSB -- MOS11 0232 D80C AC 56 03 LDY MEMODE -- MOS11 0233 D80F F0 03 BEQ GADDRD ; Divide by 2 if 10K mode (can only be 0 or 2) MOS11 0233 D80F v7C MOS11 0234 D811 46 DA LSR ZTEMP MOS11 0233 D80F v7C MOS11 0235 D813 6A RORA MOS11 0233 D80F v7C MOS11 0236 D814 6D 50 03 GADDRD ADC TOPSCN ;c=0 guaranteed before this add -- MOS11 0237 D817 85 D6 STA ZMEMG -- MOS11 0238 D819 A5 DA LDA ZTEMP -- MOS11 0239 D81B 6D 51 03 ADC TOPSCN+&01 -- MOS11 0240 D81E 85 D7 STA ZMEMG +&01 -- MOS11 0241 D820 -- MOS11 0242 D820 ;Now calculate the X offset -- MOS11 0243 D820 -- MOS11 0244 D820 BD 01 03 LDAAX V+&01 ;(MSB,X) -- MOS11 0245 D823 85 DA STA ZTEMP -- MOS11 0246 D825 BD 00 03 LDAAX V ;(LSB,X) -- MOS11 0247 D828 48 PHA ;Push the LSB of the X co-ordinate -- MOS11 0248 D829 2D 61 03 AND NPIX ;Calc. ZMASK (NB, c=0 from prev. addition) -- MOS11 0249 D82C 6D 61 03 ADC NPIX ;This gives the correct starting position -- MOS11 0250 D82F A8 TAY ;within the table, plus 1 -- MOS11 0251 D830 B9 06 C4 LDAAY MASKTB-&01 ;So compensate by subtracting one here -- MOS11 0252 D833 85 D1 STA ZMASK -- MOS11 0253 D835 68 PLA ;Retrieve the LSB of X co-ordinate -- MOS11 0254 D836 AC 61 03 LDY NPIX -- MOS11 0255 D839 C0 03 CPYIM &03 ;Divide by NPIX, and mult. by 8 -- MOS11 0256 D83B F0 05 BEQ GADDRA ;4 pixles/byte - mult. by 2 MOS11 0256 D83B v7A MOS11 0257 D83D B0 06 BCS GADDRB ;8 pixles/byte - don't do anything MOS11 0257 D83D v79 MOS11 0258 D83F 0A ASLA ;2 pixles per byte - mult. by 4 MOS11 0257 D83D v79 MOS11 0259 D840 26 DA ROL ZTEMP MOS11 0257 D83D v79 MOS11 0260 D842 0A GADDRA ASLA MOS11 0257 D83D v79 MOS11 0261 D843 26 DA ROL ZTEMP MOS11 0257 D83D v79 MOS11 0262 D845 29 F8 GADDRB ANDIM &F8 ;Ignore any low order bits -- MOS11 0263 D847 18 CLC ;Calculate the final address, LSB 1st -- MOS11 0264 D848 65 D6 ADC ZMEMG -- MOS11 0265 D84A 85 D6 STA ZMEMG -- MOS11 0266 D84C A5 DA LDA ZTEMP -- MOS11 0267 D84E 65 D7 ADC ZMEMG +&01 -- MOS11 0268 D850 10 04 BPL GADDRC ;Skip wraparound if < $8000 MOS11 0268 D850 v7B MOS11 0269 D852 38 SEC ;Correct by subtracting off screen if it is MOS11 0268 D850 v7B MOS11 0270 D853 ED 54 03 SBC BYTSCN MOS11 0268 D850 v7B MOS11 0271 D856 85 D7 GADDRC STA ZMEMG +&01 ;Store final address, MSB -- MOS11 0272 D858 AC 1A 03 LDY YLINE -- MOS11 0273 D85B A9 00 COPYZX LDAIM &00 ;Sets z=1 MOS11 0310 D89B ^3E MOS11 0274 D85D 60 RTS MOS11 0310 D89B ^3E MOS11 0275 D85E MOS11 0310 D89B ^3E MOS11 0276 D85E ;VDUB for cursor control keys MOS11 0310 D89B ^3E MOS11 0277 D85E MOS11 0310 D89B ^3E MOS11 0278 D85E VDUB MOS11 0310 D89B ^3E MOS11 0279 D85E 48 PHA MOS11 0310 D89B ^3E MOS11 0280 D85F A9 A0 LDAIM &A0 ;To see if the cursors are joined or drivers disabled when BIT is done MOS11 0310 D89B ^3E MOS11 0281 D861 AE 6A 02 LDX QPOSN ;Qing bytes ? MOS11 0310 D89B ^3E MOS11 0282 D864 D0 40 BNE VDUBEX ;Yes?, then ignore this MOS11 0310 D89B ^3E MOS11 0283 D866 24 D0 BIT STATS ;Are the drivers enabled ? MOS11 0310 D89B ^3E MOS11 0284 D868 D0 3C BNE VDUBEX ;Leave if not, or cursors joined MOS11 0310 D89B ^3E MOS11 0285 D86A 70 19 BVS VDUBA ;Are we in cursor edit mode ? Yes?, then skip MOS11 0310 D89B ^3E MOS11 0286 D86C AD 5F 03 LDA CSTEMP ;Flash the cursor at twice the rate MOS11 MOS11 MOS11 MOS11 Acorn macro assembler Page 42 MOS11 VDU File - MOS11 MOS11 MOS11 0310 D89B ^3E MOS11 0287 D86F 29 9F ANDIM &9F ;Sets b5=0, b6=1 of r10 of 6845, giving fast flashing cursor MOS11 0310 D89B ^3E MOS11 0288 D871 09 40 ORAIM &40 MOS11 0310 D89B ^3E MOS11 0289 D873 20 2A C9 JSR ETCB ;Store in r10 of 6845, don't save to CSTEMP MOS11 0310 D89B ^3E MOS11 0290 D876 A2 18 LDXIM CSX-V ;Set b1 of STATS or store CSX to PCSX MOS11 0310 D89B ^3E MOS11 0291 D878 A0 64 LDYIM PCSX-V MOS11 0310 D89B ^3E MOS11 0292 D87A 20 38 D4 JSR COPY2 MOS11 0310 D89B ^3E MOS11 0293 D87D 20 70 CD JSR OCSRWR ;Print the output cursor MOS11 0310 D89B ^3E MOS11 0294 D880 A9 02 LDAIM &02 ;Set b1 of STATS MOS11 0310 D89B ^3E MOS11 0295 D882 20 9C C5 JSR STTOR MOS11 0310 D89B ^3E MOS11 0296 D885 A9 BF VDUBA LDAIM &BF ;Clear b6 of STATS MOS11 0310 D89B ^3E MOS11 0297 D887 20 A7 C5 JSR STTAND MOS11 0310 D89B ^3E MOS11 0298 D88A 68 PLA ;Restore input character to routine MOS11 0310 D89B ^3E MOS11 0299 D88B 29 7F ANDIM &7F ;Kill the parity bit MOS11 0310 D89B ^3E MOS11 0300 D88D 20 C0 C4 JSR VDU ;Execute cursor movement on input cursor MOS11 0310 D89B ^3E MOS11 0301 D890 A9 40 LDAIM &40 ;Set b6 of STATS MOS11 0310 D89B ^3E MOS11 0302 D892 4C 9C C5 JMP STTOR MOS11 0310 D89B ^3E MOS11 0303 D895 MOS11 0310 D89B ^3E MOS11 0304 D895 ;Copy key in cursor editing MOS11 0310 D89B ^3E MOS11 0305 D895 MOS11 0310 D89B ^3E MOS11 0306 D895 COPYCH MOS11 0310 D89B ^3E MOS11 0307 D895 A9 20 LDAIM &20 ;Cursors joined ? MOS11 0310 D89B ^3E MOS11 0308 D897 24 D0 BIT STATS MOS11 0310 D89B ^3E MOS11 0309 D899 50 C0 BVC COPYZX ;Not C.E. mode, then do nothing MOS11 0310 D89B ^3E MOS11 0310 D89B D0 BE BNE COPYZX ;Cursors joined, so do nothing MOS11 0282 D864 v3F MOS11 0311 D89D 20 5B D7 JSR READCH ;Read character at cursor position MOS11 0282 D864 v3F MOS11 0312 D8A0 F0 05 BEQ COPYCX ;Not recognised?, then exit with no further action MOS11 0282 D864 v3F MOS11 0313 D8A2 48 PHA ;Move input cursor right MOS11 0282 D864 v3F MOS11 0314 D8A3 20 63 C6 JSR HT ;But with no scrolling MOS11 0282 D864 v3F MOS11 0315 D8A6 68 VDUBEX PLA MOS11 0312 D8A0 v7A MOS11 0316 D8A7 60 COPYCX RTS -- MOS11 0317 D8A8 -- MOS11 0318 D8A8 ;CSEDEX Finish cursor edit mode -- MOS11 0319 D8A8 -- MOS11 0320 D8A8 A9 BD CSEDEX LDAIM &BD ;Clear b1 & b6 from STATS -- MOS11 0321 D8AA 20 A7 C5 JSR STTAND -- MOS11 0322 D8AD 20 27 C9 JSR ETCA ;Restore cursor from CSTEMP to r10 of 6845 -- MOS11 0323 D8B0 A9 0D LDAIM TRMCH ;Restore (A) -- MOS11 0324 D8B2 60 RTS -- MOS11 0325 D8B3 -- MOS11 0326 D8B3 TOPCMD -- MOS11 0327 D8B3 AE 55 03 LDX MODE ;~~~ Beginning of screen memory ~~~ -- MOS11 0328 D8B6 -- MOS11 0329 D8B6 ;& fall through to .... -- MOS11 0330 D8B6 -- MOS11 0331 D8B6 TOPMDX -- MOS11 0332 D8B6 8A TXA ;Don't trust (X) anymore .... -- MOS11 0333 D8B7 29 07 ANDIM &07 -- MOS11 0334 D8B9 A8 TAY -- MOS11 0335 D8BA ; read VDU low water mark for mode Y -- MOS11 0336 D8BA BE 40 C4 LDXAY MODETB ;~~~ Read beginning of memory for mode (Y) ~~~ -- MOS11 0337 D8BD BD 5E C4 LDAAX STSCTB ;A := hi-byte of lwm address -- MOS11 0338 D8C0 A2 00 LDXIM &00 ;Used later -- MOS11 0339 D8C2 ; check model type -- MOS11 0340 D8C2 2C 8E 02 BIT MODEL -- MOS11 0341 D8C5 30 07 BMI PRBB1 ;[model B, all modes permissable] MOS11 0341 D8C5 v78 MOS11 0342 D8C7 ; model A MOS11 0341 D8C5 v78 MOS11 0343 D8C7 ; return HWM of zero for modes 0 to 3 MOS11 0341 D8C5 v78 MOS11 0344 D8C7 ; (cos they require between 16K and 20K) MOS11 0341 D8C5 v78 MOS11 0345 D8C7 29 3F ANDIM &3F ;correct for 16K m/c (model A) MOS11 0341 D8C5 v78 MOS11 0346 D8C9 C0 04 CPYIM &04 ;fault modes<=3 on model A MOS11 0341 D8C5 v78 MOS11 0347 D8CB B0 01 BCS PRBB1 ;[mode>=4] MOS11 0341 D8C5 v78 MOS11 0348 D8CD 8A TXA ;model A and mode<=3. Sets (A):=0 MOS11 0341 D8C5 v78 MOS11 0349 D8CE PRBB1 ;return low water mark MOS11 0341 D8C5 v78 MOS11 0350 D8CE A8 TAY -- MOS11 0351 D8CF 60 RTS -- MOS11 0352 D8D0 -- MOS11 0353 D8D0 [ MOS125 = &FF -- MOS11 0354 D8D0 | -- MOS11 0355 D8D0 ;place new table after GADDR but within VDU code area -- MOS11 0356 D8D0 DCCTAB -- MOS11 0357 D8D0 50 00 = &50,&00 ;4 colour modes toggle b4,b6, zero terminates -- MOS11 0358 D8D2 30 70 30 = &30,&70,&30 ;16 colour modes toggle b4,b5,b6, next byte terminates -- MOS11 0359 D8D5 00 60 00 = &00,&60,&00,&60 ;4 colour modes move Logi b6 to b5 -- MOS11 0360 D8D9 ] -- MOS11 0361 D8D9 -- MOS11 0362 D8D9 ENDVDU ;end of VDU code -- MOS11 0363 D8D9 ; Now test code layout for correctness -- MOS11 0364 D8D9 -- MOS11 0365 D8D9 0000 T1 * SOH:SHR:&8-CODORG:SHR:&3 -- MOS11 0366 D8D9 0000 T2 * DCA:SHR:&8-CODORG:SHR:&3 -- MOS11 0367 D8D9 0000 T3 * DCB:SHR:&8-CODORG:SHR:&3 -- MOS11 0368 D8D9 0000 T4 * DCC:SHR:&8-CODORG:SHR:&3 -- MOS11 0369 D8D9 0000 T5 * SYN:SHR:&8-CODORG:SHR:&3 -- MOS11 0370 D8D9 0000 T6 * ETB:SHR:&8-CODORG:SHR:&3 -- MOS11 0371 D8D9 0000 T7 * CAN:SHR:&8-CODORG:SHR:&3 -- MOS11 0372 D8D9 0000 T8 * EM:SHR:&8-CODORG:SHR:&3 -- MOS11 0373 D8D9 0000 T9 * FS:SHR:&8-CODORG:SHR:&3 -- MOS11 0374 D8D9 0000 TA * GS:SHR:&8-CODORG:SHR:&3 -- MOS11 0375 D8D9 0000 TB * US:SHR:&8-CODORG:SHR:&3 -- MOS11 0376 D8D9 [ T1=0 -- MOS11 0377 D8D9 | -- MOS11 0379 D8D9 ] -- MOS11 0380 D8D9 [ T2=0 -- MOS11 0381 D8D9 | -- MOS11 0383 D8D9 ] -- MOS11 0384 D8D9 [ T3=0 -- MOS11 0385 D8D9 | -- MOS11 0387 D8D9 ] -- MOS11 0388 D8D9 [ T4=0 -- MOS11 0389 D8D9 | -- MOS11 0391 D8D9 ] -- MOS11 0392 D8D9 [ T5=0 -- MOS11 0393 D8D9 | -- MOS11 0395 D8D9 ] -- MOS11 0396 D8D9 [ T6=0 -- MOS11 0397 D8D9 | -- MOS11 0399 D8D9 ] -- MOS11 0400 D8D9 [ T7=0 -- MOS11 0401 D8D9 | -- MOS11 0403 D8D9 ] -- MOS11 0404 D8D9 [ T8=0 -- MOS11 0405 D8D9 | -- MOS11 0407 D8D9 ] -- MOS11 0408 D8D9 [ T9=0 -- MOS11 0409 D8D9 | -- MOS11 0411 D8D9 ] -- MOS11 0412 D8D9 [ TA=0 -- MOS11 0413 D8D9 | -- MOS11 0415 D8D9 ] -- MOS11 0416 D8D9 [ TB=0 -- MOS11 0417 D8D9 | MOS11 MOS11 MOS11 MOS11 Acorn macro assembler Page 43 MOS11 VDU File - MOS11 MOS11 -- MOS11 0419 D8D9 ] -- MOS11 0420 D8D9 -- MOS11 0421 D8D9 00C3 TC * HRGTB:SHR: 8 -- MOS11 0422 D8D9 00C3 TD * TXTTB:SHR: 8 -- MOS11 0423 D8D9 [ TC-TD=0 -- MOS11 0424 D8D9 | -- MOS11 0426 D8D9 ] -- MOS11 0427 D8D9 -- MOS11 0428 D8D9 00CC TE * CLASCA:SHR: 8 -- MOS11 0429 D8D9 00CC TF * CLASCE:SHR: 8 -- MOS11 0430 D8D9 -- MOS11 0431 D8D9 [ TE-TF=0 -- MOS11 0432 D8D9 | -- MOS11 0434 D8D9 ] -- MOS11 0435 D8D9 -- MOS11 0436 D8D9 OPT OPPON -- MOS11 0437 D8D9 < 3 -- MOS11 0438 D8D9 -- MOS11 0439 D8D9 LNK MOS30 -- MOS30 0001 D8D9 ; MOS30 -- MOS30 0002 D8D9 OPT &01 -- MOS30 0003 D8D9 TTL MOS30 Manifests -- MOS30 0004 D8D9 -- MOS30 0005 D8D9 ;Change record: -- MOS30 0006 D8D9 -- MOS30 0007 D8D9 -- MOS30 0008 D8D9 < &0003 -- MOS30 0009 D8D9 > &0002 -- MOS30 0010 D8D9 -- MOS30 0011 D8D9 -- MOS30 0012 D8D9 -- MOS30 0013 D8D9 -- MOS30 0014 D8D9 ; module print selections -- MOS30 0015 D8D9 ; -- MOS30 0016 D8D9 0005 MOS30 * DEFOPT -- MOS30 0017 D8D9 0005 MOS32 * DEFOPT -- MOS30 0018 D8D9 0005 MOS34 * DEFOPT -- MOS30 0019 D8D9 0005 MOS36 * DEFOPT -- MOS30 0020 D8D9 0005 MOS38 * DEFOPT -- MOS30 0021 D8D9 0005 MOS39 * DEFOPT -- MOS30 0022 D8D9 0005 MOS40 * DEFOPT -- MOS30 0023 D8D9 0005 MOS42 * DEFOPT -- MOS30 0024 D8D9 0005 MOS44 * DEFOPT -- MOS30 0025 D8D9 0005 MOS46 * DEFOPT -- MOS30 0026 D8D9 0005 MOS48 * DEFOPT -- MOS30 0027 D8D9 -- MOS30 0028 D8D9 0005 MOS52 * DEFOPT -- MOS30 0029 D8D9 0005 MOS54 * DEFOPT -- MOS30 0030 D8D9 0005 MOS56 * DEFOPT -- MOS30 0031 D8D9 -- MOS30 0032 D8D9 0005 MOS99 * DEFOPT -- MOS30 0033 D8D9 -- MOS30 0034 D8D9 -- MOS30 0035 D8D9 OPT MOS30 MOS30 MOS30 MOS30 MOS30 Acorn macro assembler Page 44 MOS30 MOS30 Manifests MOS30 -- MOS30 0036 D8D9 ;(c) 1981 ACORN Computers Limited -- MOS30 0037 D8D9 ;BBC Microcomputer Machine Operating System (MOS) -- MOS30 0038 D8D9 ;Change record: -- MOS30 0039 D8D9 ;Author(s): -- MOS30 0040 D8D9 ;PB Paul Bond -- MOS30 0041 D8D9 ;MP Mike Prees -- MOS30 0042 D8D9 -- MOS30 0043 D8D9 -- MOS30 0044 D8D9 ; version number -- MOS30 0045 D8D9 ; -- MOS30 0046 D8D9 0001 MCVER * &01 ;OS binary version number -- MOS30 0047 D8D9 0031 VERA * "1" -- MOS30 0048 D8D9 0032 VERB * "2" -- MOS30 0049 D8D9 [ MOS125 = &FF -- MOS30 0051 D8D9 ] -- MOS30 0052 D8D9 [ MOS125 = &7F -- MOS30 0053 D8D9 0036 VERC * "6" -- MOS30 0054 D8D9 ] -- MOS30 0055 D8D9 [ MOS125 = &00 -- MOS30 0057 D8D9 ] -- MOS30 0058 D8D9 -- MOS30 0059 D8D9 -- MOS30 0060 D8D9 ; composition -- MOS30 0061 D8D9 ; -- MOS30 0062 D8D9 0000 TRUE * &00 ;for conditional assembly -- MOS30 0063 D8D9 00FF FALSE * &FF ;for conditional assembly -- MOS30 0064 D8D9 -- MOS30 0065 D8D9 -- MOS30 0066 D8D9 ; options -- MOS30 0067 D8D9 ; -- MOS30 0068 D8D9 0000 INKYSW * TRUE -- MOS30 0069 D8D9 -- MOS30 0070 D8D9 -- MOS30 0071 D8D9 ; VDU software interface -- MOS30 0072 D8D9 ; -- MOS30 0073 D8D9 C300 VDUORG * &C300 ;VDU software module origin -- MOS30 0074 D8D9 C300 VDINIT * VDUORG +&00 ;initialise RAM and VDU -- MOS30 0075 D8D9 D8D9 ORIGIN * ENDVDU -- MOS30 0076 D8D9 -- MOS30 0077 D8D9 -- MOS30 0078 D8D9 ; tube interface -- MOS30 0079 D8D9 ; -- MOS30 0080 D8D9 ^ &0400 -- MOS30 0081 D8D9 0400 TBLANG # &03 ;enter language -- MOS30 0082 D8D9 0403 TBESC # &03 ;alter escape condition -- MOS30 0083 D8D9 0406 TBADDR # &03 ;address translation -- MOS30 0084 D8D9 -- MOS30 0085 D8D9 -- MOS30 0086 D8D9 -- MOS30 0087 D8D9 ; error codes -- MOS30 0088 D8D9 -- MOS30 0089 D8D9 ; special reports -- MOS30 0090 D8D9 ; -- MOS30 0091 D8D9 -- MOS30 0092 D8D9 -- MOS30 0093 D8D9 -- MOS30 0094 D8D9 ; infamous BASIC error number assignment boob -- MOS30 0095 D8D9 ; -- MOS30 0096 D8D9 -- MOS30 0097 D8D9 -- MOS30 0098 D8D9 -- MOS30 0099 D8D9 ; MOS errors -- MOS30 0100 D8D9 ; -- MOS30 0101 D8D9 -- MOS30 0102 D8D9 -- MOS30 0103 D8D9 -- MOS30 0104 D8D9 ; $FF is reserved for a non-trappable error in future systems -- MOS30 0105 D8D9 ; -- MOS30 0106 D8D9 00FE BADCMD * &FE ;'Bad command' -- MOS30 0107 D8D9 00FD BADST * &FD ;'Bad string' -- MOS30 0108 D8D9 00FC BADADR * &FC ;'Bad address' -- MOS30 0109 D8D9 00FB BADKY * &FB ;'Bad key' -- MOS30 0110 D8D9 00FA KEYUSE * &FA ;'Key in use' -- MOS30 0111 D8D9 00F9 NOLROM * &F9 ;'No language ROM' -- MOS30 0112 D8D9 00F8 NOFSYS * &F8 ;'No filing system' -- MOS30 0113 D8D9 00F7 FX0MSG * &F7 ;operating system version number -- MOS30 0114 D8D9 -- MOS30 0115 D8D9 -- MOS30 0116 D8D9 ; file system control operations -- MOS30 0117 D8D9 ; -- MOS30 0118 D8D9 0000 FSOPT * &00 ;*OPT x,y value assumed by FX code -- MOS30 0119 D8D9 0001 FSEOF * &01 ;EOF#chan value assumed by FX code -- MOS30 0120 D8D9 0002 FSNOTA * &02 ;*non-alpha -- MOS30 0121 D8D9 0003 FSNAME * &03 ;*name -- MOS30 0122 D8D9 0004 FSRUN * &04 ;*RUN name -- MOS30 0123 D8D9 0005 FSCAT * &05 ;*CAT name -- MOS30 0124 D8D9 0006 FSDIE * &06 ;kill filing system -- MOS30 0125 D8D9 0007 FSHRNG * &07 ;return handle range in X (lo) and Y (hi) -- MOS30 0126 D8D9 -- MOS30 0127 D8D9 0008 FSCLI * &08 ;*command encountered -- MOS30 0128 D8D9 -- MOS30 0129 D8D9 -- MOS30 0130 D8D9 ; user print operations -- MOS30 0131 D8D9 ; -- MOS30 0132 D8D9 0000 UPTIME * &00 ;timer interrupt -- MOS30 0133 D8D9 0001 UPWRCH * &01 ;write character -- MOS30 0134 D8D9 ; return C=0 => printer busy, C=1 => printer free -- MOS30 0135 D8D9 -- MOS30 0136 D8D9 -- MOS30 0137 D8D9 -- MOS30 0138 D8D9 -- MOS30 0139 D8D9 ; NET operations -- MOS30 0140 D8D9 ; -- MOS30 0141 D8D9 ; hi-level -- MOS30 0142 D8D9 ; -- MOS30 0143 D8D9 ; VALUES $01-$03,$05 RESERVED FOR PRINTER INTERFACE -- MOS30 0144 D8D9 0004 NTWRCH * &04 ;WRCH -- MOS30 0145 D8D9 0006 NTRDCH * &06 ;RDCH -- MOS30 0146 D8D9 -- MOS30 0147 D8D9 0008 NTWORD * &08 ;OSWORD call (c.f. SVWORD) -- MOS30 0148 D8D9 -- MOS30 0149 D8D9 -- MOS30 0150 D8D9 -- MOS30 0151 D8D9 ; service ROM operations -- MOS30 0152 D8D9 ; -- MOS30 0153 D8D9 0010 NROM * &0010 ;number of paged ROMs -- MOS30 0154 D8D9 -- MOS30 0155 D8D9 0000 SVNOP * &00 ;no operation -- MOS30 0156 D8D9 0001 SVSTAT * &01 ;offer static allocation -- MOS30 0157 D8D9 0002 SVDYN * &02 ;offer dynamic allocation -- MOS30 0158 D8D9 0003 SVBOOT * &03 ;offer bootstrap MOS30 MOS30 MOS30 MOS30 Acorn macro assembler Page 45 MOS30 MOS30 Manifests MOS30 -- MOS30 0159 D8D9 0004 SVNAME * &04 ;offer command -- MOS30 0160 D8D9 0005 SVINT * &05 ;unknown interrupt -- MOS30 0161 D8D9 0006 SVBRK * &06 ;offer BRK -- MOS30 0162 D8D9 0007 SVBYTE * &07 ;offer bad OSBYTE (N.B. also NTxxxx code) -- MOS30 0163 D8D9 0008 SVWORD * &08 ;offer bad OSWORD (N.B. also NTxxxx code) -- MOS30 0164 D8D9 ; -- MOS30 0165 D8D9 [ FALSE=0 -- MOS30 0167 D8D9 | -- MOS30 0168 D8D9 0009 SVHELP * &09 ;*HELP facility -- MOS30 0169 D8D9 ] -- MOS30 0170 D8D9 ; -- MOS30 0171 D8D9 000A SVCSHR * &0A ;claim shared workspace -- MOS30 0172 D8D9 000B SVRNMI * &0B ;release NMI -- MOS30 0173 D8D9 000C SVCNMI * &0C ;claim NMI -- MOS30 0174 D8D9 000D SVISFS * &0D ;initialise speech filing system -- MOS30 0175 D8D9 000E SVRSFS * &0E ;read from speech filing system -- MOS30 0176 D8D9 000F SVFSIC * &0F ;changed filing system indirections -- MOS30 0177 D8D9 -- MOS30 0178 D8D9 0010 SVSHES * &10 ;shut EXEC and SPOOL files -- MOS30 0179 D8D9 0011 SVHWMC * &11 ;change of HWM ******** DO NOT CHANGE ******** -- MOS30 0180 D8D9 0012 SVSTFS * &12 ;start filing system N -- MOS30 0181 D8D9 00FE SVTPIN * &FE ;tube post-initialisation **** VALUE ASSUMED BY RESET **** -- MOS30 0182 D8D9 00FF SVTUBE * &FF ;initialise tube software -- MOS30 0183 D8D9 -- MOS30 0184 D8D9 -- MOS30 0185 D8D9 ; language entry reasons -- MOS30 0186 D8D9 ; -- MOS30 0187 D8D9 0000 LGNONE * &00 ;no language ROM (tube entry reason) -- MOS30 0188 D8D9 0001 LGENTR * &01 ;enter language -- MOS30 0189 D8D9 -- MOS30 0190 D8D9 -- MOS30 0191 D8D9 ; RS423 transmitter control bits -- MOS30 0192 D8D9 ; -- MOS30 0193 D8D9 0000 RHITXD * &00 ;RTS hi, Tx interrupt disabled -- MOS30 0194 D8D9 0020 RHITXE * &20 ;RTS hi, Tx interrupt enabled -- MOS30 0195 D8D9 0040 RLOTXD * &40 ;RTS lo, Tx interrupt disabled -- MOS30 0196 D8D9 0060 RHITXB * &60 ;RTS hi, Tx break -- MOS30 0197 D8D9 0056 RSCDEF * &16+RLOTXD ;Rx interrupt disabled ... -- MOS30 0198 D8D9 ; ... RTS lo, Tx interrupt disabled, divide by 64, 8 data bits, 1 stop bit -- MOS30 0199 D8D9 -- MOS30 0200 D8D9 -- MOS30 0201 D8D9 ; speech processor opcodes -- MOS30 0202 D8D9 ; -- MOS30 0203 D8D9 0010 SPOPRB * &10 ;read byte -- MOS30 0204 D8D9 0060 SPOPSE * &60 ;speak external -- MOS30 0205 D8D9 0030 SPOPBR * &30 ;read and branch -- MOS30 0206 D8D9 0040 SPOPLA * &40 ;load address -- MOS30 0207 D8D9 0050 SPOPSP * &50 ;speak -- MOS30 0208 D8D9 00FF SPOPRT * &FF ;reset -- MOS30 0209 D8D9 -- MOS30 0210 D8D9 -- MOS30 0211 D8D9 ; memory map assignments -- MOS30 0212 D8D9 ; -- MOS30 0213 D8D9 FC00 FRED * &FC00 -- MOS30 0214 D8D9 FCFF MEG1P * &FCFF ;1MHz bus page selector -- MOS30 0215 D8D9 FD00 JIM * &FD00 -- MOS30 0216 D8D9 FE00 SHEIL * &FE00 -- MOS30 0217 D8D9 FE08 ACIA * &FE08 -- MOS30 0218 D8D9 FE10 SERPRC * &FE10 ;serial processor -- MOS30 0219 D8D9 -- MOS30 0220 D8D9 FE20 VPROC0 * &FE20 ;video processor -- MOS30 0221 D8D9 FE21 VPROC1 * VPROC0 +&01 -- MOS30 0222 D8D9 FE20 STNID * &FE20 ;ECONET station identifier -- MOS30 0223 D8D9 FE30 ROM * &FE30 ;ROM select latch -- MOS30 0224 D8D9 FE40 VIAA * &FE40 ;first 6522 -- MOS30 0225 D8D9 FE60 VIAB * &FE60 ;second 6522 -- MOS30 0226 D8D9 -- MOS30 0227 D8D9 -- MOS30 0228 D8D9 ; analog to digital converter -- MOS30 0229 D8D9 ; -- MOS30 0230 D8D9 FEC0 ADCONV * &FEC0 -- MOS30 0231 D8D9 FEC0 ADCCTL * ADCONV +&00 -- MOS30 0232 D8D9 FEC1 ADCHI * ADCONV +&01 -- MOS30 0233 D8D9 FEC2 ADCLO * ADCONV +&02 -- MOS30 0234 D8D9 -- MOS30 0235 D8D9 -- MOS30 0236 D8D9 ; tube register(s) -- MOS30 0237 D8D9 ; -- MOS30 0238 D8D9 FEE0 TREG0 * &FEE0 -- MOS30 0239 D8D9 FEE5 TREG3 * &FEE5 -- MOS30 0240 D8D9 -- MOS30 0241 D8D9 -- MOS30 0242 D8D9 -- MOS30 0243 D8D9 ; test software indirection -- MOS30 0244 D8D9 ; -- MOS30 0245 D8D9 FDFE TSTSFT * &FDFE -- MOS30 0246 D8D9 -- MOS30 0247 D8D9 -- MOS30 0248 D8D9 ; language ROM address -- MOS30 0249 D8D9 ; -- MOS30 0250 D8D9 8000 LANG * &8000 -- MOS30 0251 D8D9 8000 ROMHRD * LANG +&00 ;hard ROM entry point -- MOS30 0252 D8D9 8003 ROMSFT * LANG +&03 ;soft ROM entry point -- MOS30 0253 D8D9 -- MOS30 0254 D8D9 8006 ROMTYP * LANG +&06 ;ROM type -- MOS30 0255 D8D9 8007 COPYRP * LANG +&07 ;relative offset (from LANG) to copyright string -- MOS30 0256 D8D9 8008 ROMVER * LANG +&08 ;version byte -- MOS30 0257 D8D9 8009 ROMMSG * LANG +&09 ;name -- MOS30 0258 D8D9 -- MOS30 0259 D8D9 -- MOS30 0260 D8D9 ; miscellaneous constants -- MOS30 0261 D8D9 ; -- MOS30 0262 D8D9 0000 ZERO * &00 -- MOS30 0263 D8D9 0000 NULL * ZERO ;don't care value -- MOS30 0264 D8D9 0020 SPACE * &20 -- MOS30 0265 D8D9 0040 AT * &40 -- MOS30 0266 D8D9 0041 ALPHAA * "A" -- MOS30 0267 D8D9 0022 DQUOTE * """" -- MOS30 0268 D8D9 002A SPLAT * "*" -- MOS30 0269 D8D9 0060 POUND * &60 -- MOS30 0270 D8D9 -- MOS30 0271 D8D9 -- MOS30 0272 D8D9 -- MOS30 0273 D8D9 0007 BEL * &07 -- MOS30 0274 D8D9 -- MOS30 0275 D8D9 0009 MHT * &09 -- MOS30 0276 D8D9 0009 TAB * MHT -- MOS30 0277 D8D9 000A MLF * &0A -- MOS30 0278 D8D9 000D MCR * &0D -- MOS30 0279 D8D9 0015 MNAK * &15 -- MOS30 0280 D8D9 MOS30 MOS30 MOS30 MOS30 Acorn macro assembler Page 46 MOS30 MOS30 Manifests MOS30 -- MOS30 0281 D8D9 001B ESC * &1B -- MOS30 0282 D8D9 007F MDEL * &7F -- MOS30 0283 D8D9 -- MOS30 0284 D8D9 -- MOS30 0285 D8D9 ; real softkeys -- MOS30 0286 D8D9 ; -- MOS30 0287 D8D9 0080 SOFTK0 * &0080 ;f0 (value must NOT be altered) -- MOS30 0288 D8D9 0081 SOFTK1 * SOFTK0 +&01 ;f1 -- MOS30 0289 D8D9 0082 SOFTK2 * SOFTK1 +&01 ;f2 -- MOS30 0290 D8D9 0083 SOFTK3 * SOFTK2 +&01 ;f3 -- MOS30 0291 D8D9 0084 SOFTK4 * SOFTK3 +&01 ;f4 -- MOS30 0292 D8D9 0085 SOFTK5 * SOFTK4 +&01 ;f5 -- MOS30 0293 D8D9 0086 SOFTK6 * SOFTK5 +&01 ;f6 -- MOS30 0294 D8D9 0087 SOFTK7 * SOFTK6 +&01 ;f7 -- MOS30 0295 D8D9 0088 SOFTK8 * SOFTK7 +&01 ;f8 -- MOS30 0296 D8D9 0089 SOFTK9 * SOFTK8 +&01 ;f9 -- MOS30 0297 D8D9 -- MOS30 0298 D8D9 -- MOS30 0299 D8D9 ; pseudo softkeys, including cursor controls -- MOS30 0300 D8D9 ; -- MOS30 0301 D8D9 008A SOFTKA * SOFTK9 +&01 -- MOS30 0302 D8D9 008B SOFTKB * SOFTKA +&01 ;COPY -- MOS30 0303 D8D9 008B MCOPY * SOFTKB -- MOS30 0304 D8D9 008C SOFTKC * SOFTKB +&01 ;cursor left arrow -- MOS30 0305 D8D9 008C CURLFT * SOFTKC -- MOS30 0306 D8D9 008D SOFTKD * SOFTKC +&01 ;cursor right arrow -- MOS30 0307 D8D9 008D CURRHT * SOFTKD -- MOS30 0308 D8D9 008E SOFTKE * SOFTKD +&01 ;cursor down -- MOS30 0309 D8D9 008E CURDWN * SOFTKE -- MOS30 0310 D8D9 008F SOFTKF * SOFTKE +&01 ;cursor up -- MOS30 0311 D8D9 008F CURUP * SOFTKF -- MOS30 0312 D8D9 00BF MAXSK * &BF ;maximum value of SHIFT/CTRL softkey code -- MOS30 0313 D8D9 00CA BREKEY * &CA ;softkey 10 feature -- MOS30 0314 D8D9 -- MOS30 0315 D8D9 -- MOS30 0316 D8D9 ; default auto-repeat rates -- MOS30 0317 D8D9 ; -- MOS30 0318 D8D9 0032 DAUTOD * 50 ;delay (centiseconds) -- MOS30 0319 D8D9 0008 DAUTOP * 8 ;period (centiseconds) -- MOS30 0320 D8D9 -- MOS30 0321 D8D9 -- MOS30 0322 D8D9 ; default RS423 baud rates -- MOS30 0323 D8D9 ; -- MOS30 0324 D8D9 0064 B9600 * &64 ;Tx9600 and Rx9600 -- MOS30 0325 D8D9 -- MOS30 0326 D8D9 -- MOS30 0327 D8D9 ; RS423 printer timeout period -- MOS30 0328 D8D9 ; -- MOS30 0329 D8D9 00E7 PTIMUT * &E7 ;(-) 25/50 second -- MOS30 0330 D8D9 -- MOS30 0331 D8D9 -- MOS30 0332 D8D9 ; OS constants -- MOS30 0333 D8D9 0E00 OSHWM * &0E00 ;default high water mark -- MOS30 0334 D8D9 0D00 NMI * &0D00 -- MOS30 0335 D8D9 -- MOS30 0336 D8D9 -- MOS30 0337 D8D9 ; buffer indices -- MOS30 0338 D8D9 ; -- MOS30 0339 D8D9 0000 BRDCH * &0000 ;RDCH (keyboard) -- MOS30 0340 D8D9 0001 BRSI * &0001 ;RS423 input -- MOS30 0341 D8D9 0001 INPUT * BRSI -- MOS30 0342 D8D9 0002 BRSO * &0002 ;RS423 output -- MOS30 0343 D8D9 0002 OUTPUT * BRSO -- MOS30 0344 D8D9 0003 BPRNT * &0003 ;print -- MOS30 0345 D8D9 0004 BSND1 * &0004 ;sound channel 1 -- MOS30 0346 D8D9 0005 BSND2 * BSND1+&1 ;sound channel 2 -- MOS30 0347 D8D9 0006 BSND3 * BSND2+&1 ;sound channel 3 -- MOS30 0348 D8D9 0007 BSND4 * BSND3+&1 ;sound channel 4 -- MOS30 0349 D8D9 0008 BSPCH * BSND4+&1 ;speech -- MOS30 0350 D8D9 0008 BUPB * BSPCH -- MOS30 0351 D8D9 -- MOS30 0352 D8D9 -- MOS30 0353 D8D9 ; keyboard status bits -- MOS30 0354 D8D9 ; -- MOS30 0355 D8D9 0008 SHFT * &08 ;SHIFT active -- MOS30 0356 D8D9 0010 CAPSL * &10 ;not CAPITALS lock -- MOS30 0357 D8D9 0020 SHFTL * &20 ;not SHIFT lock -- MOS30 0358 D8D9 0040 CTRL * &40 ;CTRL active -- MOS30 0359 D8D9 0080 INVERT * &80 ;SHIFT enable -- MOS30 0360 D8D9 00B7 CTLSHI * &B7 ;inverted (CTRL and SHIFT status bits) -- MOS30 0361 D8D9 -- MOS30 0362 D8D9 -- MOS30 0363 D8D9 ; keyboard matrix element values -- MOS30 0364 D8D9 ; -- MOS30 0365 D8D9 00C0 CPLKKY * &C0 ;CAPITALS lock key -- MOS30 0366 D8D9 00D0 SHLKKY * &D0 ;SHIFT lock key -- MOS30 0367 D8D9 -- MOS30 0368 D8D9 -- MOS30 0369 D8D9 ; FX numbers -- MOS30 0370 D8D9 ; -- MOS30 0371 D8D9 0088 FXCODE * &88 -- MOS30 0372 D8D9 0089 FXMOTR * &89 -- MOS30 0373 D8D9 008B FXOPT * &8B -- MOS30 0374 D8D9 008C FXTAPE * &8C -- MOS30 0375 D8D9 008D FXSROM * &8D -- MOS30 0376 D8D9 0090 FXTV * &90 -- MOS30 0377 D8D9 -- MOS30 0378 D8D9 -- MOS30 0379 D8D9 ; MC6850 addresses -- MOS30 0380 D8D9 ; -- MOS30 0381 D8D9 FE08 RSCTL * ACIA -- MOS30 0382 D8D9 FE08 RSTAT * ACIA -- MOS30 0383 D8D9 FE09 RSDATA * ACIA +&01 -- MOS30 0384 D8D9 -- MOS30 0385 D8D9 -- MOS30 0386 D8D9 ; miscellaneous -- MOS30 0387 D8D9 ; -- MOS30 0388 D8D9 0004 NADC * &04 ;number of ADC channels -- MOS30 0389 D8D9 -- MOS30 0390 D8D9 -- MOS30 0391 D8D9 ; 6522 addresses -- MOS30 0392 D8D9 ; -- MOS30 0393 D8D9 FE40 PBQ * VIAA -- MOS30 0394 D8D9 FE41 PAQ * VIAA +&01 -- MOS30 0395 D8D9 FE42 DDRBQ * VIAA +&02 -- MOS30 0396 D8D9 FE43 DDRAQ * VIAA +&03 -- MOS30 0397 D8D9 FE44 TQCLQ * VIAA +&04 -- MOS30 0398 D8D9 FE45 TQCHQ * VIAA +&05 -- MOS30 0399 D8D9 FE46 TQLLQ * VIAA +&06 -- MOS30 0400 D8D9 FE47 TQLHQ * VIAA +&07 -- MOS30 0401 D8D9 FE48 TRCLQ * VIAA +&08 MOS30 MOS30 MOS30 MOS30 Acorn macro assembler Page 47 MOS30 MOS30 Manifests MOS30 -- MOS30 0402 D8D9 FE49 TRCHQ * VIAA +&09 -- MOS30 0403 D8D9 FE4A SRQ * VIAA +&0A -- MOS30 0404 D8D9 FE4B ACRQ * VIAA +&0B -- MOS30 0405 D8D9 FE4C PCRQ * VIAA +&0C -- MOS30 0406 D8D9 000A CAPULS * &0A -- MOS30 0407 D8D9 000C CA2LO * &0C -- MOS30 0408 D8D9 000E CA2HI * &0E -- MOS30 0409 D8D9 00A0 CBPULS * &A0 -- MOS30 0410 D8D9 00C0 CB2LO * &C0 -- MOS30 0411 D8D9 00E0 CB2HI * &E0 -- MOS30 0412 D8D9 FE4D IFRQ * VIAA +&0D -- MOS30 0413 D8D9 FE4E IERQ * VIAA +&0E -- MOS30 0414 D8D9 FE4F PAPQ * VIAA +&0F -- MOS30 0415 D8D9 FE60 PBR * VIAB -- MOS30 0416 D8D9 FE61 PAR * VIAB +&01 -- MOS30 0417 D8D9 FE62 DDRBR * VIAB +&02 -- MOS30 0418 D8D9 FE63 DDRAR * VIAB +&03 -- MOS30 0419 D8D9 FE64 TQCLR * VIAB +&04 -- MOS30 0420 D8D9 FE65 TQCHR * VIAB +&05 -- MOS30 0421 D8D9 FE66 TQLLR * VIAB +&06 -- MOS30 0422 D8D9 FE67 TQLHR * VIAB +&07 -- MOS30 0423 D8D9 FE68 TRCLR * VIAB +&08 -- MOS30 0424 D8D9 FE69 TRCHR * VIAB +&09 -- MOS30 0425 D8D9 FE6A SRR * VIAB +&0A -- MOS30 0426 D8D9 FE6B ACRR * VIAB +&0B -- MOS30 0427 D8D9 FE6C PCRR * VIAB +&0C -- MOS30 0428 D8D9 FE6D IFRR * VIAB +&0D -- MOS30 0429 D8D9 FE6E IERR * VIAB +&0E -- MOS30 0430 D8D9 FE6F PAPR * VIAB +&0F -- MOS30 0431 D8D9 -- MOS30 0432 D8D9 -- MOS30 0433 D8D9 ; interrupt flags in 6522 IER and IFR -- MOS30 0434 D8D9 ; -- MOS30 0435 D8D9 0002 CA1 * &0002 -- MOS30 0436 D8D9 0001 CA2 * &0001 -- MOS30 0437 D8D9 0010 CB1 * &0010 -- MOS30 0438 D8D9 0008 CB2 * &0008 -- MOS30 0439 D8D9 0040 TIMER1 * &0040 -- MOS30 0440 D8D9 0020 TIMER2 * &0020 -- MOS30 0441 D8D9 -- MOS30 0442 D8D9 -- MOS30 0443 D8D9 ; VIA pin assignments -- MOS30 0444 D8D9 ; -- MOS30 0445 D8D9 ; VIAA:- -- MOS30 0446 D8D9 ; PA7-PA0 keyboard -- MOS30 0447 D8D9 ; CA1 VSYNC interrupt -- MOS30 0448 D8D9 0002 VSYNC * CA1 -- MOS30 0449 D8D9 ; CA2 keyboard interrupt ('any key down') -- MOS30 0450 D8D9 0001 KEYBD * CA2 -- MOS30 0451 D8D9 ; PB7 VSP interrupt -- MOS30 0452 D8D9 ; PB6 VSP ready -- MOS30 0453 D8D9 ; PB5,PB4 paddle -- MOS30 0454 D8D9 ; PB3-PB0 addressable latch -- MOS30 0455 D8D9 ; PB3 data value -- MOS30 0456 D8D9 ; PB2-PB0 latch register -- MOS30 0457 D8D9 ; 0 sound enable -- MOS30 0458 D8D9 ; 1 speech RS -- MOS30 0459 D8D9 ; 2 speech WS -- MOS30 0460 D8D9 ; 3 keyboard disable -- MOS30 0461 D8D9 ; 4,5 hardware scroll -- MOS30 0462 D8D9 ; 6,7 ROM select -- MOS30 0463 D8D9 ; CB1 ADC -- MOS30 0464 D8D9 0010 ADC * CB1 -- MOS30 0465 D8D9 ; CB2 light pen -- MOS30 0466 D8D9 -- MOS30 0467 D8D9 ; VIAB:- -- MOS30 0468 D8D9 ; PA7-PA0 printer output -- MOS30 0469 D8D9 ; CA1 printer acknowledge -- MOS30 0470 D8D9 0002 PRNT * CA1 -- MOS30 0471 D8D9 ; CA2 printer strobe -- MOS30 0472 D8D9 ; PB7-PB0 reserved for user -- MOS30 0473 D8D9 ; CB1 reserved for user -- MOS30 0474 D8D9 ; CB2 reserved for user -- MOS30 0475 D8D9 ; TIMER 1 = MAIN CLOCK -- MOS30 0476 D8D9 0040 CLOCK * TIMER1 -- MOS30 0477 D8D9 -- MOS30 0478 D8D9 -- MOS30 0479 D8D9 ; page one is main system stack -- MOS30 0480 D8D9 ; -- MOS30 0481 D8D9 00FF STACK * &FF -- MOS30 0482 D8D9 -- MOS30 0483 D8D9 -- MOS30 0484 D8D9 -- MOS30 0485 D8D9 ; BUFFERS -- MOS30 0486 D8D9 -- MOS30 0487 D8D9 -- MOS30 0488 D8D9 ; keyboard -- MOS30 0489 D8D9 ; -- MOS30 0490 D8D9 03E0 RDCHBF * &03E0 ;RDCH (keyboard) buffer -- MOS30 0491 D8D9 0020 RDCHSZ * &0020 -- MOS30 0492 D8D9 -- MOS30 0493 D8D9 -- MOS30 0494 D8D9 ; sound -- MOS30 0495 D8D9 ; -- MOS30 0496 D8D9 0800 SNDWRK * &0800 ;sound workspace -- MOS30 0497 D8D9 0804 MACTIV * SNDWRK+&04 ;activation flags -- MOS30 0498 D8D9 -- MOS30 0499 D8D9 0840 SNDBF1 * &0840 ;sound buffer channel 1 -- MOS30 0500 D8D9 0010 SBSIZE * &0010 ;sound buffer size -- MOS30 0501 D8D9 0850 SNDBF2 * SNDBF1+SBSIZE ;sound buffer channel 2 -- MOS30 0502 D8D9 0860 SNDBF3 * SNDBF2+SBSIZE ;sound buffer channel 3 -- MOS30 0503 D8D9 0870 SNDBF4 * SNDBF3+SBSIZE ;sound buffer channel 4 -- MOS30 0504 D8D9 -- MOS30 0505 D8D9 -- MOS30 0506 D8D9 ; printer -- MOS30 0507 D8D9 ; -- MOS30 0508 D8D9 0880 PRNBF * &0880 ;print buffer -- MOS30 0509 D8D9 0040 PRNSZ * &0040 -- MOS30 0510 D8D9 -- MOS30 0511 D8D9 -- MOS30 0512 D8D9 ; envelopes -- MOS30 0513 D8D9 ; -- MOS30 0514 D8D9 08C0 ENVEL * &08C0 ;sound envelopes -- MOS30 0515 D8D9 0010 ENVSIZ * &0010 ;size of each envelope -- MOS30 0516 D8D9 0004 NENV * &0004 ;number of envelopes -- MOS30 0517 D8D9 -- MOS30 0518 D8D9 -- MOS30 0519 D8D9 ; RS423 output -- MOS30 0520 D8D9 ; -- MOS30 0521 D8D9 0900 RSROBF * &0900 ;RS423 output -- MOS30 0522 D8D9 00C0 RSROSZ * &00C0 MOS30 MOS30 MOS30 MOS30 Acorn macro assembler Page 48 MOS30 MOS30 Manifests MOS30 -- MOS30 0523 D8D9 -- MOS30 0524 D8D9 -- MOS30 0525 D8D9 ; speech -- MOS30 0526 D8D9 ; -- MOS30 0527 D8D9 09C0 SPCHBF * &09C0 ;speech buffer -- MOS30 0528 D8D9 0040 SPCHSZ * &0040 -- MOS30 0529 D8D9 -- MOS30 0530 D8D9 -- MOS30 0531 D8D9 ; RS423 input -- MOS30 0532 D8D9 ; -- MOS30 0533 D8D9 0A00 RSRIBF * &0A00 ;RS423 input -- MOS30 0534 D8D9 0100 RSRISZ * &0100 -- MOS30 0535 D8D9 0008 RSOVR * 8 ;handshake overflow allowance -- MOS30 0536 D8D9 -- MOS30 0537 D8D9 -- MOS30 0538 D8D9 ; soft key buffer -- MOS30 0539 D8D9 ; -- MOS30 0540 D8D9 0B00 SKPTR * &0B00 ;pointers to soft key strings -- MOS30 0541 D8D9 0010 NSOFTK * 16 -- MOS30 0542 D8D9 0B01 SKBUF * SKPTR+&01 ;N.B. soft key pointers are relative to this origin -- MOS30 0543 D8D9 0B10 SKEND * SKPTR+NSOFTK ;logical end of string -- MOS30 0544 D8D9 00EF TOTSFT * SKPTR+&0100-SKEND-&01 ;soft key data byte size -- MOS30 0545 D8D9 -- MOS30 0546 D8D9 -- MOS30 0547 D8D9 LNK MOS32 -- MOS32 0001 D8D9 -- MOS32 0002 D8D9 ; -> MOS32 -- MOS32 0003 D8D9 TTL MOS32 Initialisation and external interfaces -- MOS32 0004 D8D9 OPT MOS32 MOS32 MOS32 MOS32 MOS32 Acorn macro assembler Page 49 MOS32 MOS32 Initialisation and external interfaces MOS32 -- MOS32 0005 D8D9 ;(c) 1981 ACORN Computers Limited -- MOS32 0006 D8D9 ;BBC Microcomputer Machine Operating System (MOS) -- MOS32 0007 D8D9 ;Change record: -- MOS32 0008 D8D9 ;Author(s): -- MOS32 0009 D8D9 ;PB Paul Bond -- MOS32 0010 D8D9 ;MP Mike Prees -- MOS32 0011 D8D9 -- MOS32 0012 D8D9 -- MOS32 0013 D8D9 ; origin of real code -- MOS32 0014 D8D9 ORG ORIGIN ;MOS starts where VDU ends -- MOS32 0015 D8D9 -- MOS32 0016 D8D9 -- MOS32 0017 D8D9 IPAGE0 ;page zero values -- MOS32 0018 D8D9 ; externally accessed zero page values -- MOS32 0019 D8D9 ^ &00FF -- MOS32 0020 D8D9 ; -- MOS32 0021 D8D9 00FF ESCFLG # 0 ;Bit 7 of this is the escape flag -- MOS32 0022 D8D9 -- MOS32 0023 D8D9 -- MOS32 0024 D8D9 ; bit7 escape pending -- MOS32 0025 D8D9 ;= ZERO -- MOS32 0026 D8D9 -- MOS32 0027 D8D9 00FF # -2 -- MOS32 0028 D8D9 00FD REPTR # &00 ;pointer after BRK -- MOS32 0029 D8D9 ;= NULL /;hi-byte -- MOS32 0030 D8D9 ;= NULL ;lo-byte -- MOS32 0031 D8D9 -- MOS32 0032 D8D9 00FD # -1 -- MOS32 0033 D8D9 00FC TEMPA # &00 ;user IRQ routine save slot for register A -- MOS32 0034 D8D9 ;= NULL -- MOS32 0035 D8D9 -- MOS32 0036 D8D9 00FC # -2 -- MOS32 0037 D8D9 00FA SEIWK # &00 ;two work slots used whilst interrupts disabled -- MOS32 0038 D8D9 ; -- MOS32 0039 D8D9 00FA JMILO * SEIWK +&00 ;used by OSBYTE/OSWORD -- MOS32 0040 D8D9 00FB JMIHI * SEIWK +&01 ;used by OSBYTE/OSWORD -- MOS32 0041 D8D9 ; -- MOS32 0042 D8D9 00FA KEYSV * SEIWK +&00 ;work area for ... -- MOS32 0043 D8D9 00FB SKSZWK * SEIWK +&01 ; ... soft key compaction (also SKSIZE) -- MOS32 0044 D8D9 ; -- MOS32 0045 D8D9 00FA KTEMP * SEIWK +&00 ;work area for keyboard -- MOS32 0046 D8D9 ; -- MOS32 0047 D8D9 00FA BUFFLO * SEIWK +&00 ;work slots used by buffer management -- MOS32 0048 D8D9 00FB BUFFHI * SEIWK +&01 -- MOS32 0049 D8D9 ; -- MOS32 0050 D8D9 00FA CRLO * SEIWK +&00 ;work slots used during ROM compare -- MOS32 0051 D8D9 00FB CRHI * SEIWK +&01 -- MOS32 0052 D8D9 ; -- MOS32 0053 D8D9 00FA MASK * SEIWK +&00 ;work slots used by set Rx/Tx RS423 baud rates -- MOS32 0054 D8D9 00FB BAUD * SEIWK +&01 -- MOS32 0055 D8D9 ; -- MOS32 0056 D8D9 00FA RSOP * SEIWK +&00 ;work slot used by RSUCTL -- MOS32 0057 D8D9 ; -- MOS32 0058 D8D9 00FA NOTEWK * SEIWK +&00 ;work slot used by NOTE -- MOS32 0059 D8D9 ; -- MOS32 0060 D8D9 00FA EVENTA * SEIWK +&00 ;work slot used by EVENT (hopefully no clashes) -- MOS32 0061 D8D9 ; -- MOS32 0062 D8D9 00FA PEEKLO * SEIWK +&00 ;work slot used by OSWORD read-byte/write-byte -- MOS32 0063 D8D9 00FB PEEKHI * SEIWK +&01 -- MOS32 0064 D8D9 ; -- MOS32 0065 D8D9 00FA SPWK1 * SEIWK +&00 ;used by speech sprocessing -- MOS32 0066 D8D9 00FB SPWK2 * SEIWK +&01 ;used by TIMER2 (speech) interrupt routine -- MOS32 0067 D8D9 -- MOS32 0068 D8D9 00FA # -1 -- MOS32 0069 D8D9 00F9 SPARE0 # &00 ;**************** -- MOS32 0070 D8D9 ; = NULL -- MOS32 0071 D8D9 -- MOS32 0072 D8D9 00F9 # -1 -- MOS32 0073 D8D9 00F8 SPARE1 # &00 ;**************** -- MOS32 0074 D8D9 ;= NULL -- MOS32 0075 D8D9 -- MOS32 0076 D8D9 00F8 # -2 -- MOS32 0077 D8D9 00F6 ROMPTR # &00 ;pointer used by ROM filing system -- MOS32 0078 D8D9 ;= NULL -- MOS32 0079 D8D9 ;= NULL -- MOS32 0080 D8D9 -- MOS32 0081 D8D9 00F6 # -1 -- MOS32 0082 D8D9 00F5 SEROM # &00 ;serial ROM id -- MOS32 0083 D8D9 ;= NULL -- MOS32 0084 D8D9 -- MOS32 0085 D8D9 00F5 # -1 -- MOS32 0086 D8D9 00F4 ROMID # &00 ;currently selected ROM -- MOS32 0087 D8D9 -- MOS32 0088 D8D9 ;= NULL -- MOS32 0089 D8D9 -- MOS32 0090 D8D9 00F4 # -2 -- MOS32 0091 D8D9 00F2 WORK # &00 ;miscellaneous pointer -- MOS32 0092 D8D9 ;= NULL -- MOS32 0093 D8D9 ;= NULL -- MOS32 0094 D8D9 -- MOS32 0095 D8D9 00F2 # -2 -- MOS32 0096 D8D9 ; WORD values may be shared with other sei-routines -- MOS32 0097 D8D9 00F0 WORDX # &00 -- MOS32 0098 D8D9 00F0 BYTEX * WORDX -- MOS32 0099 D8D9 00F1 WORDY * WORDX +&01 -- MOS32 0100 D8D9 00F1 BYTEY * WORDY -- MOS32 0101 D8D9 -- MOS32 0102 D8D9 00F0 # -1 -- MOS32 0103 D8D9 00EF WORDA # &00 -- MOS32 0104 D8D9 00EF BYTEA * WORDA -- MOS32 0105 D8D9 ;= NULL -- MOS32 0106 D8D9 -- MOS32 0107 D8D9 00EF # -1 -- MOS32 0108 D8D9 00EE PAGE1M # &00 ;selected page for 1MHz bus -- MOS32 0109 D8D9 ;= ZERO -- MOS32 0110 D8D9 -- MOS32 0111 D8D9 00EE # -1 -- MOS32 0112 D8D9 00ED OKEY # &00 ;current key value -- MOS32 0113 D8D9 ;= ZERO -- MOS32 0114 D8D9 -- MOS32 0115 D8D9 00ED # -1 -- MOS32 0116 D8D9 00EC CKEY # &00 ;current key value -- MOS32 0117 D8D9 ;= ZERO -- MOS32 0118 D8D9 -- MOS32 0119 D8D9 00EC # -1 -- MOS32 0120 D8D9 00EB ESSEMA # &00 ;EXEC/SPOOL semaphore (used by CFS) -- MOS32 0121 D8D9 -- MOS32 0122 D8D9 -- MOS32 0123 D8D9 00EB # -1 -- MOS32 0124 D8D9 00EA RSTUT # &00 ;RS423 printer timeouT -- MOS32 0125 D8D9 ;= ZERO MOS32 MOS32 MOS32 MOS32 Acorn macro assembler Page 50 MOS32 MOS32 Initialisation and external interfaces MOS32 -- MOS32 0126 D8D9 -- MOS32 0127 D8D9 00EA # -2 -- MOS32 0128 D8D9 00E8 RDLNBF # &00 ;buffer address used by OSWORD readline routine -- MOS32 0129 D8D9 -- MOS32 0130 D8D9 00E8 # -1 -- MOS32 0131 D8D9 00E7 ARCTR # &00 ;auto-repeat counter -- MOS32 0132 D8D9 ;= ZERO -- MOS32 0133 D8D9 -- MOS32 0134 D8D9 00E7 # -1 -- MOS32 0135 D8D9 00E6 WRKCLI # &00 ;shared work slot with interrupts enabled -- MOS32 0136 D8D9 ; -- MOS32 0137 D8D9 00E6 RDCTEM * WRKCLI ;used by RDCH -- MOS32 0138 D8D9 00E6 CLIRY * WRKCLI ;used by CLI decoder -- MOS32 0139 D8D9 ; -- MOS32 0140 D8D9 00E6 NUMBER * WRKCLI ;work slot for GETNUM -- MOS32 0141 D8D9 00E6 CSKEY * NUMBER ;current softkey number (must not share with KMASK or KQUOTE) -- MOS32 0142 D8D9 ; -- MOS32 0143 D8D9 00E6 FILEY * WRKCLI ;save area for register Y -- MOS32 0144 D8D9 00E6 EXECY * FILEY ;save area used by EXEC -- MOS32 0145 D8D9 -- MOS32 0146 D8D9 00E6 SPOOLY * FILEY ;save area used by SPOOL -- MOS32 0147 D8D9 ;= NULL -- MOS32 0148 D8D9 -- MOS32 0149 D8D9 00E6 # -1 -- MOS32 0150 D8D9 00E5 FXREGX # &00 ;used by FX CLI command -- MOS32 0151 D8D9 00E5 KMASK # &00 ;used by GSREAD -- MOS32 0152 D8D9 ; must not be shared with CSKEY -- MOS32 0153 D8D9 ;= NULL -- MOS32 0154 D8D9 -- MOS32 0155 D8D9 00E5 # -1 -- MOS32 0156 D8D9 00E4 FXREGY # &00 ;used by FX CLI command -- MOS32 0157 D8D9 00E4 KQUOTE # &00 ;must not be shared with KMASK -- MOS32 0158 D8D9 ; must not be shared with CSKEY -- MOS32 0159 D8D9 ;= NULL -- MOS32 0160 D8D9 -- MOS32 0161 D8D9 00E4 # -1 -- MOS32 0162 D8D9 00E3 CFS1 # &00 ;reserved for CFS -- MOS32 0163 D8D9 -- MOS32 0164 D8D9 00E3 # -1 -- MOS32 0165 D8D9 ; -- MOS32 0166 D8D9 ; CFS workspace -- MOS32 0167 D8D9 ; ============= -- MOS32 0168 D8D9 ; -- MOS32 0169 D8D9 00E2 CFS0 # &00 ;reserved for CFS -- MOS32 0170 D8D9 00E2 CFSTAT * CFS0 -- MOS32 0171 D8D9 ;PAGE ZERO -- MOS32 0172 D8D9 -- MOS32 0173 D8D9 00B0 PZERO * &00B0 ;Start of p.0 workspace -- MOS32 0174 D8D9 -- MOS32 0175 D8D9 00B0 BKADDR * PZERO ;4 BYTE BLOCK PTR. -- MOS32 0176 D8D9 00B4 HIADDR * BKADDR +&04 ;Top of data being saved, -- MOS32 0177 D8D9 ;Must be contiguous with BKADDR -- MOS32 0178 D8D9 -- MOS32 0179 D8D9 00B4 BLOKNO * HIADDR -- MOS32 0180 D8D9 00B6 SRCHBK * BLOKNO +&02 ;Block numbers being searched for -- MOS32 0181 D8D9 ;Not used in SAVE, hence can overlap HIADDR -- MOS32 0182 D8D9 -- MOS32 0183 D8D9 00B8 FTPTR * HIADDR +&04 ;Used in VSTRIN -- MOS32 0184 D8D9 00BA ERRSW * FTPTR +&02 ;In p.0 to save space -- MOS32 0185 D8D9 00BB USFLGS * ERRSW +&01 -- MOS32 0186 D8D9 00BC TEMP * USFLGS +&01 -- MOS32 0187 D8D9 00BD IBUF * TEMP +&01 -- MOS32 0188 D8D9 00BE CHKSUM * IBUF +&01 -- MOS32 0189 D8D9 00C0 IFLAG * CHKSUM +&02 -- MOS32 0190 D8D9 00C1 HDRCRC * IFLAG +&01 -- MOS32 0191 D8D9 00C2 ITYPE * HDRCRC +&01 -- MOS32 0192 D8D9 00C3 CURDRV * ITYPE +&01 ;Currently selected cassette -- MOS32 0193 D8D9 00C4 IADDR * CURDRV +&01 -- MOS32 0194 D8D9 00C6 SPEED * IADDR +&02 -- MOS32 0195 D8D9 00C7 GAPTIM * SPEED +&01 -- MOS32 0196 D8D9 00C8 GENPTR * GAPTIM +&01 ;Used in FILEGO/LOAD only -- MOS32 0197 D8D9 00CA TXFLAG * GENPTR +&02 ;"We are transmitting" flag -- MOS32 0198 D8D9 00CB CRCCNT * TXFLAG +&01 ;Used in CRC check -- MOS32 0199 D8D9 00CC FSIZE * CRCCNT + 1 ;File size to modify control block in LOAD -- MOS32 0200 D8D9 -- MOS32 0201 D8D9 00E3 OPTS * CFS1 ;Retained over filing system change -- MOS32 0202 D8D9 ;************************************** -- MOS32 0203 D8D9 -- MOS32 0204 D8D9 00E2 BPAGE0 # &00 -- MOS32 0205 D8D9 -- MOS32 0206 D8D9 -- MOS32 0207 D8D9 -- MOS32 0208 D8D9 IPAGE2 -- MOS32 0209 D8D9 ; page two values -- MOS32 0210 D8D9 ^ &0200 -- MOS32 0211 D8D9 0200 APAGE2 # &00 -- MOS32 0212 D8D9 0200 USRVEC # &02 ;user vector -- MOS32 0213 D8D9 89 = BADFX -- MOS32 0214 D8DA E3 = /(BADFX ) -- MOS32 0215 D8DB 0202 BRKVEC # &02 ;BRK handling -- MOS32 0216 D8DB 71 = DEFBRK -- MOS32 0217 D8DC DB = /(DEFBRK ) -- MOS32 0218 D8DD 0204 IRQALL # &02 ;all IRQs indirect thru here -- MOS32 0219 D8DD 2A = DEFIRQ -- MOS32 0220 D8DE DE = /(DEFIRQ ) -- MOS32 0221 D8DF 0206 IRQVEC # &02 ;unrecognised IRQ -- MOS32 0222 D8DF 3C = IRQTWO -- MOS32 0223 D8E0 DE = /(IRQTWO ) -- MOS32 0224 D8E1 0208 COMVEC # &02 ;command line intepreter -- MOS32 0225 D8E1 DB = CLINT -- MOS32 0226 D8E2 DF = /(CLINT ) -- MOS32 0227 D8E3 020A BYTVEC # &02 ;MOS routine, 0 1 or 2 arguments -- MOS32 0228 D8E3 D7 = BYTE -- MOS32 0229 D8E4 E7 = /(BYTE ) -- MOS32 0230 D8E5 020C WORVEC # &02 ;MOS routine, >2 arguments -- MOS32 0231 D8E5 41 = WORD -- MOS32 0232 D8E6 E8 = /(WORD ) -- MOS32 0233 D8E7 020E WRCVEC # &02 ;write character -- MOS32 0234 D8E7 08 = WRCH -- MOS32 0235 D8E8 E1 = /(WRCH ) -- MOS32 0236 D8E9 0210 RDCVEC # &02 ;read character -- MOS32 0237 D8E9 78 = RDCH -- MOS32 0238 D8EA DE = /(RDCH ) -- MOS32 0239 D8EB CFSTAB -- MOS32 0240 D8EB 0212 FILVEC # &02 ;load/save memory image -- MOS32 0241 D8EB DC = FILEGO -- MOS32 0242 D8EC F1 = /(FILEGO ) -- MOS32 0243 D8ED 0214 ARGVEC # &02 ;read/set file attributes -- MOS32 0244 D8ED 95 = ARGGO -- MOS32 0245 D8EE F1 = /(ARGGO ) -- MOS32 0246 D8EF 0216 BGTVEC # &02 ;get byte from random file MOS32 MOS32 MOS32 MOS32 Acorn macro assembler Page 51 MOS32 MOS32 Initialisation and external interfaces MOS32 -- MOS32 0247 D8EF C9 = GETBYT -- MOS32 0248 D8F0 F4 = /(GETBYT ) -- MOS32 0249 D8F1 0218 BPTVEC # &02 ;put byte to random file -- MOS32 0250 D8F1 2C = PUTBYT -- MOS32 0251 D8F2 F5 = /(PUTBYT ) -- MOS32 0252 D8F3 021A GPBVEC # &02 ;get/put bytes -- MOS32 0253 D8F3 B2 = RTS -- MOS32 0254 D8F4 FF = /(RTS ) -- MOS32 0255 D8F5 021C FNDVEC # &02 ;open/close random file -- MOS32 0256 D8F5 CA = FIND -- MOS32 0257 D8F6 F3 = /(FIND ) -- MOS32 0258 D8F7 021E FSCVEC # &02 ;file system control entry -- MOS32 0259 D8F7 A7 = FSFUNC -- MOS32 0260 D8F8 F1 = /(FSFUNC ) -- MOS32 0261 D8F9 0220 EVTVEC # &02 ;event interrupt -- MOS32 0262 D8F9 B2 = DEFEVT -- MOS32 0263 D8FA FF = /(DEFEVT ) -- MOS32 0264 D8FB 0222 UPTVEC # &02 ;user print routine -- MOS32 0265 D8FB ; default hangs printer -- MOS32 0266 D8FB B2 = DEFUPT -- MOS32 0267 D8FC FF = /(DEFUPT ) -- MOS32 0268 D8FD 0224 NETVEC # &02 ;ECONET effects -- MOS32 0269 D8FD ; default hangs printer -- MOS32 0270 D8FD B2 = DEFNET -- MOS32 0271 D8FE FF = /(DEFNET ) -- MOS32 0272 D8FF 0226 VDUVEC # &02 ;VDU command indirection -- MOS32 0273 D8FF -- MOS32 0274 D8FF B2 = RTS -- MOS32 0275 D900 FF = /(RTS ) -- MOS32 0276 D901 0228 KEYVEC # &02 ;keyboard control indirection -- MOS32 0277 D901 3B = DEFKEY -- MOS32 0278 D902 EF = /(DEFKEY ) -- MOS32 0279 D903 022A INSVEC # &02 ;buffer insert indirection -- MOS32 0280 D903 2B = INS -- MOS32 0281 D904 E5 = /(INS ) -- MOS32 0282 D905 022C REMVEC # &02 ;buffer remove indirection -- MOS32 0283 D905 DC = REM -- MOS32 0284 D906 E4 = /(REM ) -- MOS32 0285 D907 022E CNPVEC # &02 ;buffer count / purge buffer indirection -- MOS32 0286 D907 49 = CNP -- MOS32 0287 D908 E2 = /(CNP ) -- MOS32 0288 D909 0230 INDONE # &02 -- MOS32 0289 D909 B2 = RTS -- MOS32 0290 D90A FF = /(RTS ) -- MOS32 0291 D90B 0232 INDTWO # &02 -- MOS32 0292 D90B B2 = RTS -- MOS32 0293 D90C FF = /(RTS ) -- MOS32 0294 D90D 0234 INDTRH # &02 -- MOS32 0295 D90D B2 = RTS -- MOS32 0296 D90E FF = /(RTS ) -- MOS32 0297 D90F 0036 VLEN * @-APAGE2 -- MOS32 0298 D90F ; -- MOS32 0299 D90F 001B NP2IND * VLEN:SHR: 1 ;number of page 2 indirections -- MOS32 0300 D90F 0051 ROMIVS * NP2IND* 3 ;page ROM indirection vector size -- MOS32 0301 D90F 0D9F ROMVEC * &0DF0-ROMIVS ;paged ROM routine vectors -- MOS32 0302 D90F -- MOS32 0303 D90F -- MOS32 0304 D90F 0236 VARS # &00 -- MOS32 0305 D90F ; -- MOS32 0306 D90F 0236 # &02 ;variables origin -- MOS32 0307 D90F 90 = VBASE ;166 -- MOS32 0308 D910 01 = /(VBASE ) -- MOS32 0309 D911 -- MOS32 0310 D911 0238 # &02 ;origin of 3-byte ROM indirection vectors -- MOS32 0311 D911 9F = ROMVEC ;168 -- MOS32 0312 D912 0D = /(ROMVEC ) -- MOS32 0313 D913 -- MOS32 0314 D913 023A # &02 ;paged ROM info -- MOS32 0315 D913 A1 = ROMS ;170 -- MOS32 0316 D914 02 = /(ROMS ) -- MOS32 0317 D915 -- MOS32 0318 D915 023C # &02 ;keyboard matrix info -- MOS32 0319 D915 5A = KTBL ;172 -- MOS32 0320 D916 F0 = /(KTBL ) -- MOS32 0321 D917 -- MOS32 0322 D917 023E # &02 ;VDU module origin of variables -- MOS32 0323 D917 00 = VARBLE ;174 -- MOS32 0324 D918 03 = /(VARBLE ) -- MOS32 0325 D919 -- MOS32 0326 D919 0240 CYCLE # &01 ;filing system timeout byte -- MOS32 0327 D919 -- MOS32 0328 D919 00 = NULL -- MOS32 0329 D91A -- MOS32 0330 D91A 0241 RDCHSW # &01 ;RDCH source switch (assumed not in page zero, see KTBL) -- MOS32 0331 D91A 00 = ZERO ;177 BRDCH (zero) -- MOS32 0332 D91B -- MOS32 0333 D91B 0242 KSEMA # &01 ;keyboard semaphore -- MOS32 0334 D91B FF = &FF ;178 -- MOS32 0335 D91C -- MOS32 0336 D91C 0243 IHWM # &01 -- MOS32 0337 D91C -- MOS32 0338 D91C 00 = ZERO ;179 -- MOS32 0339 D91D -- MOS32 0340 D91D 0244 HWM # &01 -- MOS32 0341 D91D -- MOS32 0342 D91D 00 = NULL ;180 -- MOS32 0343 D91E -- MOS32 0344 D91E 0245 RS8BIT # &01 -- MOS32 0345 D91E 01 = &01 ;181 1 => 8 bits, 0 => soft key processing -- MOS32 0346 D91F -- MOS32 0347 D91F -- MOS32 0348 D91F 0246 FONTSW # &01 ;current state of font explosion/implosion -- MOS32 0349 D91F -- MOS32 0350 D91F 00 = ZERO ;182 -- MOS32 0351 D920 ; -- MOS32 0352 D920 0247 SROMSW # &01 ;SEROM/cassette switch -- MOS32 0353 D920 -- MOS32 0354 D920 00 = ZERO ;183 cassette by default -- MOS32 0355 D921 -- MOS32 0356 D921 -- MOS32 0357 D921 0248 VPREGA # &01 ;video ULA control register 0 -- MOS32 0358 D921 00 = NULL ;184 -- MOS32 0359 D922 ; -- MOS32 0360 D922 0249 VPREGB # &01 ;video ULA control register 1 -- MOS32 0361 D922 00 = NULL ;185 -- MOS32 0362 D923 -- MOS32 0363 D923 -- MOS32 0364 D923 024A REPROM # &01 ;ROM id after BRK -- MOS32 0365 D923 00 = NULL ;186 -- MOS32 0366 D924 ; -- MOS32 0367 D924 024B BROMID # &01 ;BASIC ROM id MOS32 MOS32 MOS32 MOS32 Acorn macro assembler Page 52 MOS32 MOS32 Initialisation and external interfaces MOS32 -- MOS32 0368 D924 FF = &FF ;187 -- MOS32 0369 D925 -- MOS32 0370 D925 -- MOS32 0371 D925 024C ADCHAN # &01 ;ADC channel number -- MOS32 0372 D925 04 = NADC ;188 -- MOS32 0373 D926 ; -- MOS32 0374 D926 024D MAXADC # &01 ;maximum ADC channel in use -- MOS32 0375 D926 04 = NADC ;189 -- MOS32 0376 D927 ; -- MOS32 0377 D927 024E ADCCNV # &01 -- MOS32 0378 D927 00 = ZERO ;190 ADC conversion type (12 bits) -- MOS32 0379 D928 -- MOS32 0380 D928 -- MOS32 0381 D928 024F RSFLAG # &01 ;RS423 use flag -- MOS32 0382 D928 -- MOS32 0383 D928 ; 1xxx xxxx => dormant -- MOS32 0384 D928 ; 0xxx xxxx => busy -- MOS32 0385 D928 FF = &FF ;191 -- MOS32 0386 D929 ; -- MOS32 0387 D929 0250 RSCTFL # &01 -- MOS32 0388 D929 -- MOS32 0389 D929 56 = RSCDEF ;192 -- MOS32 0390 D92A -- MOS32 0391 D92A -- MOS32 0392 D92A ; -- MOS32 0393 D92A 0251 FLCNT # &01 ;flash period counter -- MOS32 0394 D92A 19 = &19 ;193 1/2 SECOND -- MOS32 0395 D92B ; -- MOS32 0396 D92B 0252 FLASHB # &00 ;used by flash FX calls -- MOS32 0397 D92B 0252 FLSPC # &01 ;flash space period -- MOS32 0398 D92B 19 = &19 ;194 1/2 SECOND -- MOS32 0399 D92C 0253 FLMRK # &01 ;flash mark period -- MOS32 0400 D92C 19 = &19 ;195 1/2 SECOND -- MOS32 0401 D92D ; -- MOS32 0402 D92D -- MOS32 0403 D92D -- MOS32 0404 D92D ;**** FOLLOWING MUST BE CONTIGUOUS (c.f. *FX11 and *FX12) **** -- MOS32 0405 D92D 0254 FARSET # &01 ;first auto-repeat reset -- MOS32 0406 D92D 32 = DAUTOD ;196 -- MOS32 0407 D92E 0255 ARSET # &01 ;reset for above -- MOS32 0408 D92E 08 = DAUTOP ;197 -- MOS32 0409 D92F -- MOS32 0410 D92F -- MOS32 0411 D92F 0256 EXECH # &01 ;*EXEC handle -- MOS32 0412 D92F -- MOS32 0413 D92F 00 = ZERO ;198 -- MOS32 0414 D930 ; -- MOS32 0415 D930 0257 SPOOLH # &01 ;*SPOOL handle -- MOS32 0416 D930 -- MOS32 0417 D930 00 = ZERO ;199 -- MOS32 0418 D931 ; -- MOS32 0419 D931 0258 CRIT # &01 ;critical region indicator -- MOS32 0420 D931 -- MOS32 0421 D931 00 = &00 ;200 not within critical region -- MOS32 0422 D932 ; -- MOS32 0423 D932 0259 NETKDS # &01 ;net keyboard disable -- MOS32 0424 D932 00 = ZERO ;201 default: not disabled -- MOS32 0425 D933 ; -- MOS32 0426 D933 025A KSTAT # &01 ;keyboard status (see MOS56) -- MOS32 0427 D933 20 = SHFTL ;202 -- MOS32 0428 D934 ; -- MOS32 0429 D934 025B RSHLVL # &01 ;RS423 handshake level -- MOS32 0430 D934 09 = RSOVR+&01 ;203 -- MOS32 0431 D935 ; -- MOS32 0432 D935 025C RSSHUT # &01 ;suppress RS423 input -- MOS32 0433 D935 00 = ZERO ;204 default: enable RS423 input -- MOS32 0434 D936 ; -- MOS32 0435 D936 025D RSCASS # &01 ;cassette/RS423 serial processor select -- MOS32 0436 D936 00 = ZERO ;205 $00 => select RS423, $40 => select cassette -- MOS32 0437 D937 ; -- MOS32 0438 D937 025E NETIOC # &01 ;net interception of OS calls -- MOS32 0439 D937 00 = ZERO ;206 default: not intercepted -- MOS32 0440 D938 ; -- MOS32 0441 D938 025F NETRDC # &01 ;net interception of RDCH -- MOS32 0442 D938 00 = ZERO ;207 default: not intercepted -- MOS32 0443 D939 ; -- MOS32 0444 D939 0260 NETWRC # &01 ;net interception of WRCH -- MOS32 0445 D939 00 = ZERO ;208 default: not intercepted -- MOS32 0446 D93A ; -- MOS32 0447 D93A 0261 SHUTSP # &01 ;speech suppressor -- MOS32 0448 D93A 50 = SPOPSP ;209 -- MOS32 0449 D93B ; -- MOS32 0450 D93B 0262 SHUTUP # &01 ;sound suppressor -- MOS32 0451 D93B 00 = ZERO ;210 allow sound by default -- MOS32 0452 D93C ; -- MOS32 0453 D93C 0263 BELLC # &01 ;bell channel -- MOS32 0454 D93C 03 = &03 ;211 -- MOS32 0455 D93D ; -- MOS32 0456 D93D 0264 BELLI # &01 ;bell envelope and chord information -- MOS32 0457 D93D 90 = &90 ;212 -- MOS32 0458 D93E ; -- MOS32 0459 D93E 0265 BELLN # &01 ;bell frequency -- MOS32 0460 D93E 64 = &64 ;213 -- MOS32 0461 D93F ; -- MOS32 0462 D93F 0266 BELLD # &01 ;bell duration -- MOS32 0463 D93F 06 = &06 ;214 -- MOS32 0464 D940 ; -- MOS32 0465 D940 0267 QUIET # &01 -- MOS32 0466 D940 81 = &81 ;215 suppress start-up message / !BOOT option -- MOS32 0467 D941 ; -- MOS32 0468 D941 0268 SOFKL # &01 ;soft key string length -- MOS32 0469 D941 00 = ZERO ;216 -- MOS32 0470 D942 ; -- MOS32 0471 D942 0269 LINES # &01 ;used by VDU software -- MOS32 0472 D942 -- MOS32 0473 D942 00 = ZERO ;217 used by VDU software in page mode -- MOS32 0474 D943 ; -- MOS32 0475 D943 026A QPOSN # &01 ;VDU queue count -- MOS32 0476 D943 -- MOS32 0477 D943 00 = ZERO ;218 -- MOS32 0478 D944 ; -- MOS32 0479 D944 026B TABCOD # &01 ;TAB key code -- MOS32 0480 D944 09 = TAB ;219 -- MOS32 0481 D945 ; -- MOS32 0482 D945 026C INTCH # &01 -- MOS32 0483 D945 1B = ESC ;220 interrupt character (normally ESC) -- MOS32 0484 D946 ; -- MOS32 0485 D946 026D SOFTLO # &00 -- MOS32 0486 D946 ;221 softkey 10 feature -- MOS32 0487 D946 026D EXBREK # &01 -- MOS32 0488 D946 01 = &01 ;expand softkey MOS32 MOS32 MOS32 MOS32 Acorn macro assembler Page 53 MOS32 MOS32 Initialisation and external interfaces MOS32 -- MOS32 0489 D947 ;222 reserved -- MOS32 0490 D947 026E # &01 -- MOS32 0491 D947 D0 = &D0 -- MOS32 0492 D948 ;223 reserved -- MOS32 0493 D948 026F # &01 -- MOS32 0494 D948 E0 = &E0 -- MOS32 0495 D949 ;224 reserved -- MOS32 0496 D949 0270 # &01 -- MOS32 0497 D949 F0 = &F0 -- MOS32 0498 D94A ;225 -- MOS32 0499 D94A ; 0 => enable softkey expansion on fnkey -- MOS32 0500 D94A ; N => return code N+i for fnkey(i), i=0..9 -- MOS32 0501 D94A 0271 # &01 -- MOS32 0502 D94A 01 = &01 ;return soft strings by default -- MOS32 0503 D94B ;226 -- MOS32 0504 D94B ; 0 => enable softkey expansion on SHIFT/fnkey -- MOS32 0505 D94B ; N => return code N+i for SHIFT/fnkey(i), i=0..9 -- MOS32 0506 D94B 0272 # &01 -- MOS32 0507 D94B 80 = &80 ;return codes $80..$89 by default (user definable characters) -- MOS32 0508 D94C ;227 -- MOS32 0509 D94C ; 0 => enable softkey expansion on CTRL/fnkey -- MOS32 0510 D94C ; N => return code N+i for CTRL/fnkey(i), i=0..9 -- MOS32 0511 D94C 0273 # &01 -- MOS32 0512 D94C 90 = &90 ;return codes $90..$99 by default (user definable characters) -- MOS32 0513 D94D ;228 -- MOS32 0514 D94D ; 0 => enable softkey expansion on SHIFT/CTRL/fnkey -- MOS32 0515 D94D ; N => return code N+i for SHIFT/CTRL/fnkey(i), i=0..9 -- MOS32 0516 D94D 0274 # &01 -- MOS32 0517 D94D 00 = ZERO ;ingnore key combination by default -- MOS32 0518 D94E -- MOS32 0519 D94E 0275 ESCHAR # &01 ;make INTERRUPT CHARACTER return normal value -- MOS32 0520 D94E 00 = ZERO ;229 <>0 => return normal value -- MOS32 0521 D94F -- MOS32 0522 D94F 0276 EAOPT # &01 ;suppress normal escape acknowledge actions -- MOS32 0523 D94F 00 = ZERO ;230 suppress if <> 0 -- MOS32 0524 D950 -- MOS32 0525 D950 0277 B6522 # &01 ;$00 => no, $FF => second 6522 present -- MOS32 0526 D950 FFBYT -- MOS32 0527 D950 FF = &FF ;231 assume 6522B present -- MOS32 0528 D951 -- MOS32 0529 D951 0278 C6850 # &01 ;$00 => no, $FF => 6850 present -- MOS32 0530 D951 FF = &FF ;232 assume 6850 present -- MOS32 0531 D952 -- MOS32 0532 D952 0279 A6522 # &01 ;$00 => no, $FF => primary 6522 present -- MOS32 0533 D952 FF = &FF ;233 assume 6522A present -- MOS32 0534 D953 -- MOS32 0535 D953 027A TUBEM # &01 ;$FF if tube present -- MOS32 0536 D953 027A TUBE * TUBEM -- MOS32 0537 D953 00 = ZERO ;234 assume tube not present -- MOS32 0538 D954 -- MOS32 0539 D954 027B SPFLAG # &01 ;$FF if speech chip present -- MOS32 0540 D954 00 = ZERO ;235 -- MOS32 0541 D955 -- MOS32 0542 D955 027C WRCHSW # &01 ;OSWRCH destinations flag -- MOS32 0543 D955 0001 WRRS * &01 ;WRCH is RS423 -- MOS32 0544 D955 0002 WRVDU * &02 ;WRCH is ***NOT*** VDU -- MOS32 0545 D955 0004 WRPREN * &04 ;0 => ENABLE PRINT -- MOS32 0546 D955 0008 WRPRNT * &08 ;WRCH is ***NOT*** print -- MOS32 0547 D955 0010 WRSPL * &10 ;WRCH is ***NOT*** spool -- MOS32 0548 D955 0040 WRVDU1 * &40 ;WRCH to printer only by VDU1 -- MOS32 0549 D955 00 = ZERO ;236 WRCH is VDU/print/spool -- MOS32 0550 D956 ; ******** DO NOT ALTER ******** -- MOS32 0551 D956 -- MOS32 0552 D956 027D CURSED # &01 -- MOS32 0553 D956 00 = ZERO ;237 -- MOS32 0554 D957 -- MOS32 0555 D957 007E MPAGE2 * @-APAGE2 -- MOS32 0556 D957 -- MOS32 0557 D957 027E SPARE8 # &03 -- MOS32 0558 D957 00 = ZERO -- MOS32 0559 D958 00 = ZERO -- MOS32 0560 D959 00 = ZERO -- MOS32 0561 D95A ; 238, 239, 240 -- MOS32 0562 D95A -- MOS32 0563 D95A 0281 UFX1 # &01 ;FX 1 value -- MOS32 0564 D95A 00 = ZERO ;241 -- MOS32 0565 D95B ; ******** DO NOT ALTER ******** -- MOS32 0566 D95B -- MOS32 0567 D95B 0282 SPREGA # &01 ;serial processor register contents -- MOS32 0568 D95B -- MOS32 0569 D95B 64 = B9600 ;242 -- MOS32 0570 D95C -- MOS32 0571 D95C 0283 TIMESW # &01 ;TIME pointer, either 5 or 10 -- MOS32 0572 D95C 05 = &05 ;243 -- MOS32 0573 D95D -- MOS32 0574 D95D 0284 USKFLG # &01 ;soft key consistency flag -- MOS32 0575 D95D FF = &FF ;244 =0 => soft keys consistent -- MOS32 0576 D95E -- MOS32 0577 D95E 0285 PRNTSW # &01 ;PRINT destination flag -- MOS32 0578 D95E 0001 PCEN * &01 ;print is (C)ENTRONICS -- MOS32 0579 D95E 0002 PRS * &02 ;print is (RS)232 -- MOS32 0580 D95E 0003 PUSE * &03 ;print is (user) routine -- MOS32 0581 D95E 0004 PNET * &04 ;print is ECO(NET) -- MOS32 0582 D95E 01 = PCEN ;245 -- MOS32 0583 D95F ; ******** DO NOT ALTER ******** -- MOS32 0584 D95F -- MOS32 0585 D95F 0286 PIGNOR # &01 ;printer ignore character -- MOS32 0586 D95F 0A = MLF ;246 support auto-linefeed printers by default -- MOS32 0587 D960 ; ******** DO NOT ALTER ******** -- MOS32 0588 D960 -- MOS32 0589 D960 0087 PPAGE2 * @-APAGE2 -- MOS32 0590 D960 -- MOS32 0591 D960 0287 BREAKI # &03 ;used for interception of BREAK -- MOS32 0592 D960 00 = ZERO ;247 change to $4C to intercept BREAK -- MOS32 0593 D961 00 = ZERO ;248 -- MOS32 0594 D962 00 = ZERO ;249 -- MOS32 0595 D963 -- MOS32 0596 D963 028A SPARE9 # &02 ;spare -- MOS32 0597 D963 00 = ZERO ;250 -- MOS32 0598 D964 00 = ZERO ;251 -- MOS32 0599 D965 -- MOS32 0600 D965 028C LROMID # &01 ;current language ROM id -- MOS32 0601 D965 FF = &FF ;252 -- MOS32 0602 D966 -- MOS32 0603 D966 008D NPAGE2 * @-APAGE2 -- MOS32 0604 D966 -- MOS32 0605 D966 028D TYPE # &01 ;restart type -- MOS32 0606 D966 ;= ZERO ;253 -- MOS32 0607 D966 -- MOS32 0608 D966 028E MODELB # &01 -- MOS32 0609 D966 028E MODEL * MODELB MOS32 MOS32 MOS32 MOS32 Acorn macro assembler Page 54 MOS32 MOS32 Initialisation and external interfaces MOS32 -- MOS32 0610 D966 ;= ZERO ;254 -- MOS32 0611 D966 -- MOS32 0612 D966 028F OPTION # &01 ;start up options -- MOS32 0613 D966 ;= ZERO ;255 -- MOS32 0614 D966 -- MOS32 0615 D966 0190 VBASE * @-&100 -- MOS32 0616 D966 00A6 VORG * VARS-VBASE -- MOS32 0617 D966 [ VARS-VBASE- 166=0 -- MOS32 0618 D966 | -- MOS32 0620 D966 ] -- MOS32 0621 D966 ; -- MOS32 0622 D966 -- MOS32 0623 D966 0290 DPAGE2 # &00 -- MOS32 0624 D966 -- MOS32 0625 D966 0290 VERTIC # &01 ;VDU vertical adjust -- MOS32 0626 D966 -- MOS32 0627 D966 ;= ZERO -- MOS32 0628 D966 -- MOS32 0629 D966 0291 INTERL # &01 ;interlace invert -- MOS32 0630 D966 -- MOS32 0631 D966 ;= ZERO -- MOS32 0632 D966 -- MOS32 0633 D966 ; time -- MOS32 0634 D966 0292 TIME1 # &05 ;first absolute time counter -- MOS32 0635 D966 0292 TIME * TIME1 -- MOS32 0636 D966 ;= ZERO -- MOS32 0637 D966 ;= ZERO -- MOS32 0638 D966 ;= ZERO -- MOS32 0639 D966 ;= ZERO -- MOS32 0640 D966 ;= ZERO -- MOS32 0641 D966 0297 TIME2 # &05 ;second absolute time counter -- MOS32 0642 D966 ;= ZERO -- MOS32 0643 D966 ;= ZERO -- MOS32 0644 D966 ;= ZERO -- MOS32 0645 D966 ;= ZERO -- MOS32 0646 D966 ;= ZERO -- MOS32 0647 D966 ; N.B. soft restart zeroes from here onwards -- MOS32 0648 D966 029C STPW # &05 ;stopwatch counter -- MOS32 0649 D966 029C CPAGE2 * STPW -- MOS32 0650 D966 ;= ZERO -- MOS32 0651 D966 ;= ZERO -- MOS32 0652 D966 ;= ZERO -- MOS32 0653 D966 ;= ZERO -- MOS32 0654 D966 ;= ZERO -- MOS32 0655 D966 -- MOS32 0656 D966 02A1 ROMS # NROM -- MOS32 0657 D966 -- MOS32 0658 D966 ;= ZERO (NROM times) -- MOS32 0659 D966 -- MOS32 0660 D966 ; work slots used by CLI -- MOS32 0661 D966 02B1 RDCTLO # &01 ;INKEY wait counter 1 -- MOS32 0662 D966 ;= ZERO -- MOS32 0663 D966 02B2 RDCTHI # &01 ;INKEY wait counter 2 -- MOS32 0664 D966 ;= ZERO -- MOS32 0665 D966 -- MOS32 0666 D966 ; work slots used by RDLN -- MOS32 0667 D966 ; values must not be altered by any sei-routine -- MOS32 0668 D966 02B3 RDLNN # &01 -- MOS32 0669 D966 ;= NULL -- MOS32 0670 D966 02B4 RDLNLC # &01 -- MOS32 0671 D966 ;= NULL -- MOS32 0672 D966 02B5 RDLNHC # &01 -- MOS32 0673 D966 ;= NULL -- MOS32 0674 D966 -- MOS32 0675 D966 ; ADC control -- MOS32 0676 D966 ; may not be shared -- MOS32 0677 D966 02B6 ADCLOV # NADC ;ADC lo byte values (0 to 3) -- MOS32 0678 D966 ;= ZERO -- MOS32 0679 D966 ;= ZERO -- MOS32 0680 D966 ;= ZERO -- MOS32 0681 D966 ;= ZERO -- MOS32 0682 D966 02BA ADCHIV # NADC ;ADC hi byte values (0 to 3) -- MOS32 0683 D966 ;= ZERO -- MOS32 0684 D966 ;= ZERO -- MOS32 0685 D966 ;= ZERO -- MOS32 0686 D966 ;= ZERO -- MOS32 0687 D966 02BE ADCFLG # &01 -- MOS32 0688 D966 ;= ZERO -- MOS32 0689 D966 -- MOS32 0690 D966 ; event interrupt vectors -- MOS32 0691 D966 000A NEVENT * &000A ;total number of events -- MOS32 0692 D966 02BF EVENTS # NEVENT ;event flags -- MOS32 0693 D966 0000 EVMPTY * &00 ;output buffer empty -- MOS32 0694 D966 ;= ZERO -- MOS32 0695 D966 0001 EVFULL * &01 ;input buffer full -- MOS32 0696 D966 ;= ZERO -- MOS32 0697 D966 0002 EVKYBD * &02 ;keyboard interrupt -- MOS32 0698 D966 ;= ZERO -- MOS32 0699 D966 0003 EVADC * &03 ;ADC conversion complete -- MOS32 0700 D966 ;= ZERO -- MOS32 0701 D966 0004 EVVSYN * &04 ;VSYNC -- MOS32 0702 D966 ;= ZERO -- MOS32 0703 D966 0005 EVSWCH * &05 ;(timer) stopwatch -- MOS32 0704 D966 ;= ZERO -- MOS32 0705 D966 0006 EVESC * &06 ;escape detected -- MOS32 0706 D966 ;= ZERO -- MOS32 0707 D966 0007 EVRS * &07 ;RS423 Rx error -- MOS32 0708 D966 ;= ZERO -- MOS32 0709 D966 0008 EVUSER * &08 ;user allocated event -- MOS32 0710 D966 ;= ZERO -- MOS32 0711 D966 -- MOS32 0712 D966 ; miscellaneous -- MOS32 0713 D966 02C9 SOFKP # &01 ;pointer to soft key string -- MOS32 0714 D966 ;= NULL -- MOS32 0715 D966 ; -- MOS32 0716 D966 02CA FARCTR # &01 ;first auto-repeat count -- MOS32 0717 D966 ;= NULL -- MOS32 0718 D966 -- MOS32 0719 D966 02CB KSCSTA # &03 ;keyboard scan start address work vector -- MOS32 0720 D966 ;= NULL -- MOS32 0721 D966 -- MOS32 0722 D966 ; values to be initialised to $FF -- MOS32 0723 D966 02CE FFBYTE # &00 -- MOS32 0724 D966 ; -- MOS32 0725 D966 02CE SSEMA # &01 ;sound semaphore -- MOS32 0726 D966 ; -- MOS32 0727 D966 ; buffer activity flags -- MOS32 0728 D966 02CF BACTIV # &00 -- MOS32 0729 D966 02CF DUMMY # 3 ;Not used - necessary for padding (see PURGE) -- MOS32 0730 D966 02D2 PFLAG # &01 ;print flag -- MOS32 0731 D966 ; 1xxx xxxx => dormant MOS32 MOS32 MOS32 MOS32 Acorn macro assembler Page 55 MOS32 MOS32 Initialisation and external interfaces MOS32 -- MOS32 0732 D966 ; 0xxx xxxx => busy -- MOS32 0733 D966 02D3 SFLUSH # &04 ;sound flush flags -- MOS32 0734 D966 02D7 SPSTAT # &01 ;speech processor status -- MOS32 0735 D966 ; -- MOS32 0736 D966 ; buffer control -- MOS32 0737 D966 ; buffer start page offsets -- MOS32 0738 D966 02D8 BFSTRT # BUPB+&01 -- MOS32 0739 D966 ; buffer end page offsets -- MOS32 0740 D966 02E1 BFEND # BUPB+&01 -- MOS32 0741 D966 ; -- MOS32 0742 D966 02EA CFSA # &03 -- MOS32 0743 D966 -- MOS32 0744 D966 ; -- MOS32 0745 D966 02ED CFSD # &01 -- MOS32 0746 D966 -- MOS32 0747 D966 02EE FBLOCK # &12 ;load/save control block -- MOS32 0748 D966 0000 FSTR * &0000 ;pointer to filename (2 bytes) -- MOS32 0749 D966 0002 FLOAD * &0002 ;load address (4 bytes) -- MOS32 0750 D966 0006 FEXEC * &0006 ;execute address (4 bytes) -- MOS32 0751 D966 000A FFROM * &000A ;from address (4 bytes) -- MOS32 0752 D966 000E FTO * &000E ;to address (4 bytes) -- MOS32 0753 D966 ;= 18*NULL -- MOS32 0754 D966 -- MOS32 0755 D966 0300 ZPAGE2 # &00 -- MOS32 0756 D966 -- MOS32 0757 D966 LNK MOS34 -- MOS34 0001 D966 -- MOS34 0002 D966 ; MOS34 -- MOS34 0003 D966 TTL MOS34 Initialisation -- MOS34 0004 D966 OPT MOS34 MOS34 MOS34 MOS34 MOS34 Acorn macro assembler Page 56 MOS34 MOS34 Initialisation MOS34 -- MOS34 0005 D966 -- MOS34 0006 D966 ;(c) 1981 ACORN Computers Limited -- MOS34 0007 D966 ;BBC Microcomputer MOS -- MOS34 0008 D966 -- MOS34 0009 D966 ;Change record: -- MOS34 0010 D966 ;100 15-Apr-82 PB Use PCEN=1 -- MOS34 0011 D966 ;039 15-Aug-81 PB Start of change to PROTON interface -- MOS34 0012 D966 ;004 29-Jul-81 MP Prototype version -- MOS34 0013 D966 -- MOS34 0014 D966 ;Author(s): -- MOS34 0015 D966 ;PB Paul Bond -- MOS34 0016 D966 ;MP Mike Prees -- MOS34 0017 D966 TTL Entry point after hardware break/reset -- MOS34 0018 D966 OPT OPNEWP MOS34 MOS34 MOS34 MOS34 Acorn macro assembler Page 57 MOS34 Entry point after hardware break/reset MOS34 -- MOS34 0019 D966 -- MOS34 0020 D966 -- MOS34 0021 D966 MRESET ;entered here after reset -- MOS34 0022 D966 -- MOS34 0023 D966 ; ensure NMIs are ignored as sson as possible -- MOS34 0024 D966 ; -- MOS34 0025 D966 A9 40 LDAIM &40 ;A := RTI opcode -- MOS34 0026 D968 8D 00 0D STA NMI -- MOS34 0027 D96B -- MOS34 0028 D96B ; ensure interrupts disabled (useful for JMP -4 freaks) -- MOS34 0029 D96B ; -- MOS34 0030 D96B 78 SEI -- MOS34 0031 D96C -- MOS34 0032 D96C ; clear decimal mode -- MOS34 0033 D96C ; -- MOS34 0034 D96C D8 CLD -- MOS34 0035 D96D -- MOS34 0036 D96D ; reset stack -- MOS34 0037 D96D ; -- MOS34 0038 D96D A2 FF LDXIM &FF -- MOS34 0039 D96F 9A TXS -- MOS34 0040 D970 -- MOS34 0041 D970 ; push hard reset status -- MOS34 0042 D970 ; -- MOS34 0043 D970 AD 4E FE LDA IERQ -- MOS34 0044 D973 0A ASLA -- MOS34 0045 D974 48 PHA ;A=0 => hard, A<>0 => soft -- MOS34 0046 D975 F0 09 BEQ HRDRST ;[hard reset, A=0] MOS34 0046 D975 v76 MOS34 0047 D977 ; MOS34 0046 D975 v76 MOS34 0048 D977 ; prepare for possible soft reset MOS34 0046 D975 v76 MOS34 0049 D977 ; MOS34 0046 D975 v76 MOS34 0050 D977 ; check for critical region MOS34 0046 D975 v76 MOS34 0051 D977 ; MOS34 0046 D975 v76 MOS34 0052 D977 AD 58 02 LDA CRIT MOS34 0046 D975 v76 MOS34 0053 D97A 4A LSRA MOS34 0046 D975 v76 MOS34 0054 D97B C9 01 CMPIM &01 MOS34 0046 D975 v76 MOS34 0055 D97D D0 38 BNE SFTRST ;[not within a critical region] MOS34 0055 D97D v47 MOS34 0056 D97F ; A=1 MOS34 0055 D97D v47 MOS34 0057 D97F 4A LSRA MOS34 0055 D97D v47 MOS34 0058 D980 ; A=0 MOS34 0055 D97D v47 MOS34 0059 D980 ; MOS34 0055 D97D v47 MOS34 0060 D980 ; within a critical region - clear store MOS34 0055 D97D v47 MOS34 0061 D980 ; MOS34 0055 D97D v47 MOS34 0062 D980 HRDRST ;hard reset MOS34 0055 D97D v47 MOS34 0063 D980 ; A=0 MOS34 0055 D97D v47 MOS34 0064 D980 ; hard reset MOS34 0055 D97D v47 MOS34 0065 D980 ; clear store MOS34 0055 D97D v47 MOS34 0066 D980 [ MOS125 = &FF MOS34 0055 D97D v47 MOS34 0092 D980 ] MOS34 0055 D97D v47 MOS34 0093 D980 MOS34 0055 D97D v47 MOS34 0094 D980 [ MOS125 = &7F MOS34 0055 D97D v47 MOS34 0095 D980 A2 04 LDXIM &04 ;start clearing at page 4 MOS34 0055 D97D v47 MOS34 0096 D982 A8 TAY ;Y := 0 MOS34 0055 D97D v47 MOS34 0097 D983 85 00 STA &0000 MOS34 0055 D97D v47 MOS34 0098 D985 CLRPG MOS34 0055 D97D v47 MOS34 0099 D985 86 01 STX &0001 MOS34 0055 D97D v47 MOS34 0100 D987 C8 INY MOS34 0055 D97D v47 MOS34 0101 D988 91 00 STAIY &0000 ;saves 163 ms MOS34 0055 D97D v47 MOS34 0102 D98A E4 01 CPX &0001 MOS34 0055 D97D v47 MOS34 0103 D98C D0 23 BNE CLEAR0 ;[16K RAM] MOS34 0055 D97D v47 MOS34 0104 D98E E8 INX MOS34 0055 D97D v47 MOS34 0105 D98F E0 0D CPXIM /(NMI ) MOS34 0055 D97D v47 MOS34 0106 D991 85 F2 STA WORK MOS34 0055 D97D v47 MOS34 0107 D993 86 F3 STX WORK+1 MOS34 0055 D97D v47 MOS34 0108 D995 F0 06 BEQ CLEARA ;leave RTI in place MOS34 0055 D97D v47 MOS34 0109 D997 88 DEY ;otherwise Y=0 MOS34 0055 D97D v47 MOS34 0110 D998 MOS34 0055 D97D v47 MOS34 0111 D998 ; clear store to $00 (no blobs on screen) MOS34 0055 D97D v47 MOS34 0112 D998 ; done: 0000 even . 0 . . MOS34 0055 D97D v47 MOS34 0113 D998 ; X WORK odd x . . . MOS34 0055 D97D v47 MOS34 0114 D998 ; Y MOS34 0055 D97D v47 MOS34 0115 D998 CLEAR MOS34 0055 D97D v47 MOS34 0116 D998 91 F2 STAIY WORK ;saves 4 ms MOS34 0055 D97D v47 MOS34 0117 D99A C8 INY ;1 MOS34 0055 D97D v47 MOS34 0118 D99B 91 00 STAIY &0000 MOS34 0055 D97D v47 MOS34 0119 D99D CLEARA MOS34 0055 D97D v47 MOS34 0120 D99D 91 F2 STAIY WORK ;saves 4 ms MOS34 0055 D97D v47 MOS34 0121 D99F C8 INY ;2 MOS34 0055 D97D v47 MOS34 0122 D9A0 91 00 STAIY &0000 ;saves 24 ms MOS34 0055 D97D v47 MOS34 0123 D9A2 91 F2 STAIY WORK ;saves 4 ms MOS34 0055 D97D v47 MOS34 0124 D9A4 C8 INY ;3 MOS34 0055 D97D v47 MOS34 0125 D9A5 91 00 STAIY &0000 ;saves 8 ms MOS34 0055 D97D v47 MOS34 0126 D9A7 91 F2 STAIY WORK ;saves 4 ms MOS34 0055 D97D v47 MOS34 0127 D9A9 C8 INY ;0 MOS34 0055 D97D v47 MOS34 0128 D9AA 91 00 STAIY &0000 ;saves 4 ms MOS34 0055 D97D v47 MOS34 0129 D9AC D0 EA BNE CLEAR MOS34 0055 D97D v47 MOS34 0130 D9AE E8 INX MOS34 0055 D97D v47 MOS34 0131 D9AF 10 D4 BPL CLRPG MOS34 0055 D97D v47 MOS34 0132 D9B1 ; 32K RAM MOS34 0055 D97D v47 MOS34 0133 D9B1 ; MOS34 0055 D97D v47 MOS34 0134 D9B1 CLEAR0 MOS34 0055 D97D v47 MOS34 0135 D9B1 ; $0001 = $80 (model B) or $40 (model A) MOS34 0055 D97D v47 MOS34 0136 D9B1 8E 8E 02 STX MODELB MOS34 0055 D97D v47 MOS34 0137 D9B4 ; MOS34 0055 D97D v47 MOS34 0138 D9B4 ; force soft keys reset MOS34 0055 D97D v47 MOS34 0139 D9B4 8E 84 02 STX USKFLG ;USKFLG := non-zero MOS34 0055 D97D v47 MOS34 0140 D9B7 ] MOS34 0055 D97D v47 MOS34 0141 D9B7 MOS34 0055 D97D v47 MOS34 0142 D9B7 [ MOS125 = &00 MOS34 0055 D97D v47 MOS34 0169 D9B7 ] MOS34 0055 D97D v47 MOS34 0170 D9B7 MOS34 0055 D97D v47 MOS34 0171 D9B7 ; MOS34 0055 D97D v47 MOS34 0172 D9B7 SFTRST MOS34 0055 D97D v47 MOS34 0173 D9B7 ; MOS34 0055 D97D v47 MOS34 0174 D9B7 ; initialise addressable latch outputs hi MOS34 0055 D97D v47 MOS34 0175 D9B7 ; MOS34 0055 D97D v47 MOS34 0176 D9B7 A2 0F LDXIM &0F ;for latch driving -- MOS34 0177 D9B9 8E 42 FE STX DDRBQ ;set PB3-PB0 as outputs to drive addressable latch -- MOS34 0178 D9BC ; -- MOS34 0179 D9BC IALTCH -- MOS34 0180 D9BC CA DEX MOS34 0183 D9C2 ^78 MOS34 0181 D9BD 8E 40 FE STX PBQ ;first store value = $0E, last store value = $08 MOS34 0183 D9C2 ^78 MOS34 0182 D9C0 E0 09 CPXIM &09 MOS34 0183 D9C2 ^78 MOS34 0183 D9C2 B0 F8 BCS IALTCH -- MOS34 0184 D9C4 ; fall thru when X=$08 -- MOS34 0185 D9C4 -- MOS34 0186 D9C4 -- MOS34 0187 D9C4 ; check for hard restart -- MOS34 0188 D9C4 ; -- MOS34 0189 D9C4 ; read start-up options -- MOS34 0190 D9C4 ; MOS34 MOS34 MOS34 MOS34 Acorn macro assembler Page 58 MOS34 Entry point after hardware break/reset MOS34 -- MOS34 0191 D9C4 E8 INX ;X := $09, scan down from last start-up option -- MOS34 0192 D9C5 ; -- MOS34 0193 D9C5 RDOPT1 -- MOS34 0194 D9C5 8A TXA ;save X in A MOS34 0203 D9CF ^74 MOS34 0195 D9C6 20 59 F0 JSR KC ;read state of matrix element addressed by X (A maintained) MOS34 0203 D9CF ^74 MOS34 0196 D9C9 ; MOS34 0203 D9CF ^74 MOS34 0197 D9C9 ; N.B. does not corrupt A MOS34 0203 D9CF ^74 MOS34 0198 D9C9 ; MOS34 0203 D9CF ^74 MOS34 0199 D9C9 E0 80 CPXIM &80 ;C=0 => option open, C=1 => option closed MOS34 0203 D9CF ^74 MOS34 0200 D9CB 66 FC ROR TEMPA ;rotate state of start-up option into TEMPA byte MOS34 0203 D9CF ^74 MOS34 0201 D9CD AA TAX ;restore X MOS34 0203 D9CF ^74 MOS34 0202 D9CE CA DEX MOS34 0203 D9CF ^74 MOS34 0203 D9CF D0 F4 BNE RDOPT1 ;execute loop 9 times -- MOS34 0204 D9D1 ; -- MOS34 0205 D9D1 ; N.B. exits with X=0, SHIFT key has not been scanned -- MOS34 0206 D9D1 ; state of CTRL key has been rotated into TEMPA -- MOS34 0207 D9D1 ; -- MOS34 0208 D9D1 8E 8D 02 STX TYPE ;restart type := 0 -- MOS34 0209 D9D4 26 FC ROL TEMPA ;C = state of CTRL key, TEMPA = start-up options -- MOS34 0210 D9D6 20 24 EF JSR KBDIS ;disable keyboard (and resume hardware scan) -- MOS34 0211 D9D9 ; -- MOS34 0212 D9D9 6A RORA ;C=1 => CTRL pressed (KBDIS does PHP ... PLA) -- MOS34 0213 D9DA ; -- MOS34 0214 D9DA A2 9C LDXIM CPAGE2 ;(do not set to reset timer if soft restart) -- MOS34 0215 D9DC A0 8D LDYIM NPAGE2 ;reset BREAKI if power up -- MOS34 0216 D9DE 68 PLA ;pull hard restart status -- MOS34 0217 D9DF F0 09 BEQ POWER ;[power up] MOS34 0217 D9DF v76 MOS34 0218 D9E1 ; MOS34 0217 D9DF v76 MOS34 0219 D9E1 A0 7E LDYIM MPAGE2 ;prepare for BREAK MOS34 0217 D9DF v76 MOS34 0220 D9E3 90 11 BCC SOFT ;[CTRL not pressed - force soft reset, b1b0(TYPE) := 0] MOS34 0220 D9E3 v6E MOS34 0221 D9E5 ; MOS34 0220 D9E3 v6E MOS34 0222 D9E5 ; b1b0(TYPE) := 2 MOS34 0220 D9E3 v6E MOS34 0223 D9E5 ; MOS34 0220 D9E3 v6E MOS34 0224 D9E5 A0 87 LDYIM PPAGE2 ;CTRL/BREAK MOS34 0220 D9E3 v6E MOS34 0225 D9E7 EE 8D 02 INC TYPE MOS34 0220 D9E3 v6E MOS34 0226 D9EA ; MOS34 0220 D9E3 v6E MOS34 0227 D9EA POWER ;power up, b1b0(TYPE) := 1 MOS34 0220 D9E3 v6E MOS34 0228 D9EA ;HARD ;hard restart MOS34 0220 D9E3 v6E MOS34 0229 D9EA EE 8D 02 INC TYPE MOS34 0220 D9E3 v6E MOS34 0230 D9ED ; MOS34 0220 D9E3 v6E MOS34 0231 D9ED ; initialise OPTION MOS34 0220 D9E3 v6E MOS34 0232 D9ED ; MOS34 0220 D9E3 v6E MOS34 0233 D9ED A5 FC LDA TEMPA MOS34 0220 D9E3 v6E MOS34 0234 D9EF 49 FF EORIM &FF ;invert VDU mode selection MOS34 0220 D9E3 v6E MOS34 0235 D9F1 8D 8F 02 STA OPTION MOS34 0220 D9E3 v6E MOS34 0236 D9F4 ; MOS34 0220 D9E3 v6E MOS34 0237 D9F4 A2 90 LDXIM DPAGE2 ;set to reset timer MOS34 0220 D9E3 v6E MOS34 0238 D9F6 MOS34 0220 D9E3 v6E MOS34 0239 D9F6 MOS34 0220 D9E3 v6E MOS34 0240 D9F6 SOFT MOS34 0220 D9E3 v6E MOS34 0241 D9F6 ; initialise other page two locations to zero/$FF MOS34 0220 D9E3 v6E MOS34 0242 D9F6 ; N.B. X has been set to an appropriate value MOS34 0220 D9E3 v6E MOS34 0243 D9F6 A9 00 LDAIM ZERO -- MOS34 0244 D9F8 IP0SX -- MOS34 0245 D9F8 E0 CE CPXIM FFBYTE MOS34 0258 DA07 ^6F MOS34 0246 D9FA [ MOS125 = &FF MOS34 0258 DA07 ^6F MOS34 0249 D9FA | MOS34 0258 DA07 ^6F MOS34 0250 D9FA D0 07 BNE Z0BYTE MOS34 0258 DA07 ^6F MOS34 0251 D9FC A9 FF LDAIM &FF MOS34 0258 DA07 ^6F MOS34 0252 D9FE 8D CE 02 STA SSEMA MOS34 0258 DA07 ^6F MOS34 0253 DA01 A2 D2 LDXIM PFLAG MOS34 0258 DA07 ^6F MOS34 0254 DA03 ] MOS34 0258 DA07 ^6F MOS34 0255 DA03 Z0BYTE MOS34 0258 DA07 ^6F MOS34 0256 DA03 9D 00 02 STAAX &0200 MOS34 0258 DA07 ^6F MOS34 0257 DA06 E8 INX MOS34 0258 DA07 ^6F MOS34 0258 DA07 D0 EF BNE IP0SX -- MOS34 0259 DA09 ; N.B. A=$FF, X=0 -- MOS34 0260 DA09 8D 63 FE STA DDRAR ;set all outputs on printer data direction register (6522B) -- MOS34 0261 DA0C -- MOS34 0262 DA0C -- MOS34 0263 DA0C ; initialise page zero locations to zero -- MOS34 0264 DA0C ; -- MOS34 0265 DA0C 8A TXA ;A := 0 -- MOS34 0266 DA0D A2 E2 LDXIM BPAGE0 -- MOS34 0267 DA0F IP0SW -- MOS34 0268 DA0F 95 00 STAAX ZERO MOS34 0270 DA12 ^7B MOS34 0269 DA11 E8 INX MOS34 0270 DA12 ^7B MOS34 0270 DA12 D0 FB BNE IP0SW -- MOS34 0271 DA14 ; X=0 -- MOS34 0272 DA14 -- MOS34 0273 DA14 -- MOS34 0274 DA14 ; initialise page two specific values -- MOS34 0275 DA14 ; -- MOS34 0276 DA14 IP2SV -- MOS34 0277 DA14 B9 D8 D8 LDAAY IPAGE2 -&01 MOS34 0280 DA1B ^77 MOS34 0278 DA17 99 FF 01 STAAY APAGE2 -&01 MOS34 0280 DA1B ^77 MOS34 0279 DA1A 88 DEY MOS34 0280 DA1B ^77 MOS34 0280 DA1B D0 F7 BNE IP2SV -- MOS34 0281 DA1D ; Y=0 -- MOS34 0282 DA1D -- MOS34 0283 DA1D -- MOS34 0284 DA1D ; make old key space in case CFS auto-boot selected -- MOS34 0285 DA1D ; -- MOS34 0286 DA1D A9 62 LDAIM &62 -- MOS34 0287 DA1F 85 ED STA OKEY -- MOS34 0288 DA21 ; X=0, Y=0 -- MOS34 0289 DA21 -- MOS34 0290 DA21 -- MOS34 0291 DA21 ; setup MC6850 -- MOS34 0292 DA21 ; -- MOS34 0293 DA21 20 FF FA JSR MC6850 ;N.B. does not corrupt X or Y -- MOS34 0294 DA24 ; X=0, Y=0 -- MOS34 0295 DA24 -- MOS34 0296 DA24 -- MOS34 0297 DA24 ; clear any 6522 interrupt status -- MOS34 0298 DA24 ; -- MOS34 0299 DA24 A9 7F LDAIM &7F -- MOS34 0300 DA26 E8 INX ;X=1 -- MOS34 0301 DA27 IFRIER ;X=1 initialises IERQ&IERR, X=0 initialises IFRQ&IFRR -- MOS34 0302 DA27 9D 4D FE STAAX IFRQ MOS34 0305 DA2E ^77 MOS34 0303 DA2A 9D 6D FE STAAX IFRR MOS34 0305 DA2E ^77 MOS34 0304 DA2D CA DEX MOS34 0305 DA2E ^77 MOS34 0305 DA2E 10 F7 BPL IFRIER ;[execute loop once more with X=0] -- MOS34 0306 DA30 ; X=$FF -- MOS34 0307 DA30 ; -- MOS34 0308 DA30 [ FALSE=0 -- MOS34 0311 DA30 ] -- MOS34 0312 DA30 -- MOS34 0313 DA30 ; TEMPA is now 0 -- MOS34 0314 DA30 ; if an interrupt occurs it will adopt the value $7F -- MOS34 0315 DA30 ; MOS34 MOS34 MOS34 MOS34 Acorn macro assembler Page 59 MOS34 Entry point after hardware break/reset MOS34 -- MOS34 0316 DA30 ; allow test equipment to interrupt if present -- MOS34 0317 DA30 ; -- MOS34 0318 DA30 58 CLI -- MOS34 0319 DA31 ; ** TEST EQUIPMENT INTERRUPT MAY OCCUR HERE ** -- MOS34 0320 DA31 78 SEI -- MOS34 0321 DA32 ; -- MOS34 0322 DA32 24 FC BIT TEMPA -- MOS34 0323 DA34 50 03 BVC NOTST1 MOS34 0323 DA34 v7C MOS34 0324 DA36 ; C=0 MOS34 0323 DA34 v7C MOS34 0325 DA36 20 84 F0 JSR JMITST ;enter test routine (first call) MOS34 0323 DA34 v7C MOS34 0326 DA39 NOTST1 MOS34 0323 DA34 v7C MOS34 0327 DA39 MOS34 0323 DA34 v7C MOS34 0328 DA39 MOS34 0323 DA34 v7C MOS34 0329 DA39 [ FALSE=0 MOS34 0323 DA34 v7C MOS34 0348 DA39 ] MOS34 0323 DA34 v7C MOS34 0349 DA39 MOS34 0323 DA34 v7C MOS34 0350 DA39 MOS34 0323 DA34 v7C MOS34 0351 DA39 ; initialise 6522s MOS34 0323 DA34 v7C MOS34 0352 DA39 ; MOS34 0323 DA34 v7C MOS34 0353 DA39 A2 F2 LDXIM &F2 ;enable TIMER1(clock,40), TIMER2(speech,20) -- MOS34 0354 DA3B ; CB1(ADC,10), CA1(VSYNC,02) and NOT[CA2(keyboard,01)] -- MOS34 0355 DA3B 8E 4E FE STX IERQ -- MOS34 0356 DA3E -- MOS34 0357 DA3E -- MOS34 0358 DA3E ; initialise peripheral control register -- MOS34 0359 DA3E ; -- MOS34 0360 DA3E A2 04 LDXIM &04 -- MOS34 0361 DA40 8E 4C FE STX PCRQ ;select CA2 positive active edge -- MOS34 0362 DA43 -- MOS34 0363 DA43 -- MOS34 0364 DA43 ; setup centisecond timer -- MOS34 0365 DA43 ; -- MOS34 0366 DA43 A9 60 LDAIM &60 ;TIMER1 continuous, TIMER2 count pulses on PB6 -- MOS34 0367 DA45 8D 4B FE STA ACRQ -- MOS34 0368 DA48 -- MOS34 0369 DA48 -- MOS34 0370 DA48 ; N.B. ACRR zeroed by reset -- MOS34 0371 DA48 ; -- MOS34 0372 DA48 ; set timer hi-byte -- MOS34 0373 DA48 ; -- MOS34 0374 DA48 A9 0E LDAIM &0E ;timer 1 period = 998 usec -- MOS34 0375 DA4A 8D 46 FE STA TQLLQ -- MOS34 0376 DA4D 8D 6C FE STA PCRR ;set CA2 hi (for printer) -- MOS34 0377 DA50 ; -- MOS34 0378 DA50 ; start conversion on analog/digital chip -- MOS34 0379 DA50 ; -- MOS34 0380 DA50 8D C0 FE STA ADCCTL ;12 bits from chip channel 2 -- MOS34 0381 DA53 -- MOS34 0382 DA53 -- MOS34 0383 DA53 ; check whether 6522B present -- MOS34 0384 DA53 ; -- MOS34 0385 DA53 CD 6C FE CMP PCRR -- MOS34 0386 DA56 F0 03 BEQ B6522E ;[6522B exists] MOS34 0386 DA56 v7C MOS34 0387 DA58 ; MOS34 0386 DA56 v7C MOS34 0388 DA58 ; 6522B does not exist MOS34 0386 DA56 v7C MOS34 0389 DA58 ; MOS34 0386 DA56 v7C MOS34 0390 DA58 EE 77 02 INC B6522 ;B6522 := $00 MOS34 0386 DA56 v7C MOS34 0391 DA5B B6522E MOS34 0386 DA56 v7C MOS34 0392 DA5B ; MOS34 0386 DA56 v7C MOS34 0393 DA5B ; set timer lo-byte MOS34 0386 DA56 v7C MOS34 0394 DA5B ; MOS34 0386 DA56 v7C MOS34 0395 DA5B A9 27 LDAIM &27 -- MOS34 0396 DA5D 8D 47 FE STA TQLHQ -- MOS34 0397 DA60 8D 45 FE STA TQCHQ -- MOS34 0398 DA63 -- MOS34 0399 DA63 -- MOS34 0400 DA63 ; kill sound -- MOS34 0401 DA63 ; -- MOS34 0402 DA63 20 A6 EC JSR SNDRST -- MOS34 0403 DA66 -- MOS34 0404 DA66 -- MOS34 0405 DA66 ; ensure motor off -- MOS34 0406 DA66 ; reinitialise serproc -- MOS34 0407 DA66 ; -- MOS34 0408 DA66 AD 82 02 LDA SPREGA -- MOS34 0409 DA69 29 7F ANDIM &7F -- MOS34 0410 DA6B 20 1B E7 JSR STASP ;STA SPREGA, STA SERPRC -- MOS34 0411 DA6E ; X, Y corrupted -- MOS34 0412 DA6E -- MOS34 0413 DA6E -- MOS34 0414 DA6E ; conditionally reset soft keys -- MOS34 0415 DA6E ; soft keys are reset -- MOS34 0416 DA6E ; (a) after a hard reset -- MOS34 0417 DA6E ; (b) if reset occurred during a critical update of the soft keys -- MOS34 0418 DA6E ; -- MOS34 0419 DA6E AE 84 02 LDX USKFLG -- MOS34 0420 DA71 F0 03 BEQ SKOK MOS34 0420 DA71 v7C MOS34 0421 DA73 20 F1 E9 JSR RSOFT ;reset soft keys, sets X=0 MOS34 0420 DA71 v7C MOS34 0422 DA76 SKOK MOS34 0420 DA71 v7C MOS34 0423 DA76 ; X=0 MOS34 0420 DA71 v7C MOS34 0424 DA76 MOS34 0420 DA71 v7C MOS34 0425 DA76 MOS34 0420 DA71 v7C MOS34 0426 DA76 ; compare ROMs MOS34 0420 DA71 v7C MOS34 0427 DA76 ; MOS34 0420 DA71 v7C MOS34 0428 DA76 CRX MOS34 0420 DA71 v7C MOS34 0429 DA76 20 E2 DB JSR STXROM ;select ROM MOS34 0486 DAC8 ^2C MOS34 0430 DA79 ; MOS34 0486 DAC8 ^2C MOS34 0431 DA79 ; check for copyright string MOS34 0486 DAC8 ^2C MOS34 0432 DA79 ; MOS34 0486 DAC8 ^2C MOS34 0433 DA79 A2 03 LDXIM &03 MOS34 0486 DAC8 ^2C MOS34 0434 DA7B AC 07 80 LDY COPYRP MOS34 0486 DAC8 ^2C MOS34 0435 DA7E CRCPYR MOS34 0486 DAC8 ^2C MOS34 0436 DA7E B9 00 80 LDAAY LANG MOS34 0486 DAC8 ^2C MOS34 0437 DA81 DD 23 F5 CMPAX COPYR MOS34 0486 DAC8 ^2C MOS34 0438 DA84 D0 2E BNE CRBAD MOS34 0486 DAC8 ^2C MOS34 0439 DA86 C8 INY MOS34 0486 DAC8 ^2C MOS34 0440 DA87 CA DEX MOS34 0486 DAC8 ^2C MOS34 0441 DA88 10 F4 BPL CRCPYR MOS34 0486 DAC8 ^2C MOS34 0442 DA8A ; MOS34 0486 DAC8 ^2C MOS34 0443 DA8A ; ROM has copyright string MOS34 0486 DAC8 ^2C MOS34 0444 DA8A ; MOS34 0486 DAC8 ^2C MOS34 0445 DA8A A6 F4 LDX ROMID MOS34 0486 DAC8 ^2C MOS34 0446 DA8C A4 F4 LDY ROMID MOS34 0486 DAC8 ^2C MOS34 0447 DA8E CRY MOS34 0486 DAC8 ^2C MOS34 0448 DA8E C8 INY MOS34 0486 DAC8 ^2C MOS34 0449 DA8F C0 10 CPYIM NROM MOS34 0486 DAC8 ^2C MOS34 0450 DA91 B0 25 BCS CRNX ;[Y > number of ROMs] MOS34 0486 DAC8 ^2C MOS34 0451 DA93 98 TYA MOS34 0486 DAC8 ^2C MOS34 0452 DA94 49 FF EORIM &FF MOS34 0486 DAC8 ^2C MOS34 0453 DA96 85 FA STA CRLO MOS34 0486 DAC8 ^2C MOS34 0454 DA98 A9 7F LDAIM &7F ;N.B. this is LANG / - 1 MOS34 MOS34 MOS34 MOS34 Acorn macro assembler Page 60 MOS34 Entry point after hardware break/reset MOS34 MOS34 0486 DAC8 ^2C MOS34 0455 DA9A 85 FB STA CRHI MOS34 0486 DAC8 ^2C MOS34 0456 DA9C CRLOOP MOS34 0486 DAC8 ^2C MOS34 0457 DA9C 8C 30 FE STY ROM ;select second (Y) ROM MOS34 0486 DAC8 ^2C MOS34 0458 DA9F B1 FA LDAIY CRLO MOS34 0486 DAC8 ^2C MOS34 0459 DAA1 8E 30 FE STX ROM ;select first (X) ROM MOS34 0486 DAC8 ^2C MOS34 0460 DAA4 D1 FA CMPIY CRLO MOS34 0486 DAC8 ^2C MOS34 0461 DAA6 D0 E6 BNE CRY ;[ROMs do not match] MOS34 0486 DAC8 ^2C MOS34 0462 DAA8 E6 FA INC CRLO MOS34 0486 DAC8 ^2C MOS34 0463 DAAA D0 F0 BNE CRLOOP MOS34 0486 DAC8 ^2C MOS34 0464 DAAC E6 FB INC CRHI MOS34 0486 DAC8 ^2C MOS34 0465 DAAE A5 FB LDA CRHI MOS34 0486 DAC8 ^2C MOS34 0466 DAB0 C9 84 CMPIM &84 ;compare only first 1K of ROMs MOS34 0486 DAC8 ^2C MOS34 0467 DAB2 90 E8 BCC CRLOOP MOS34 0486 DAC8 ^2C MOS34 0468 DAB4 ; ROMs match MOS34 0486 DAC8 ^2C MOS34 0469 DAB4 CRBAD MOS34 0486 DAC8 ^2C MOS34 0470 DAB4 A6 F4 LDX ROMID MOS34 0486 DAC8 ^2C MOS34 0471 DAB6 10 0D BPL CRNX1 ;[ALWAYS jump] MOS34 0486 DAC8 ^2C MOS34 0472 DAB8 ; NEVER fall thru MOS34 0486 DAC8 ^2C MOS34 0473 DAB8 ; MOS34 0486 DAC8 ^2C MOS34 0474 DAB8 CRNX MOS34 0486 DAC8 ^2C MOS34 0475 DAB8 AD 06 80 LDA ROMTYP MOS34 0486 DAC8 ^2C MOS34 0476 DABB 9D A1 02 STAAX ROMS ;store type of recognised ROM MOS34 0486 DAC8 ^2C MOS34 0477 DABE ; check for BASIC ROM MOS34 0486 DAC8 ^2C MOS34 0478 DABE ;***** N.B. WHITE BASIC MAY NEED 'ANDIM $FE' ***** MOS34 0486 DAC8 ^2C MOS34 0479 DABE 29 8F ANDIM &8F MOS34 0486 DAC8 ^2C MOS34 0480 DAC0 D0 03 BNE CRNX1 ;[not a BASIC ROM] MOS34 0486 DAC8 ^2C MOS34 0481 DAC2 ; BASIC ROM - remember ROM id for *BASIC command MOS34 0486 DAC8 ^2C MOS34 0482 DAC2 8E 4B 02 STX BROMID MOS34 0486 DAC8 ^2C MOS34 0483 DAC5 CRNX1 MOS34 0486 DAC8 ^2C MOS34 0484 DAC5 E8 INX MOS34 0486 DAC8 ^2C MOS34 0485 DAC6 E0 10 CPXIM NROM MOS34 0486 DAC8 ^2C MOS34 0486 DAC8 90 AC BCC CRX ;[X a valid ROM number] -- MOS34 0487 DACA -- MOS34 0488 DACA [ NOSP = &00 -- MOS34 0490 DACA | -- MOS34 0491 DACA ; X=NROM -- MOS34 0492 DACA ; -- MOS34 0493 DACA ; if speech chip ready is still high then the chip has not been fitted -- MOS34 0494 DACA ; -- MOS34 0495 DACA 2C 40 FE BIT PBQ -- MOS34 0496 DACD 30 11 BMI START1 ;[chip does not exist] MOS34 0496 DACD v6E MOS34 0497 DACF ; X=NROM MOS34 0496 DACD v6E MOS34 0498 DACF ; speech chip present MOS34 0496 DACD v6E MOS34 0499 DACF ; MOS34 0496 DACD v6E MOS34 0500 DACF CE 7B 02 DEC SPFLAG ;SPFLAG := $FF MOS34 0496 DACD v6E MOS34 0501 DAD2 ; X=NROM MOS34 0496 DACD v6E MOS34 0502 DAD2 ; reset speech processor MOS34 0496 DACD v6E MOS34 0503 DAD2 ; MOS34 0496 DACD v6E MOS34 0504 DAD2 ; write NROM * $FF (reset) to speech processor MOS34 0496 DACD v6E MOS34 0505 DAD2 SPRST1 MOS34 0496 DACD v6E MOS34 0506 DAD2 A0 FF LDYIM SPOPRT MOS34 0496 DACD v6E MOS34 0507 DAD4 20 BB EE JSR WSPECH ;N.B. corrupts A and Y MOS34 0496 DACD v6E MOS34 0508 DAD7 CA DEX MOS34 0496 DACD v6E MOS34 0509 DAD8 D0 F8 BNE SPRST1 MOS34 0496 DACD v6E MOS34 0510 DADA ; X=0 MOS34 0496 DACD v6E MOS34 0511 DADA ; MOS34 0496 DACD v6E MOS34 0512 DADA 8E 48 FE STX TRCLQ MOS34 0496 DACD v6E MOS34 0513 DADD 8E 49 FE STX TRCHQ ;enable interrupt after one negative pulse on PB6 (speech int) MOS34 0496 DACD v6E MOS34 0514 DAE0 ] MOS34 0496 DACD v6E MOS34 0515 DAE0 MOS34 0496 DACD v6E MOS34 0516 DAE0 START1 MOS34 0496 DACD v6E MOS34 0517 DAE0 MOS34 0496 DACD v6E MOS34 0518 DAE0 MOS34 0496 DACD v6E MOS34 0519 DAE0 AD 8F 02 LDA OPTION ;initialise graphics mode from start-up options -- MOS34 0520 DAE3 20 00 C3 JSR VDINIT ;initialise VDU module -- MOS34 0521 DAE6 -- MOS34 0522 DAE6 -- MOS34 0523 DAE6 ; set up reset soft key (fA) -- MOS34 0524 DAE6 ; -- MOS34 0525 DAE6 A0 CA LDYIM BREKEY -- MOS34 0526 DAE8 20 68 E5 JSR RDCHS ;set to expand softkeyA immediately -- MOS34 0527 DAEB ; C=0 cos buffer empty -- MOS34 0528 DAEB ; -- MOS34 0529 DAEB ; let user intercept BREAK -- MOS34 0530 DAEB ; -- MOS34 0531 DAEB ; C=0 -- MOS34 0532 DAEB 20 45 EB JSR BREAK -- MOS34 0533 DAEE ; -- MOS34 0534 DAEE ; initialise CFS state -- MOS34 0535 DAEE ; -- MOS34 0536 DAEE 20 40 F1 JSR INIT -- MOS34 0537 DAF1 ; -- MOS34 0538 DAF1 ; check for tube -- MOS34 0539 DAF1 ; -- MOS34 0540 DAF1 A9 81 LDAIM &81 -- MOS34 0541 DAF3 8D E0 FE STA TREG0 -- MOS34 0542 DAF6 AD E0 FE LDA TREG0 -- MOS34 0543 DAF9 6A RORA -- MOS34 0544 DAFA 90 0A BCC NOTUBE ;[tube not present] MOS34 0544 DAFA v75 MOS34 0545 DAFC ; MOS34 0544 DAFA v75 MOS34 0546 DAFC ; tube present MOS34 0544 DAFA v75 MOS34 0547 DAFC ; MOS34 0544 DAFA v75 MOS34 0548 DAFC A2 FF LDXIM SVTUBE MOS34 0544 DAFA v75 MOS34 0549 DAFE 20 71 F1 JSR SVOP ;initialise tube MOS34 0544 DAFA v75 MOS34 0550 DB01 D0 03 BNE NOTUBE ;[tube software not present] MOS34 0544 DAFA v75 MOS34 0551 DB03 CE 7A 02 DEC TUBEM ;TUBEM := $FF MOS34 0544 DAFA v75 MOS34 0552 DB06 NOTUBE MOS34 0544 DAFA v75 MOS34 0553 DB06 ; MOS34 0544 DAFA v75 MOS34 0554 DB06 ; initialise service ROMs before writing to screen MOS34 0544 DAFA v75 MOS34 0555 DB06 ; MOS34 0544 DAFA v75 MOS34 0556 DB06 A0 0E LDYIM /(OSHWM ) ;Y := default high water mark -- MOS34 0557 DB08 ; -- MOS34 0558 DB08 A2 01 LDXIM SVSTAT ;offer static area -- MOS34 0559 DB0A 20 71 F1 JSR SVOP -- MOS34 0560 DB0D ; -- MOS34 0561 DB0D A2 02 LDXIM SVDYN ;offer dynamic area -- MOS34 0562 DB0F 20 71 F1 JSR SVOP -- MOS34 0563 DB12 ; -- MOS34 0564 DB12 8C 43 02 STY IHWM ;save adjusted high water mark -- MOS34 0565 DB15 8C 44 02 STY HWM ;save adjusted high water mark -- MOS34 0566 DB18 ; -- MOS34 0567 DB18 ; allow tube post-initialisation (e.g. exploding font) -- MOS34 0568 DB18 ; -- MOS34 0569 DB18 A2 FE LDXIM SVTPIN ;******** ASSUMED = $FE ******** -- MOS34 0570 DB1A AC 7A 02 LDY TUBEM ;pass tube flag as argument -- MOS34 0571 DB1D 20 71 F1 JSR SVOP -- MOS34 0572 DB20 ; A=$00 (tube present) -- MOS34 0573 DB20 ; A=$FF (tube not present) -- MOS34 0574 DB20 ; -- MOS34 0575 DB20 ; conditionally output start-up message -- MOS34 0576 DB20 ; 'BBC Computer' MOS34 MOS34 MOS34 MOS34 Acorn macro assembler Page 61 MOS34 Entry point after hardware break/reset MOS34 -- MOS34 0577 DB20 ; -- MOS34 0578 DB20 2D 67 02 AND QUIET ;may be set by paged ROM -- MOS34 0579 DB23 10 1B BPL ENTER ;[shshh ... you know who] MOS34 0579 DB23 v64 MOS34 0580 DB25 ; MOS34 0579 DB23 v64 MOS34 0581 DB25 ; output start up message MOS34 0579 DB23 v64 MOS34 0582 DB25 ; MOS34 0579 DB23 v64 MOS34 0583 DB25 A0 02 LDYIM MSGBBC-&01 MOS34 0579 DB23 v64 MOS34 0584 DB27 20 5C DE JSR WRSTR MOS34 0579 DB23 v64 MOS34 0585 DB2A ; MOS34 0579 DB23 v64 MOS34 0586 DB2A ; indicate model type MOS34 0579 DB23 v64 MOS34 0587 DB2A ; MOS34 0579 DB23 v64 MOS34 0588 DB2A AD 8D 02 LDA TYPE MOS34 0579 DB23 v64 MOS34 0589 DB2D F0 0C BEQ Z ;[soft restart] MOS34 0579 DB23 v64 MOS34 0590 DB2F ; MOS34 0579 DB23 v64 MOS34 0591 DB2F ; hard restart MOS34 0579 DB23 v64 MOS34 0592 DB2F ; complete message MOS34 0579 DB23 v64 MOS34 0593 DB2F ; MOS34 0579 DB23 v64 MOS34 0594 DB2F A0 16 LDYIM MSG32K-&01 MOS34 0579 DB23 v64 MOS34 0595 DB31 2C 8E 02 BIT MODELB MOS34 0579 DB23 v64 MOS34 0596 DB34 30 02 BMI B ;[model B] MOS34 0579 DB23 v64 MOS34 0597 DB36 ; MOS34 0579 DB23 v64 MOS34 0598 DB36 ; model A MOS34 0579 DB23 v64 MOS34 0599 DB36 ; MOS34 0579 DB23 v64 MOS34 0600 DB36 A0 11 LDYIM MSG16K-&01 MOS34 0579 DB23 v64 MOS34 0601 DB38 B MOS34 0579 DB23 v64 MOS34 0602 DB38 20 5C DE JSR WRSTR MOS34 0579 DB23 v64 MOS34 0603 DB3B Z MOS34 0579 DB23 v64 MOS34 0604 DB3B A0 1B LDYIM MSG2CR-&01 MOS34 0579 DB23 v64 MOS34 0605 DB3D 20 5C DE JSR WRSTR MOS34 0579 DB23 v64 MOS34 0606 DB40 ; MOS34 0579 DB23 v64 MOS34 0607 DB40 ENTER ;initialise TAPE/DISC MOS34 0579 DB23 v64 MOS34 0608 DB40 ; MOS34 0579 DB23 v64 MOS34 0609 DB40 ; let user intercept BREAK after filing system initialisation MOS34 0579 DB23 v64 MOS34 0610 DB40 ; MOS34 0579 DB23 v64 MOS34 0611 DB40 38 SEC -- MOS34 0612 DB41 20 45 EB JSR BREAK -- MOS34 0613 DB44 ; -- MOS34 0614 DB44 ; service ROMs again -- MOS34 0615 DB44 ; test for auto-boot condition (SHIFT and startup option bit3) -- MOS34 0616 DB44 ; -- MOS34 0617 DB44 20 02 EA JSR MOSTST ;test shift -- MOS34 0618 DB47 [ MOS125 = &FF -- MOS34 0621 DB47 | -- MOS34 0622 DB47 ;Slightly iffy using A directly as no other callers of MOSTST do -- MOS34 0623 DB47 ;however MOSTST always returns SHIFT state in both N and A b7 -- MOS34 0624 DB47 ] -- MOS34 0625 DB47 4A LSRA -- MOS34 0626 DB48 4A LSRA -- MOS34 0627 DB49 4A LSRA -- MOS34 0628 DB4A 4A LSRA -- MOS34 0629 DB4B 4D 8F 02 EOR OPTION -- MOS34 0630 DB4E 29 08 ANDIM &08 ;use bit3 -- MOS34 0631 DB50 A8 TAY ;Y=0 => auto-boot, Y<>0 => do not auto-boot -- MOS34 0632 DB51 A2 03 LDXIM SVBOOT ;offer bootstrap -- MOS34 0633 DB53 20 71 F1 JSR SVOP -- MOS34 0634 DB56 F0 30 BEQ SLANG ;[file system booted] MOS34 0634 DB56 v4F MOS34 0635 DB58 ; MOS34 0634 DB56 v4F MOS34 0636 DB58 ; file system not booted - try to auto-boot from SEROM MOS34 0634 DB56 v4F MOS34 0637 DB58 ; MOS34 0634 DB56 v4F MOS34 0638 DB58 98 TYA MOS34 0634 DB56 v4F MOS34 0639 DB59 D0 27 BNE NOAUTO ;[do not auto boot] MOS34 0634 DB56 v4F MOS34 0640 DB5B ; MOS34 0634 DB56 v4F MOS34 0641 DB5B ; auto-boot from SEROM MOS34 0634 DB56 v4F MOS34 0642 DB5B ; MOS34 0634 DB56 v4F MOS34 0643 DB5B A9 8D LDAIM FXSROM MOS34 0634 DB56 v4F MOS34 0644 DB5D 20 4C F1 JSR CROM ;'*ROM' MOS34 0634 DB56 v4F MOS34 0645 DB60 A2 3E LDXIM SLBOOT MOS34 0634 DB56 v4F MOS34 0646 DB62 A0 EB LDYIM /(SLBOOT ) MOS34 0634 DB56 v4F MOS34 0647 DB64 CE 67 02 DEC QUIET ;flag as loading auto-boot program MOS34 0634 DB56 v4F MOS34 0648 DB67 20 F7 FF JSR OSCLI ;'/!BOOT' MOS34 0634 DB56 v4F MOS34 0649 DB6A EE 67 02 INC QUIET ;flag as not loading auto-boot program MOS34 0634 DB56 v4F MOS34 0650 DB6D ; if an error occurs whilst running the !BOOT program MOS34 0634 DB56 v4F MOS34 0651 DB6D ; then the MOS jumps to EBRK (early BRK) MOS34 0634 DB56 v4F MOS34 0652 DB6D D0 19 BNE DNRFS ;[ALWAYS jump, do not reset filing system] MOS34 0634 DB56 v4F MOS34 0653 DB6F ; MOS34 0634 DB56 v4F MOS34 0654 DB6F [ MOS125 = &FF MOS34 0634 DB56 v4F MOS34 0655 DB6F | MOS34 0634 DB56 v4F MOS34 0656 DB6F ;Restoring OS 1.20 behaviour: MOS34 0634 DB56 v4F MOS34 0657 DB6F ;*FX215,0 by early birds (or *FX215,255 by RFS !BOOT) MOS34 0634 DB56 v4F MOS34 0658 DB6F ;forces *TAPE12 on successful completion of RFS !BOOT MOS34 0634 DB56 v4F MOS34 0659 DB6F ;with no error message printed MOS34 0634 DB56 v4F MOS34 0660 DB6F F0 11 BEQ NOAUTO MOS34 0634 DB56 v4F MOS34 0661 DB71 ;NEVER fall through MOS34 0634 DB56 v4F MOS34 0662 DB71 MOS34 0634 DB56 v4F MOS34 0663 DB71 DEFBRK ;default BRK routine outputs error message MOS34 0634 DB56 v4F MOS34 0664 DB71 ; assume still decimal mode MOS34 0634 DB56 v4F MOS34 0665 DB71 A0 00 LDYIM ZERO MOS34 0634 DB56 v4F MOS34 0666 DB73 20 64 DE JSR WRSTR1 ;output error message MOS34 0634 DB56 v4F MOS34 0667 DB76 ; check whether within auto-boot program MOS34 0634 DB56 v4F MOS34 0668 DB76 AD 67 02 LDA QUIET MOS34 0634 DB56 v4F MOS34 0669 DB79 6A RORA MOS34 0634 DB56 v4F MOS34 0670 DB7A STOP MOS34 0634 DB56 v4F MOS34 0671 DB7A B0 FE BCS STOP ;hang if not within auto-boot program MOS34 0634 DB56 v4F MOS34 0672 DB7C 20 E7 FF JSR OSNEWL MOS34 0634 DB56 v4F MOS34 0673 DB7F 20 E7 FF JSR OSNEWL ;place 2*CR/LF after error message MOS34 0634 DB56 v4F MOS34 0674 DB82 ;fall through MOS34 0634 DB56 v4F MOS34 0675 DB82 ] MOS34 0634 DB56 v4F MOS34 0676 DB82 MOS34 0634 DB56 v4F MOS34 0677 DB82 NOAUTO MOS34 0634 DB56 v4F MOS34 0678 DB82 EBRK ;unexpected (early) BRK (e.g. 'File not found') MOS34 0634 DB56 v4F MOS34 0679 DB82 ; MOS34 0634 DB56 v4F MOS34 0680 DB82 ; initialise cassette filing system (CFS) MOS34 0634 DB56 v4F MOS34 0681 DB82 ; MOS34 0634 DB56 v4F MOS34 0682 DB82 A9 00 LDAIM ZERO ;select CFS MOS34 0634 DB56 v4F MOS34 0683 DB84 AA TAX ;X:=0, select default baudrate (1200 baud) MOS34 0634 DB56 v4F MOS34 0684 DB85 20 4E F1 JSR TAPE12 ;initialise CFS MOS34 0634 DB56 v4F MOS34 0685 DB88 ; MOS34 0634 DB56 v4F MOS34 0686 DB88 DNRFS ;do not reset filing system MOS34 0634 DB56 v4F MOS34 0687 DB88 ; MOS34 0634 DB56 v4F MOS34 0688 DB88 SLANG ;select a language ROM to enter MOS34 0634 DB56 v4F MOS34 0689 DB88 AD 8D 02 LDA TYPE -- MOS34 0690 DB8B D0 05 BNE SLANG1 ;[hard restart - use same language as last time] MOS34 0690 DB8B v7A MOS34 0691 DB8D ; MOS34 0690 DB8B v7A MOS34 0692 DB8D ; soft restart - ensure language exists MOS34 0690 DB8B v7A MOS34 0693 DB8D ; A b0=0 used by ILR2 enter ROM with C=0 MOS34 0690 DB8B v7A MOS34 0694 DB8D ; MOS34 0690 DB8B v7A MOS34 0695 DB8D AE 8C 02 LDX LROMID MOS34 0690 DB8B v7A MOS34 0696 DB90 10 1E BPL ILR2 ;[language does exist] MOS34 0696 DB90 v61 MOS34 0697 DB92 ; MOS34 0696 DB90 v61 MOS34 0698 DB92 SLANG1 ;find first language ROM MOS34 0696 DB90 v61 MOS34 0699 DB92 ; MOS34 MOS34 MOS34 MOS34 Acorn macro assembler Page 62 MOS34 Entry point after hardware break/reset MOS34 MOS34 0696 DB90 v61 MOS34 0700 DB92 A2 0F LDXIM NROM-&1 MOS34 0696 DB90 v61 MOS34 0701 DB94 ILR1 MOS34 0696 DB90 v61 MOS34 0702 DB94 BD A1 02 LDAAX ROMS MOS34 0696 DB90 v61 MOS34 0703 DB97 [ MOS125 = &FF MOS34 0696 DB90 v61 MOS34 0705 DB97 | MOS34 0696 DB90 v61 MOS34 0706 DB97 0A ASLA ;b0=0 used by ILR2 enter ROM with C=0 MOS34 0696 DB90 v61 MOS34 0707 DB98 ] MOS34 0696 DB90 v61 MOS34 0708 DB98 30 16 BMI ILR2 ;[found language ROM] MOS34 0696 DB90 v61 MOS34 0709 DB9A ; MOS34 0696 DB90 v61 MOS34 0710 DB9A CA DEX MOS34 0696 DB90 v61 MOS34 0711 DB9B 10 F7 BPL ILR1 ;[continue search for language ROM] MOS34 0696 DB90 v61 MOS34 0712 DB9D ; MOS34 0696 DB90 v61 MOS34 0713 DB9D A9 00 LDAIM LGNONE MOS34 0696 DB90 v61 MOS34 0714 DB9F 2C 7A 02 BIT TUBEM MOS34 0696 DB90 v61 MOS34 0715 DBA2 30 30 BMI TLANG ;[tube active] MOS34 0715 DBA2 v4F MOS34 0716 DBA4 ; neither language nor tube present MOS34 0715 DBA2 v4F MOS34 0717 DBA4 00 BRK MOS34 0715 DBA2 v4F MOS34 0718 DBA5 F9 = NOLROM MOS34 0715 DBA2 v4F MOS34 0719 DBA6 4C 61 6E = "Language?" MOS34 0715 DBA2 v4F MOS34 0720 DBAF 00 = ZERO MOS34 0715 DBA2 v4F MOS34 0721 DBB0 ; MOS34 0715 DBA2 v4F MOS34 0722 DBB0 [ MOS125 = &FF MOS34 0715 DBA2 v4F MOS34 0725 DBB0 | MOS34 0715 DBA2 v4F MOS34 0726 DBB0 ILR2 ;*BASIC enters with A b0=1 indicate manual entry MOS34 0715 DBA2 v4F MOS34 0727 DBB0 4A LSRA ;C=0 indicate to tube that this is a restart MOS34 0715 DBA2 v4F MOS34 0728 DBB1 ] MOS34 0715 DBA2 v4F MOS34 0729 DBB1 SELANG ;FX entry point, entered with C=1 (for tube) MOS34 0715 DBA2 v4F MOS34 0730 DBB1 ; found language ROM MOS34 0715 DBA2 v4F MOS34 0731 DBB1 ; select language ROM MOS34 0715 DBA2 v4F MOS34 0732 DBB1 08 PHP ;save entry type (present in C) MOS34 0715 DBA2 v4F MOS34 0733 DBB2 [ MOS125 = &FF MOS34 0715 DBA2 v4F MOS34 0735 DBB2 ] MOS34 0715 DBA2 v4F MOS34 0736 DBB2 20 E2 DB JSR STXROM MOS34 0715 DBA2 v4F MOS34 0737 DBB5 ; output ROM message MOS34 0715 DBA2 v4F MOS34 0738 DBB5 A9 80 LDAIM /(LANG ) MOS34 0715 DBA2 v4F MOS34 0739 DBB7 A0 08 LDYIM ROMMSG-&1 MOS34 0715 DBA2 v4F MOS34 0740 DBB9 20 5E DE JSR WRSTRA MOS34 0715 DBA2 v4F MOS34 0741 DBBC ; N.B. Y offset left pointing to copyright message MOS34 0715 DBA2 v4F MOS34 0742 DBBC 84 FD STY REPTR +&00 MOS34 0715 DBA2 v4F MOS34 0743 DBBE 20 E7 FF JSR OSNEWL MOS34 0715 DBA2 v4F MOS34 0744 DBC1 20 E7 FF JSR OSNEWL MOS34 0715 DBA2 v4F MOS34 0745 DBC4 ; MOS34 0715 DBA2 v4F MOS34 0746 DBC4 ; enter language MOS34 0715 DBA2 v4F MOS34 0747 DBC4 ; MOS34 0715 DBA2 v4F MOS34 0748 DBC4 28 PLP ;restore entry type into C MOS34 0715 DBA2 v4F MOS34 0749 DBC5 [ MOS125 = &FF MOS34 0715 DBA2 v4F MOS34 0750 DBC5 | MOS34 0715 DBA2 v4F MOS34 0751 DBC5 ;preserve BRK handler until all printing done MOS34 0715 DBA2 v4F MOS34 0752 DBC5 A5 F4 LDA ROMID MOS34 0715 DBA2 v4F MOS34 0753 DBC7 8D 8C 02 STA LROMID MOS34 0715 DBA2 v4F MOS34 0754 DBCA ] MOS34 0715 DBA2 v4F MOS34 0755 DBCA A9 01 LDAIM LGENTR ;entry reason MOS34 0715 DBA2 v4F MOS34 0756 DBCC 2C 7A 02 BIT TUBEM MOS34 0715 DBA2 v4F MOS34 0757 DBCF 30 03 BMI TLANG ;[tube active] MOS34 0715 DBA2 v4F MOS34 0758 DBD1 4C 00 80 JMP ROMHRD ;ROM entry MOS34 0715 DBA2 v4F MOS34 0759 DBD4 TLANG MOS34 0715 DBA2 v4F MOS34 0760 DBD4 4C 00 04 JMP TBLANG ;tube entry -- MOS34 0761 DBD7 -- MOS34 0762 DBD7 -- MOS34 0763 DBD7 LNK MOS36 -- MOS36 0001 DBD7 ; > MOS36 -- MOS36 0002 DBD7 TTL MOS36 Int servicing -- MOS36 0003 DBD7 OPT MOS36 MOS36 MOS36 MOS36 MOS36 Acorn macro assembler Page 63 MOS36 MOS36 Int servicing MOS36 -- MOS36 0004 DBD7 -- MOS36 0005 DBD7 ;(c) 1981 ACORN Computers Limited -- MOS36 0006 DBD7 ;BBC MOS -- MOS36 0007 DBD7 ;Change record: -- MOS36 0008 DBD7 -- MOS36 0009 DBD7 ;Author(s): -- MOS36 0010 DBD7 ;PB Paul Bond -- MOS36 0011 DBD7 -- MOS36 0012 DBD7 ; interrupt service mainline -- MOS36 0013 DBD7 ; priority sequence:- -- MOS36 0014 DBD7 ; [6850] -- MOS36 0015 DBD7 ; 1. RS423 -- MOS36 0016 DBD7 ; [6522a] -- MOS36 0017 DBD7 ; 2. VSYNC -- MOS36 0018 DBD7 ; 3. centisecond timer -- MOS36 0019 DBD7 ; 4. ADC -- MOS36 0020 DBD7 ; 5. keyboard -- MOS36 0021 DBD7 ; [6522b] -- MOS36 0022 DBD7 ; 6. printer (parallel interface) -- MOS36 0023 DBD7 -- MOS36 0024 DBD7 -- MOS36 0025 DBD7 RPROM ;read byte from paged ROM -- MOS36 0026 DBD7 ; read byte at ROMPTR in ROM Y into A -- MOS36 0027 DBD7 A6 F4 LDX ROMID -- MOS36 0028 DBD9 84 F4 STY ROMID -- MOS36 0029 DBDB 8C 30 FE STY ROM -- MOS36 0030 DBDE A0 00 LDYIM ZERO -- MOS36 0031 DBE0 B1 F6 LDAIY ROMPTR -- MOS36 0032 DBE2 STXROM -- MOS36 0033 DBE2 86 F4 STX ROMID -- MOS36 0034 DBE4 8E 30 FE STX ROM -- MOS36 0035 DBE7 60 RTS -- MOS36 0036 DBE8 -- MOS36 0037 DBE8 -- MOS36 0038 DBE8 -- MOS36 0039 DBE8 IRQ ;entered at IRQ or BRK -- MOS36 0040 DBE8 85 FC STA TEMPA -- MOS36 0041 DBEA 68 PLA -- MOS36 0042 DBEB 48 PHA ;A := processor status -- MOS36 0043 DBEC 29 10 ANDIM &10 -- MOS36 0044 DBEE D0 03 BNE BRK MOS36 0044 DBEE v7C MOS36 0045 DBF0 6C 04 02 JMI IRQALL ;indirect thru 'all IRQs' routine MOS36 0044 DBEE v7C MOS36 0046 DBF3 ; (defaults to DEFIRQ) MOS36 0044 DBEE v7C MOS36 0047 DBF3 ; MOS36 0044 DBEE v7C MOS36 0048 DBF3 BRK MOS36 0044 DBEE v7C MOS36 0049 DBF3 8A TXA -- MOS36 0050 DBF4 48 PHA ;save X -- MOS36 0051 DBF5 BA TSX -- MOS36 0052 DBF6 BD 03 01 LDAAX &0100+&03 ;get address low -- MOS36 0053 DBF9 D8 CLD -- MOS36 0054 DBFA 38 SEC -- MOS36 0055 DBFB E9 01 SBCIM &01 -- MOS36 0056 DBFD 85 FD STA REPTR +&00 -- MOS36 0057 DBFF BD 04 01 LDAAX &0100+&04 ;get address high -- MOS36 0058 DC02 E9 00 SBCIM ZERO -- MOS36 0059 DC04 85 FE STA REPTR +&01 -- MOS36 0060 DC06 ; record ROM source of BRK -- MOS36 0061 DC06 A5 F4 LDA ROMID -- MOS36 0062 DC08 8D 4A 02 STA REPROM -- MOS36 0063 DC0B ; offer BRK to service ROMs -- MOS36 0064 DC0B 86 F0 STX BYTEX ;provide clean way for service ROM to access relevant stack area -- MOS36 0065 DC0D A2 06 LDXIM SVBRK -- MOS36 0066 DC0F 20 71 F1 JSR SVOP -- MOS36 0067 DC12 ; force language ROM (may be BASIC in pre-interface days) -- MOS36 0068 DC12 AE 8C 02 LDX LROMID -- MOS36 0069 DC15 20 E2 DB JSR STXROM ;reset to language ROM -- MOS36 0070 DC18 ; -- MOS36 0071 DC18 ; restore X -- MOS36 0072 DC18 ; -- MOS36 0073 DC18 68 PLA -- MOS36 0074 DC19 AA TAX -- MOS36 0075 DC1A ; -- MOS36 0076 DC1A ; restore A -- MOS36 0077 DC1A ; -- MOS36 0078 DC1A A5 FC LDA TEMPA -- MOS36 0079 DC1C ; -- MOS36 0080 DC1C ; enable interrupts and let user process BRK -- MOS36 0081 DC1C ; -- MOS36 0082 DC1C 58 CLI -- MOS36 0083 DC1D 6C 02 02 JMI BRKVEC ;process BRK, N.B. default is DEFBRK -- MOS36 0084 DC20 ; -- MOS36 0085 DC20 [ MOS125 = &FF -- MOS36 0098 DC20 ] -- MOS36 0099 DC20 -- MOS36 0100 DC20 -- MOS36 0101 DC20 TTL IRQ processing -- MOS36 0102 DC20 OPT OPNEWP MOS36 MOS36 MOS36 MOS36 Acorn macro assembler Page 64 MOS36 IRQ processing MOS36 -- MOS36 0103 DC20 -- MOS36 0104 DC20 -- MOS36 0105 DC20 TXDINT ;disable Tx interrupt -- MOS36 0106 DC20 ; -- MOS36 0107 DC20 ; RS423 printer selected but printer buffer empty -- MOS36 0108 DC20 ; -- MOS36 0109 DC20 38 SEC MOS36 0267 DC7E ^20 MOS36 0110 DC21 6E 4F 02 ROR RSFLAG ;flag RS423 available MOS36 0267 DC7E ^20 MOS36 0111 DC24 ; MOS36 0267 DC7E ^20 MOS36 0112 DC24 ; no more characters to print MOS36 0267 DC7E ^20 MOS36 0113 DC24 ; MOS36 0267 DC7E ^20 MOS36 0114 DC24 ; disable RS423 Tx MOS36 0267 DC7E ^20 MOS36 0115 DC24 ; find whether to set RTS hi or lo MOS36 0267 DC7E ^20 MOS36 0116 DC24 ; MOS36 0267 DC7E ^20 MOS36 0117 DC24 ; check whether RS423 Rx enabled MOS36 0267 DC7E ^20 MOS36 0118 DC24 ; MOS36 0267 DC7E ^20 MOS36 0119 DC24 2C 50 02 BIT RSCTFL MOS36 0267 DC7E ^20 MOS36 0120 DC27 10 07 BPL RLO ;[Rx disabled] MOS36 0267 DC7E ^20 MOS36 0121 DC29 ; MOS36 0267 DC7E ^20 MOS36 0122 DC29 ; Rx enabled MOS36 0267 DC7E ^20 MOS36 0123 DC29 ; MOS36 0267 DC7E ^20 MOS36 0124 DC29 ; check bytes in RS423 input buffer MOS36 0267 DC7E ^20 MOS36 0125 DC29 ; MOS36 0267 DC7E ^20 MOS36 0126 DC29 20 BF E2 JSR CNTRS MOS36 0267 DC7E ^20 MOS36 0127 DC2C ; MOS36 0267 DC7E ^20 MOS36 0128 DC2C ; C=0 => overflow, C=1 => no overflow MOS36 0267 DC7E ^20 MOS36 0129 DC2C ; check whether within overflow region MOS36 0267 DC7E ^20 MOS36 0130 DC2C ; MOS36 0267 DC7E ^20 MOS36 0131 DC2C A2 00 LDXIM RHITXD MOS36 0267 DC7E ^20 MOS36 0132 DC2E B0 02 BCS RSOK ;[not overflowing] MOS36 0267 DC7E ^20 MOS36 0133 DC30 ; MOS36 0267 DC7E ^20 MOS36 0134 DC30 ; within overflow region MOS36 0267 DC7E ^20 MOS36 0135 DC30 ; MOS36 0267 DC7E ^20 MOS36 0136 DC30 RLO ;set RTS lo, Tx interrupt disabled (unfortunately) MOS36 0267 DC7E ^20 MOS36 0137 DC30 A2 40 LDXIM RLOTXD MOS36 0267 DC7E ^20 MOS36 0138 DC32 ; MOS36 0267 DC7E ^20 MOS36 0139 DC32 RSOK ;set RTS hi/lo, Tx interrupt disabled MOS36 0267 DC7E ^20 MOS36 0140 DC32 4C 16 E2 JMP RSED ;disable Tx interrupts AND return from interrupt MOS36 0267 DC7E ^20 MOS36 0141 DC35 MOS36 0267 DC7E ^20 MOS36 0142 DC35 MOS36 0267 DC7E ^20 MOS36 0143 DC35 RX68 ;RS423 Rx interrupt MOS36 0267 DC7E ^20 MOS36 0144 DC35 ; MOS36 0267 DC7E ^20 MOS36 0145 DC35 ; A = 0|0|PE|OVRN|FE|CTS|DCD|TDRE MOS36 0267 DC7E ^20 MOS36 0146 DC35 ; MOS36 0267 DC7E ^20 MOS36 0147 DC35 AC 09 FE LDY RSDATA ;read data byte to clear interrupt MOS36 0267 DC7E ^20 MOS36 0148 DC38 29 3A ANDIM &3A ;CTS & TDRE are not relevant to Rx MOS36 0267 DC7E ^20 MOS36 0149 DC3A D0 26 BNE RX68BD ;[bad Rx, PE|OVRN|FE|DCD] MOS36 0267 DC7E ^20 MOS36 0150 DC3C ; MOS36 0267 DC7E ^20 MOS36 0151 DC3C ; good reception - move byte into RS423 input buffer MOS36 0267 DC7E ^20 MOS36 0152 DC3C ; MOS36 0267 DC7E ^20 MOS36 0153 DC3C AE 5C 02 LDX RSSHUT MOS36 0267 DC7E ^20 MOS36 0154 DC3F D0 09 BNE NRSI ;[suppress RS423 input] MOS36 0267 DC7E ^20 MOS36 0155 DC41 ; MOS36 0267 DC7E ^20 MOS36 0156 DC41 ; X=0 MOS36 0267 DC7E ^20 MOS36 0157 DC41 ; MOS36 0267 DC7E ^20 MOS36 0158 DC41 E8 INX ;X = BRSI = $01 MOS36 0267 DC7E ^20 MOS36 0159 DC42 20 6A E5 JSR RNSRT ;insert character into RS423 buffer MOS36 0267 DC7E ^20 MOS36 0160 DC45 ; MOS36 0267 DC7E ^20 MOS36 0161 DC45 ; check number of characters in buffer MOS36 0267 DC7E ^20 MOS36 0162 DC45 ; MOS36 0267 DC7E ^20 MOS36 0163 DC45 20 BF E2 JSR CNTRS MOS36 0267 DC7E ^20 MOS36 0164 DC48 ; MOS36 0267 DC7E ^20 MOS36 0165 DC48 ; check whether running into overflow area MOS36 0267 DC7E ^20 MOS36 0166 DC48 ; MOS36 0267 DC7E ^20 MOS36 0167 DC48 90 E6 BCC RLO ;[running into overflow area, set RTS lo, Tx interrupt disabled] MOS36 0267 DC7E ^20 MOS36 0168 DC4A NRSI ;suppress RS423 input MOS36 0267 DC7E ^20 MOS36 0169 DC4A 60 RTS MOS36 0267 DC7E ^20 MOS36 0170 DC4B MOS36 0267 DC7E ^20 MOS36 0171 DC4B MOS36 0267 DC7E ^20 MOS36 0172 DC4B [ MOS125 = &FF MOS36 0267 DC7E ^20 MOS36 0188 DC4B | MOS36 0267 DC7E ^20 MOS36 0189 DC4B VAT MOS36 0267 DC7E ^20 MOS36 0190 DC4B ] MOS36 0267 DC7E ^20 MOS36 0191 DC4B ; MOS36 0267 DC7E ^20 MOS36 0192 DC4B ; indicate in DEFIRQ MOS36 0267 DC7E ^20 MOS36 0193 DC4B ; MOS36 0267 DC7E ^20 MOS36 0194 DC4B B8 CLV MOS36 0267 DC7E ^20 MOS36 0195 DC4C ; MOS36 0267 DC7E ^20 MOS36 0196 DC4C IRQ68 ;check for interrupt from 6850 MOS36 0267 DC7E ^20 MOS36 0197 DC4C ; MOS36 0267 DC7E ^20 MOS36 0198 DC4C [ $Tutu MOS36 0267 DC7E ^20 MOS36 0201 DC4C | MOS36 0267 DC7E ^20 MOS36 0202 DC4C AD 08 FE LDA RSTAT MOS36 0267 DC7E ^20 MOS36 0203 DC4F ] MOS36 0267 DC7E ^20 MOS36 0204 DC4F 70 02 BVS RSTIME ;[timer interrupt] MOS36 0267 DC7E ^20 MOS36 0205 DC51 ; MOS36 0267 DC7E ^20 MOS36 0206 DC51 10 5D BPL IRQA ;[not a 6850 interrupt, N.B. possibly timer interrupt entry] MOS36 0267 DC7E ^20 MOS36 0207 DC53 ; MOS36 0267 DC7E ^20 MOS36 0208 DC53 RSTIME ;timer interrupt MOS36 0267 DC7E ^20 MOS36 0209 DC53 ; MOS36 0267 DC7E ^20 MOS36 0210 DC53 ; 6850 interrupt MOS36 0267 DC7E ^20 MOS36 0211 DC53 ; MOS36 0267 DC7E ^20 MOS36 0212 DC53 ; use RSTUT to decide where to route the interrupt MOS36 0267 DC7E ^20 MOS36 0213 DC53 ; MOS36 0267 DC7E ^20 MOS36 0214 DC53 A6 EA LDX RSTUT MOS36 0267 DC7E ^20 MOS36 0215 DC55 CA DEX MOS36 0267 DC7E ^20 MOS36 0216 DC56 30 30 BMI NOTCFS ;[RS423 not managed by CFS] MOS36 0267 DC7E ^20 MOS36 0217 DC58 ; MOS36 0267 DC7E ^20 MOS36 0218 DC58 ; inform CFS of the interrupt MOS36 0267 DC7E ^20 MOS36 0219 DC58 ; MOS36 0267 DC7E ^20 MOS36 0220 DC58 70 2D BVS RTS68 ;[ignore timer interrupt entry] MOS36 0267 DC7E ^20 MOS36 0221 DC5A 4C C2 F5 JMP IRUPT ;let CFS handle interrupt AND return from interrupt MOS36 0267 DC7E ^20 MOS36 0222 DC5D MOS36 0267 DC7E ^20 MOS36 0223 DC5D MOS36 0267 DC7E ^20 MOS36 0224 DC5D MDCD ;neither Rx not Tx interrupt => DCD interrupt MOS36 0267 DC7E ^20 MOS36 0225 DC5D ; MOS36 0267 DC7E ^20 MOS36 0226 DC5D AC 09 FE LDY RSDATA ;clear DCD interrupt MOS36 0267 DC7E ^20 MOS36 0227 DC60 2A ROLA ;DCD -> lo-bit MOS36 0267 DC7E ^20 MOS36 0228 DC61 0A ASLA ;restore status byte MOS36 0267 DC7E ^20 MOS36 0229 DC62 ; MOS36 0267 DC7E ^20 MOS36 0230 DC62 RX68BD ;bad RS423 Rx MOS36 0267 DC7E ^20 MOS36 0231 DC62 ; MOS36 0267 DC7E ^20 MOS36 0232 DC62 ; A = 0|0|PE|OVRN|FE|0|DCD|0 MOS36 0267 DC7E ^20 MOS36 0233 DC62 ; C=1 MOS36 0267 DC7E ^20 MOS36 0234 DC62 ; MOS36 0267 DC7E ^20 MOS36 0235 DC62 ; signal RS423 error MOS36 0267 DC7E ^20 MOS36 0236 DC62 ; MOS36 0267 DC7E ^20 MOS36 0237 DC62 AA TAX ;X := status MOS36 0267 DC7E ^20 MOS36 0238 DC63 98 TYA ;A := character MOS36 0267 DC7E ^20 MOS36 0239 DC64 A0 07 LDYIM EVRS ;RS423 error event MOS36 0267 DC7E ^20 MOS36 0240 DC66 4C 0C E5 JMP EVENT ;signal event AND return from interrupt MOS36 MOS36 MOS36 MOS36 Acorn macro assembler Page 65 MOS36 IRQ processing MOS36 MOS36 0267 DC7E ^20 MOS36 0241 DC69 MOS36 0267 DC7E ^20 MOS36 0242 DC69 MOS36 0267 DC7E ^20 MOS36 0243 DC69 TDRE ;Tx interrupt MOS36 0267 DC7E ^20 MOS36 0244 DC69 ; MOS36 0267 DC7E ^20 MOS36 0245 DC69 ; RS423 is not claimed by CFS, so we are either MOS36 0267 DC7E ^20 MOS36 0246 DC69 ; writing or printing to RS423 MOS36 0267 DC7E ^20 MOS36 0247 DC69 ; MOS36 0267 DC7E ^20 MOS36 0248 DC69 ; extract character from RS423 Tx buffer MOS36 0267 DC7E ^20 MOS36 0249 DC69 ; MOS36 0267 DC7E ^20 MOS36 0250 DC69 A2 02 LDXIM BRSO MOS36 0267 DC7E ^20 MOS36 0251 DC6B 20 D8 E4 JSR REMOV MOS36 0267 DC7E ^20 MOS36 0252 DC6E 90 10 BCC TXCH ;[character to transmit] MOS36 0267 DC7E ^20 MOS36 0253 DC70 ; X=BRSO MOS36 0267 DC7E ^20 MOS36 0254 DC70 ; MOS36 0267 DC7E ^20 MOS36 0255 DC70 ; check for print to RS423 MOS36 0267 DC7E ^20 MOS36 0256 DC70 ; MOS36 0267 DC7E ^20 MOS36 0257 DC70 AD 85 02 LDA PRNTSW MOS36 0267 DC7E ^20 MOS36 0258 DC73 C9 02 CMPIM PRS MOS36 0267 DC7E ^20 MOS36 0259 DC75 D0 A9 BNE TXDINT ;[RS423 printer not selected] MOS36 0267 DC7E ^20 MOS36 0260 DC77 ; X=BRSO MOS36 0267 DC7E ^20 MOS36 0261 DC77 ; MOS36 0267 DC7E ^20 MOS36 0262 DC77 ; remove possible character from print buffer MOS36 0267 DC7E ^20 MOS36 0263 DC77 ; MOS36 0267 DC7E ^20 MOS36 0264 DC77 E8 INX ;X = BRSO+1 = BPRNT MOS36 0267 DC7E ^20 MOS36 0265 DC78 20 D8 E4 JSR REMOV ;remove character from printer buffer MOS36 0267 DC7E ^20 MOS36 0266 DC7B 6E D2 02 ROR PFLAG ;update printer flag MOS36 0267 DC7E ^20 MOS36 0267 DC7E 30 A0 BMI TXDINT ;[no character to print] MOS36 0292 DC93 ^20 MOS36 0268 DC80 ; MOS36 0292 DC93 ^20 MOS36 0269 DC80 TXCH ;transmit character in A MOS36 0292 DC93 ^20 MOS36 0270 DC80 ; MOS36 0292 DC93 ^20 MOS36 0271 DC80 8D 09 FE STA RSDATA ;transmit character MOS36 0292 DC93 ^20 MOS36 0272 DC83 ; MOS36 0292 DC93 ^20 MOS36 0273 DC83 ; set RS423 printer timeout active MOS36 0292 DC93 ^20 MOS36 0274 DC83 ; MOS36 0292 DC93 ^20 MOS36 0275 DC83 A9 E7 LDAIM PTIMUT MOS36 0292 DC93 ^20 MOS36 0276 DC85 85 EA STA RSTUT MOS36 0292 DC93 ^20 MOS36 0277 DC87 ; MOS36 0292 DC93 ^20 MOS36 0278 DC87 MOS36 0292 DC93 ^20 MOS36 0279 DC87 RTS68 MOS36 0292 DC93 ^20 MOS36 0280 DC87 UNK0 MOS36 0292 DC93 ^20 MOS36 0281 DC87 60 RTS ;return from interrupt MOS36 0292 DC93 ^20 MOS36 0282 DC88 MOS36 0292 DC93 ^20 MOS36 0283 DC88 MOS36 0292 DC93 ^20 MOS36 0284 DC88 NOTCFS ;RS423 not managed by CFS MOS36 0292 DC93 ^20 MOS36 0285 DC88 ; MOS36 0292 DC93 ^20 MOS36 0286 DC88 2D 78 02 AND C6850 ;suppress bits according to user tastes MOS36 0292 DC93 ^20 MOS36 0287 DC8B 4A LSRA ;C=Rx MOS36 0292 DC93 ^20 MOS36 0288 DC8C 90 07 BCC NOTRX ;[not Rx int] MOS36 0292 DC93 ^20 MOS36 0289 DC8E 70 05 BVS NOTRX ;[do not allow Rx by polling] MOS36 0292 DC93 ^20 MOS36 0290 DC90 ; MOS36 0292 DC93 ^20 MOS36 0291 DC90 AC 50 02 LDY RSCTFL MOS36 0292 DC93 ^20 MOS36 0292 DC93 30 A0 BMI RX68 ;[recieve interrupts enabled] MOS36 0206 DC51 v22 MOS36 0293 DC95 ; MOS36 0206 DC51 v22 MOS36 0294 DC95 NOTRX MOS36 0206 DC51 v22 MOS36 0295 DC95 4A LSRA ;C=Tx, N=Rx MOS36 0206 DC51 v22 MOS36 0296 DC96 6A RORA ;C=DCD, N=Tx MOS36 0206 DC51 v22 MOS36 0297 DC97 B0 C4 BCS MDCD ;[DCD interrupt] MOS36 0206 DC51 v22 MOS36 0298 DC99 ; MOS36 0206 DC51 v22 MOS36 0299 DC99 30 CE BMI TDRE ;[TDRE] MOS36 0206 DC51 v22 MOS36 0300 DC9B ; MOS36 0206 DC51 v22 MOS36 0301 DC9B 70 EA BVS RTS68 ;[timer interrupt entry] MOS36 0206 DC51 v22 MOS36 0302 DC9D ; MOS36 0206 DC51 v22 MOS36 0303 DC9D ; not timer interrupt entry MOS36 0206 DC51 v22 MOS36 0304 DC9D ; MOS36 0206 DC51 v22 MOS36 0305 DC9D UNKIRQ ;unknown interrupt MOS36 0206 DC51 v22 MOS36 0306 DC9D ; MOS36 0206 DC51 v22 MOS36 0307 DC9D A2 05 LDXIM SVINT MOS36 0415 DD02 ^19 MOS36 0308 DC9F 20 71 F1 JSR SVOP ;allow FS ROMs to process interrupt MOS36 0415 DD02 ^19 MOS36 0309 DCA2 F0 E3 BEQ UNK0 ;[service ROM dealt with interrupt] MOS36 0415 DD02 ^19 MOS36 0310 DCA4 ; MOS36 0415 DD02 ^19 MOS36 0311 DCA4 ; pull return address MOS36 0415 DD02 ^19 MOS36 0312 DCA4 ; MOS36 0415 DD02 ^19 MOS36 0313 DCA4 68 PLA MOS36 0415 DD02 ^19 MOS36 0314 DCA5 68 PLA MOS36 0415 DD02 ^19 MOS36 0315 DCA6 ; MOS36 0415 DD02 ^19 MOS36 0316 DCA6 ; restore X and Y for user interrupt routine MOS36 0415 DD02 ^19 MOS36 0317 DCA6 ; MOS36 0415 DD02 ^19 MOS36 0318 DCA6 68 PLA MOS36 0415 DD02 ^19 MOS36 0319 DCA7 A8 TAY MOS36 0415 DD02 ^19 MOS36 0320 DCA8 68 PLA MOS36 0415 DD02 ^19 MOS36 0321 DCA9 AA TAX MOS36 0415 DD02 ^19 MOS36 0322 DCAA 68 PLA MOS36 0415 DD02 ^19 MOS36 0323 DCAB 85 FC STA TEMPA MOS36 0415 DD02 ^19 MOS36 0324 DCAD 6C 06 02 JMI IRQVEC ;assume that user will clear the interrupt MOS36 0415 DD02 ^19 MOS36 0325 DCB0 ; (defaults to IRQTWO) MOS36 0415 DD02 ^19 MOS36 0326 DCB0 MOS36 0415 DD02 ^19 MOS36 0327 DCB0 MOS36 0415 DD02 ^19 MOS36 0328 DCB0 MOS36 0415 DD02 ^19 MOS36 0329 DCB0 IRQA ;check for interrupt from primary 6522 MOS36 0415 DD02 ^19 MOS36 0330 DCB0 ; MOS36 0415 DD02 ^19 MOS36 0331 DCB0 AD 4D FE LDA IFRQ ;A = IFR [IRQ,TIMER1,TIMER2,CB1,CB2,SHIFTREG,CA1,CA2] MOS36 0415 DD02 ^19 MOS36 0332 DCB3 10 3A BPL IRQB ;[not a VIAA interrupt] MOS36 0415 DD02 ^19 MOS36 0333 DCB5 ; MOS36 0415 DD02 ^19 MOS36 0334 DCB5 ; MOS36 0415 DD02 ^19 MOS36 0335 DCB5 2D 79 02 AND A6522 ;suppress bits according to user tastes MOS36 0415 DD02 ^19 MOS36 0336 DCB8 2D 4E FE AND IERQ ;N.B. only look at enabled interrupts MOS36 0415 DD02 ^19 MOS36 0337 DCBB ; MOS36 0415 DD02 ^19 MOS36 0338 DCBB ; MOS36 0415 DD02 ^19 MOS36 0339 DCBB 6A RORA ;A = IFR >> 1 MOS36 0415 DD02 ^19 MOS36 0340 DCBC 6A RORA ;A = IFR >> 2, C = CA1, N = CA2 MOS36 0415 DD02 ^19 MOS36 0341 DCBD 90 52 BCC ITIME2 ;[not VSYNC interrupt] MOS36 0415 DD02 ^19 MOS36 0342 DCBF ; MOS36 0415 DD02 ^19 MOS36 0343 DCBF ; VSYNC interrupt MOS36 0415 DD02 ^19 MOS36 0344 DCBF ; N.B. C=1 MOS36 0415 DD02 ^19 MOS36 0345 DCBF ; MOS36 0415 DD02 ^19 MOS36 0346 DCBF CE 40 02 DEC CYCLE ;update CFS timeout byte MOS36 0415 DD02 ^19 MOS36 0347 DCC2 A5 EA LDA RSTUT ;decrement RS423 printer timeout MOS36 0415 DD02 ^19 MOS36 0348 DCC4 10 02 BPL NPRST MOS36 0415 DD02 ^19 MOS36 0349 DCC6 E6 EA INC RSTUT MOS36 0415 DD02 ^19 MOS36 0350 DCC8 ; MOS36 0415 DD02 ^19 MOS36 0351 DCC8 NPRST ;no RS423 printer timeout MOS36 0415 DD02 ^19 MOS36 0352 DCC8 ; MOS36 0415 DD02 ^19 MOS36 0353 DCC8 AD 51 02 LDA FLCNT MOS36 0415 DD02 ^19 MOS36 0354 DCCB F0 18 BEQ IVS1 ;[flash disabled] MOS36 0415 DD02 ^19 MOS36 0355 DCCD CE 51 02 DEC FLCNT MOS36 0415 DD02 ^19 MOS36 0356 DCD0 D0 13 BNE IVS1 ;[flash count not exhausted] MOS36 0415 DD02 ^19 MOS36 0357 DCD2 ; MOS36 0415 DD02 ^19 MOS36 0358 DCD2 ; flash count exhausted MOS36 0415 DD02 ^19 MOS36 0359 DCD2 ; reset FLCNT MOS36 0415 DD02 ^19 MOS36 0360 DCD2 ; MOS36 0415 DD02 ^19 MOS36 0361 DCD2 [ MOS125 = &FF MOS36 MOS36 MOS36 MOS36 Acorn macro assembler Page 66 MOS36 IRQ processing MOS36 MOS36 0415 DD02 ^19 MOS36 0372 DCD2 | MOS36 0415 DD02 ^19 MOS36 0373 DCD2 ; A=1 MOS36 0415 DD02 ^19 MOS36 0374 DCD2 AE 52 02 LDX FLSPC MOS36 0415 DD02 ^19 MOS36 0375 DCD5 4D 48 02 EOR VPREGA ;invert flash bit MOS36 0415 DD02 ^19 MOS36 0376 DCD8 4A LSRA ;C = new flash bit MOS36 0415 DD02 ^19 MOS36 0377 DCD9 B0 03 BCS FLASH1 ;[old flash bit = 0] MOS36 0415 DD02 ^19 MOS36 0378 DCDB ; old flash bit = 1 MOS36 0415 DD02 ^19 MOS36 0379 DCDB AE 53 02 LDX FLMRK MOS36 0415 DD02 ^19 MOS36 0380 DCDE FLASH1 MOS36 0415 DD02 ^19 MOS36 0381 DCDE ; MOS36 0415 DD02 ^19 MOS36 0382 DCDE 2A ROLA ;A = VPREGA MOS36 0415 DD02 ^19 MOS36 0383 DCDF ] MOS36 0415 DD02 ^19 MOS36 0384 DCDF 20 29 EA JSR MVPRC0 ;update video processor and register image MOS36 0415 DD02 ^19 MOS36 0385 DCE2 8E 51 02 STX FLCNT ;update flash count MOS36 0415 DD02 ^19 MOS36 0386 DCE5 ; MOS36 0415 DD02 ^19 MOS36 0387 DCE5 IVS1 MOS36 0415 DD02 ^19 MOS36 0388 DCE5 A0 04 LDYIM EVVSYN MOS36 0415 DD02 ^19 MOS36 0389 DCE7 20 0C E5 JSR EVENT MOS36 0415 DD02 ^19 MOS36 0390 DCEA ; MOS36 0415 DD02 ^19 MOS36 0391 DCEA A9 02 LDAIM VSYNC MOS36 0415 DD02 ^19 MOS36 0392 DCEC 4C 16 DE JMP IVIAA0 ;clear interrupt and return MOS36 0415 DD02 ^19 MOS36 0393 DCEF MOS36 0415 DD02 ^19 MOS36 0394 DCEF MOS36 0415 DD02 ^19 MOS36 0395 DCEF MOS36 0415 DD02 ^19 MOS36 0396 DCEF IRQB ;check for interrupt from secondary 6522 MOS36 0415 DD02 ^19 MOS36 0397 DCEF ; MOS36 0415 DD02 ^19 MOS36 0398 DCEF AD 6D FE LDA IFRR ;A = IFR, C = ?, N = IRQ MOS36 0415 DD02 ^19 MOS36 0399 DCF2 10 A9 BPL UNKIRQ ;[not a VIAB interrupt] MOS36 0415 DD02 ^19 MOS36 0400 DCF4 ; MOS36 0415 DD02 ^19 MOS36 0401 DCF4 ; MOS36 0415 DD02 ^19 MOS36 0402 DCF4 2D 77 02 AND B6522 ;suppress bits if secondary 6522 not present MOS36 0415 DD02 ^19 MOS36 0403 DCF7 2D 6E FE AND IERR ;only look at enabled interrupts MOS36 0415 DD02 ^19 MOS36 0404 DCFA 6A RORA ;A = IFR >> 1 MOS36 0415 DD02 ^19 MOS36 0405 DCFB 6A RORA ;A = IFR >> 2, C = CA1 MOS36 0415 DD02 ^19 MOS36 0406 DCFC 90 9F BCC UNKIRQ ;[not a printer interrupt] MOS36 0415 DD02 ^19 MOS36 0407 DCFE ; MOS36 0415 DD02 ^19 MOS36 0408 DCFE IPRNT ;printer interrupt MOS36 0415 DD02 ^19 MOS36 0409 DCFE ; MOS36 0415 DD02 ^19 MOS36 0410 DCFE ; acknowledge interrupt MOS36 0415 DD02 ^19 MOS36 0411 DCFE ; N.B. clear before sending next character since printer MOS36 0415 DD02 ^19 MOS36 0412 DCFE ; may acknowledge quickly and we could miss the interrupt MOS36 0415 DD02 ^19 MOS36 0413 DCFE AC 85 02 LDY PRNTSW MOS36 0415 DD02 ^19 MOS36 0414 DD01 88 DEY ;******** ASSUMES PCEN = 1 ******** MOS36 0415 DD02 ^19 MOS36 0415 DD02 D0 99 BNE UNKIRQ ;[ignore printer interrupt cos centronics not selected] MOS36 0341 DCBD v2D MOS36 0416 DD04 ; MOS36 0341 DCBD v2D MOS36 0417 DD04 A9 02 LDAIM PRNT MOS36 0341 DCBD v2D MOS36 0418 DD06 8D 6D FE STA IFRR ;acknowledge interrupt MOS36 0341 DCBD v2D MOS36 0419 DD09 8D 6E FE STA IERR ;disable printer interrupt MOS36 0341 DCBD v2D MOS36 0420 DD0C ; (will be enabled again by STROBE if another character is sent MOS36 0341 DCBD v2D MOS36 0421 DD0C ; using the parallel port) MOS36 0341 DCBD v2D MOS36 0422 DD0C ; MOS36 0341 DCBD v2D MOS36 0423 DD0C A2 03 LDXIM BPRNT ;X := print bufferid MOS36 0341 DCBD v2D MOS36 0424 DD0E 4C D8 E1 JMP STROBE ;if character read then print it AND return from interrupt MOS36 0341 DCBD v2D MOS36 0425 DD11 MOS36 0341 DCBD v2D MOS36 0426 DD11 MOS36 0341 DCBD v2D MOS36 0427 DD11 ITIME2 ;check for TIMER2 interrupt MOS36 0341 DCBD v2D MOS36 0428 DD11 ; MOS36 0341 DCBD v2D MOS36 0429 DD11 2A ROLA ;A = IFR >> 1 -- MOS36 0430 DD12 2A ROLA ;A = IFR -- MOS36 0431 DD13 2A ROLA ;:A = IFR << 1, N = TIMER1 -- MOS36 0432 DD14 2A ROLA ;A = IFR << 2, N = TIMER2, C = TIMER1 -- MOS36 0433 DD15 10 5B BPL ITIME1 ;[not TIMER2, check for TIMER1 interrupt] MOS36 0433 DD15 v24 MOS36 0434 DD17 [ NOSP = &00 MOS36 0433 DD15 v24 MOS36 0437 DD17 | MOS36 0433 DD15 v24 MOS36 0438 DD17 ; MOS36 0433 DD15 v24 MOS36 0439 DD17 ; timer 2 interrupt MOS36 0433 DD15 v24 MOS36 0440 DD17 ; acknowledge interrupt MOS36 0433 DD15 v24 MOS36 0441 DD17 ; MOS36 0433 DD15 v24 MOS36 0442 DD17 ; and MOS36 0433 DD15 v24 MOS36 0443 DD17 ; MOS36 0433 DD15 v24 MOS36 0444 DD17 ; set speech RDY to interrupt again MOS36 0433 DD15 v24 MOS36 0445 DD17 ; MOS36 0433 DD15 v24 MOS36 0446 DD17 A9 20 LDAIM TIMER2 MOS36 0433 DD15 v24 MOS36 0447 DD19 A2 00 LDXIM ZERO MOS36 0433 DD15 v24 MOS36 0448 DD1B ; N.B. minimise time between next two instructions MOS36 0433 DD15 v24 MOS36 0449 DD1B 8D 4D FE STA IFRQ ;clear interrupt MOS36 0433 DD15 v24 MOS36 0450 DD1E 8E 49 FE STX TRCHQ ;set to interrupt on speech chip INT MOS36 0433 DD15 v24 MOS36 0451 DD21 ; MOS36 0433 DD15 v24 MOS36 0452 DD21 ; process speech request MOS36 0433 DD15 v24 MOS36 0453 DD21 ; MOS36 0433 DD15 v24 MOS36 0454 DD21 PRSPRQ ;process speech request MOS36 0433 DD15 v24 MOS36 0455 DD21 ; MOS36 0433 DD15 v24 MOS36 0456 DD21 ; set speak external repeat counter to 4 MOS36 0433 DD15 v24 MOS36 0457 DD21 ; MOS36 0433 DD15 v24 MOS36 0458 DD21 A2 08 LDXIM BSPCH MOS36 0433 DD15 v24 MOS36 0459 DD23 86 FB STX SPWK2 ;**** ASSUMES BSPCH=8 **** MOS36 0433 DD15 v24 MOS36 0460 DD25 ; MOS36 0433 DD15 v24 MOS36 0461 DD25 SPEREP ;repeat poke of speak external data MOS36 0433 DD15 v24 MOS36 0462 DD25 ; MOS36 0433 DD15 v24 MOS36 0463 DD25 ; inspect speech buffer MOS36 0433 DD15 v24 MOS36 0464 DD25 ; MOS36 0433 DD15 v24 MOS36 0465 DD25 20 D3 E4 JSR EXAM MOS36 0433 DD15 v24 MOS36 0466 DD28 ; MOS36 0433 DD15 v24 MOS36 0467 DD28 ; record buffer status - MI => dormant, PL => busy MOS36 0433 DD15 v24 MOS36 0468 DD28 ; MOS36 0433 DD15 v24 MOS36 0469 DD28 6E D7 02 ROR SPSTAT MOS36 0433 DD15 v24 MOS36 0470 DD2B 30 44 BMI NSPECH ;[buffer empty] MOS36 0433 DD15 v24 MOS36 0471 DD2D ; MOS36 0433 DD15 v24 MOS36 0472 DD2D A8 TAY MOS36 0433 DD15 v24 MOS36 0473 DD2E F0 05 BEQ SPOK ;[speak external data] MOS36 0433 DD15 v24 MOS36 0474 DD30 ; MOS36 0433 DD15 v24 MOS36 0475 DD30 ; new command - ensure not talking MOS36 0433 DD15 v24 MOS36 0476 DD30 ; MOS36 0433 DD15 v24 MOS36 0477 DD30 20 A9 EE JSR RSPECH MOS36 0433 DD15 v24 MOS36 0478 DD33 30 3C BMI NSPECH ;[talking active] MOS36 0433 DD15 v24 MOS36 0479 DD35 ; MOS36 0433 DD15 v24 MOS36 0480 DD35 ; new command and not talking MOS36 0433 DD15 v24 MOS36 0481 DD35 ; MOS36 0433 DD15 v24 MOS36 0482 DD35 SPOK ;speak external data MOS36 0433 DD15 v24 MOS36 0483 DD35 ; MOS36 0433 DD15 v24 MOS36 0484 DD35 ; get command byte from speech buffer MOS36 0433 DD15 v24 MOS36 0485 DD35 ; MOS36 0433 DD15 v24 MOS36 0486 DD35 20 D8 E4 JSR REMOV MOS36 0433 DD15 v24 MOS36 0487 DD38 ; MOS36 0433 DD15 v24 MOS36 0488 DD38 ; codeword in A MOS36 0433 DD15 v24 MOS36 0489 DD38 ; MOS36 0433 DD15 v24 MOS36 0490 DD38 85 F5 STA SEROM MOS36 0433 DD15 v24 MOS36 0491 DD3A ; MOS36 0433 DD15 v24 MOS36 0492 DD3A ; pull data MOS36 0433 DD15 v24 MOS36 0493 DD3A ; MOS36 0433 DD15 v24 MOS36 0494 DD3A 20 D8 E4 JSR REMOV MOS36 MOS36 MOS36 MOS36 Acorn macro assembler Page 67 MOS36 IRQ processing MOS36 MOS36 0433 DD15 v24 MOS36 0495 DD3D 85 F7 STA ROMPTR+&01 ;hi-address / hi-data MOS36 0433 DD15 v24 MOS36 0496 DD3F 20 D8 E4 JSR REMOV MOS36 0433 DD15 v24 MOS36 0497 DD42 85 F6 STA ROMPTR+&00 ;lo-address / lo-data MOS36 0433 DD15 v24 MOS36 0498 DD44 ; MOS36 0433 DD15 v24 MOS36 0499 DD44 ; switch on codeword MOS36 0433 DD15 v24 MOS36 0500 DD44 ; MOS36 0433 DD15 v24 MOS36 0501 DD44 A4 F5 LDY SEROM MOS36 0433 DD15 v24 MOS36 0502 DD46 F0 1B BEQ ISP2 ;[command=0, do not treat codeword as a command] MOS36 0433 DD15 v24 MOS36 0503 DD48 10 16 BPL ISP3 ;[command>0, speech command without address] MOS36 0433 DD15 v24 MOS36 0504 DD4A ; MOS36 0433 DD15 v24 MOS36 0505 DD4A ; command with address MOS36 0433 DD15 v24 MOS36 0506 DD4A ; command either speak(address) OR read-and-branch(address) MOS36 0433 DD15 v24 MOS36 0507 DD4A ; MOS36 0433 DD15 v24 MOS36 0508 DD4A ; check for read and branch request MOS36 0433 DD15 v24 MOS36 0509 DD4A ; MOS36 0433 DD15 v24 MOS36 0510 DD4A 24 F5 BIT SEROM MOS36 0433 DD15 v24 MOS36 0511 DD4C [ MOS125 = &FF MOS36 0433 DD15 v24 MOS36 0531 DD4C | MOS36 0433 DD15 v24 MOS36 0532 DD4C 50 09 BVC LADDR ;[speak(address)] MOS36 0433 DD15 v24 MOS36 0533 DD4E ;read and branch (speak indirect) MOS36 0433 DD15 v24 MOS36 0534 DD4E ; MOS36 0433 DD15 v24 MOS36 0535 DD4E ; multiply offset by two MOS36 0433 DD15 v24 MOS36 0536 DD4E ; MOS36 0433 DD15 v24 MOS36 0537 DD4E 06 F6 ASL ROMPTR+&00 MOS36 0433 DD15 v24 MOS36 0538 DD50 26 F7 ROL ROMPTR+&01 MOS36 0433 DD15 v24 MOS36 0539 DD52 ; MOS36 0433 DD15 v24 MOS36 0540 DD52 ; reselect address MOS36 0433 DD15 v24 MOS36 0541 DD52 ; MOS36 0433 DD15 v24 MOS36 0542 DD52 20 78 EE JSR SPLIND ;load address indirect (returns C=0) MOS36 0433 DD15 v24 MOS36 0543 DD55 90 03 BCC ISPX ;always branch MOS36 0433 DD15 v24 MOS36 0544 DD57 MOS36 0433 DD15 v24 MOS36 0545 DD57 LADDR MOS36 0433 DD15 v24 MOS36 0546 DD57 ; MOS36 0433 DD15 v24 MOS36 0547 DD57 ; speak(address) MOS36 0433 DD15 v24 MOS36 0548 DD57 ; load address into speech processor MOS36 0433 DD15 v24 MOS36 0549 DD57 ; MOS36 0433 DD15 v24 MOS36 0550 DD57 ; V=0 MOS36 0433 DD15 v24 MOS36 0551 DD57 20 F7 EE JSR SPLOAD ;N.B. does PHP...PLP MOS36 0433 DD15 v24 MOS36 0552 DD5A ] MOS36 0433 DD15 v24 MOS36 0553 DD5A ; MOS36 0433 DD15 v24 MOS36 0554 DD5A ISPX MOS36 0433 DD15 v24 MOS36 0555 DD5A AC 61 02 LDY SHUTSP ;command defaults to speech MOS36 0433 DD15 v24 MOS36 0556 DD5D 4C BB EE JMP WSPECH ;send command AND return MOS36 0433 DD15 v24 MOS36 0557 DD60 ; MOS36 0433 DD15 v24 MOS36 0558 DD60 ; MOS36 0433 DD15 v24 MOS36 0559 DD60 ISP3 ;treat codeword as a command MOS36 0433 DD15 v24 MOS36 0560 DD60 ; MOS36 0433 DD15 v24 MOS36 0561 DD60 20 BB EE JSR WSPECH ;issue codeword command MOS36 0433 DD15 v24 MOS36 0562 DD63 ; MOS36 0433 DD15 v24 MOS36 0563 DD63 ISP2 ;write argument data bytes MOS36 0433 DD15 v24 MOS36 0564 DD63 ; MOS36 0433 DD15 v24 MOS36 0565 DD63 A4 F6 LDY ROMPTR+&00 MOS36 0433 DD15 v24 MOS36 0566 DD65 20 BB EE JSR WSPECH MOS36 0433 DD15 v24 MOS36 0567 DD68 A4 F7 LDY ROMPTR+&01 MOS36 0433 DD15 v24 MOS36 0568 DD6A 20 BB EE JSR WSPECH MOS36 0433 DD15 v24 MOS36 0569 DD6D ; MOS36 0433 DD15 v24 MOS36 0570 DD6D ; repeat poke of speak external data up to 4 times (8 bytes) MOS36 0433 DD15 v24 MOS36 0571 DD6D ; MOS36 0433 DD15 v24 MOS36 0572 DD6D 46 FB LSR SPWK2 MOS36 0433 DD15 v24 MOS36 0573 DD6F D0 B4 BNE SPEREP ;[try poking more speak external data] MOS36 0433 DD15 v24 MOS36 0574 DD71 ; MOS36 0433 DD15 v24 MOS36 0575 DD71 NSPECH MOS36 0433 DD15 v24 MOS36 0576 DD71 60 RTS MOS36 0433 DD15 v24 MOS36 0577 DD72 ] MOS36 0433 DD15 v24 MOS36 0578 DD72 MOS36 0433 DD15 v24 MOS36 0579 DD72 MOS36 0433 DD15 v24 MOS36 0580 DD72 MOS36 0433 DD15 v24 MOS36 0581 DD72 ITIME1 ;check for TIMER1 interrupt MOS36 0433 DD15 v24 MOS36 0582 DD72 ; MOS36 0433 DD15 v24 MOS36 0583 DD72 90 7B BCC IADC ;[not TIMER1, check for ADC interrupt] MOS36 0583 DD72 v04 MOS36 0584 DD74 ; C=1 MOS36 0583 DD72 v04 MOS36 0585 DD74 ; MOS36 0583 DD72 v04 MOS36 0586 DD74 ; main clock interrupt MOS36 0583 DD72 v04 MOS36 0587 DD74 ; MOS36 0583 DD72 v04 MOS36 0588 DD74 ; clear interrupt MOS36 0583 DD72 v04 MOS36 0589 DD74 ; MOS36 0583 DD72 v04 MOS36 0590 DD74 A9 40 LDAIM CLOCK MOS36 0583 DD72 v04 MOS36 0591 DD76 8D 4D FE STA IFRQ ;acknowledge clock interrupt MOS36 0583 DD72 v04 MOS36 0592 DD79 ; C=1 MOS36 0583 DD72 v04 MOS36 0593 DD79 ; MOS36 0583 DD72 v04 MOS36 0594 DD79 ; increment absolute time MOS36 0583 DD72 v04 MOS36 0595 DD79 ; MOS36 0583 DD72 v04 MOS36 0596 DD79 AD 83 02 LDA TIMESW MOS36 0583 DD72 v04 MOS36 0597 DD7C AA TAX ;X -> current timer MOS36 0583 DD72 v04 MOS36 0598 DD7D 49 0F EORIM &0F MOS36 0583 DD72 v04 MOS36 0599 DD7F 48 PHA MOS36 0583 DD72 v04 MOS36 0600 DD80 A8 TAY ;Y -> other timer MOS36 0583 DD72 v04 MOS36 0601 DD81 ; C=1 MOS36 0583 DD72 v04 MOS36 0602 DD81 ;****SEC ;N.B. add 1 to timer MOS36 0583 DD72 v04 MOS36 0603 DD81 ; MOS36 0583 DD72 v04 MOS36 0604 DD81 IT1 MOS36 0583 DD72 v04 MOS36 0605 DD81 BD 91 02 LDAAX TIME -&01 MOS36 0583 DD72 v04 MOS36 0606 DD84 69 00 ADCIM ZERO MOS36 0583 DD72 v04 MOS36 0607 DD86 99 91 02 STAAY TIME -&01 MOS36 0583 DD72 v04 MOS36 0608 DD89 CA DEX MOS36 0583 DD72 v04 MOS36 0609 DD8A F0 03 BEQ IT2 MOS36 0583 DD72 v04 MOS36 0610 DD8C 88 DEY MOS36 0583 DD72 v04 MOS36 0611 DD8D D0 F2 BNE IT1 MOS36 0583 DD72 v04 MOS36 0612 DD8F IT2 MOS36 0583 DD72 v04 MOS36 0613 DD8F ; MOS36 0583 DD72 v04 MOS36 0614 DD8F 68 PLA MOS36 0583 DD72 v04 MOS36 0615 DD90 8D 83 02 STA TIMESW ;switch timers MOS36 0583 DD72 v04 MOS36 0616 DD93 ; MOS36 0583 DD72 v04 MOS36 0617 DD93 ; MOS36 0583 DD72 v04 MOS36 0618 DD93 A2 05 LDXIM &05 MOS36 0583 DD72 v04 MOS36 0619 DD95 IVIAA5 MOS36 0583 DD72 v04 MOS36 0620 DD95 FE 9B 02 INCAX STPW -&01 MOS36 0583 DD72 v04 MOS36 0621 DD98 D0 08 BNE IINKEY MOS36 0583 DD72 v04 MOS36 0622 DD9A CA DEX MOS36 0583 DD72 v04 MOS36 0623 DD9B D0 F8 BNE IVIAA5 MOS36 0583 DD72 v04 MOS36 0624 DD9D ; MOS36 0583 DD72 v04 MOS36 0625 DD9D ; stopwatch timeout MOS36 0583 DD72 v04 MOS36 0626 DD9D ; MOS36 0583 DD72 v04 MOS36 0627 DD9D A0 05 LDYIM EVSWCH MOS36 0583 DD72 v04 MOS36 0628 DD9F 20 0C E5 JSR EVENT MOS36 0583 DD72 v04 MOS36 0629 DDA2 ; MOS36 0583 DD72 v04 MOS36 0630 DDA2 IINKEY ;decrement INKEY counter MOS36 0583 DD72 v04 MOS36 0631 DDA2 ; MOS36 0583 DD72 v04 MOS36 0632 DDA2 AD B1 02 LDA RDCTLO MOS36 0583 DD72 v04 MOS36 0633 DDA5 D0 08 BNE IIN1 ;[just decrement lo] MOS36 0583 DD72 v04 MOS36 0634 DDA7 ; lo zero MOS36 MOS36 MOS36 MOS36 Acorn macro assembler Page 68 MOS36 IRQ processing MOS36 MOS36 0583 DD72 v04 MOS36 0635 DDA7 AD B2 02 LDA RDCTHI MOS36 0583 DD72 v04 MOS36 0636 DDAA F0 06 BEQ IIN0 ;[counter zero] MOS36 0583 DD72 v04 MOS36 0637 DDAC ; decrement lo and hi MOS36 0583 DD72 v04 MOS36 0638 DDAC CE B2 02 DEC RDCTHI MOS36 0583 DD72 v04 MOS36 0639 DDAF IIN1 ;just decrement lo MOS36 0583 DD72 v04 MOS36 0640 DDAF CE B1 02 DEC RDCTLO MOS36 0583 DD72 v04 MOS36 0641 DDB2 IIN0 ;counter zero MOS36 0583 DD72 v04 MOS36 0642 DDB2 MOS36 0583 DD72 v04 MOS36 0643 DDB2 [ $Tutu ; no sound, no speech shit wanted - nothing from this point on MOS36 0583 DD72 v04 MOS36 0647 DDB2 | MOS36 0583 DD72 v04 MOS36 0648 DDB2 ; MOS36 0583 DD72 v04 MOS36 0649 DDB2 ; MOS36 0583 DD72 v04 MOS36 0650 DDB2 ; check sound sema to ensure exclusive access to sound code MOS36 0583 DD72 v04 MOS36 0651 DDB2 ; MOS36 0583 DD72 v04 MOS36 0652 DDB2 2C CE 02 BIT SSEMA MOS36 0583 DD72 v04 MOS36 0653 DDB5 ] MOS36 0583 DD72 v04 MOS36 0654 DDB5 10 0B BPL SINUSE ;[sound software in use] MOS36 0583 DD72 v04 MOS36 0655 DDB7 ; MOS36 0583 DD72 v04 MOS36 0656 DDB7 ; sound software available MOS36 0583 DD72 v04 MOS36 0657 DDB7 ; MOS36 0583 DD72 v04 MOS36 0658 DDB7 EE CE 02 INC SSEMA ;claim sound sema MOS36 0583 DD72 v04 MOS36 0659 DDBA 58 CLI ;enable interrupts during sound processing MOS36 0583 DD72 v04 MOS36 0660 DDBB 20 A1 EB JSR SNDIRQ MOS36 0583 DD72 v04 MOS36 0661 DDBE 78 SEI ;disable interrupts after sound processing MOS36 0583 DD72 v04 MOS36 0662 DDBF CE CE 02 DEC SSEMA ;release sound sema MOS36 0583 DD72 v04 MOS36 0663 DDC2 SINUSE MOS36 0583 DD72 v04 MOS36 0664 DDC2 [ NOSP = &00 MOS36 0583 DD72 v04 MOS36 0666 DDC2 | MOS36 0583 DD72 v04 MOS36 0667 DDC2 ; MOS36 0583 DD72 v04 MOS36 0668 DDC2 ; give speech a chance MOS36 0583 DD72 v04 MOS36 0669 DDC2 ; MOS36 0583 DD72 v04 MOS36 0670 DDC2 ; check buffer MOS36 0583 DD72 v04 MOS36 0671 DDC2 ; MOS36 0583 DD72 v04 MOS36 0672 DDC2 2C D7 02 BIT SPSTAT MOS36 0583 DD72 v04 MOS36 0673 DDC5 30 0C BMI SPBUSY ;[speech buffer empty] MOS36 0583 DD72 v04 MOS36 0674 DDC7 ; MOS36 0583 DD72 v04 MOS36 0675 DDC7 ; read speech chip status MOS36 0583 DD72 v04 MOS36 0676 DDC7 ; MOS36 0583 DD72 v04 MOS36 0677 DDC7 20 A9 EE JSR RSPECH ;N.B. does not alter A if speech chip not present MOS36 0583 DD72 v04 MOS36 0678 DDCA ; MOS36 0583 DD72 v04 MOS36 0679 DDCA ; A>=$80 => busy MOS36 0583 DD72 v04 MOS36 0680 DDCA ; MOS36 0583 DD72 v04 MOS36 0681 DDCA ; N.B. if speech chip does not exist then 25% chance that PRSPRQ will MOS36 0583 DD72 v04 MOS36 0682 DDCA ; be called, this will just result in a no-operation effect MOS36 0583 DD72 v04 MOS36 0683 DDCA ; MOS36 0583 DD72 v04 MOS36 0684 DDCA 49 A0 EORIM &A0 MOS36 0583 DD72 v04 MOS36 0685 DDCC C9 60 CMPIM &60 MOS36 0583 DD72 v04 MOS36 0686 DDCE 90 03 BCC SPBUSY ;[100, 101 or 111] MOS36 0583 DD72 v04 MOS36 0687 DDD0 ; MOS36 0583 DD72 v04 MOS36 0688 DDD0 20 21 DD JSR PRSPRQ ;process speech request MOS36 0583 DD72 v04 MOS36 0689 DDD3 ] MOS36 0583 DD72 v04 MOS36 0690 DDD3 ; MOS36 0583 DD72 v04 MOS36 0691 DDD3 SPBUSY ;speech chip busy MOS36 0583 DD72 v04 MOS36 0692 DDD3 ; MOS36 0583 DD72 v04 MOS36 0693 DDD3 ; check RS423 for possible Tx MOS36 0583 DD72 v04 MOS36 0694 DDD3 ; MOS36 0583 DD72 v04 MOS36 0695 DDD3 2C 50 D9 BIT FFBYT ;indicate timer interrupt call MOS36 0583 DD72 v04 MOS36 0696 DDD6 20 4C DC JSR IRQ68 MOS36 0583 DD72 v04 MOS36 0697 DDD9 ; MOS36 0583 DD72 v04 MOS36 0698 DDD9 ; check keyboard if keys active MOS36 0583 DD72 v04 MOS36 0699 DDD9 ; MOS36 0583 DD72 v04 MOS36 0700 DDD9 A5 EC LDA CKEY MOS36 0583 DD72 v04 MOS36 0701 DDDB 05 ED ORA OKEY MOS36 0583 DD72 v04 MOS36 0702 DDDD 2D 42 02 AND KSEMA ;check for keyboard critical region MOS36 0583 DD72 v04 MOS36 0703 DDE0 F0 04 BEQ ICLK0 ;[no keys active, clear timer interrupt] MOS36 0583 DD72 v04 MOS36 0704 DDE2 38 SEC MOS36 0583 DD72 v04 MOS36 0705 DDE3 20 94 F0 JSR JMIKYV ;key(s) active, process timer interrupt MOS36 0583 DD72 v04 MOS36 0706 DDE6 ; ******** MAY ENABLE INTERRUPTS (EXITS DISABLED) ******** MOS36 0583 DD72 v04 MOS36 0707 DDE6 ; MOS36 0583 DD72 v04 MOS36 0708 DDE6 ICLK0 MOS36 0583 DD72 v04 MOS36 0709 DDE6 ; give user print routine a chance MOS36 0583 DD72 v04 MOS36 0710 DDE6 20 37 E2 JSR UPTINT MOS36 0583 DD72 v04 MOS36 0711 DDE9 ; MOS36 0583 DD72 v04 MOS36 0712 DDE9 ; the ADC is connected on CB1 MOS36 0583 DD72 v04 MOS36 0713 DDE9 ; when port B is read (by keyboard routines) any MOS36 0583 DD72 v04 MOS36 0714 DDE9 ; interrupt is lost, and the ADC must be restarted MOS36 0583 DD72 v04 MOS36 0715 DDE9 ; MOS36 0583 DD72 v04 MOS36 0716 DDE9 2C C0 FE BIT ADCCTL MOS36 0583 DD72 v04 MOS36 0717 DDEC 70 04 BVS IADCB ;[ADC not busy] MOS36 0583 DD72 v04 MOS36 0718 DDEE 60 RTS ;return from interrupt MOS36 0583 DD72 v04 MOS36 0719 DDEF MOS36 0583 DD72 v04 MOS36 0720 DDEF MOS36 0583 DD72 v04 MOS36 0721 DDEF IADC ;check for ADC interrupt MOS36 0583 DD72 v04 MOS36 0722 DDEF ; MOS36 0583 DD72 v04 MOS36 0723 DDEF 2A ROLA ;A = IFR << 3, N = CB1 MOS36 0717 DDEC v7B MOS36 0724 DDF0 10 28 BPL IKEYBD ;[not an ADC intterupt] MOS36 0724 DDF0 v57 MOS36 0725 DDF2 ; MOS36 0724 DDF0 v57 MOS36 0726 DDF2 ; ADC interrupt MOS36 0724 DDF0 v57 MOS36 0727 DDF2 ; check ADC enabled MOS36 0724 DDF0 v57 MOS36 0728 DDF2 ; MOS36 0724 DDF0 v57 MOS36 0729 DDF2 IADCB MOS36 0724 DDF0 v57 MOS36 0730 DDF2 AE 4C 02 LDX ADCHAN MOS36 0724 DDF0 v57 MOS36 0731 DDF5 F0 1D BEQ IADC0 ;[ADC disabled] MOS36 0724 DDF0 v57 MOS36 0732 DDF7 ; MOS36 0724 DDF0 v57 MOS36 0733 DDF7 ; read conversion lo byte MOS36 0724 DDF0 v57 MOS36 0734 DDF7 ; MOS36 0724 DDF0 v57 MOS36 0735 DDF7 AD C2 FE LDA ADCLO MOS36 0724 DDF0 v57 MOS36 0736 DDFA 9D B5 02 STAAX ADCLOV -&01 MOS36 0724 DDF0 v57 MOS36 0737 DDFD ; MOS36 0724 DDF0 v57 MOS36 0738 DDFD ; read conversion hi byte MOS36 0724 DDF0 v57 MOS36 0739 DDFD ; MOS36 0724 DDF0 v57 MOS36 0740 DDFD AD C1 FE LDA ADCHI MOS36 0724 DDF0 v57 MOS36 0741 DE00 9D B9 02 STAAX ADCHIV -&01 MOS36 0724 DDF0 v57 MOS36 0742 DE03 ; MOS36 0724 DDF0 v57 MOS36 0743 DE03 ; set latest conversion number MOS36 0724 DDF0 v57 MOS36 0744 DE03 ; MOS36 0724 DDF0 v57 MOS36 0745 DE03 8E BE 02 STX ADCFLG MOS36 0724 DDF0 v57 MOS36 0746 DE06 ; MOS36 0724 DDF0 v57 MOS36 0747 DE06 ; signal ADC conversion event, X = channel number MOS36 0724 DDF0 v57 MOS36 0748 DE06 ; MOS36 0724 DDF0 v57 MOS36 0749 DE06 A0 03 LDYIM EVADC MOS36 0724 DDF0 v57 MOS36 0750 DE08 20 0C E5 JSR EVENT MOS36 0724 DDF0 v57 MOS36 0751 DE0B ; MOS36 0724 DDF0 v57 MOS36 0752 DE0B ; step to next channel MOS36 0724 DDF0 v57 MOS36 0753 DE0B ; MOS36 0724 DDF0 v57 MOS36 0754 DE0B CA DEX MOS36 0724 DDF0 v57 MOS36 0755 DE0C D0 03 BNE IADC2 ;[channel >= 1] MOS36 0724 DDF0 v57 MOS36 0756 DE0E ; MOS36 0724 DDF0 v57 MOS36 0757 DE0E ; channel counter underflow MOS36 0724 DDF0 v57 MOS36 0758 DE0E ; reload channel counter MOS36 0724 DDF0 v57 MOS36 0759 DE0E ; MOS36 MOS36 MOS36 MOS36 Acorn macro assembler Page 69 MOS36 IRQ processing MOS36 MOS36 0724 DDF0 v57 MOS36 0760 DE0E AE 4D 02 LDX MAXADC MOS36 0724 DDF0 v57 MOS36 0761 DE11 IADC2 MOS36 0724 DDF0 v57 MOS36 0762 DE11 ; MOS36 0724 DDF0 v57 MOS36 0763 DE11 ; initiate next conversion MOS36 0724 DDF0 v57 MOS36 0764 DE11 ; X = channel number MOS36 0724 DDF0 v57 MOS36 0765 DE11 ; MOS36 0724 DDF0 v57 MOS36 0766 DE11 20 42 DE JSR ADCBGX ;begin conversion, sets ADCHAN=X MOS36 0724 DDF0 v57 MOS36 0767 DE14 IADC0 MOS36 0724 DDF0 v57 MOS36 0768 DE14 A9 10 LDAIM ADC MOS36 0724 DDF0 v57 MOS36 0769 DE16 IVIAA0 ;return from VIAA interrupt MOS36 0724 DDF0 v57 MOS36 0770 DE16 8D 4D FE STA IFRQ ;clear interrupt state MOS36 0724 DDF0 v57 MOS36 0771 DE19 60 RTS ;return from interrupt MOS36 0724 DDF0 v57 MOS36 0772 DE1A MOS36 0724 DDF0 v57 MOS36 0773 DE1A MOS36 0724 DDF0 v57 MOS36 0774 DE1A IKEYBD ;keyboard interrupt check MOS36 0724 DDF0 v57 MOS36 0775 DE1A ; MOS36 0724 DDF0 v57 MOS36 0776 DE1A 2A ROLA ;A = IFR << 4 MOS36 0787 DE25 ^6F MOS36 0777 DE1B 2A ROLA ;A = IFR << 5 MOS36 0787 DE25 ^6F MOS36 0778 DE1C 2A ROLA ;A = IFR << 6 MOS36 0787 DE25 ^6F MOS36 0779 DE1D 2A ROLA ;A = IFR << 7, N = CA2 MOS36 0787 DE25 ^6F MOS36 0780 DE1E 10 07 BPL JUNKIRQ ;[not keyboard interrupt] MOS36 0787 DE25 ^6F MOS36 0781 DE20 ; MOS36 0787 DE25 ^6F MOS36 0782 DE20 ; C=0 because no VSYNC MOS36 0787 DE25 ^6F MOS36 0783 DE20 ; MOS36 0787 DE25 ^6F MOS36 0784 DE20 20 94 F0 JSR JMIKYV ;find and set up new current key (enter with C=0) MOS36 0787 DE25 ^6F MOS36 0785 DE23 ; ******** MAY ENABLE INTERRUPTS (EXITS DISABLED) ******** MOS36 0787 DE25 ^6F MOS36 0786 DE23 A9 01 LDAIM KEYBD MOS36 0787 DE25 ^6F MOS36 0787 DE25 D0 EF BNE IVIAA0 ;[ALWAYS jump] MOS36 0780 DE1E v78 MOS36 0788 DE27 ; MOS36 0780 DE1E v78 MOS36 0789 DE27 4C 9D DC JUNKIRQ JMP UNKIRQ ;IRQ not identified -- MOS36 0790 DE2A -- MOS36 0791 DE2A -- MOS36 0792 DE2A -- MOS36 0793 DE2A [ MOS125 = &FF -- MOS36 0794 DE2A | -- MOS36 0795 DE2A DEFIRQ ;default IRQ routine -- MOS36 0796 DE2A D8 CLD -- MOS36 0797 DE2B A5 FC LDA TEMPA -- MOS36 0798 DE2D 48 PHA -- MOS36 0799 DE2E 8A TXA -- MOS36 0800 DE2F 48 PHA -- MOS36 0801 DE30 98 TYA -- MOS36 0802 DE31 48 PHA -- MOS36 0803 DE32 ; -- MOS36 0804 DE32 ; schedule return from interrupt -- MOS36 0805 DE32 ; -- MOS36 0806 DE32 20 4B DC JSR VAT -- MOS36 0807 DE35 ] -- MOS36 0808 DE35 IRQ0 ;return from interrupt restoring registers -- MOS36 0809 DE35 68 PLA -- MOS36 0810 DE36 A8 TAY -- MOS36 0811 DE37 68 PLA -- MOS36 0812 DE38 AA TAX -- MOS36 0813 DE39 68 PLA -- MOS36 0814 DE3A 85 FC STA TEMPA -- MOS36 0815 DE3C ; -- MOS36 0816 DE3C IRQTWO -- MOS36 0817 DE3C A5 FC LDA TEMPA -- MOS36 0818 DE3E 40 RTI -- MOS36 0819 DE3F -- MOS36 0820 DE3F -- MOS36 0821 DE3F ADCBEG ;begin forced ADC conversion -- MOS36 0822 DE3F ; -- MOS36 0823 DE3F ; X = external channel number -- MOS36 0824 DE3F ; Y = 0 -- MOS36 0825 DE3F ; -- MOS36 0826 DE3F 8C BE 02 STY ADCFLG ;clear conversion number -- MOS36 0827 DE42 ; -- MOS36 0828 DE42 ADCBGX ;begin ADC conversion -- MOS36 0829 DE42 ; -- MOS36 0830 DE42 ; X = external channel number -- MOS36 0831 DE42 ; Y corrupted -- MOS36 0832 DE42 ; -- MOS36 0833 DE42 E0 05 CPXIM NADC +&01 -- MOS36 0834 DE44 90 02 BCC ADCBG1 ;[valid channel number] MOS36 0834 DE44 v7D MOS36 0835 DE46 A2 04 LDXIM NADC ;force valid channel number MOS36 0834 DE44 v7D MOS36 0836 DE48 ADCBG1 ;channel number now valid (but possibly 0) MOS36 0834 DE44 v7D MOS36 0837 DE48 ; MOS36 0834 DE44 v7D MOS36 0838 DE48 8E 4C 02 STX ADCHAN -- MOS36 0839 DE4B AC 4E 02 LDY ADCCNV ;normally 0, 8 or 12 (0 has same effect as 12) -- MOS36 0840 DE4E 88 DEY -- MOS36 0841 DE4F 98 TYA -- MOS36 0842 DE50 29 08 ANDIM &08 ;extract conversion type -- MOS36 0843 DE52 18 CLC -- MOS36 0844 DE53 6D 4C 02 ADC ADCHAN -- MOS36 0845 DE56 ; C=0 -- MOS36 0846 DE56 E9 00 SBCIM ZERO ;subtract 1, add in INTERNAL channel number (1->0 ... 4->3) -- MOS36 0847 DE58 8D C0 FE STA ADCCTL ;start conversion -- MOS36 0848 DE5B ; -- MOS36 0849 DE5B ; if X was 0 on entry then a conversion is initiated on channel 3 -- MOS36 0850 DE5B ; of the opposite conversion type to that expected, but the result -- MOS36 0851 DE5B ; of this conversion will be ignored -- MOS36 0852 DE5B ; -- MOS36 0853 DE5B 60 RTS -- MOS36 0854 DE5C -- MOS36 0855 DE5C -- MOS36 0856 DE5C WRSTR ;write string -- MOS36 0857 DE5C ; -- MOS36 0858 DE5C A9 C3 LDAIM /MSG -- MOS36 0859 DE5E WRSTRA -- MOS36 0860 DE5E 85 FE STA REPTR +&01 -- MOS36 0861 DE60 A9 00 LDAIM ZERO -- MOS36 0862 DE62 85 FD STA REPTR +&00 -- MOS36 0863 DE64 WRSTR1 -- MOS36 0864 DE64 C8 INY MOS36 0868 DE6B ^77 MOS36 0865 DE65 B1 FD LDAIY REPTR MOS36 0868 DE6B ^77 MOS36 0866 DE67 20 E3 FF JSR OSASCI ;write message character MOS36 0868 DE6B ^77 MOS36 0867 DE6A AA TAX MOS36 0868 DE6B ^77 MOS36 0868 DE6B D0 F7 BNE WRSTR1 ;[ALWAYS jump, step to next message character] -- MOS36 0869 DE6D ; terminator found -- MOS36 0870 DE6D 60 RTS -- MOS36 0871 DE6E -- MOS36 0872 DE6E -- MOS36 0873 DE6E LNK MOS38 -- MOS38 0001 DE6E ; > MOS38 -- MOS38 0002 DE6E TTL MOS38 CLI -- MOS38 0003 DE6E OPT MOS38 MOS38 MOS38 MOS38 MOS38 Acorn macro assembler Page 70 MOS38 MOS38 CLI MOS38 -- MOS38 0004 DE6E ;(c) 1981 ACORN -- MOS38 0005 DE6E ;BBC MOS -- MOS38 0006 DE6E ;Change record: -- MOS38 0007 DE6E ;004 29-Jul-81 MP Prototype version -- MOS38 0008 DE6E ;Author(s): -- MOS38 0009 DE6E ;PB Paul Bond -- MOS38 0010 DE6E ;MP Mike Prees -- MOS38 0011 DE6E -- MOS38 0012 DE6E -- MOS38 0013 DE6E ; RDCH -- MOS38 0014 DE6E INKEY -- MOS38 0015 DE6E 8E B1 02 STX RDCTLO ;set INKEY counter -- MOS38 0016 DE71 8C B2 02 STY RDCTHI -- MOS38 0017 DE74 A9 FF LDAIM &FF ;indicate INKEY operational -- MOS38 0018 DE76 D0 02 BNE RDCH5 ;[ALWAYS JUMP] MOS38 0018 DE76 v7D MOS38 0019 DE78 RDCH ;default OSRDCH MOS38 0018 DE76 v7D MOS38 0020 DE78 A9 00 LDAIM ZERO ;indicate not INKEY MOS38 0018 DE76 v7D MOS38 0021 DE7A RDCH5 MOS38 0018 DE76 v7D MOS38 0022 DE7A 85 E6 STA RDCTEM -- MOS38 0023 DE7C ; save X and Y -- MOS38 0024 DE7C 8A TXA -- MOS38 0025 DE7D 48 PHA -- MOS38 0026 DE7E 98 TYA -- MOS38 0027 DE7F 48 PHA -- MOS38 0028 DE80 ; check for exec file -- MOS38 0029 DE80 AC 56 02 LDY EXECH -- MOS38 0030 DE83 F0 15 BEQ RDCHQ ;[no exec file] MOS38 0030 DE83 v6A MOS38 0031 DE85 ; MOS38 0030 DE83 v6A MOS38 0032 DE85 38 SEC MOS38 0030 DE83 v6A MOS38 0033 DE86 66 EB ROR ESSEMA ;enter critical region MOS38 0030 DE83 v6A MOS38 0034 DE88 20 D7 FF JSR OSBGET ;get a byte from exec file MOS38 0030 DE83 v6A MOS38 0035 DE8B [ MOS125 = &FF MOS38 0030 DE83 v6A MOS38 0040 DE8B | MOS38 0030 DE83 v6A MOS38 0041 DE8B 66 EB ROR ESSEMA ;exit critical region MOS38 0030 DE83 v6A MOS38 0042 DE8D 18 CLC MOS38 0030 DE83 v6A MOS38 0043 DE8E 10 27 BPL RDCH3 ;[return character] MOS38 0043 DE8E v58 MOS38 0044 DE90 ] MOS38 0043 DE8E v58 MOS38 0045 DE90 ; MOS38 0043 DE8E v58 MOS38 0046 DE90 ; end of exec file: close exec file MOS38 0043 DE8E v58 MOS38 0047 DE90 ; Y = handle MOS38 0043 DE8E v58 MOS38 0048 DE90 A9 00 LDAIM ZERO MOS38 0043 DE8E v58 MOS38 0049 DE92 [ MOS125 = &FF MOS38 0043 DE8E v58 MOS38 0050 DE92 | MOS38 0043 DE8E v58 MOS38 0051 DE92 85 EB STA ESSEMA ;exit critical region MOS38 0043 DE8E v58 MOS38 0052 DE94 ] MOS38 0043 DE8E v58 MOS38 0053 DE94 8D 56 02 STA EXECH ;cancel exec file handle MOS38 0043 DE8E v58 MOS38 0054 DE97 20 CE FF JSR OSFIND ;close exec file MOS38 0043 DE8E v58 MOS38 0055 DE9A RDCHQ ;read character MOS38 0043 DE8E v58 MOS38 0056 DE9A 24 FF BIT ESCFLG MOS38 0043 DE8E v58 MOS38 0057 DE9C 30 16 BMI RDCH1 ;[ESCAPE detected] MOS38 0043 DE8E v58 MOS38 0058 DE9E ; MOS38 0043 DE8E v58 MOS38 0059 DE9E AE 41 02 LDX RDCHSW ;set to read ch from selected buffer MOS38 0043 DE8E v58 MOS38 0060 DEA1 20 EE E5 JSR RDCHG ;get ch from kybd input buffer MOS38 0043 DE8E v58 MOS38 0061 DEA4 90 11 BCC RDCHN ;[character available] MOS38 0043 DE8E v58 MOS38 0062 DEA6 ; MOS38 0043 DE8E v58 MOS38 0063 DEA6 ; C=1 MOS38 0043 DE8E v58 MOS38 0064 DEA6 ; MOS38 0043 DE8E v58 MOS38 0065 DEA6 24 E6 BIT RDCTEM MOS38 0043 DE8E v58 MOS38 0066 DEA8 50 F0 BVC RDCHQ ;[INKEY not operational] MOS38 0043 DE8E v58 MOS38 0067 DEAA ; MOS38 0043 DE8E v58 MOS38 0068 DEAA AD B1 02 LDA RDCTLO MOS38 0043 DE8E v58 MOS38 0069 DEAD 0D B2 02 ORA RDCTHI MOS38 0043 DE8E v58 MOS38 0070 DEB0 D0 E8 BNE RDCHQ ;[INKEY counter <> 0] MOS38 0043 DE8E v58 MOS38 0071 DEB2 ; MOS38 0043 DE8E v58 MOS38 0072 DEB2 ;INKEY count exhausted MOS38 0043 DE8E v58 MOS38 0073 DEB2 ; MOS38 0043 DE8E v58 MOS38 0074 DEB2 B0 05 BCS RDCH2 ;[ALWAYS jump, return A=$FF, C=1] MOS38 0043 DE8E v58 MOS38 0075 DEB4 ; MOS38 0043 DE8E v58 MOS38 0076 DEB4 RDCH1 ;ESCAPE detected MOS38 0043 DE8E v58 MOS38 0077 DEB4 38 SEC ;indicate escape detected MOS38 0043 DE8E v58 MOS38 0078 DEB5 A9 1B LDAIM ESC MOS38 0043 DE8E v58 MOS38 0079 DEB7 RDCHN ;C=0 => 'real' character MOS38 0043 DE8E v58 MOS38 0080 DEB7 RDCH3 ;C=1 => escape detected OR INKEY count expired MOS38 0043 DE8E v58 MOS38 0081 DEB7 85 E6 STA RDCTEM ;save character read MOS38 0074 DEB2 v7A MOS38 0082 DEB9 RDCH2 ;entry point used when INKEY count exhausted (N.B. RDCTEM=$FF) MOS38 0074 DEB2 v7A MOS38 0083 DEB9 68 PLA ;restore X and Y -- MOS38 0084 DEBA A8 TAY -- MOS38 0085 DEBB 68 PLA -- MOS38 0086 DEBC AA TAX -- MOS38 0087 DEBD A5 E6 LDA RDCTEM ;A := character -- MOS38 0088 DEBF 60 RTS -- MOS38 0089 DEC0 [ MOS125 = &FF -- MOS38 0365 DEC0 ] -- MOS38 0366 DEC0 -- MOS38 0367 DEC0 [ MOS125 = &FF -- MOS38 0368 DEC0 | -- MOS38 0369 DEC0 ;START OF MOS 1.25 -- MOS38 0370 DEC0 ; COPYR had been anchored here for fear that CLISKP -- MOS38 0371 DEC0 ; would be entered with X<2; this is now ruled out -- MOS38 0372 DEC0 ; but instead end-of-table marker must be within -- MOS38 0373 DEC0 ; 253 bytes of COMTAB -- MOS38 0374 DEC0 ; command level interpreter -- MOS38 0375 DEC0 COMTAB ;table of MOS commands -- MOS38 0376 DEC0 ; this table uses the fact that all routine address hi-bytes -- MOS38 0377 DEC0 ; will have the top bit set -- MOS38 0378 DEC0 ; N.B. addresses are stored hi-byte followed by lo-byte -- MOS38 0379 DEC0 ; hi-byte is assumed to be >=$80 -- MOS38 0380 DEC0 ; code following address is A reg on entry to address -- MOS38 0381 DEC0 ; A+ => enter with XY -> line -- MOS38 0382 DEC0 ; A- => enter with Y = offset -- MOS38 0383 DEC0 -- MOS38 0384 DEC0 ; CAT -- MOS38 0385 DEC0 ;must come first to trap *. -- MOS38 0386 DEC0 43 41 54 = "CAT" -- MOS38 0387 DEC3 E0 A8 & /JMIFSC -- MOS38 0388 DEC5 05 = FSCAT ;enter with XY -> line -- MOS38 0389 DEC6 -- MOS38 0390 DEC6 ; FX -- MOS38 0391 DEC6 ;second entry in OS 1.20. -- MOS38 0392 DEC6 ;some naughty code might rely on the same quick response -- MOS38 0393 DEC6 ;but we also want to give fast access to USERV (*FX136) -- MOS38 0394 DEC6 ;and match early due to the sheer volume of calls -- MOS38 0395 DEC6 46 58 = "FX" -- MOS38 0396 DEC8 E3 A0 & /FX -- MOS38 0397 DECA FF = &FF ;enter with Y = offset -- MOS38 0398 DECB -- MOS38 0399 DECB ; CODE -- MOS38 0400 DECB ;match after FX to take less time than *FX136 -- MOS38 0401 DECB 43 4F 44 = "CODE" -- MOS38 0402 DECF E3 A6 & /FXN -- MOS38 0403 DED1 88 = FXCODE ;enter with Y = offset MOS38 MOS38 MOS38 MOS38 Acorn macro assembler Page 71 MOS38 MOS38 CLI MOS38 -- MOS38 0404 DED2 -- MOS38 0405 DED2 ; LOAD -- MOS38 0406 DED2 ;must come before LINE to trap *L. -- MOS38 0407 DED2 4C 4F 41 = "LOAD" -- MOS38 0408 DED6 E2 CC & /LOAD -- MOS38 0409 DED8 -- MOS38 0410 DED8 00 = &00 ;enter with XY -> line -- MOS38 0411 DED9 -- MOS38 0412 DED9 ; LINE -- MOS38 0413 DED9 ;needs fast service the most as user code may be time critical -- MOS38 0414 DED9 ;the only (trivial) way to pass a string from parasite to USERV -- MOS38 0415 DED9 4C 49 4E = "LINE" -- MOS38 0416 DEDD E6 CE & /JMIUSR -- MOS38 0417 DEDF 01 = &01 ;enter with A=$01, XY -> line, C=0 -- MOS38 0418 DEE0 -- MOS38 0419 DEE0 ; default if first character is not alpha, |, . or / -- MOS38 0420 DEE0 ;filter the wordless *commands off early -- MOS38 0421 DEE0 ;a substitute for testing the first char in code -- MOS38 0422 DEE0 [ MOS125 = &7F -- MOS38 0423 DEE0 [ STARGO = &00 -- MOS38 0424 DEE0 E0 A1 & /JMICMD -- MOS38 0425 DEE2 | -- MOS38 0427 DEE2 ] -- MOS38 0428 DEE2 | -- MOS38 0430 DEE2 ] -- MOS38 0431 DEE2 03 = FSNAME ;enter with XY -> line -- MOS38 0432 DEE3 -- MOS38 0433 DEE3 ; RUN -- MOS38 0434 DEE3 ;must come before ROM to trap *R. -- MOS38 0435 DEE3 ;should be as fast as *wordless to have equal advantage -- MOS38 0436 DEE3 52 55 4E = "RUN" -- MOS38 0437 DEE6 [ MOS125 = &7F -- MOS38 0438 DEE6 [ STARGO = &00 -- MOS38 0439 DEE6 E0 A1 & /JMICMD -- MOS38 0440 DEE8 | -- MOS38 0442 DEE8 ] -- MOS38 0443 DEE8 | -- MOS38 0445 DEE8 ] -- MOS38 0446 DEE8 -- MOS38 0447 DEE8 04 = FSRUN ;enter with XY -> line -- MOS38 0448 DEE9 -- MOS38 0449 DEE9 ; OPT -- MOS38 0450 DEE9 ;part of a program's operation, has high priority -- MOS38 0451 DEE9 4F 50 54 = "OPT" -- MOS38 0452 DEEC E3 A6 & /FXN -- MOS38 0453 DEEE -- MOS38 0454 DEEE 8B = FXOPT ;enter with Y = offset -- MOS38 0455 DEEF -- MOS38 0456 DEEF ; EXEC -- MOS38 0457 DEEF ;slow but provides the computer with work, should not hold it up -- MOS38 0458 DEEF 45 58 45 = "EXEC" -- MOS38 0459 DEF3 F6 C7 & /EXEC -- MOS38 0460 DEF5 -- MOS38 0461 DEF5 00 = ZERO ;enter with XY -> line -- MOS38 0462 DEF6 -- MOS38 0463 DEF6 ; MOTOR -- MOS38 0464 DEF6 ;a quick command but not urgent coming through OSCLI -- MOS38 0465 DEF6 4D 4F 54 = "MOTOR" -- MOS38 0466 DEFB E3 A6 & /FXN -- MOS38 0467 DEFD -- MOS38 0468 DEFD 89 = FXMOTR ;enter with Y = offset -- MOS38 0469 DEFE -- MOS38 0470 DEFE ; SAVE -- MOS38 0471 DEFE ;must come before SPOOL to trap *S. -- MOS38 0472 DEFE ;a slow command and rarer than loading -- MOS38 0473 DEFE 53 41 56 = "SAVE" -- MOS38 0474 DF02 E2 CE & /SAVE -- MOS38 0475 DF04 -- MOS38 0476 DF04 00 = ZERO ;enter with XY -> line -- MOS38 0477 DF05 -- MOS38 0478 DF05 ; SPOOL -- MOS38 0479 DF05 ;also slow and rarer than saving -- MOS38 0480 DF05 53 50 4F = "SPOOL" -- MOS38 0481 DF0A E3 11 & /SPOOL -- MOS38 0482 DF0C -- MOS38 0483 DF0C 00 = ZERO ;enter with XY -> line -- MOS38 0484 DF0D -- MOS38 0485 DF0D ; KEY -- MOS38 0486 DF0D ;low volume, called by programs at setup -- MOS38 0487 DF0D 4B 45 59 = "KEY" -- MOS38 0488 DF10 E3 D5 & /KEY -- MOS38 0489 DF12 -- MOS38 0490 DF12 FF = &FF ;enter with Y = offset -- MOS38 0491 DF13 -- MOS38 0492 DF13 ; TAPE -- MOS38 0493 DF13 ;must come before TV to trap *T. -- MOS38 0494 DF13 ;slightly more complex, called by programs at setup -- MOS38 0495 DF13 54 41 50 = "TAPE" -- MOS38 0496 DF17 E3 A6 & /FXN -- MOS38 0497 DF19 -- MOS38 0498 DF19 8C = FXTAPE ;enter with Y = offset -- MOS38 0499 DF1A -- MOS38 0500 DF1A ; TV -- MOS38 0501 DF1A ;cosmetic, called by programs at setup -- MOS38 0502 DF1A 54 56 = "TV" -- MOS38 0503 DF1C E3 A6 & /FXN -- MOS38 0504 DF1E -- MOS38 0505 DF1E 90 = FXTV ;enter with Y = offset -- MOS38 0506 DF1F -- MOS38 0507 DF1F ; HELP -- MOS38 0508 DF1F ;user command -- MOS38 0509 DF1F 48 45 4C = "HELP" -- MOS38 0510 DF23 F5 4E & /HELP -- MOS38 0511 DF25 -- MOS38 0512 DF25 FF = &FF ;enter with Y = offset -- MOS38 0513 DF26 -- MOS38 0514 DF26 ; ROM -- MOS38 0515 DF26 ;rarely used. as RFS installations are site-specific -- MOS38 0516 DF26 ;this is essentially a user command -- MOS38 0517 DF26 52 4F 4D = "ROM" -- MOS38 0518 DF29 E3 A6 & /FXN -- MOS38 0519 DF2B -- MOS38 0520 DF2B 8D = FXSROM ;don't care -- MOS38 0521 DF2C -- MOS38 0522 DF2C ; BASIC -- MOS38 0523 DF2C ;invokes the language (i.e. non-transient) -- MOS38 0524 DF2C ;called either by the user or in a slow *EXEC file -- MOS38 0525 DF2C 42 41 53 = "BASIC" -- MOS38 0526 DF31 E0 86 & /BASIC -- MOS38 0527 DF33 01 = &01 ;bit 0 set for ILR2 to enter ROM with C=1 -- MOS38 0528 DF34 ] MOS38 MOS38 MOS38 MOS38 Acorn macro assembler Page 72 MOS38 MOS38 CLI MOS38 -- MOS38 0529 DF34 -- MOS38 0530 DF34 [ MOS125 = &7F -- MOS38 0531 DF34 [ STARGO = &00 -- MOS38 0532 DF34 ; GOIO -- MOS38 0533 DF34 ;comes before GO to trap *G. -- MOS38 0534 DF34 47 4F 49 = "GOIO" -- MOS38 0535 DF38 DF 86 & /GOIO -- MOS38 0536 DF3A -- MOS38 0537 DF3A 80 = /LANG ;assumed -ve; stored as default jump address -- MOS38 0538 DF3B -- MOS38 0539 DF3B ; GO -- MOS38 0540 DF3B 47 4F = "GO" -- MOS38 0541 DF3D DF 87 & /GO -- MOS38 0542 DF3F -- MOS38 0543 DF3F 80 = /LANG ;assumed -ve; stored as default jump address -- MOS38 0544 DF40 -- MOS38 0545 DF40 = "" -- MOS38 0546 DF40 80 = &80 ;end of table -- MOS38 0547 DF41 -- MOS38 0548 DF41 00 00 00 % 69 ;padding -- MOS38 0549 DF86 -- MOS38 0550 DF86 [ NOSP = &00 -- MOS38 0552 DF86 ] -- MOS38 0553 DF86 -- MOS38 0554 DF86 GOIO -- MOS38 0555 DF86 38 SEC -- MOS38 0556 DF87 GO -- MOS38 0557 DF87 08 PHP -- MOS38 0558 DF88 A2 D4 LDXIM INFO +BKEXEC -FBLOCK ;stretch! -- MOS38 0559 DF8A 20 86 E2 JSR CLRFB -- MOS38 0560 DF8D 8D C3 03 STA INFO +BKEXEC +&01 ;default address = &00008000 -- MOS38 0561 DF90 20 97 E2 JSR LSA ;replace with user address if present -- MOS38 0562 DF93 28 PLP -- MOS38 0563 DF94 90 08 BCC GETENV ;if *GO then use whole address MOS38 0563 DF94 v77 MOS38 0564 DF96 A9 FF LDAIM &FF MOS38 0563 DF94 v77 MOS38 0565 DF98 8D C4 03 STA INFO +BKEXEC +&02 MOS38 0563 DF94 v77 MOS38 0566 DF9B 8D C5 03 STA INFO +BKEXEC +&03 ;else force an I/O processor address MOS38 0563 DF94 v77 MOS38 0567 DF9E GETENV MOS38 0563 DF94 v77 MOS38 0568 DF9E 20 AC E0 JSR SKIPSP ;get next argument -- MOS38 0569 DFA1 F0 07 BEQ GOTO ;if CR then point tail at it MOS38 0569 DFA1 v78 MOS38 0570 DFA3 C9 3B CMPIM ";" MOS38 0569 DFA1 v78 MOS38 0571 DFA5 D0 03 BNE GOTO ;if not semicolon then point tail at it MOS38 0569 DFA1 v78 MOS38 0572 DFA7 20 AB E0 JSR SKIPSN ;else absorb semicolon once MOS38 0569 DFA1 v78 MOS38 0573 DFAA GOTO MOS38 0569 DFA1 v78 MOS38 0574 DFAA 4C 04 F3 JMP RUNGO ;set up tail from Y and enter user code -- MOS38 0575 DFAD -- MOS38 0576 DFAD RETAIL ;return command line tail to OSARGS control block -- MOS38 0577 DFAD ;Y=high byte -- MOS38 0578 DFAD 94 01 STYZX &01 ;store in 3MSB -- MOS38 0579 DFAF AC D0 02 LDY TAILLO -- MOS38 0580 DFB2 94 00 STYZX &00 ;store low byte in MSB -- MOS38 0581 DFB4 A0 FF LDYIM &FF ;command line tail is always in I/O processor -- MOS38 0582 DFB6 94 02 STYZX &02 ;set high word to &FFFF -- MOS38 0583 DFB8 94 03 STYZX &03 -- MOS38 0584 DFBA C8 INY ;Y=0 for return -- MOS38 0585 DFBB [ TRUE = &00 -- MOS38 0586 DFBB A9 DC LDAIM SEAL ;set conventional return value (conflicting documentation) -- MOS38 0587 DFBD ] -- MOS38 0588 DFBD 60 RTS -- MOS38 0589 DFBE -- MOS38 0590 DFBE COLHEX -- MOS38 0591 DFBE [ FALSE = &00 -- MOS38 0594 DFBE ] -- MOS38 0595 DFBE AE C2 03 LDX INFO +BKEXEC ;get selected slot to X MOS38 0702 E02C ^10 MOS38 0596 DFC1 E0 10 CPXIM NROM ;does the slot have a table entry? MOS38 0702 E02C ^10 MOS38 0597 DFC3 [ TRUE = &00 MOS38 0702 E02C ^10 MOS38 0598 DFC3 B0 70 BCS FRIEZE ;[not in table] MOS38 0598 DFC3 v0F MOS38 0599 DFC5 | MOS38 0598 DFC3 v0F MOS38 0601 DFC5 ] MOS38 0598 DFC3 v0F MOS38 0602 DFC5 BD A1 02 LDAAX ROMS MOS38 0598 DFC3 v0F MOS38 0603 DFC8 10 6B BPL FRIEZE ;[not a service ROM] MOS38 0598 DFC3 v0F MOS38 0604 DFCA ABACUS MOS38 0598 DFC3 v0F MOS38 0605 DFCA A5 F4 LDA ROMID ;save current ROM MOS38 0598 DFC3 v0F MOS38 0606 DFCC 48 PHA MOS38 0598 DFC3 v0F MOS38 0607 DFCD 20 E2 DB JSR STXROM MOS38 0598 DFC3 v0F MOS38 0608 DFD0 A9 04 LDAIM SVNAME MOS38 0598 DFC3 v0F MOS38 0609 DFD2 20 03 80 JSR ROMSFT ;call service ROM MOS38 0598 DFC3 v0F MOS38 0610 DFD5 AA TAX ;if ROM did not claim the call MOS38 0598 DFC3 v0F MOS38 0611 DFD6 D0 5D BNE FRIEZE ;then raise "Bad command" MOS38 0598 DFC3 v0F MOS38 0612 DFD8 4C 8D F1 JMP SVOP3 ;[service claimed, do not offer to other ROMs] MOS38 0598 DFC3 v0F MOS38 0613 DFDB | MOS38 0598 DFC3 v0F MOS38 0622 DFDB ] MOS38 0598 DFC3 v0F MOS38 0623 DFDB ] MOS38 0598 DFC3 v0F MOS38 0624 DFDB MOS38 0598 DFC3 v0F MOS38 0625 DFDB [ MOS125 = &00 MOS38 0598 DFC3 v0F MOS38 0634 DFDB ] MOS38 0598 DFC3 v0F MOS38 0635 DFDB MOS38 0598 DFC3 v0F MOS38 0636 DFDB [ MOS125 = &FF MOS38 0598 DFC3 v0F MOS38 0637 DFDB | MOS38 0598 DFC3 v0F MOS38 0638 DFDB CLINT MOS38 0598 DFC3 v0F MOS38 0639 DFDB 86 F2 STX WORK +&00 MOS38 0598 DFC3 v0F MOS38 0640 DFDD 84 F3 STY WORK +&01 MOS38 0598 DFC3 v0F MOS38 0641 DFDF ; report *command to filing system MOS38 0598 DFC3 v0F MOS38 0642 DFDF A9 08 LDAIM FSCLI MOS38 0598 DFC3 v0F MOS38 0643 DFE1 20 A8 E0 JSR JMIFSC MOS38 0598 DFC3 v0F MOS38 0644 DFE4 ; check line is terminated by CR MOS38 0598 DFC3 v0F MOS38 0645 DFE4 A0 00 LDYIM ZERO MOS38 0598 DFC3 v0F MOS38 0646 DFE6 A9 0D LDAIM MCR MOS38 0598 DFC3 v0F MOS38 0647 DFE8 D1 F2 CLICHK CMPIY WORK MOS38 0598 DFC3 v0F MOS38 0648 DFEA F0 04 BEQ CLILOK ;[terminator present] MOS38 0598 DFC3 v0F MOS38 0649 DFEC C8 INY MOS38 0598 DFC3 v0F MOS38 0650 DFED D0 F9 BNE CLICHK MOS38 0598 DFC3 v0F MOS38 0651 DFEF ; no terminator within 256 bytes so ignore line MOS38 0598 DFC3 v0F MOS38 0652 DFEF CLIRTS MOS38 0598 DFC3 v0F MOS38 0653 DFEF 60 RTS MOS38 0598 DFC3 v0F MOS38 0654 DFF0 ; MOS38 0598 DFC3 v0F MOS38 0655 DFF0 A0 FF CLILOK LDYIM &FF ;start scan from beginning of input buffer MOS38 0598 DFC3 v0F MOS38 0656 DFF2 ; N.B. Y will now be incremented to ZERO by SKIPSN MOS38 0598 DFC3 v0F MOS38 0657 DFF2 CLIR ;skip leading spaces and asterisks MOS38 0598 DFC3 v0F MOS38 0658 DFF2 20 AB E0 JSR SKIPSN ;skip spaces/asterisk and spaces MOS38 0598 DFC3 v0F MOS38 0659 DFF5 F0 F8 BEQ CLIRTS ;[reached end-of-line, ignore line] MOS38 0598 DFC3 v0F MOS38 0660 DFF7 C9 2A CMPIM SPLAT MOS38 0598 DFC3 v0F MOS38 0661 DFF9 F0 F7 BEQ CLIR ;[asterisk, ignore] MOS38 0598 DFC3 v0F MOS38 0662 DFFB [ FALSE=0 MOS38 0598 DFC3 v0F MOS38 0666 DFFB ] MOS38 0598 DFC3 v0F MOS38 0667 DFFB ; ignore comment line MOS38 0598 DFC3 v0F MOS38 0668 DFFB C9 7C CMPIM "|" MOS38 0598 DFC3 v0F MOS38 0669 DFFD F0 F0 BEQ CLIRTS ;[*| command] MOS38 0598 DFC3 v0F MOS38 0670 DFFF ; check for override MOS38 0598 DFC3 v0F MOS38 0671 DFFF C9 2F CMPIM "/" MOS38 0598 DFC3 v0F MOS38 0672 E001 D0 09 BNE NOTSL ;[not /] MOS38 MOS38 MOS38 MOS38 Acorn macro assembler Page 73 MOS38 MOS38 CLI MOS38 MOS38 0598 DFC3 v0F MOS38 0673 E003 ; */name MOS38 0598 DFC3 v0F MOS38 0674 E003 C8 INY ;skip past / MOS38 0598 DFC3 v0F MOS38 0675 E004 20 77 E0 JSR CLIXY ;make XY -> after / MOS38 0598 DFC3 v0F MOS38 0676 E007 A9 02 LDAIM FSNOTA MOS38 0598 DFC3 v0F MOS38 0677 E009 [ MOS125 = &7F MOS38 0598 DFC3 v0F MOS38 0678 E009 [ STARGO = &00 MOS38 0598 DFC3 v0F MOS38 0679 E009 4C A1 E0 JMP JMICMD ;[ALWAYS JUMP] MOS38 0598 DFC3 v0F MOS38 0680 E00C NOTSL MOS38 0598 DFC3 v0F MOS38 0681 E00C ; save pointer to rest of line MOS38 0598 DFC3 v0F MOS38 0682 E00C 84 E6 STY CLIRY MOS38 0598 DFC3 v0F MOS38 0683 E00E C9 3A CMPIM ":" MOS38 0598 DFC3 v0F MOS38 0684 E010 D0 26 BNE NOTCO MOS38 0598 DFC3 v0F MOS38 0685 E012 C8 INY ;skip past colon MOS38 0598 DFC3 v0F MOS38 0686 E013 [ TRUE = &00 MOS38 0598 DFC3 v0F MOS38 0687 E013 D1 F2 CMPIY WORK ;is there a second colon? MOS38 0598 DFC3 v0F MOS38 0688 E015 D0 21 BNE NOTCO ;reject if not MOS38 0598 DFC3 v0F MOS38 0689 E017 C8 INY ;skip past colon MOS38 0598 DFC3 v0F MOS38 0690 E018 ] MOS38 0598 DFC3 v0F MOS38 0691 E018 D1 F2 CMPIY WORK ;three colons? MOS38 0598 DFC3 v0F MOS38 0692 E01A D0 06 BNE COLON ;if not then get hex MOS38 0598 DFC3 v0F MOS38 0693 E01C 20 AB E0 JSR SKIPSN ;else skip colon and spaces MOS38 0598 DFC3 v0F MOS38 0694 E01F 98 TYA ;command line offset to A MOS38 0598 DFC3 v0F MOS38 0695 E020 D0 7A BNE CLIFS ;pass rest of line via FSC 3 (always) MOS38 0695 E020 v05 MOS38 0696 E022 COLON MOS38 0695 E020 v05 MOS38 0697 E022 A2 D4 LDXIM INFO +BKEXEC -FBLOCK ;hopefully out of the way MOS38 0695 E020 v05 MOS38 0698 E024 20 97 E2 JSR LSA ;hex to scratch space MOS38 0695 E020 v05 MOS38 0699 E027 08 PHP ;save result MOS38 0695 E020 v05 MOS38 0700 E028 20 AC E0 JSR SKIPSP MOS38 0695 E020 v05 MOS38 0701 E02B 28 PLP MOS38 0695 E020 v05 MOS38 0702 E02C B0 90 BCS COLHEX ;if hex present, call specific ROM MOS38 0695 E020 v05 MOS38 0703 E02E A2 04 LDXIM SVNAME ;else pass to service ROMs only MOS38 0695 E020 v05 MOS38 0704 E030 20 71 F1 JSR SVOP MOS38 0695 E020 v05 MOS38 0705 E033 F0 50 BEQ SVACK MOS38 0695 E020 v05 MOS38 0706 E035 FRIEZE MOS38 0695 E020 v05 MOS38 0707 E035 4C 89 E3 JMP MBDCMD MOS38 0695 E020 v05 MOS38 0708 E038 NOTCO MOS38 0695 E020 v05 MOS38 0709 E038 | MOS38 0695 E020 v05 MOS38 0714 E038 ] MOS38 0695 E020 v05 MOS38 0715 E038 | MOS38 0695 E020 v05 MOS38 0720 E038 ] MOS38 0695 E020 v05 MOS38 0721 E038 ; X=&FF going to 0, point to start of table MOS38 0695 E020 v05 MOS38 0722 E038 A2 FF LDXIM &FF MOS38 0695 E020 v05 MOS38 0723 E03A CLIRST ; restart search at next keyword MOS38 0695 E020 v05 MOS38 0724 E03A A4 E6 LDY CLIRY ; reset pointer to start of user word MOS38 0695 E020 v05 MOS38 0725 E03C 88 DEY ;cancel first INY MOS38 0695 E020 v05 MOS38 0726 E03D CLIADV ; compare characters MOS38 0695 E020 v05 MOS38 0727 E03D C8 INY ; advance user word pointer MOS38 0695 E020 v05 MOS38 0728 E03E B1 F2 LDAIY WORK ; fetch user character MOS38 0695 E020 v05 MOS38 0729 E040 29 DF ANDIM &DF ;equate cases MOS38 0695 E020 v05 MOS38 0730 E042 C9 5B CMPIM "Z"+&01 MOS38 0695 E020 v05 MOS38 0731 E044 90 02 BCC CLIALF ;if above "Z" MOS38 0695 E020 v05 MOS38 0732 E046 A9 00 LDAIM &00 ;then ensure A<&30, C=0 MOS38 0695 E020 v05 MOS38 0733 E048 C9 41 CLIALF CMPIM "A" ;C=1, "A"<=A<="Z" iff alpha MOS38 0695 E020 v05 MOS38 0734 E04A E8 INX ; advance table pointer or skip aux byte MOS38 0695 E020 v05 MOS38 0735 E04B 5D C0 DE EORAX COMTAB ; set b7 from table and compare b6..0 MOS38 0695 E020 v05 MOS38 0736 E04E F0 ED BEQ CLIADV ;keywords must be all capital letters MOS38 0695 E020 v05 MOS38 0737 E050 B0 09 BCS CLISKP ;C=1, mismatch or end of keyword, reject MOS38 0695 E020 v05 MOS38 0738 E052 30 07 BMI CLISKP ;C=0, end of both words, accept MOS38 0695 E020 v05 MOS38 0739 E054 B1 F2 LDAIY WORK ;else end of user word, test for abbreviation MOS38 0695 E020 v05 MOS38 0740 E056 C8 INY ;move past the dot MOS38 0695 E020 v05 MOS38 0741 E057 49 2E EORIM "." MOS38 0695 E020 v05 MOS38 0742 E059 C9 01 CMPIM &01 ;C=1 iff not dot, reject MOS38 0695 E020 v05 MOS38 0743 E05B CLISKP MOS38 0695 E020 v05 MOS38 0744 E05B E8 INX ; skip high byte of action address MOS38 0695 E020 v05 MOS38 0745 E05C CLIALI ; align to keyword terminator MOS38 0695 E020 v05 MOS38 0746 E05C E8 INX ; advance table pointer or skip low byte of action address MOS38 0695 E020 v05 MOS38 0747 E05D BD BE DE LDAAX COMTAB -&02 ; test table byte at original offset MOS38 0695 E020 v05 MOS38 0748 E060 10 FA BPL CLIALI ;[not reached address hi-byte] MOS38 0695 E020 v05 MOS38 0749 E062 B0 2A BCS CLITMN ;if C=1, compare with next keyword MOS38 0695 E020 v05 MOS38 0750 E064 ;CLIMFN ;full name match MOS38 0695 E020 v05 MOS38 0751 E064 ; found CLI command match MOS38 0695 E020 v05 MOS38 0752 E064 ; construct JMI hi-byte value to command processing code MOS38 0695 E020 v05 MOS38 0753 E064 48 PHA MOS38 0695 E020 v05 MOS38 0754 E065 ; construct JMI lo-byte value to command processing code MOS38 0695 E020 v05 MOS38 0755 E065 BD BF DE LDAAX COMTAB -&01 MOS38 0695 E020 v05 MOS38 0756 E068 48 PHA MOS38 0695 E020 v05 MOS38 0757 E069 ; skip spaces after command name MOS38 0695 E020 v05 MOS38 0758 E069 20 AC E0 JSR SKIPSP MOS38 0695 E020 v05 MOS38 0759 E06C 18 CLC ;C=0 used by FXN entry MOS38 0695 E020 v05 MOS38 0760 E06D 08 PHP ;status used by EXEC and SPOOL MOS38 0695 E020 v05 MOS38 0761 E06E ; (optionally) make XY -> rest of line MOS38 0695 E020 v05 MOS38 0762 E06E 20 72 E0 JSR CLIXYA MOS38 0695 E020 v05 MOS38 0763 E071 40 RTI ;enter command processing routine MOS38 0695 E020 v05 MOS38 0764 E072 MOS38 0695 E020 v05 MOS38 0765 E072 MOS38 0695 E020 v05 MOS38 0766 E072 CLIXYA ;conditionally make XY -> rest of line MOS38 0695 E020 v05 MOS38 0767 E072 BD C0 DE LDAAX COMTAB MOS38 0695 E020 v05 MOS38 0768 E075 30 0E BMI CLIXY0 ;[keep Y = offset of rest of line from WORK] MOS38 0695 E020 v05 MOS38 0769 E077 CLIXY ;make XY -> rest of command line MOS38 0695 E020 v05 MOS38 0770 E077 98 TYA ;A = offset of rest of line MOS38 0695 E020 v05 MOS38 0771 E078 BC C0 DE LDYAX COMTAB ;Y := function code MOS38 0695 E020 v05 MOS38 0772 E07B CLIXY2 MOS38 0695 E020 v05 MOS38 0773 E07B 18 CLC MOS38 0695 E020 v05 MOS38 0774 E07C 65 F2 ADC WORK ;N.B. C=1 => carry MOS38 0695 E020 v05 MOS38 0775 E07E AA TAX ;X = lo-byte of pointer to rest of line MOS38 0695 E020 v05 MOS38 0776 E07F 98 TYA ;A = function code MOS38 0695 E020 v05 MOS38 0777 E080 A4 F3 LDY WORK +&01 MOS38 0695 E020 v05 MOS38 0778 E082 90 01 BCC CLIXY1 ;[no carry] MOS38 0695 E020 v05 MOS38 0779 E084 ; carry MOS38 0695 E020 v05 MOS38 0780 E084 C8 INY MOS38 0695 E020 v05 MOS38 0781 E085 CLIXY1 ;N.B. Y = hi-byte of pointer to rest of line MOS38 0695 E020 v05 MOS38 0782 E085 CLIXY0 MOS38 0695 E020 v05 MOS38 0783 E085 SVACK ;command accepted by service ROM MOS38 0695 E020 v05 MOS38 0784 E085 60 RTS MOS38 0695 E020 v05 MOS38 0785 E086 MOS38 0695 E020 v05 MOS38 0786 E086 MOS38 0695 E020 v05 MOS38 0787 E086 BASIC ;select BASIC language ROM MOS38 0695 E020 v05 MOS38 0788 E086 AE 4B 02 LDX BROMID MOS38 0695 E020 v05 MOS38 0789 E089 30 06 BMI NBASIC ;[no BASIC ROM] MOS38 0695 E020 v05 MOS38 0790 E08B 4C B0 DB JMP ILR2 ;enter BASIC ROM (N.B. A b0=1, enter with C=1) MOS38 0695 E020 v05 MOS38 0791 E08E MOS38 0695 E020 v05 MOS38 0792 E08E CLITMN MOS38 0695 E020 v05 MOS38 0793 E08E 0A ASLA MOS38 0695 E020 v05 MOS38 0794 E08F D0 A9 BNE CLIRST MOS38 0695 E020 v05 MOS38 0795 E091 ;else fall through to CLIEND MOS38 0695 E020 v05 MOS38 0796 E091 MOS38 0695 E020 v05 MOS38 0797 E091 MOS38 0695 E020 v05 MOS38 0798 E091 ;END OF MOS 1.25 MOS38 0695 E020 v05 MOS38 0799 E091 ] MOS38 0695 E020 v05 MOS38 0800 E091 MOS38 0695 E020 v05 MOS38 0801 E091 LNK MOS39 MOS39 MOS39 MOS39 MOS39 Acorn macro assembler Page 74 MOS39 MOS38 CLI MOS39 MOS38 0695 E020 v05 MOS39 0001 E091 ; > MOS39 MOS38 0695 E020 v05 MOS39 0002 E091 TTL MOS39 CLI MOS38 0695 E020 v05 MOS39 0003 E091 OPT MOS39 MOS39 MOS39 MOS39 MOS39 Acorn macro assembler Page 75 MOS39 MOS39 CLI MOS39 MOS38 0695 E020 v05 MOS39 0004 E091 ;(c) 1981 ACORN MOS38 0695 E020 v05 MOS39 0005 E091 ;BBC MOS MOS38 0695 E020 v05 MOS39 0006 E091 ;Change record: MOS38 0695 E020 v05 MOS39 0007 E091 ;004 29-Jul-81 MP Prototype version MOS38 0695 E020 v05 MOS39 0008 E091 ;Author(s): MOS38 0695 E020 v05 MOS39 0009 E091 ;PB Paul Bond MOS38 0695 E020 v05 MOS39 0010 E091 ;MP Mike Prees MOS38 0695 E020 v05 MOS39 0011 E091 MOS38 0695 E020 v05 MOS39 0012 E091 MOS38 0695 E020 v05 MOS39 0013 E091 NBASIC ;BASIC ROM not present so offer to service ROMs MOS38 0695 E020 v05 MOS39 0014 E091 CLIEND ;entered here if command not recognised or does not exist MOS38 0695 E020 v05 MOS39 0015 E091 ; offer command to service ROMs MOS38 0695 E020 v05 MOS39 0016 E091 A4 E6 LDY CLIRY ;restore Y offset to point to command name MOS38 0695 E020 v05 MOS39 0017 E093 A2 04 LDXIM SVNAME MOS38 0695 E020 v05 MOS39 0018 E095 20 71 F1 JSR SVOP MOS38 0695 E020 v05 MOS39 0019 E098 F0 EB BEQ SVACK ;[accepted by service ROM] MOS38 0695 E020 v05 MOS39 0020 E09A ; command not accepted by a service ROM MOS38 0695 E020 v05 MOS39 0021 E09A ; so pass command to filing system MOS38 0695 E020 v05 MOS39 0022 E09A A5 E6 LDA CLIRY ;A = offset to command name MOS38 0695 E020 v05 MOS39 0023 E09C [ MOS125 = &7F MOS38 0695 E020 v05 MOS39 0024 E09C [ STARGO = &00 MOS38 0695 E020 v05 MOS39 0025 E09C CLIFS MOS38 0695 E020 v05 MOS39 0026 E09C ] MOS38 0695 E020 v05 MOS39 0027 E09C ] MOS38 0695 E020 v05 MOS39 0028 E09C 20 7B E0 JSR CLIXY2 ;make XY -> rest of line -- MOS39 0029 E09F A9 03 LDAIM FSNAME -- MOS39 0030 E0A1 [ MOS125 = &7F -- MOS39 0031 E0A1 [ STARGO = &00 -- MOS39 0032 E0A1 JMICMD -- MOS39 0033 E0A1 ;entry for FSC calls 2,3,4,(11) -- MOS39 0034 E0A1 ;cancel OSARGS 1 intercept, FS provides the tail pointer itself -- MOS39 0035 E0A1 48 PHA -- MOS39 0036 E0A2 A9 00 LDAIM &00 -- MOS39 0037 E0A4 8D D1 02 STA TAILHI -- MOS39 0038 E0A7 68 PLA -- MOS39 0039 E0A8 ] -- MOS39 0040 E0A8 ] -- MOS39 0041 E0A8 -- MOS39 0042 E0A8 JMIFSC -- MOS39 0043 E0A8 -- MOS39 0044 E0A8 6C 1E 02 JMI FSCVEC -- MOS39 0045 E0AB [ MOS125 = &FF -- MOS39 0054 E0AB ] -- MOS39 0055 E0AB -- MOS39 0056 E0AB -- MOS39 0057 E0AB ; ignore space characters -- MOS39 0058 E0AB C8 SKIPSN INY ;skip current character MOS39 0061 E0B0 ^79 MOS39 0059 E0AC B1 F2 SKIPSP LDAIY WORK MOS39 0068 E0B5 ^75 MOS39 0060 E0AE C9 20 CMPIM SPACE MOS39 0068 E0B5 ^75 MOS39 0061 E0B0 F0 F9 BEQ SKIPSN ;[character is space, ignore] MOS39 0068 E0B5 ^75 MOS39 0062 E0B2 C9 0D SKPSP1 CMPIM MCR MOS39 0073 E0BC ^74 MOS39 0063 E0B4 ; Z=1 next character is CR MOS39 0073 E0BC ^74 MOS39 0064 E0B4 ; Z=0 next character is not CR MOS39 0073 E0BC ^74 MOS39 0065 E0B4 60 RTS MOS39 0073 E0BC ^74 MOS39 0066 E0B5 SKPCM ;C=0 => check for line end MOS39 0073 E0BC ^74 MOS39 0067 E0B5 ;C=1 => skip optional comma and check for line end MOS39 0073 E0BC ^74 MOS39 0068 E0B5 90 F5 BCC SKIPSP MOS39 0073 E0BC ^74 MOS39 0069 E0B7 SKPCOM MOS39 0073 E0BC ^74 MOS39 0070 E0B7 ; skip spaces and an optional comma MOS39 0073 E0BC ^74 MOS39 0071 E0B7 20 AC E0 JSR SKIPSP MOS39 0073 E0BC ^74 MOS39 0072 E0BA C9 2C CMPIM "," MOS39 0073 E0BC ^74 MOS39 0073 E0BC D0 F4 BNE SKPSP1 -- MOS39 0074 E0BE C8 INY ;N.B. force Z=0 (i.e. non-zero result) -- MOS39 0075 E0BF 60 RTS -- MOS39 0076 E0C0 ; get decimal number -- MOS39 0077 E0C0 [ MOS125 = &FF -- MOS39 0110 E0C0 | -- MOS39 0111 E0C0 GETNUM -- MOS39 0112 E0C0 20 AC E0 JSR SKIPSP ;skip leading spaces, A := delimiter -- MOS39 0113 E0C3 20 E6 E0 JSR TSTNUM -- MOS39 0114 E0C6 B0 11 BCS GN0 MOS39 0114 E0C6 v6E MOS39 0115 E0C8 60 RTS ;C=0 [not a digit] MOS39 0114 E0C6 v6E MOS39 0116 E0C9 MOS39 0114 E0C6 v6E MOS39 0117 E0C9 GNT MOS39 0114 E0C6 v6E MOS39 0118 E0C9 E0 1A CPXIM &1A ;if 26 or more MOS39 0130 E0DF ^68 MOS39 0119 E0CB B0 28 BCS TSTNR ;then overflow MOS39 0119 E0CB v57 MOS39 0120 E0CD 06 E6 ASL NUMBER ;else double accumulated value MOS39 0119 E0CB v57 MOS39 0121 E0CF 65 E6 ADC NUMBER ;C=0; A := N + 2*X MOS39 0119 E0CB v57 MOS39 0122 E0D1 06 E6 ASL NUMBER ;quadruple accumulated value MOS39 0119 E0CB v57 MOS39 0123 E0D3 65 E6 ADC NUMBER ;C=0; A := N + 6*X MOS39 0119 E0CB v57 MOS39 0124 E0D5 65 E6 ADC NUMBER ;C=0; A := N + 10*X MOS39 0119 E0CB v57 MOS39 0125 E0D7 B0 1C BCS TSTNR ;[overflow] MOS39 0119 E0CB v57 MOS39 0126 E0D9 GN0 MOS39 0119 E0CB v57 MOS39 0127 E0D9 85 E6 STA NUMBER ;NUMBER := accumulated number so far (must save for KEY) MOS39 0119 E0CB v57 MOS39 0128 E0DB AA TAX MOS39 0119 E0CB v57 MOS39 0129 E0DC 20 E5 E0 JSR TSTNUX ;read digit skipping current character MOS39 0119 E0CB v57 MOS39 0130 E0DF B0 E8 BCS GNT ;process digit [non-digit serves as terminator] MOS39 0119 E0CB v57 MOS39 0131 E0E1 C9 0D CMPIM MCR MOS39 0119 E0CB v57 MOS39 0132 E0E3 TSTNRG MOS39 0119 E0CB v57 MOS39 0133 E0E3 38 SEC MOS39 0119 E0CB v57 MOS39 0134 E0E4 ; return with: MOS39 0119 E0CB v57 MOS39 0135 E0E4 ; C=1 => valid number, Z=1/0 => delimiter is/is_not CR, number in X MOS39 0119 E0CB v57 MOS39 0136 E0E4 60 RTS MOS39 0119 E0CB v57 MOS39 0137 E0E5 ] MOS39 0119 E0CB v57 MOS39 0138 E0E5 MOS39 0119 E0CB v57 MOS39 0139 E0E5 ; check character is a digit MOS39 0119 E0CB v57 MOS39 0140 E0E5 TSTNUX MOS39 0119 E0CB v57 MOS39 0141 E0E5 C8 INY ;skip current character MOS39 0119 E0CB v57 MOS39 0142 E0E6 TSTNUM MOS39 0119 E0CB v57 MOS39 0143 E0E6 B1 F2 LDAIY WORK ;get next character MOS39 0119 E0CB v57 MOS39 0144 E0E8 [ MOS125 = &FF MOS39 0119 E0CB v57 MOS39 0152 E0E8 | MOS39 0119 E0CB v57 MOS39 0153 E0E8 49 30 EORIM "0" ;convert digit to number, all other chars higher MOS39 0119 E0CB v57 MOS39 0154 E0EA C9 0A CMPIM &0A ;if number in range 0..9 MOS39 0119 E0CB v57 MOS39 0155 E0EC 90 F5 BCC TSTNRG ;then return C=1, A=valid number MOS39 0119 E0CB v57 MOS39 0156 E0EE 49 30 EORIM "0" ;else restore other character MOS39 0119 E0CB v57 MOS39 0157 E0F0 18 CLC ;return C=0, not a digit MOS39 0119 E0CB v57 MOS39 0158 E0F1 60 RTS MOS39 0119 E0CB v57 MOS39 0159 E0F2 ] MOS39 0119 E0CB v57 MOS39 0160 E0F2 MOS39 0119 E0CB v57 MOS39 0161 E0F2 TSTNRX MOS39 0119 E0CB v57 MOS39 0162 E0F2 20 B7 E0 JSR SKPCOM MOS39 0119 E0CB v57 MOS39 0163 E0F5 TSTNR MOS39 0119 E0CB v57 MOS39 0164 E0F5 18 CLC MOS39 0185 E104 ^6C MOS39 0165 E0F6 ; C=0 bad number, A = delimiting character MOS39 0185 E104 ^6C MOS39 0166 E0F6 60 RTS MOS39 0185 E104 ^6C MOS39 0167 E0F7 MOS39 0185 E104 ^6C MOS39 0168 E0F7 TSTHEX ;test for, and convert, hex digit MOS39 0185 E104 ^6C MOS39 0169 E0F7 20 E6 E0 JSR TSTNUM MOS39 0185 E104 ^6C MOS39 0170 E0FA B0 0A BCS TSTH0 ;[is a number, therefore a valid hex digit] MOS39 0185 E104 ^6C MOS39 0171 E0FC 29 DF ANDIM &DF ;force upper case MOS39 MOS39 MOS39 MOS39 Acorn macro assembler Page 76 MOS39 MOS39 CLI MOS39 MOS39 0185 E104 ^6C MOS39 0172 E0FE [ MOS125 = &FF MOS39 0185 E104 ^6C MOS39 0180 E0FE | MOS39 0185 E104 ^6C MOS39 0181 E0FE 08 PHP ;C=0; save V MOS39 0185 E104 ^6C MOS39 0182 E0FF 69 B9 ADCIM &B9 ;= &FA - 'A' MOS39 0185 E104 ^6C MOS39 0183 E101 28 PLP ;restore V MOS39 0185 E104 ^6C MOS39 0184 E102 C9 FA CMPIM &FA ;b7..4 = %1111, discarded MOS39 0185 E104 ^6C MOS39 0185 E104 90 EC BCC TSTNRX ;[<>'A'-'F' so fail] MOS39 0170 E0FA v75 MOS39 0186 E106 ] MOS39 0170 E0FA v75 MOS39 0187 E106 ; C=1 MOS39 0170 E0FA v75 MOS39 0188 E106 TSTH0 ;C=1 MOS39 0170 E0FA v75 MOS39 0189 E106 C8 INY -- MOS39 0190 E107 60 RTS -- MOS39 0191 E108 -- MOS39 0192 E108 -- MOS39 0193 E108 WRCH ;system write character -- MOS39 0194 E108 [ MOS125 = &FF -- MOS39 0195 E108 | -- MOS39 0196 E108 18 CLC ;don't sink after null NETV, don't print w/o VDU -- MOS39 0197 E109 ] -- MOS39 0198 E109 48 PHA ;save character on stack -- MOS39 0199 E10A 8A TXA ;save registers -- MOS39 0200 E10B 48 PHA -- MOS39 0201 E10C 98 TYA -- MOS39 0202 E10D 48 PHA -- MOS39 0203 E10E BA TSX -- MOS39 0204 E10F BD 03 01 LDAAX &0103 ;restore character -- MOS39 0205 E112 48 PHA -- MOS39 0206 E113 ; A = character -- MOS39 0207 E113 -- MOS39 0208 E113 ; examine WRCH selection(s) -- MOS39 0209 E113 ; -- MOS39 0210 E113 2C 60 02 BIT NETWRC -- MOS39 0211 E116 10 08 BPL WRCNTN ;[WRCH not to net] MOS39 0211 E116 v77 MOS39 0212 E118 ; WRCH to net MOS39 0211 E116 v77 MOS39 0213 E118 ; A = character MOS39 0211 E116 v77 MOS39 0214 E118 A8 TAY ;send character in Y MOS39 0211 E116 v77 MOS39 0215 E119 A9 04 LDAIM NTWRCH MOS39 0211 E116 v77 MOS39 0216 E11B 20 F5 E5 JSR JMINET ;WRCH thru net MOS39 0211 E116 v77 MOS39 0217 E11E B0 51 BCS WRCHNN ;[immediate return to caller] MOS39 0217 E11E v2E MOS39 0218 E120 ; MOS39 0217 E11E v2E MOS39 0219 E120 ; continue within WRCH MOS39 0217 E11E v2E MOS39 0220 E120 ; MOS39 0217 E11E v2E MOS39 0221 E120 WRCNTN MOS39 0217 E11E v2E MOS39 0222 E120 MOS39 0217 E11E v2E MOS39 0223 E120 [ MOS125 = &FF MOS39 0217 E11E v2E MOS39 0225 E120 ] MOS39 0217 E11E v2E MOS39 0226 E120 A9 02 LDAIM WRVDU MOS39 0217 E11E v2E MOS39 0227 E122 2C 7C 02 BIT WRCHSW MOS39 0217 E11E v2E MOS39 0228 E125 D0 05 BNE WRCHNV ;[WRCH not to VDU] MOS39 0217 E11E v2E MOS39 0229 E127 ; WRCH to VDU MOS39 0217 E11E v2E MOS39 0230 E127 68 PLA MOS39 0217 E11E v2E MOS39 0231 E128 48 PHA ;A := character MOS39 0217 E11E v2E MOS39 0232 E129 20 C0 C4 JSR VDU MOS39 0217 E11E v2E MOS39 0233 E12C ; C=0 => VDU says do not print character MOS39 0217 E11E v2E MOS39 0234 E12C WRCHNV ;WRCH not to VDU MOS39 0217 E11E v2E MOS39 0235 E12C MOS39 0217 E11E v2E MOS39 0236 E12C ; C=0 => VDU (if selected) says do not print character MOS39 0217 E11E v2E MOS39 0237 E12C ; check who controls printing MOS39 0217 E11E v2E MOS39 0238 E12C A9 08 LDAIM WRPRNT MOS39 0217 E11E v2E MOS39 0239 E12E 2C 7C 02 BIT WRCHSW MOS39 0217 E11E v2E MOS39 0240 E131 D0 02 BNE WRCHNC ;[printing not controlled by VDU] MOS39 0217 E11E v2E MOS39 0241 E133 ; printing controlled by VDU MOS39 0217 E11E v2E MOS39 0242 E133 90 05 BCC WRCHNP ;[VDU says do not print character] MOS39 0217 E11E v2E MOS39 0243 E135 WRCHNC ;conditionally print character MOS39 0217 E11E v2E MOS39 0244 E135 68 PLA MOS39 0217 E11E v2E MOS39 0245 E136 48 PHA ;A := character MOS39 0217 E11E v2E MOS39 0246 E137 20 78 E1 JSR MPRINT ;conditionally print character MOS39 0217 E11E v2E MOS39 0247 E13A WRCHNP ;do not print character MOS39 0217 E11E v2E MOS39 0248 E13A MOS39 0217 E11E v2E MOS39 0249 E13A ; check for output to RS423 MOS39 0217 E11E v2E MOS39 0250 E13A ; MOS39 0217 E11E v2E MOS39 0251 E13A [ FALSE=0 MOS39 0217 E11E v2E MOS39 0255 E13A | MOS39 0217 E11E v2E MOS39 0256 E13A AD 7C 02 LDA WRCHSW MOS39 0217 E11E v2E MOS39 0257 E13D 6A RORA ;**************** ASSUME WRRS = 1 **************** MOS39 0217 E11E v2E MOS39 0258 E13E 90 1B BCC WRCHNR ;[RS423 disabled] MOS39 0217 E11E v2E MOS39 0259 E140 ] MOS39 0217 E11E v2E MOS39 0260 E140 MOS39 0217 E11E v2E MOS39 0261 E140 ; WRCH via RS423 MOS39 0217 E11E v2E MOS39 0262 E140 A4 EA LDY RSTUT MOS39 0217 E11E v2E MOS39 0263 E142 88 DEY MOS39 0217 E11E v2E MOS39 0264 E143 10 16 BPL WRCHNR ;[RS423 managed by CFS, ignore WRCH request] MOS39 0217 E11E v2E MOS39 0265 E145 68 PLA MOS39 0217 E11E v2E MOS39 0266 E146 48 PHA ;A := character MOS39 0217 E11E v2E MOS39 0267 E147 ; MOS39 0217 E11E v2E MOS39 0268 E147 08 PHP MOS39 0217 E11E v2E MOS39 0269 E148 78 SEI MOS39 0217 E11E v2E MOS39 0270 E149 A2 02 LDXIM BRSO MOS39 0217 E11E v2E MOS39 0271 E14B 48 PHA MOS39 0217 E11E v2E MOS39 0272 E14C 20 D3 E4 JSR EXAM MOS39 0217 E11E v2E MOS39 0273 E14F 90 03 BCC WRCNP1 ;[buffer not empty] MOS39 0217 E11E v2E MOS39 0274 E151 ; RS423 output buffer empty MOS39 0217 E11E v2E MOS39 0275 E151 20 0C E2 JSR RSBUSY ;enable RS423 Tx interrupts MOS39 0217 E11E v2E MOS39 0276 E154 WRCNP1 MOS39 0217 E11E v2E MOS39 0277 E154 68 PLA MOS39 0217 E11E v2E MOS39 0278 E155 A2 02 LDXIM BRSO MOS39 0217 E11E v2E MOS39 0279 E157 20 70 E2 JSR WRITE ;insert character into RS423 output buffer, waiting if necessary MOS39 0217 E11E v2E MOS39 0280 E15A ; N.B. WRITE disables interrupts MOS39 0217 E11E v2E MOS39 0281 E15A ; character not inserted if ESCAPE detected MOS39 0217 E11E v2E MOS39 0282 E15A 28 PLP MOS39 0217 E11E v2E MOS39 0283 E15B ; MOS39 0217 E11E v2E MOS39 0284 E15B WRCHNR ;not via RS423 MOS39 0217 E11E v2E MOS39 0285 E15B MOS39 0217 E11E v2E MOS39 0286 E15B ; check for spooling enabled MOS39 0217 E11E v2E MOS39 0287 E15B ; check whether spooling active MOS39 0217 E11E v2E MOS39 0288 E15B A9 10 LDAIM WRSPL MOS39 0217 E11E v2E MOS39 0289 E15D 2C 7C 02 BIT WRCHSW MOS39 0217 E11E v2E MOS39 0290 E160 D0 0F BNE WRCHNS ;[spooling disabled] MOS39 0217 E11E v2E MOS39 0291 E162 ; spool character MOS39 0217 E11E v2E MOS39 0292 E162 AC 57 02 LDY SPOOLH MOS39 0217 E11E v2E MOS39 0293 E165 F0 0A BEQ WRCHNS ;[spooling not active] MOS39 0217 E11E v2E MOS39 0294 E167 ; spooling active MOS39 0217 E11E v2E MOS39 0295 E167 ; write byte to spool file MOS39 0217 E11E v2E MOS39 0296 E167 68 PLA MOS39 0217 E11E v2E MOS39 0297 E168 48 PHA ;A := character MOS39 0217 E11E v2E MOS39 0298 E169 ; MOS39 0217 E11E v2E MOS39 0299 E169 38 SEC MOS39 0217 E11E v2E MOS39 0300 E16A 66 EB ROR ESSEMA ;enter critical region MOS39 0217 E11E v2E MOS39 0301 E16C 20 D4 FF JSR OSBPUT MOS39 0217 E11E v2E MOS39 0302 E16F 46 EB LSR ESSEMA ;exit critical region MOS39 0217 E11E v2E MOS39 0303 E171 WRCHNS ;no spooling MOS39 MOS39 MOS39 MOS39 Acorn macro assembler Page 77 MOS39 MOS39 CLI MOS39 MOS39 0217 E11E v2E MOS39 0304 E171 MOS39 0217 E11E v2E MOS39 0305 E171 WRCHNN MOS39 0217 E11E v2E MOS39 0306 E171 ; exit restoring registers MOS39 0217 E11E v2E MOS39 0307 E171 68 PLA ;pull redundant byte -- MOS39 0308 E172 [ MOS125 = &FF -- MOS39 0309 E172 | -- MOS39 0310 E172 PLYXAR -- MOS39 0311 E172 ] -- MOS39 0312 E172 68 PLA -- MOS39 0313 E173 A8 TAY -- MOS39 0314 E174 68 PLA -- MOS39 0315 E175 AA TAX -- MOS39 0316 E176 68 PLA ;restore character -- MOS39 0317 E177 60 RTS -- MOS39 0318 E178 -- MOS39 0319 E178 MPRINT ;conditionally print character in A -- MOS39 0320 E178 ; N.B. character should never be NUL -- MOS39 0321 E178 ; decide whether to ignore character -- MOS39 0322 E178 2C 7C 02 BIT WRCHSW -- MOS39 0323 E17B 70 20 BVS PRINT0 ;[only print thru VDU1] MOS39 0323 E17B v5F MOS39 0324 E17D CD 86 02 CMP PIGNOR MOS39 0323 E17B v5F MOS39 0325 E180 F0 1B BEQ PRINT0 ;[match on printer ignore character] MOS39 0323 E17B v5F MOS39 0326 E182 ; MOS39 0323 E17B v5F MOS39 0327 E182 ; MOS39 0323 E17B v5F MOS39 0328 E182 ; ====== MOS39 0323 E17B v5F MOS39 0329 E182 ; PRINT MOS39 0323 E17B v5F MOS39 0330 E182 ; ====== MOS39 0323 E17B v5F MOS39 0331 E182 ; MOS39 0323 E17B v5F MOS39 0332 E182 ; Print a character via VDU 1 MOS39 0323 E17B v5F MOS39 0333 E182 ; MOS39 0323 E17B v5F MOS39 0334 E182 ; ENTRY:- A = Character MOS39 0323 E17B v5F MOS39 0335 E182 ; MOS39 0323 E17B v5F MOS39 0336 E182 ; EXIT:- A,X,Y corrupt MOS39 0323 E17B v5F MOS39 0337 E182 ; Flags preserved MOS39 0323 E17B v5F MOS39 0338 E182 ; MOS39 0323 E17B v5F MOS39 0339 E182 PRINT ;used by VDU (SOH), uses fact of exit with C=0 MOS39 0323 E17B v5F MOS39 0340 E182 08 PHP MOS39 0323 E17B v5F MOS39 0341 E183 78 SEI MOS39 0323 E17B v5F MOS39 0342 E184 ; N.B. if print sink is 0 then character will MOS39 0323 E17B v5F MOS39 0343 E184 ; eventually be ignored by STROBE MOS39 0323 E17B v5F MOS39 0344 E184 ; MOS39 0323 E17B v5F MOS39 0345 E184 AA TAX ;save print character MOS39 0323 E17B v5F MOS39 0346 E185 ; MOS39 0323 E17B v5F MOS39 0347 E185 ; test whether printer enabled MOS39 0323 E17B v5F MOS39 0348 E185 ; MOS39 0323 E17B v5F MOS39 0349 E185 A9 04 LDAIM WRPREN MOS39 0323 E17B v5F MOS39 0350 E187 2C 7C 02 BIT WRCHSW MOS39 0323 E17B v5F MOS39 0351 E18A D0 10 BNE PRINT4 ;[printer disabled] MOS39 0323 E17B v5F MOS39 0352 E18C ; MOS39 0323 E17B v5F MOS39 0353 E18C 8A TXA ;restore print character MOS39 0323 E17B v5F MOS39 0354 E18D A2 03 LDXIM BPRNT ;X := print bufferid MOS39 0323 E17B v5F MOS39 0355 E18F 20 70 E2 JSR WRITE ;write character to buffer, waiting if necessary MOS39 0323 E17B v5F MOS39 0356 E192 B0 08 BCS PRINT3 ;[ESCAPE detected] MOS39 0323 E17B v5F MOS39 0357 E194 ; MOS39 0323 E17B v5F MOS39 0358 E194 ; test printer status; interrupts disabled MOS39 0323 E17B v5F MOS39 0359 E194 ; MOS39 0323 E17B v5F MOS39 0360 E194 2C D2 02 BIT PFLAG MOS39 0323 E17B v5F MOS39 0361 E197 10 03 BPL PRINT3 ;[printer busy] MOS39 0323 E17B v5F MOS39 0362 E199 ; MOS39 0323 E17B v5F MOS39 0363 E199 ; printer dormant MOS39 0323 E17B v5F MOS39 0364 E199 ; send the first character MOS39 0323 E17B v5F MOS39 0365 E199 ; MOS39 0323 E17B v5F MOS39 0366 E199 20 D8 E1 JSR STROBE ;send character to selected printer MOS39 0323 E17B v5F MOS39 0367 E19C ; MOS39 0323 E17B v5F MOS39 0368 E19C PRINT3 ;printer busy MOS39 0323 E17B v5F MOS39 0369 E19C PRINT4 ;return enabling interrupts MOS39 0323 E17B v5F MOS39 0370 E19C 28 PLP ;restore interrupt state, set C=0 (fact used by VDU) MOS39 0323 E17B v5F MOS39 0371 E19D ; MOS39 0323 E17B v5F MOS39 0372 E19D PRINT0 MOS39 0323 E17B v5F MOS39 0373 E19D 60 RTS -- MOS39 0374 E19E -- MOS39 0375 E19E -- MOS39 0376 E19E [ MOS125 = &FF -- MOS39 0377 E19E | -- MOS39 0378 E19E FLUSHC ;flush buffer -- MOS39 0379 E19E D0 0F BNE JFLUSH ;[flush currently selected input buffer] MOS39 0379 E19E v70 MOS39 0380 E1A0 ; X=0 => flush all buffers MOS39 0379 E19E v70 MOS39 0381 E1A0 FLSHAL ;flush all buffers MOS39 0379 E19E v70 MOS39 0382 E1A0 A2 08 LDXIM BUPB MOS39 0379 E19E v70 MOS39 0383 E1A2 FLUSH3 MOS39 0379 E19E v70 MOS39 0384 E1A2 ; allow interrupts MOS39 0379 E19E v70 MOS39 0385 E1A2 58 CLI MOS39 0379 E19E v70 MOS39 0386 E1A3 78 SEI MOS39 0379 E19E v70 MOS39 0387 E1A4 20 AA E1 JSR FLUSHS ;flush buffer given by X MOS39 0379 E19E v70 MOS39 0388 E1A7 CA DEX MOS39 0379 E19E v70 MOS39 0389 E1A8 10 F8 BPL FLUSH3 MOS39 0379 E19E v70 MOS39 0390 E1AA ; MOS39 0379 E19E v70 MOS39 0391 E1AA ; N.B. X<0, so is an invalid bufferid (and will be ignored by FLUSHS) MOS39 0379 E19E v70 MOS39 0392 E1AA ; MOS39 0379 E19E v70 MOS39 0393 E1AA FLUSHS ;flush specific buffer MOS39 0379 E19E v70 MOS39 0394 E1AA E0 09 CPXIM BUPB +&01 MOS39 0379 E19E v70 MOS39 0395 E1AC 90 04 BCC FLUSH2 ;[valid bufferid] MOS39 0379 E19E v70 MOS39 0396 E1AE ; invalid bufferid MOS39 0379 E19E v70 MOS39 0397 E1AE 60 RTS MOS39 0379 E19E v70 MOS39 0398 E1AF MOS39 0379 E19E v70 MOS39 0399 E1AF JFLUSH ;flush input buffer and clear soft key expansion MOS39 0379 E19E v70 MOS39 0400 E1AF AE 41 02 LDX RDCHSW ;X := input bufferid MOS39 0395 E1AC v7B MOS39 0401 E1B2 FLUSH2 MOS39 0395 E1AC v7B MOS39 0402 E1B2 STROB4 ;not user print MOS39 0395 E1AC v7B MOS39 0403 E1B2 STCRS ;RS423 managed by cassette MOS39 0395 E1AC v7B MOS39 0404 E1B2 ; ignore print request by purging buffer AND return MOS39 0395 E1AC v7B MOS39 0405 E1B2 PURGE MOS39 0395 E1AC v7B MOS39 0406 E1B2 ; purge buffer given by index in X MOS39 0395 E1AC v7B MOS39 0407 E1B2 ; this routine does not corrupt A or X MOS39 0395 E1AC v7B MOS39 0408 E1B2 18 CLC MOS39 0501 E207 ^29 MOS39 0409 E1B3 ; MOS39 0501 E207 ^29 MOS39 0410 E1B3 PURGEX ;entered by OSWORD sound routine with C=1 MOS39 0501 E207 ^29 MOS39 0411 E1B3 48 PHA ;save A MOS39 0501 E207 ^29 MOS39 0412 E1B4 08 PHP ;save interrupt state MOS39 0501 E207 ^29 MOS39 0413 E1B5 78 SEI MOS39 0501 E207 ^29 MOS39 0414 E1B6 ; MOS39 0501 E207 ^29 MOS39 0415 E1B6 ; kill sound channel if sound buffer MOS39 0501 E207 ^29 MOS39 0416 E1B6 B0 08 BCS PURNSB ;[OSWORD call so do not kill sound] MOS39 0501 E207 ^29 MOS39 0417 E1B8 BD D6 E9 LDAAX BUFTYP MOS39 0501 E207 ^29 MOS39 0418 E1BB 10 03 BPL PURNSB ;[not a sound buffer] MOS39 0501 E207 ^29 MOS39 0419 E1BD ; kill sound on channel X MOS39 0501 E207 ^29 MOS39 0420 E1BD 20 E5 EC JSR SCRST MOS39 0501 E207 ^29 MOS39 0421 E1C0 PURNSB MOS39 0501 E207 ^29 MOS39 0422 E1C0 ; MOS39 0501 E207 ^29 MOS39 0423 E1C0 ; check for input buffer MOS39 0501 E207 ^29 MOS39 0424 E1C0 E0 02 CPXIM OUTPUT MOS39 MOS39 MOS39 MOS39 Acorn macro assembler Page 78 MOS39 MOS39 CLI MOS39 MOS39 0501 E207 ^29 MOS39 0425 E1C2 B0 08 BCS VAULT ;[output buffer] MOS39 0501 E207 ^29 MOS39 0426 E1C4 ; MOS39 0501 E207 ^29 MOS39 0427 E1C4 ; input buffer, kill soft key expansion and VDU queueing MOS39 0501 E207 ^29 MOS39 0428 E1C4 ; MOS39 0501 E207 ^29 MOS39 0429 E1C4 A9 00 LDAIM ZERO MOS39 0501 E207 ^29 MOS39 0430 E1C6 8D 68 02 STA SOFKL ;kill soft key expansion MOS39 0501 E207 ^29 MOS39 0431 E1C9 8D 6A 02 STA QPOSN ;kill VDU queueing MOS39 0501 E207 ^29 MOS39 0432 E1CC ; MOS39 0501 E207 ^29 MOS39 0433 E1CC ;if input buffer OR first output buffer i.e. RS423 MOS39 0501 E207 ^29 MOS39 0434 E1CC ;then Z=1; buffer flag unused, preserve MOS39 0501 E207 ^29 MOS39 0435 E1CC F0 04 VAULT BEQ PURGE3 MOS39 0501 E207 ^29 MOS39 0436 E1CE ;otherwise C=1 MOS39 0501 E207 ^29 MOS39 0437 E1CE ; flag buffer dormant MOS39 0501 E207 ^29 MOS39 0438 E1CE 7E CF 02 RORAX BACTIV MOS39 0501 E207 ^29 MOS39 0439 E1D1 38 SEC ;pass C=1; N=1, V=1, Z=* from BIT FFBYT MOS39 0501 E207 ^29 MOS39 0440 E1D2 ; MOS39 0501 E207 ^29 MOS39 0441 E1D2 PURGE3 MOS39 0501 E207 ^29 MOS39 0442 E1D2 ; MOS39 0501 E207 ^29 MOS39 0443 E1D2 20 AF E7 JSR JMIPUR ;use indirection with V=1 (defaults to CNP) MOS39 0501 E207 ^29 MOS39 0444 E1D5 ; MOS39 0501 E207 ^29 MOS39 0445 E1D5 28 PLP ;restore interrupt state MOS39 0501 E207 ^29 MOS39 0446 E1D6 68 PLA ;restore A MOS39 0501 E207 ^29 MOS39 0447 E1D7 60 RTS MOS39 0501 E207 ^29 MOS39 0448 E1D8 ] MOS39 0501 E207 ^29 MOS39 0449 E1D8 MOS39 0501 E207 ^29 MOS39 0450 E1D8 STROBE ;send character to selected printer MOS39 0501 E207 ^29 MOS39 0451 E1D8 ; **************************************** MOS39 0501 E207 ^29 MOS39 0452 E1D8 ; MUST BE ENTERED WITH INTERRUPTS DISABLED MOS39 0501 E207 ^29 MOS39 0453 E1D8 ; ********************************** MOS39 0501 E207 ^29 MOS39 0454 E1D8 ; determine print sink MOS39 0501 E207 ^29 MOS39 0455 E1D8 AD 85 02 LDA PRNTSW MOS39 0501 E207 ^29 MOS39 0456 E1DB F0 D5 BEQ PURGE ;[ignore print request] MOS39 0501 E207 ^29 MOS39 0457 E1DD ; print sink determined by PRNTSW MOS39 0501 E207 ^29 MOS39 0458 E1DD ; 0: infinite print sink MOS39 0501 E207 ^29 MOS39 0459 E1DD ; 1: centronics MOS39 0501 E207 ^29 MOS39 0460 E1DD ; 2: RS423 output MOS39 0501 E207 ^29 MOS39 0461 E1DD ; 3: user print routine MOS39 0501 E207 ^29 MOS39 0462 E1DD ; 4: net printer server MOS39 0501 E207 ^29 MOS39 0463 E1DD [ MOS125 = &FF MOS39 0501 E207 ^29 MOS39 0466 E1DD | MOS39 0501 E207 ^29 MOS39 0467 E1DD C9 02 CMPIM PRS MOS39 0501 E207 ^29 MOS39 0468 E1DF B0 21 BCS STROB1 ;[not centronics] MOS39 0501 E207 ^29 MOS39 0469 E1E1 ] MOS39 0501 E207 ^29 MOS39 0470 E1E1 ; centronics interface MOS39 0501 E207 ^29 MOS39 0471 E1E1 ; this code must be executed with interrupts disabled MOS39 0501 E207 ^29 MOS39 0472 E1E1 ; otherwise a CA1 interrupt coinciding with the STA PAR MOS39 0501 E207 ^29 MOS39 0473 E1E1 ; would result in a spurious interrupt which would not MOS39 0501 E207 ^29 MOS39 0474 E1E1 ; be recognised, resulting in a 'Bad IRQ' state MOS39 0501 E207 ^29 MOS39 0475 E1E1 20 D8 E4 JSR REMOV ;remove character from print buffer MOS39 0501 E207 ^29 MOS39 0476 E1E4 6E D2 02 ROR PFLAG MOS39 0501 E207 ^29 MOS39 0477 E1E7 30 43 BMI STROB0 ;[no more characters to print] MOS39 0501 E207 ^29 MOS39 0478 E1E9 A0 82 LDYIM &82 MOS39 0501 E207 ^29 MOS39 0479 E1EB 8C 6E FE STY IERR ;enable parallel port printer interrupt MOS39 0501 E207 ^29 MOS39 0480 E1EE ; write character MOS39 0501 E207 ^29 MOS39 0481 E1EE 8D 61 FE STA PAR MOS39 0501 E207 ^29 MOS39 0482 E1F1 ; pulse strobe line MOS39 0501 E207 ^29 MOS39 0483 E1F1 AD 6C FE LDA PCRR MOS39 0501 E207 ^29 MOS39 0484 E1F4 29 F1 ANDIM &F1 ;********** DO NOT CHANGE MOS39 0501 E207 ^29 MOS39 0485 E1F6 09 0C ORAIM CA2LO ;********** DO NOT CHANGE MOS39 0501 E207 ^29 MOS39 0486 E1F8 8D 6C FE STA PCRR ;CA2 strobe lo (signal inverted by h/w) MOS39 0501 E207 ^29 MOS39 0487 E1FB 09 0E ORAIM CA2HI ;********** DO NOT CHANGE MOS39 0501 E207 ^29 MOS39 0488 E1FD 8D 6C FE STA PCRR ;CA2 strobe hi (signal inverted by h/w) MOS39 0501 E207 ^29 MOS39 0489 E200 ; N.B. leave signal hi MOS39 0501 E207 ^29 MOS39 0490 E200 D0 2A BNE STROB0 ;[ALWAYS jump, exit] MOS39 0501 E207 ^29 MOS39 0491 E202 MOS39 0501 E207 ^29 MOS39 0492 E202 STROB1 ;not centronics MOS39 0501 E207 ^29 MOS39 0493 E202 ; X = bufferid MOS39 0501 E207 ^29 MOS39 0494 E202 [ MOS125 = &FF MOS39 0501 E207 ^29 MOS39 0496 E202 ] MOS39 0501 E207 ^29 MOS39 0497 E202 D0 29 BNE STROB3 ;[not RS423] MOS39 0501 E207 ^29 MOS39 0498 E204 ; printer is RS423 MOS39 0501 E207 ^29 MOS39 0499 E204 A4 EA LDY RSTUT MOS39 0501 E207 ^29 MOS39 0500 E206 88 DEY MOS39 0501 E207 ^29 MOS39 0501 E207 10 A9 BPL STCRS ;[RS423 printer managed by CFS, ignore print request] MOS39 0477 E1E7 v3C MOS39 0502 E209 ; print to RS423 MOS39 0477 E1E7 v3C MOS39 0503 E209 4E D2 02 LSR PFLAG ;flag printer busy MOS39 0477 E1E7 v3C MOS39 0504 E20C ; MOS39 0477 E1E7 v3C MOS39 0505 E20C RSBUSY MOS39 0477 E1E7 v3C MOS39 0506 E20C 4E 4F 02 LSR RSFLAG ;flag RS423 busy MOS39 0477 E1E7 v3C MOS39 0507 E20F ; MOS39 0477 E1E7 v3C MOS39 0508 E20F RSETX ;enable RS423 Tx interrupts MOS39 0477 E1E7 v3C MOS39 0509 E20F 20 BF E2 JSR CNTRS MOS39 0477 E1E7 v3C MOS39 0510 E212 90 18 BCC RSOVF ;[RS423 input buffer overflow] MOS39 0477 E1E7 v3C MOS39 0511 E214 ; MOS39 0477 E1E7 v3C MOS39 0512 E214 A2 20 LDXIM RHITXE ;set RTS hi, Tx interrupt enabled MOS39 0477 E1E7 v3C MOS39 0513 E216 ; MOS39 0477 E1E7 v3C MOS39 0514 E216 RSED ;alter Tx control register to X MOS39 0477 E1E7 v3C MOS39 0515 E216 A0 9F LDYIM &9F ;field is b6-b5 MOS39 0477 E1E7 v3C MOS39 0516 E218 ; MOS39 0477 E1E7 v3C MOS39 0517 E218 RS423 MOS39 0477 E1E7 v3C MOS39 0518 E218 08 PHP MOS39 0477 E1E7 v3C MOS39 0519 E219 78 SEI MOS39 0477 E1E7 v3C MOS39 0520 E21A 98 TYA ;A := mask MOS39 0477 E1E7 v3C MOS39 0521 E21B ; ***************************************** MOS39 0477 E1E7 v3C MOS39 0522 E21B ; MUST BE EXECUTED WITH INTERRUPTS DISABLED MOS39 0477 E1E7 v3C MOS39 0523 E21B ; ***************************************** MOS39 0477 E1E7 v3C MOS39 0524 E21B ; A = mask (altered) MOS39 0477 E1E7 v3C MOS39 0525 E21B ; X = new value MOS39 0477 E1E7 v3C MOS39 0526 E21B 86 FA STX RSOP ;save new value of field MOS39 0477 E1E7 v3C MOS39 0527 E21D 2D 50 02 AND RSCTFL ;copy status and clear field for new status MOS39 0477 E1E7 v3C MOS39 0528 E220 45 FA EOR RSOP ;add in new status MOS39 0477 E1E7 v3C MOS39 0529 E222 AE 50 02 LDX RSCTFL ;X := old value MOS39 0477 E1E7 v3C MOS39 0530 E225 STARSC ;used by MC6850 N.B. does PLP RTS MOS39 0477 E1E7 v3C MOS39 0531 E225 MOS39 0477 E1E7 v3C MOS39 0532 E225 8D 50 02 STA RSCTFL ;update record of status MOS39 0477 E1E7 v3C MOS39 0533 E228 8D 08 FE STA RSCTL ;update 6850 MOS39 0477 E1E7 v3C MOS39 0534 E22B 28 PLP MOS39 0477 E1E7 v3C MOS39 0535 E22C RSOVF ;RS423 input buffer overflow MOS39 0477 E1E7 v3C MOS39 0536 E22C STROB0 MOS39 0477 E1E7 v3C MOS39 0537 E22C 60 RTS MOS39 0497 E202 v56 MOS39 0538 E22D MOS39 0497 E202 v56 MOS39 0539 E22D STROB3 ;not RS423 MOS39 0497 E202 v56 MOS39 0540 E22D MOS39 0497 E202 v56 MOS39 0541 E22D 18 CLC -- MOS39 0542 E22E -- MOS39 0543 E22E ; C=0 -- MOS39 0544 E22E ; user or net print -- MOS39 0545 E22E ; X=print_bufferid -- MOS39 0546 E22E ; character in printer buffer -- MOS39 0547 E22E A9 01 LDAIM UPWRCH -- MOS39 0548 E230 20 3E E2 JSR mUPT ;call print routine (returns with carry meaningful) MOS39 MOS39 MOS39 MOS39 Acorn macro assembler Page 79 MOS39 MOS39 CLI MOS39 -- MOS39 0549 E233 PFREE ;indicate printer dormant (OSBYTE call used by UPT routine) -- MOS39 0550 E233 6E D2 02 ROR PFLAG ;set printer status according to user print routine -- MOS39 0551 E236 ; C=0 => printer busy -- MOS39 0552 E236 ; C=1 => printer free -- MOS39 0553 E236 ; (default user print routine is DEFUPT) -- MOS39 0554 E236 UPTRTS -- MOS39 0555 E236 60 RTS MOS39 0560 E23A ^7A MOS39 0556 E237 MOS39 0560 E23A ^7A MOS39 0557 E237 MOS39 0560 E23A ^7A MOS39 0558 E237 UPTINT ;timer interrupt MOS39 0560 E23A ^7A MOS39 0559 E237 2C D2 02 BIT PFLAG MOS39 0560 E23A ^7A MOS39 0560 E23A 30 FA BMI UPTRTS ;[printer dormant] -- MOS39 0561 E23C ; -- MOS39 0562 E23C ; give a hand to polled printers -- MOS39 0563 E23C A9 00 LDAIM UPTIME -- MOS39 0564 E23E ; -- MOS39 0565 E23E MUPT ;call user print routine (also used by VDU software) -- MOS39 0566 E23E ; A = reason code ($02/$03) -- MOS39 0567 E23E A2 03 LDXIM BPRNT ;X := print buffer id -- MOS39 0568 E240 ; -- MOS39 0569 E240 UPTX ;entered by *FX5 -- MOS39 0570 E240 AC 85 02 LDY PRNTSW ;Y := current print selection -- MOS39 0571 E243 20 F5 E5 JSR JMINET ;call net print routine -- MOS39 0572 E246 6C 22 02 JMI UPTVEC ;call user print routine AND return -- MOS39 0573 E249 -- MOS39 0574 E249 -- MOS39 0575 E249 [ MOS125 = &FF -- MOS39 0618 E249 ] -- MOS39 0619 E249 ; -- MOS39 0620 E249 ; -- MOS39 0621 E249 CNP ;count buffer entries / purge buffer -- MOS39 0622 E249 [ $Tutu -- MOS39 0625 E249 | -- MOS39 0626 E249 50 07 BVC COUNT ;[count buffer entries] MOS39 0626 E249 v78 MOS39 0627 E24B ] MOS39 0626 E249 v78 MOS39 0628 E24B ; MOS39 0626 E249 v78 MOS39 0629 E24B ; purge buffer MOS39 0626 E249 v78 MOS39 0630 E24B ; MOS39 0626 E249 v78 MOS39 0631 E24B ; reset buffer pointers MOS39 0626 E249 v78 MOS39 0632 E24B ; set buffer start = buffer end MOS39 0626 E249 v78 MOS39 0633 E24B BD D8 02 LDAAX BFSTRT MOS39 0626 E249 v78 MOS39 0634 E24E 9D E1 02 STAAX BFEND MOS39 0626 E249 v78 MOS39 0635 E251 60 RTS MOS39 0626 E249 v78 MOS39 0636 E252 ; MOS39 0626 E249 v78 MOS39 0637 E252 ; MOS39 0626 E249 v78 MOS39 0638 E252 COUNT MOS39 0626 E249 v78 MOS39 0639 E252 08 PHP -- MOS39 0640 E253 78 SEI -- MOS39 0641 E254 ; -- MOS39 0642 E254 08 PHP ;save count type -- MOS39 0643 E255 ; -- MOS39 0644 E255 38 SEC -- MOS39 0645 E256 BD E1 02 LDAAX BFEND -- MOS39 0646 E259 FD D8 02 SBCAX BFSTRT -- MOS39 0647 E25C B0 04 BCS BUFNX1 MOS39 0647 E25C v7B MOS39 0648 E25E ; adjust for overflow MOS39 0647 E25C v7B MOS39 0649 E25E 38 SEC MOS39 0647 E25C v7B MOS39 0650 E25F FD BF E4 SBCAX BFORG MOS39 0647 E25C v7B MOS39 0651 E262 BUFNX1 MOS39 0647 E25C v7B MOS39 0652 E262 ; MOS39 0647 E25C v7B MOS39 0653 E262 28 PLP ;restore count type -- MOS39 0654 E263 ; -- MOS39 0655 E263 90 06 BCC BFCNT0 ;[input buffer] MOS39 0655 E263 v79 MOS39 0656 E265 ; MOS39 0655 E263 v79 MOS39 0657 E265 ; output buffer MOS39 0655 E263 v79 MOS39 0658 E265 ; adjust to give remaining entries MOS39 0655 E263 v79 MOS39 0659 E265 18 CLC MOS39 0655 E263 v79 MOS39 0660 E266 7D BF E4 ADCAX BFORG MOS39 0655 E263 v79 MOS39 0661 E269 49 FF EORIM &FF MOS39 0655 E263 v79 MOS39 0662 E26B ; MOS39 0655 E263 v79 MOS39 0663 E26B BFCNT0 MOS39 0655 E263 v79 MOS39 0664 E26B A0 00 LDYIM ZERO -- MOS39 0665 E26D AA TAX -- MOS39 0666 E26E ; -- MOS39 0667 E26E 28 PLP -- MOS39 0668 E26F 60 RTS -- MOS39 0669 E270 -- MOS39 0670 E270 -- MOS39 0671 E270 LNK MOS40 -- MOS40 0001 E270 -- MOS40 0002 E270 ; MOS40 -- MOS40 0003 E270 TTL MOS40 Machine operating system internal commands -- MOS40 0004 E270 OPT MOS40 MOS40 MOS40 MOS40 MOS40 Acorn macro assembler Page 80 MOS40 MOS40 Machine operating system internal commands MOS40 -- MOS40 0005 E270 ;(c) 1981 ACORN Computers Limited -- MOS40 0006 E270 ;BBC Microcomputer Machine Operating System (MOS) -- MOS40 0007 E270 ;Change record: -- MOS40 0008 E270 ;033 12-Aug-81 PB Reset SKNEND code, check KEY line termination -- MOS40 0009 E270 ;032 12-Aug-81 PB Extracted from CLI code -- MOS40 0010 E270 ;Author(s): -- MOS40 0011 E270 ;PB Paul Bond -- MOS40 0012 E270 ;MP Mike Prees -- MOS40 0013 E270 -- MOS40 0014 E270 -- MOS40 0015 E270 WRITE -- MOS40 0016 E270 WRITE1 -- MOS40 0017 E270 78 SEI ;another critical region MOS40 0039 E283 ^6B MOS40 0018 E271 20 28 E5 JSR INSRT ;attempt to add character to print queue MOS40 0039 E283 ^6B MOS40 0019 E274 90 0F BCC WRITE0 ;[character inserted into printer buffer] MOS40 0039 E283 ^6B MOS40 0020 E276 ; printer buffer full MOS40 0039 E283 ^6B MOS40 0021 E276 ; C=1 MOS40 0039 E283 ^6B MOS40 0022 E276 20 13 EA JSR LEDSON ;conditionally set LEDs and test escape condition MOS40 0039 E283 ^6B MOS40 0023 E279 ; N.B. does not corrupt C or X MOS40 0039 E283 ^6B MOS40 0024 E279 ; C=1 MOS40 0039 E283 ^6B MOS40 0025 E279 ; reset LEDs MOS40 0039 E283 ^6B MOS40 0026 E279 08 PHP MOS40 0039 E283 ^6B MOS40 0027 E27A 48 PHA MOS40 0039 E283 ^6B MOS40 0028 E27B 20 24 EF JSR KBDIS MOS40 0039 E283 ^6B MOS40 0029 E27E 68 PLA MOS40 0039 E283 ^6B MOS40 0030 E27F 28 PLP MOS40 0039 E283 ^6B MOS40 0031 E280 ; MOS40 0039 E283 ^6B MOS40 0032 E280 30 03 BMI WRITE0 ;[escape detected] MOS40 0039 E283 ^6B MOS40 0033 E282 58 CLI ;enable interrupts to allow printer buffer to purge. MOS40 0039 E283 ^6B MOS40 0034 E283 ; Interrupts are enabled at this part of the loop, MOS40 0039 E283 ^6B MOS40 0035 E283 ; rather than at the begining (which would save 2 bytes of code) MOS40 0039 E283 ^6B MOS40 0036 E283 ; in order to ensure that if the print routine is called with MOS40 0039 E283 ^6B MOS40 0037 E283 ; interrupts disabled, then interrupts are not enabled if there is MOS40 0039 E283 ^6B MOS40 0038 E283 ; room in the print buffer. MOS40 0039 E283 ^6B MOS40 0039 E283 B0 EB BCS WRITE1 ;[ALWAYS jump, wait for room in printer buffer, C=1] MOS40 0019 E274 v70 MOS40 0040 E285 WRITE0 MOS40 0019 E274 v70 MOS40 0041 E285 60 RTS -- MOS40 0042 E286 -- MOS40 0043 E286 -- MOS40 0044 E286 CLRFB ;clear file control block -- MOS40 0045 E286 48 PHA -- MOS40 0046 E287 A9 00 LDAIM ZERO -- MOS40 0047 E289 9D EE 02 STAAX FBLOCK -- MOS40 0048 E28C 9D EF 02 STAAX FBLOCK +&01 -- MOS40 0049 E28F 9D F0 02 STAAX FBLOCK +&02 -- MOS40 0050 E292 9D F1 02 STAAX FBLOCK +&03 -- MOS40 0051 E295 68 PLA -- MOS40 0052 E296 60 RTS -- MOS40 0053 E297 [ MOS125 = &FF -- MOS40 0076 E297 | -- MOS40 0077 E297 20 AC E0 LSA JSR SKIPSP -- MOS40 0078 E29A 20 F7 E0 JSR TSTHEX -- MOS40 0079 E29D 90 1F BCC LSA0 ;[hex not present, return V=1] MOS40 0079 E29D v60 MOS40 0080 E29F ; MOS40 0079 E29D v60 MOS40 0081 E29F ; clear field MOS40 0079 E29D v60 MOS40 0082 E29F ; MOS40 0079 E29D v60 MOS40 0083 E29F 20 86 E2 JSR CLRFB MOS40 0079 E29D v60 MOS40 0084 E2A2 ; MOS40 0079 E29D v60 MOS40 0085 E2A2 ; read address MOS40 0079 E29D v60 MOS40 0086 E2A2 ; MOS40 0079 E29D v60 MOS40 0087 E2A2 LSA1 ;rotate hex digit into 4-byte address MOS40 0079 E29D v60 MOS40 0088 E2A2 ; move nibble into high nibble MOS40 0079 E29D v60 MOS40 0089 E2A2 ;set b3, clear b2..0 MOS40 0079 E29D v60 MOS40 0090 E2A2 ;SEC ;C=1 from BCC LSA0 (CLRFB preserves) or BCS LSA1 MOS40 0079 E29D v60 MOS40 0091 E2A2 2A ROLA MOS40 0079 E29D v60 MOS40 0092 E2A3 0A ASLA MOS40 0079 E29D v60 MOS40 0093 E2A4 0A ASLA MOS40 0079 E29D v60 MOS40 0094 E2A5 0A ASLA MOS40 0079 E29D v60 MOS40 0095 E2A6 ;shift once more. C=hex b3, A b4=1, b3..0=0 MOS40 0079 E29D v60 MOS40 0096 E2A6 0A ASLA MOS40 0079 E29D v60 MOS40 0097 E2A7 ROL4A ;rotate bit into address MOS40 0079 E29D v60 MOS40 0098 E2A7 3E EE 02 ROLAX FBLOCK MOS40 0079 E29D v60 MOS40 0099 E2AA 3E EF 02 ROLAX FBLOCK +&01 MOS40 0079 E29D v60 MOS40 0100 E2AD 3E F0 02 ROLAX FBLOCK +&02 MOS40 0079 E29D v60 MOS40 0101 E2B0 3E F1 02 ROLAX FBLOCK +&03 MOS40 0079 E29D v60 MOS40 0102 E2B3 B0 42 BCS MBADHX ;[overflow] MOS40 0102 E2B3 v3D MOS40 0103 E2B5 ; C=0 MOS40 0102 E2B3 v3D MOS40 0104 E2B5 0A ASLA MOS40 0102 E2B3 v3D MOS40 0105 E2B6 D0 EF BNE ROL4A ;execute loop four times MOS40 0102 E2B3 v3D MOS40 0106 E2B8 ; C=1 which TSTHEX ignores MOS40 0102 E2B3 v3D MOS40 0107 E2B8 20 F7 E0 JSR TSTHEX MOS40 0102 E2B3 v3D MOS40 0108 E2BB B0 E5 BCS LSA1 MOS40 0102 E2B3 v3D MOS40 0109 E2BD CNTRS0 MOS40 0102 E2B3 v3D MOS40 0110 E2BD 38 SEC ;return C=1 MOS40 0102 E2B3 v3D MOS40 0111 E2BE LSA0 ;Z=1 => CR terminator MOS40 0102 E2B3 v3D MOS40 0112 E2BE 60 RTS MOS40 0102 E2B3 v3D MOS40 0113 E2BF MOS40 0102 E2B3 v3D MOS40 0114 E2BF CNTRS ;count bytes left in RS423 input buffer MOS40 0102 E2B3 v3D MOS40 0115 E2BF 38 SEC ;count empty slots left ... MOS40 0102 E2B3 v3D MOS40 0116 E2C0 A2 01 LDXIM BRSI ;... in RS423 input buffer MOS40 0102 E2B3 v3D MOS40 0117 E2C2 20 AC E7 JSR JMICNT MOS40 0102 E2B3 v3D MOS40 0118 E2C5 ; count in Y (hi) and X (lo) MOS40 0102 E2B3 v3D MOS40 0119 E2C5 98 TYA MOS40 0102 E2B3 v3D MOS40 0120 E2C6 D0 F5 BNE CNTRS0 ;[more than RSOVER bytes left] MOS40 0102 E2B3 v3D MOS40 0121 E2C8 ; MOS40 0102 E2B3 v3D MOS40 0122 E2C8 EC 5B 02 CPX RSHLVL MOS40 0102 E2B3 v3D MOS40 0123 E2CB ; MOS40 0102 E2B3 v3D MOS40 0124 E2CB ; C=0 => overflow MOS40 0102 E2B3 v3D MOS40 0125 E2CB ; C=1 => no overflow MOS40 0102 E2B3 v3D MOS40 0126 E2CB 60 RTS MOS40 0102 E2B3 v3D MOS40 0127 E2CC ] MOS40 0102 E2B3 v3D MOS40 0128 E2CC MOS40 0102 E2B3 v3D MOS40 0129 E2CC MOS40 0102 E2B3 v3D MOS40 0130 E2CC LOAD ;LOAD [load address] MOS40 0102 E2B3 v3D MOS40 0131 E2CC A9 FF LDAIM &FF MOS40 0102 E2B3 v3D MOS40 0132 E2CE SAVE ;(A=$00) SAVE [exechex] [loadhex] MOS40 0102 E2B3 v3D MOS40 0133 E2CE 86 F2 STX WORK MOS40 0102 E2B3 v3D MOS40 0134 E2D0 84 F3 STY WORK +&01 MOS40 0102 E2B3 v3D MOS40 0135 E2D2 8E EE 02 STX FBLOCK+FSTR+&0 MOS40 0102 E2B3 v3D MOS40 0136 E2D5 8C EF 02 STY FBLOCK+FSTR+&1 MOS40 0102 E2B3 v3D MOS40 0137 E2D8 [ MOS125 = &FF MOS40 0102 E2B3 v3D MOS40 0139 E2D8 ] MOS40 0102 E2B3 v3D MOS40 0140 E2D8 ; clear load address MOS40 0102 E2B3 v3D MOS40 0141 E2D8 A2 02 LDXIM FLOAD MOS40 0102 E2B3 v3D MOS40 0142 E2DA 20 86 E2 JSR CLRFB MOS40 0102 E2B3 v3D MOS40 0143 E2DD ; set lsb exec address = $FF (preparing for possible LOAD) MOS40 0102 E2B3 v3D MOS40 0144 E2DD A0 FF LDYIM &FF MOS40 0102 E2B3 v3D MOS40 0145 E2DF 8C F4 02 STY FBLOCK+FEXEC ;'use file load address' MOS40 0102 E2B3 v3D MOS40 0146 E2E2 ; set to read characters from WORK buffer MOS40 0102 E2B3 v3D MOS40 0147 E2E2 C8 INY ;Y:=0 MOS40 0102 E2B3 v3D MOS40 0148 E2E3 ; skip filename MOS40 MOS40 MOS40 MOS40 Acorn macro assembler Page 81 MOS40 MOS40 Machine operating system internal commands MOS40 MOS40 0102 E2B3 v3D MOS40 0149 E2E3 [ MOS125 = &FF MOS40 0102 E2B3 v3D MOS40 0150 E2E3 | MOS40 0102 E2B3 v3D MOS40 0151 E2E3 48 PHA MOS40 0102 E2B3 v3D MOS40 0152 E2E4 ] MOS40 0102 E2B3 v3D MOS40 0153 E2E4 20 84 EA JSR GSINTC MOS40 0102 E2B3 v3D MOS40 0154 E2E7 20 96 EA LS2 JSR GSREAD MOS40 0102 E2B3 v3D MOS40 0155 E2EA 90 FB BCC LS2 ;[string character] MOS40 0102 E2B3 v3D MOS40 0156 E2EC ; determine command type MOS40 0102 E2B3 v3D MOS40 0157 E2EC 68 PLA MOS40 0102 E2B3 v3D MOS40 0158 E2ED 48 PHA MOS40 0102 E2B3 v3D MOS40 0159 E2EE F0 4D BEQ SAVEX ;[SAVE command] MOS40 0159 E2EE v32 MOS40 0160 E2F0 ; LOAD command MOS40 0159 E2EE v32 MOS40 0161 E2F0 ; MOS40 0159 E2EE v32 MOS40 0162 E2F0 ; read load address MOS40 0159 E2EE v32 MOS40 0163 E2F0 ; N.B. X=FLOAD MOS40 0159 E2EE v32 MOS40 0164 E2F0 20 97 E2 JSR LSA MOS40 0159 E2EE v32 MOS40 0165 E2F3 B0 3B BCS LOADX1 ;hex present MOS40 0159 E2EE v32 MOS40 0166 E2F5 F0 3E BEQ LS0 ;[just CR terminator] MOS40 0159 E2EE v32 MOS40 0167 E2F7 MBADHX ;report error 'Bad address' MOS40 0159 E2EE v32 MOS40 0168 E2F7 00 BRK MOS40 0159 E2EE v32 MOS40 0169 E2F8 FC = BADADR MOS40 0159 E2EE v32 MOS40 0170 E2F9 42 61 64 = "Bad address" MOS40 0159 E2EE v32 MOS40 0171 E304 00 = ZERO ;message terminator MOS40 0159 E2EE v32 MOS40 0172 E305 MOS40 0159 E2EE v32 MOS40 0173 E305 MOS40 0159 E2EE v32 MOS40 0174 E305 SHUTES ;shut EXEC and SPOOL files MOS40 0159 E2EE v32 MOS40 0175 E305 MOS40 0159 E2EE v32 MOS40 0176 E305 ; MOS40 0159 E2EE v32 MOS40 0177 E305 ; inform paged ROMs of intentions MOS40 0159 E2EE v32 MOS40 0178 E305 ; MOS40 0159 E2EE v32 MOS40 0179 E305 A2 10 LDXIM SVSHES MOS40 0159 E2EE v32 MOS40 0180 E307 20 71 F1 JSR SVOP MOS40 0159 E2EE v32 MOS40 0181 E30A F0 23 BEQ SPOOL0 ;[claimed, do not close files] MOS40 0159 E2EE v32 MOS40 0182 E30C ; MOS40 0159 E2EE v32 MOS40 0183 E30C ; deal with EXEC file MOS40 0159 E2EE v32 MOS40 0184 E30C ; MOS40 0159 E2EE v32 MOS40 0185 E30C 20 C5 F6 JSR ECLOSE ;Close EXEC file MOS40 0159 E2EE v32 MOS40 0186 E30F ; MOS40 0159 E2EE v32 MOS40 0187 E30F ; close SPOOL file AND return MOS40 0159 E2EE v32 MOS40 0188 E30F ; MOS40 0159 E2EE v32 MOS40 0189 E30F A9 00 LDAIM ZERO ;Z=1, A=$00 MOS40 0159 E2EE v32 MOS40 0190 E311 ; MOS40 0159 E2EE v32 MOS40 0191 E311 SPOOL ;SPOOL MOS40 0159 E2EE v32 MOS40 0192 E311 ; XY -> filename MOS40 0159 E2EE v32 MOS40 0193 E311 ; A = $00 MOS40 0159 E2EE v32 MOS40 0194 E311 ; EQ -> spool off MOS40 0159 E2EE v32 MOS40 0195 E311 ;remember whether to just turn spooling off MOS40 0159 E2EE v32 MOS40 0196 E311 08 PHP MOS40 0159 E2EE v32 MOS40 0197 E312 ; close old spool file MOS40 0159 E2EE v32 MOS40 0198 E312 84 E6 STY SPOOLY ;save Y MOS40 0159 E2EE v32 MOS40 0199 E314 AC 57 02 LDY SPOOLH MOS40 0159 E2EE v32 MOS40 0200 E317 8D 57 02 STA SPOOLH ;clear spooling MOS40 0159 E2EE v32 MOS40 0201 E31A F0 03 BEQ SPOOL2 ;[not currently spooling] MOS40 0159 E2EE v32 MOS40 0202 E31C ; A=0 MOS40 0159 E2EE v32 MOS40 0203 E31C 20 CE FF JSR OSFIND ;close spool file MOS40 0159 E2EE v32 MOS40 0204 E31F SPOOL2 MOS40 0159 E2EE v32 MOS40 0205 E31F A4 E6 LDY SPOOLY ;restore Y MOS40 0159 E2EE v32 MOS40 0206 E321 28 PLP MOS40 0159 E2EE v32 MOS40 0207 E322 F0 0B BEQ SPOOL0 ;[just close spool file] MOS40 0159 E2EE v32 MOS40 0208 E324 ; open given spool file MOS40 0159 E2EE v32 MOS40 0209 E324 A9 80 LDAIM &80 ;open file for output MOS40 0159 E2EE v32 MOS40 0210 E326 20 CE FF JSR OSFIND MOS40 0159 E2EE v32 MOS40 0211 E329 A8 TAY MOS40 0159 E2EE v32 MOS40 0212 E32A F0 5D BEQ BADFX ;[open failure] MOS40 0212 E32A v22 MOS40 0213 E32C 8D 57 02 STA SPOOLH MOS40 0212 E32A v22 MOS40 0214 E32F SPOOL0 ;Z=1 MOS40 0212 E32A v22 MOS40 0215 E32F 60 RTS MOS40 0212 E32A v22 MOS40 0216 E330 MOS40 0212 E32A v22 MOS40 0217 E330 MOS40 0212 E32A v22 MOS40 0218 E330 LOADX1 ;explicit load address given MOS40 0212 E32A v22 MOS40 0219 E330 D0 57 BNE BADFX ;[no CR terminator] MOS40 0212 E32A v22 MOS40 0220 E332 EE F4 02 INC FBLOCK+FEXEC ;use explicit load address MOS40 0212 E32A v22 MOS40 0221 E335 LS0 ;load file MOS40 0212 E32A v22 MOS40 0222 E335 A2 EE LDXIM FBLOCK MOS40 0212 E32A v22 MOS40 0223 E337 A0 02 LDYIM /(FBLOCK ) MOS40 0212 E32A v22 MOS40 0224 E339 68 PLA MOS40 0212 E32A v22 MOS40 0225 E33A 4C DD FF JMP OSFILE MOS40 0212 E32A v22 MOS40 0226 E33D ; MOS40 0212 E32A v22 MOS40 0227 E33D [ MOS125 = &FF MOS40 0212 E32A v22 MOS40 0244 E33D ] MOS40 0212 E32A v22 MOS40 0245 E33D ; MOS40 0212 E32A v22 MOS40 0246 E33D ; MOS40 0212 E32A v22 MOS40 0247 E33D SAVEX ;SAVE command MOS40 0212 E32A v22 MOS40 0248 E33D ; MOS40 0212 E32A v22 MOS40 0249 E33D ; read FROM address MOS40 0212 E32A v22 MOS40 0250 E33D ; MOS40 0212 E32A v22 MOS40 0251 E33D A2 0A LDXIM FFROM MOS40 0212 E32A v22 MOS40 0252 E33F 20 97 E2 JSR LSA MOS40 0212 E32A v22 MOS40 0253 E342 90 45 BCC BADFX MOS40 0212 E32A v22 MOS40 0254 E344 ; MOS40 0212 E32A v22 MOS40 0255 E344 ; read TO address MOS40 0212 E32A v22 MOS40 0256 E344 ; check if preceeded by '+' MOS40 0212 E32A v22 MOS40 0257 E344 ; MOS40 0212 E32A v22 MOS40 0258 E344 [ MOS125 = &FF MOS40 0212 E32A v22 MOS40 0264 E344 | MOS40 0212 E32A v22 MOS40 0265 E344 B1 F2 LDAIY WORK MOS40 0212 E32A v22 MOS40 0266 E346 49 AB EORIM "+":EOR:&80 MOS40 0212 E32A v22 MOS40 0267 E348 69 FE ADCIM &FE ;c=1, set V iff symbol='+' MOS40 0212 E32A v22 MOS40 0268 E34A 50 01 BVC SAVEX3 ;['+' not present] MOS40 0212 E32A v22 MOS40 0269 E34C ] MOS40 0212 E32A v22 MOS40 0270 E34C C8 INY ;skip '+' symbol MOS40 0212 E32A v22 MOS40 0271 E34D SAVEX3 MOS40 0212 E32A v22 MOS40 0272 E34D A2 0E LDXIM FTO MOS40 0212 E32A v22 MOS40 0273 E34F 20 97 E2 JSR LSA ;N.B. does not corrupt V MOS40 0212 E32A v22 MOS40 0274 E352 90 35 BCC BADFX ;[to address not given] MOS40 0212 E32A v22 MOS40 0275 E354 ; C=1 MOS40 0212 E32A v22 MOS40 0276 E354 08 PHP ;Z => no exec address MOS40 0212 E32A v22 MOS40 0277 E355 ; if '+' was specified then the TO address was really MOS40 0212 E32A v22 MOS40 0278 E355 ; a length specification MOS40 0212 E32A v22 MOS40 0279 E355 50 0F BVC SAVEX4 ;['+' not specified] MOS40 0212 E32A v22 MOS40 0280 E357 ; convert length to end address MOS40 0212 E32A v22 MOS40 0281 E357 ; N.B. C=1 MOS40 0212 E32A v22 MOS40 0282 E357 00FC MINUS4 * &00FC MOS40 0212 E32A v22 MOS40 0283 E357 A2 FC LDXIM MINUS4 MOS40 0212 E32A v22 MOS40 0284 E359 18 CLC MOS40 0212 E32A v22 MOS40 0285 E35A SAVEX5 MOS40 0212 E32A v22 MOS40 0286 E35A BD FC 01 LDAAX FBLOCK+FFROM-MINUS4 MOS40 0212 E32A v22 MOS40 0287 E35D 7D 00 02 ADCAX FBLOCK+FTO-MINUS4 MOS40 0212 E32A v22 MOS40 0288 E360 9D 00 02 STAAX FBLOCK+FTO-MINUS4 MOS40 0212 E32A v22 MOS40 0289 E363 E8 INX MOS40 0212 E32A v22 MOS40 0290 E364 D0 F4 BNE SAVEX5 ;[execute loop four times] MOS40 MOS40 MOS40 MOS40 Acorn macro assembler Page 82 MOS40 MOS40 Machine operating system internal commands MOS40 MOS40 0212 E32A v22 MOS40 0291 E366 SAVEX4 ;copy 'from' address to execute and load fields MOS40 0212 E32A v22 MOS40 0292 E366 A2 03 LDXIM &03 MOS40 0212 E32A v22 MOS40 0293 E368 SAVEX1 MOS40 0212 E32A v22 MOS40 0294 E368 BD F8 02 LDAAX FBLOCK+FFROM MOS40 0212 E32A v22 MOS40 0295 E36B 9D F4 02 STAAX FBLOCK+FEXEC MOS40 0212 E32A v22 MOS40 0296 E36E 9D F0 02 STAAX FBLOCK+FLOAD MOS40 0212 E32A v22 MOS40 0297 E371 CA DEX MOS40 0212 E32A v22 MOS40 0298 E372 10 F4 BPL SAVEX1 MOS40 0212 E32A v22 MOS40 0299 E374 ; check if exec address present MOS40 0212 E32A v22 MOS40 0300 E374 28 PLP MOS40 0212 E32A v22 MOS40 0301 E375 F0 BE BEQ LS0 ;[no exec address] MOS40 0212 E32A v22 MOS40 0302 E377 ; read exec address MOS40 0212 E32A v22 MOS40 0303 E377 A2 06 LDXIM FEXEC MOS40 0212 E32A v22 MOS40 0304 E379 20 97 E2 JSR LSA MOS40 0212 E32A v22 MOS40 0305 E37C 90 0B BCC BADFX ;[expected exec address not found] MOS40 0212 E32A v22 MOS40 0306 E37E F0 B5 BEQ LS0 ;[no following load address] MOS40 0212 E32A v22 MOS40 0307 E380 ; read load address MOS40 0212 E32A v22 MOS40 0308 E380 A2 02 LDXIM FLOAD MOS40 0212 E32A v22 MOS40 0309 E382 20 97 E2 JSR LSA MOS40 0212 E32A v22 MOS40 0310 E385 90 02 BCC BADFX ;[expected load address not found] MOS40 0212 E32A v22 MOS40 0311 E387 F0 AC BEQ LS0 ;[good line termination] MOS40 0212 E32A v22 MOS40 0312 E389 BADFX MOS40 0212 E32A v22 MOS40 0313 E389 MBDCMD MOS40 0212 E32A v22 MOS40 0314 E389 00 BRK ;report error 'Bad command' MOS40 0410 E3D2 ^35 MOS40 0315 E38A FE = BADCMD MOS40 0410 E3D2 ^35 MOS40 0316 E38B 42 61 64 = "Bad command" MOS40 0410 E3D2 ^35 MOS40 0317 E396 00 BADKEY BRK ;report error 'Bad KEY' / end of preceeding error message MOS40 0465 E400 ^14 MOS40 0318 E397 FB = BADKY MOS40 0465 E400 ^14 MOS40 0319 E398 42 61 64 = "Bad key" MOS40 0465 E400 ^14 MOS40 0320 E39F 00 = ZERO ;message terminator MOS40 0465 E400 ^14 MOS40 0321 E3A0 MOS40 0465 E400 ^14 MOS40 0322 E3A0 [ MOS125 = &FF MOS40 0465 E400 ^14 MOS40 0354 E3A0 ] MOS40 0465 E400 ^14 MOS40 0355 E3A0 MOS40 0465 E400 ^14 MOS40 0356 E3A0 MOS40 0465 E400 ^14 MOS40 0357 E3A0 MOS40 0465 E400 ^14 MOS40 0358 E3A0 FX ;*FX x,y MOS40 0465 E400 ^14 MOS40 0359 E3A0 20 C0 E0 JSR GETNUM ;read FX function code MOS40 0465 E400 ^14 MOS40 0360 E3A3 90 E4 BCC BADFX ;[bad FX number] MOS40 0465 E400 ^14 MOS40 0361 E3A5 ; MOS40 0465 E400 ^14 MOS40 0362 E3A5 ; N.B. C=1 MOS40 0465 E400 ^14 MOS40 0363 E3A5 ; push function code MOS40 0465 E400 ^14 MOS40 0364 E3A5 ; MOS40 0465 E400 ^14 MOS40 0365 E3A5 8A TXA MOS40 0465 E400 ^14 MOS40 0366 E3A6 FXN ;entry point used by CLI, C=0 MOS40 0465 E400 ^14 MOS40 0367 E3A6 48 PHA MOS40 0465 E400 ^14 MOS40 0368 E3A7 A9 00 LDAIM ZERO ;set default argument values MOS40 0465 E400 ^14 MOS40 0369 E3A9 85 E5 STA FXREGX MOS40 0465 E400 ^14 MOS40 0370 E3AB 85 E4 STA FXREGY MOS40 0465 E400 ^14 MOS40 0371 E3AD ; MOS40 0465 E400 ^14 MOS40 0372 E3AD ; check for line end MOS40 0465 E400 ^14 MOS40 0373 E3AD ; MOS40 0465 E400 ^14 MOS40 0374 E3AD 20 B5 E0 JSR SKPCM ;N.B. C=0 => just check for line end MOS40 0465 E400 ^14 MOS40 0375 E3B0 ; MOS40 0465 E400 ^14 MOS40 0376 E3B0 ; C=1 => skip an optional comma and check for line end MOS40 0465 E400 ^14 MOS40 0377 E3B0 ; MOS40 0465 E400 ^14 MOS40 0378 E3B0 F0 18 BEQ FX1 ;[line end, just a function code] MOS40 0465 E400 ^14 MOS40 0379 E3B2 ; MOS40 0465 E400 ^14 MOS40 0380 E3B2 ; try reading another argument MOS40 0465 E400 ^14 MOS40 0381 E3B2 ; MOS40 0465 E400 ^14 MOS40 0382 E3B2 20 C0 E0 JSR GETNUM MOS40 0465 E400 ^14 MOS40 0383 E3B5 90 D2 BCC BADFX ;[bad FX number] MOS40 0465 E400 ^14 MOS40 0384 E3B7 ; MOS40 0465 E400 ^14 MOS40 0385 E3B7 ; N.B. C=1 MOS40 0465 E400 ^14 MOS40 0386 E3B7 ; MOS40 0465 E400 ^14 MOS40 0387 E3B7 86 E5 STX FXREGX MOS40 0465 E400 ^14 MOS40 0388 E3B9 ; MOS40 0465 E400 ^14 MOS40 0389 E3B9 ; check for line end MOS40 0465 E400 ^14 MOS40 0390 E3B9 ; MOS40 0465 E400 ^14 MOS40 0391 E3B9 20 B7 E0 JSR SKPCOM MOS40 0465 E400 ^14 MOS40 0392 E3BC F0 0C BEQ FX1 MOS40 0465 E400 ^14 MOS40 0393 E3BE ; MOS40 0465 E400 ^14 MOS40 0394 E3BE ; try reading another argument MOS40 0465 E400 ^14 MOS40 0395 E3BE ; MOS40 0465 E400 ^14 MOS40 0396 E3BE 20 C0 E0 JSR GETNUM MOS40 0465 E400 ^14 MOS40 0397 E3C1 90 C6 BCC BADFX ;[bad FX number] MOS40 0465 E400 ^14 MOS40 0398 E3C3 86 E4 STX FXREGY MOS40 0465 E400 ^14 MOS40 0399 E3C5 ; MOS40 0465 E400 ^14 MOS40 0400 E3C5 ; ensure line end MOS40 0465 E400 ^14 MOS40 0401 E3C5 ; MOS40 0465 E400 ^14 MOS40 0402 E3C5 20 AC E0 JSR SKIPSP MOS40 0465 E400 ^14 MOS40 0403 E3C8 D0 BF BNE BADFX ;[bad command termination] MOS40 0465 E400 ^14 MOS40 0404 E3CA ; MOS40 0465 E400 ^14 MOS40 0405 E3CA FX1 MOS40 0465 E400 ^14 MOS40 0406 E3CA A4 E4 LDY FXREGY ;load OSBYTE arguments MOS40 0465 E400 ^14 MOS40 0407 E3CC A6 E5 LDX FXREGX MOS40 0465 E400 ^14 MOS40 0408 E3CE 68 PLA MOS40 0465 E400 ^14 MOS40 0409 E3CF 20 F4 FF JSR OSBYTE MOS40 0465 E400 ^14 MOS40 0410 E3D2 70 B5 BVS BADFX ;[unrecognised FX code] MOS40 0465 E400 ^14 MOS40 0411 E3D4 [ MOS125 = &FF MOS40 0465 E400 ^14 MOS40 0412 E3D4 | MOS40 0465 E400 ^14 MOS40 0413 E3D4 KEYZAP MOS40 0465 E400 ^14 MOS40 0414 E3D4 ] MOS40 0465 E400 ^14 MOS40 0415 E3D4 60 RTS MOS40 0465 E400 ^14 MOS40 0416 E3D5 MOS40 0465 E400 ^14 MOS40 0417 E3D5 MOS40 0465 E400 ^14 MOS40 0418 E3D5 [ MOS125 = &FF MOS40 0465 E400 ^14 MOS40 0419 E3D5 | MOS40 0465 E400 ^14 MOS40 0420 E3D5 KEY ;KEY MOS40 0465 E400 ^14 MOS40 0421 E3D5 20 C0 E0 JSR GETNUM MOS40 0465 E400 ^14 MOS40 0422 E3D8 90 BC BCC BADKEY ;[bad soft key number (>255)] MOS40 0465 E400 ^14 MOS40 0423 E3DA ; A = character delimiting number MOS40 0465 E400 ^14 MOS40 0424 E3DA ; X = NUMBER = CSKEY = key number MOS40 0465 E400 ^14 MOS40 0425 E3DA ; Y = soft key number argument MOS40 0465 E400 ^14 MOS40 0426 E3DA ; check soft key number range MOS40 0465 E400 ^14 MOS40 0427 E3DA E0 10 CPXIM NSOFTK MOS40 0465 E400 ^14 MOS40 0428 E3DC B0 B8 BCS BADKEY ;[soft_key_number > number of soft keys - 1] MOS40 0465 E400 ^14 MOS40 0429 E3DE ; key number in range 0 to NSOFTK-1 MOS40 0465 E400 ^14 MOS40 0430 E3DE ; MOS40 0465 E400 ^14 MOS40 0431 E3DE [ FALSE=0 MOS40 0465 E400 ^14 MOS40 0434 E3DE ] MOS40 0465 E400 ^14 MOS40 0435 E3DE ; MOS40 0465 E400 ^14 MOS40 0436 E3DE 20 B7 E0 JSR SKPCOM ;skip optional spaces and an optional comma MOS40 0465 E400 ^14 MOS40 0437 E3E1 08 PHP ;save line end status MOS40 0465 E400 ^14 MOS40 0438 E3E2 AE 10 0B LDX SKEND ;Y points to unused portion of soft key buffer area MOS40 0465 E400 ^14 MOS40 0439 E3E5 ; (set to reset SKNEND as it might have been set as a result MOS40 0465 E400 ^14 MOS40 0440 E3E5 ; of a 'KEY in use' error) MOS40 0465 E400 ^14 MOS40 0441 E3E5 98 TYA MOS40 0465 E400 ^14 MOS40 0442 E3E6 48 PHA MOS40 0465 E400 ^14 MOS40 0443 E3E7 20 49 E4 JSR SKGCR ;delete soft key (uses value in X) MOS40 0465 E400 ^14 MOS40 0444 E3EA ; on exit X = SKEND MOS40 MOS40 MOS40 MOS40 Acorn macro assembler Page 83 MOS40 MOS40 Machine operating system internal commands MOS40 MOS40 0465 E400 ^14 MOS40 0445 E3EA 68 PLA MOS40 0465 E400 ^14 MOS40 0446 E3EB A8 TAY MOS40 0465 E400 ^14 MOS40 0447 E3EC 28 PLP ;restore line end status MOS40 0465 E400 ^14 MOS40 0448 E3ED F0 E5 BEQ KEYZAP ; end of line - specified soft key value value has been deleted so return MOS40 0465 E400 ^14 MOS40 0449 E3EF ] MOS40 0465 E400 ^14 MOS40 0450 E3EF CLI1 MOS40 0465 E400 ^14 MOS40 0451 E3EF 38 SEC MOS40 0465 E400 ^14 MOS40 0452 E3F0 20 85 EA JSR GSINTS ;initialise for reading quoted string MOS40 0465 E400 ^14 MOS40 0453 E3F3 CLIWP MOS40 0465 E400 ^14 MOS40 0454 E3F3 20 96 EA JSR GSREAD ;read string character MOS40 0465 E400 ^14 MOS40 0455 E3F6 B0 08 BCS CLIY ;end of string MOS40 0465 E400 ^14 MOS40 0456 E3F8 E8 INX MOS40 0465 E400 ^14 MOS40 0457 E3F9 F0 9B BEQ BADKEY ;[buffer full, (N.B. buffer assumed to be 256 bytes long)] MOS40 0465 E400 ^14 MOS40 0458 E3FB ; buffer not full MOS40 0465 E400 ^14 MOS40 0459 E3FB 9D 00 0B STAAX SKBUF -&01 ;store character in soft key buffer MOS40 0465 E400 ^14 MOS40 0460 E3FE ;(N.B. note offset of -1) MOS40 0465 E400 ^14 MOS40 0461 E3FE 90 F3 BCC CLIWP ;[ALWAYS jump, go process next character] MOS40 0465 E400 ^14 MOS40 0462 E400 ; SOFT KEY FINAL CHECK TO SEE IF ANY OTHER KEY SHARES SAME MOS40 0465 E400 ^14 MOS40 0463 E400 ; VALUE POINTER - IF IT DOES THEN SET IT EQUAL TO SKEND MOS40 0465 E400 ^14 MOS40 0464 E400 CLIY MOS40 0465 E400 ^14 MOS40 0465 E400 D0 94 BNE BADKEY ;[string not terminated by CR] -- MOS40 0466 E402 ; N.B. new buffer end in X -- MOS40 0467 E402 08 PHP -- MOS40 0468 E403 78 SEI ;** DISABLE INTERRUPTS ** -- MOS40 0469 E404 20 49 E4 JSR SKGCR ;delete old soft key and replace with new value (uses value in X) -- MOS40 0470 E407 ;N.B. sets Y to specified soft key number -- MOS40 0471 E407 A2 10 LDXIM NSOFTK ;X to be roving soft key number -- MOS40 0472 E409 CLIYP -- MOS40 0473 E409 E4 E6 CPX CSKEY MOS40 0482 E41C ^6B MOS40 0474 E40B F0 0E BEQ CLIYQ ;[do not process specified soft key] MOS40 0482 E41C ^6B MOS40 0475 E40D BD 00 0B LDAAX SKPTR MOS40 0482 E41C ^6B MOS40 0476 E410 D9 00 0B CMPAY SKPTR ;compare soft key buffer pointers MOS40 0482 E41C ^6B MOS40 0477 E413 D0 06 BNE CLIYQ ;[pointers differ] MOS40 0482 E41C ^6B MOS40 0478 E415 AD 10 0B LDA SKEND MOS40 0482 E41C ^6B MOS40 0479 E418 9D 00 0B STAAX SKPTR ;update soft key buffer pointer MOS40 0482 E41C ^6B MOS40 0480 E41B CLIYQ MOS40 0482 E41C ^6B MOS40 0481 E41B CA DEX MOS40 0482 E41C ^6B MOS40 0482 E41C 10 EB BPL CLIYP ;[go process next soft key] -- MOS40 0483 E41E 28 PLP ;** ENABLE INTERRUPTS ** -- MOS40 0484 E41F 60 RTS -- MOS40 0485 E420 -- MOS40 0486 E420 -- MOS40 0487 E420 SKSIZE ;A := size of soft key given by Y -- MOS40 0488 E420 ; ** THIS MODULE DISABLES INTERRUPTS ** -- MOS40 0489 E420 ; this routine is called by soft key set (via *KEY command) -- MOS40 0490 E420 ; and soft key read (via RDCH processing). -- MOS40 0491 E420 ; the choice is to duplicate the code, using a distinct work slot, -- MOS40 0492 E420 ; or share the code within a critical region in order that SKSZWK -- MOS40 0493 E420 ; may be shared -- MOS40 0494 E420 08 PHP ;save interrupt state -- MOS40 0495 E421 78 SEI ;** DISABLE INTERRUPTS ** -- MOS40 0496 E422 AD 10 0B LDA SKEND -- MOS40 0497 E425 38 SEC -- MOS40 0498 E426 F9 00 0B SBCAY SKPTR -- MOS40 0499 E429 85 FB STA SKSZWK ;SKSZWK := number of bytes to end of buffer -- MOS40 0500 E42B 8A TXA -- MOS40 0501 E42C 48 PHA ;push X -- MOS40 0502 E42D A2 10 LDXIM NSOFTK ;X is roving soft key number -- MOS40 0503 E42F SKS1 -- MOS40 0504 E42F BD 00 0B LDAAX SKPTR MOS40 0513 E441 ^6C MOS40 0505 E432 38 SEC MOS40 0513 E441 ^6C MOS40 0506 E433 F9 00 0B SBCAY SKPTR ;A := length of soft key w.r.t. specified soft key MOS40 0513 E441 ^6C MOS40 0507 E436 90 08 BCC SKS2 ;[ignore negative length] MOS40 0513 E441 ^6C MOS40 0508 E438 F0 06 BEQ SKS2 ;[ignore zero length] MOS40 0513 E441 ^6C MOS40 0509 E43A C5 FB CMP SKSZWK MOS40 0513 E441 ^6C MOS40 0510 E43C B0 02 BCS SKS2 ;[this length >= past lengths] MOS40 0513 E441 ^6C MOS40 0511 E43E 85 FB STA SKSZWK ;remember new minimum length MOS40 0513 E441 ^6C MOS40 0512 E440 CA SKS2 DEX MOS40 0513 E441 ^6C MOS40 0513 E441 10 EC BPL SKS1 ;[go process next soft key] -- MOS40 0514 E443 68 PLA -- MOS40 0515 E444 AA TAX ;restore X -- MOS40 0516 E445 A5 FB LDA SKSZWK -- MOS40 0517 E447 28 PLP ;** RESTORE INTERRUPT STATE ** -- MOS40 0518 E448 ; A := length of soft key string -- MOS40 0519 E448 ; Y := soft key number given on entry -- MOS40 0520 E448 60 RTS -- MOS40 0521 E449 -- MOS40 0522 E449 -- MOS40 0523 E449 ; SOFT KEY BUFFER GARBAGE COLLECTION ROUTINE.STRING -- MOS40 0524 E449 ; FOR KEY NUMBER GIVEN IN 'CSKEY' IS DELETED & ALL -- MOS40 0525 E449 ; POINTERS ADJUSTED ACC -- MOS40 0526 E449 SKGCR ;delete (and insert) key value(s) -- MOS40 0527 E449 ;** THIS MODULE DISABLES INTERRUPTS ** -- MOS40 0528 E449 08 PHP ;** SAVE INTERRUPT STATE OF CALLER ** -- MOS40 0529 E44A 78 SEI ;** DISABLE INTERRUPTS ** -- MOS40 0530 E44B ; save new end address -- MOS40 0531 E44B 8A TXA -- MOS40 0532 E44C 48 PHA -- MOS40 0533 E44D A4 E6 LDY CSKEY ;Y is specified soft key number -- MOS40 0534 E44F 20 20 E4 JSR SKSIZE ;A := length of soft key string -- MOS40 0535 E452 ; NOW SKSZWK = LENGTH OF CURRENT SK STRING -- MOS40 0536 E452 ; SO SETUP FOR DELETING THIS STRING. -- MOS40 0537 E452 B9 00 0B LDAAY SKPTR -- MOS40 0538 E455 A8 TAY ;Y points to specified soft key string -- MOS40 0539 E456 18 CLC -- MOS40 0540 E457 65 FB ADC SKSZWK -- MOS40 0541 E459 AA TAX ;X points to start of byte area to be moved down -- MOS40 0542 E45A 85 FA STA KEYSV -- MOS40 0543 E45C ; TO AVOID MASHING POINTER STRUCTURE IF -- MOS40 0544 E45C ; MACHINE CRASHES ELSEWHERE,IT IS ESSENTIAL -- MOS40 0545 E45C ; THAT INTERRUPTS ARE *OFF* FOR THIS NEXT BIT -- MOS40 0546 E45C ; before altering the data structure, check that a soft key -- MOS40 0547 E45C ; is not being used by RDCH -- MOS40 0548 E45C AD 68 02 LDA SOFKL ;A := length of soft key in use by RDCH -- MOS40 0549 E45F F0 0D BEQ SK3 ;[no soft key in use] MOS40 0549 E45F v72 MOS40 0550 E461 ; soft key being 'unwound' by RDCH MOS40 0549 E45F v72 MOS40 0551 E461 ; N.B. altering the data structure would confuse RDCH MOS40 0549 E45F v72 MOS40 0552 E461 00 BRK ;report error 'KEY in use' MOS40 0549 E45F v72 MOS40 0553 E462 FA = KEYUSE MOS40 0549 E45F v72 MOS40 0554 E463 4B 65 79 = "Key in use" MOS40 0549 E45F v72 MOS40 0555 E46D 00 = ZERO ;end of error message MOS40 0549 E45F v72 MOS40 0556 E46E MOS40 0549 E45F v72 MOS40 0557 E46E SK3 MOS40 0549 E45F v72 MOS40 0558 E46E CE 84 02 DEC USKFLG ;indicate update of soft keys in progress (USKFLG<>0) -- MOS40 0559 E471 68 PLA ;A := new end of buffer -- MOS40 0560 E472 38 SEC -- MOS40 0561 E473 E5 FA SBC KEYSV -- MOS40 0562 E475 85 FA STA KEYSV ;KEYSV := number of bytes to copy -- MOS40 0563 E477 F0 0C BEQ SKGCV ;[zero bytes to copy] MOS40 0563 E477 v73 MOS40 0564 E479 SKGCS MOS40 0563 E477 v73 MOS40 0565 E479 BD 01 0B LDAAX SKBUF ;*MOVE MOS40 MOS40 MOS40 MOS40 Acorn macro assembler Page 84 MOS40 MOS40 Machine operating system internal commands MOS40 MOS40 0563 E477 v73 MOS40 0566 E47C 99 01 0B STAAY SKBUF ;*CHARACTERS MOS40 0563 E477 v73 MOS40 0567 E47F C8 INY MOS40 0563 E477 v73 MOS40 0568 E480 E8 INX MOS40 0563 E477 v73 MOS40 0569 E481 C6 FA DEC KEYSV MOS40 0563 E477 v73 MOS40 0570 E483 D0 F4 BNE SKGCS ;[more bytes to copy] MOS40 0563 E477 v73 MOS40 0571 E485 ; NOW ADJUST ALL POINTERS WHICH ARE GREATER MOS40 0563 E477 v73 MOS40 0572 E485 ; THAN THE ONE AT CSKEY. MOS40 0563 E477 v73 MOS40 0573 E485 SKGCV MOS40 0563 E477 v73 MOS40 0574 E485 ; save new end address MOS40 0563 E477 v73 MOS40 0575 E485 98 TYA -- MOS40 0576 E486 48 PHA -- MOS40 0577 E487 A4 E6 LDY CSKEY ;Y is specified soft key number -- MOS40 0578 E489 A2 10 LDXIM NSOFTK ;X is roving soft key number, including end pointer -- MOS40 0579 E48B SKGCT -- MOS40 0580 E48B BD 00 0B LDAAX SKPTR MOS40 0594 E49B ^6E MOS40 0581 E48E D9 00 0B CMPAY SKPTR MOS40 0594 E49B ^6E MOS40 0582 E491 90 07 BCC SKGCU ;[current pointer precedes specified pointer] MOS40 0594 E49B ^6E MOS40 0583 E493 [ TRUE=0 MOS40 0594 E49B ^6E MOS40 0584 E493 F0 05 BEQ SKGCU ;[current pointer equals specified pointer] MOS40 0594 E49B ^6E MOS40 0585 E495 ] MOS40 0594 E49B ^6E MOS40 0586 E495 ; current pointer is beyond specified pointer MOS40 0594 E49B ^6E MOS40 0587 E495 ; if pointers are equal then specified soft key was null ... MOS40 0594 E49B ^6E MOS40 0588 E495 ; ... therefore its size was zero and a drop thru is a no-operation MOS40 0594 E49B ^6E MOS40 0589 E495 ; C=1 MOS40 0594 E49B ^6E MOS40 0590 E495 E5 FB SBC SKSZWK ;C already 1 MOS40 0594 E49B ^6E MOS40 0591 E497 9D 00 0B STAAX SKPTR ;adjust current buffer pointer MOS40 0594 E49B ^6E MOS40 0592 E49A SKGCU MOS40 0594 E49B ^6E MOS40 0593 E49A CA DEX MOS40 0594 E49B ^6E MOS40 0594 E49B 10 EE BPL SKGCT ;[go process next soft key] -- MOS40 0595 E49D ; NOW UPDATE CURRENT KEY POINTER -- MOS40 0596 E49D AD 10 0B LDA SKEND -- MOS40 0597 E4A0 99 00 0B STAAY SKPTR ;adjust specified soft key pointer to point to end of buffer -- MOS40 0598 E4A3 68 PLA ;A := new end address -- MOS40 0599 E4A4 8D 10 0B STA SKEND ;make end buffer pointers equal -- MOS40 0600 E4A7 AA TAX ;X := new end of buffer pointer -- MOS40 0601 E4A8 EE 84 02 INC USKFLG ;indicate update of soft keys over (USKFLG=0) -- MOS40 0602 E4AB 28 PLP ;** RESTORE INTERRUPT STATE OF CALLER ** -- MOS40 0603 E4AC ; X = SKEND -- MOS40 0604 E4AC ; Y = specified soft key number -- MOS40 0605 E4AC 60 RTS -- MOS40 0606 E4AD LNK MOS42 -- MOS42 0001 E4AD -- MOS42 0002 E4AD ; > MOS42 -- MOS42 0003 E4AD TTL MOS42 Buffer management -- MOS42 0004 E4AD OPT MOS42 MOS42 MOS42 MOS42 MOS42 Acorn macro assembler Page 85 MOS42 MOS42 Buffer management MOS42 -- MOS42 0005 E4AD ;(c) 1981 ACORN Computers Limited -- MOS42 0006 E4AD ;BBC Microcomputer Machine Operating System (MOS) -- MOS42 0007 E4AD ;Change record: -- MOS42 0008 E4AD ;201 01-May-82 PB EVENT restores A -- MOS42 0009 E4AD ;004 29-Jul-81 MP Prototype version -- MOS42 0010 E4AD ;Author(s): -- MOS42 0011 E4AD ;PB Paul Bond -- MOS42 0012 E4AD ;MP Mike Prees -- MOS42 0013 E4AD ; buffer address table (hi byte) -- MOS42 0014 E4AD BFADHI -- MOS42 0015 E4AD 03 = /(RDCHBF+RDCHSZ-&0100 ) -- MOS42 0016 E4AE 0A = /(RSRIBF+RSRISZ-&0100 ) -- MOS42 0017 E4AF 08 = /(RSROBF+RSROSZ-&0100 ) -- MOS42 0018 E4B0 07 = /(PRNBF+PRNSZ-&0100 ) -- MOS42 0019 E4B1 07 = /(SNDBF1+SBSIZE-&0100 ) -- MOS42 0020 E4B2 07 = /(SNDBF2+SBSIZE-&0100 ) -- MOS42 0021 E4B3 07 = /(SNDBF3+SBSIZE-&0100 ) -- MOS42 0022 E4B4 07 = /(SNDBF4+SBSIZE-&0100 ) -- MOS42 0023 E4B5 09 = /(SPCHBF+SPCHSZ-&0100 ) -- MOS42 0024 E4B6 ; buffer address table (lo byte) -- MOS42 0025 E4B6 BFADLO -- MOS42 0026 E4B6 00 = RDCHBF+RDCHSZ-&0100 ;RDCH (keyboard) buffer -- MOS42 0027 E4B7 00 = RSRIBF+RSRISZ-&0100 ;RS423 input -- MOS42 0028 E4B8 C0 = RSROBF+RSROSZ-&0100 ;RS423 output -- MOS42 0029 E4B9 C0 = PRNBF+PRNSZ-&0100 ;print -- MOS42 0030 E4BA 50 = SNDBF1+SBSIZE-&0100 ;sound channel 1 -- MOS42 0031 E4BB 60 = SNDBF2+SBSIZE-&0100 ;sound channel 2 -- MOS42 0032 E4BC 70 = SNDBF3+SBSIZE-&0100 ;sound channel 3 -- MOS42 0033 E4BD 80 = SNDBF4+SBSIZE-&0100 ;sound channel 4 -- MOS42 0034 E4BE 00 = SPCHBF+SPCHSZ-&0100 ;speech -- MOS42 0035 E4BF ; buffer origin offsets within page -- MOS42 0036 E4BF BFORG -- MOS42 0037 E4BF E0 = &0100-RDCHSZ -- MOS42 0038 E4C0 00 = &0100-RSRISZ -- MOS42 0039 E4C1 40 = &0100-RSROSZ -- MOS42 0040 E4C2 C0 = &0100-PRNSZ -- MOS42 0041 E4C3 F0 = &0100-SBSIZE -- MOS42 0042 E4C4 F0 = &0100-SBSIZE -- MOS42 0043 E4C5 F0 = &0100-SBSIZE -- MOS42 0044 E4C6 F0 = &0100-SBSIZE -- MOS42 0045 E4C7 C0 = &0100-SPCHSZ -- MOS42 0046 E4C8 ; general buffer manipulation routines -- MOS42 0047 E4C8 SETBUF -- MOS42 0048 E4C8 ; set buffer pointer -- MOS42 0049 E4C8 BD B6 E4 LDAAX BFADLO -- MOS42 0050 E4CB 85 FA STA BUFFLO -- MOS42 0051 E4CD BD AD E4 LDAAX BFADHI -- MOS42 0052 E4D0 85 FB STA BUFFHI -- MOS42 0053 E4D2 60 RTS -- MOS42 0054 E4D3 -- MOS42 0055 E4D3 -- MOS42 0056 E4D3 EXAM ;examine character in buffer -- MOS42 0057 E4D3 2C 50 D9 BIT FFBYT ;V=1 => examine option -- MOS42 0058 E4D6 70 01 BVS EXAM1 ;[ALWAYS jump] MOS42 0058 E4D6 v7E MOS42 0059 E4D8 ; NEVER fall thru MOS42 0058 E4D6 v7E MOS42 0060 E4D8 REMOV ;remove character from buffer MOS42 0058 E4D6 v7E MOS42 0061 E4D8 B8 CLV ;V=0 => indicate remove option MOS42 0058 E4D6 v7E MOS42 0062 E4D9 ; X = buffer index MOS42 0058 E4D6 v7E MOS42 0063 E4D9 ; V=0 => remove, V=1 => examine MOS42 0058 E4D6 v7E MOS42 0064 E4D9 EXAM1 ;entered with V=1 MOS42 0058 E4D6 v7E MOS42 0065 E4D9 ; MOS42 0058 E4D6 v7E MOS42 0066 E4D9 6C 2C 02 JMI REMVEC ;use indirection (defaults to REM) -- MOS42 0067 E4DC ; -- MOS42 0068 E4DC REM -- MOS42 0069 E4DC [ $Tutu -- MOS42 0072 E4DC | -- MOS42 0073 E4DC ; disable interrupts -- MOS42 0074 E4DC 08 PHP -- MOS42 0075 E4DD 78 SEI -- MOS42 0076 E4DE ] -- MOS42 0077 E4DE ; get buffer start pointer -- MOS42 0078 E4DE BD D8 02 LDAAX BFSTRT -- MOS42 0079 E4E1 DD E1 02 CMPAX BFEND -- MOS42 0080 E4E4 F0 72 BEQ REMOV1 MOS42 0080 E4E4 v0D MOS42 0081 E4E6 A8 TAY ;Y := buffer start pointer MOS42 0080 E4E4 v0D MOS42 0082 E4E7 ; set buffer pointer MOS42 0080 E4E4 v0D MOS42 0083 E4E7 20 C8 E4 JSR SETBUF MOS42 0080 E4E4 v0D MOS42 0084 E4EA ; remove character from buffer MOS42 0080 E4E4 v0D MOS42 0085 E4EA B1 FA LDAIY BUFFLO MOS42 0080 E4E4 v0D MOS42 0086 E4EC 70 1B BVS REMOV3 ;[examine option, exit with character] MOS42 0080 E4E4 v0D MOS42 0087 E4EE 48 PHA ;push character MOS42 0080 E4E4 v0D MOS42 0088 E4EF ; update buffer start pointer MOS42 0080 E4E4 v0D MOS42 0089 E4EF C8 INY MOS42 0080 E4E4 v0D MOS42 0090 E4F0 98 TYA MOS42 0080 E4E4 v0D MOS42 0091 E4F1 D0 03 BNE REMOV2 MOS42 0080 E4E4 v0D MOS42 0092 E4F3 ; wraparound MOS42 0080 E4E4 v0D MOS42 0093 E4F3 BD BF E4 LDAAX BFORG MOS42 0080 E4E4 v0D MOS42 0094 E4F6 REMOV2 MOS42 0080 E4E4 v0D MOS42 0095 E4F6 9D D8 02 STAAX BFSTRT MOS42 0080 E4E4 v0D MOS42 0096 E4F9 ; check for removal of last character in buffer MOS42 0080 E4E4 v0D MOS42 0097 E4F9 ; N.B. this code is only executed for the remove option MOS42 0080 E4E4 v0D MOS42 0098 E4F9 E0 02 CPXIM OUTPUT MOS42 0080 E4E4 v0D MOS42 0099 E4FB 90 0A BCC REMOV4 ;[input buffer, buffer empty event not applicable] MOS42 0080 E4E4 v0D MOS42 0100 E4FD DD E1 02 CMPAX BFEND MOS42 0080 E4E4 v0D MOS42 0101 E500 D0 05 BNE REMOV4 ;[not last character] MOS42 0080 E4E4 v0D MOS42 0102 E502 ; signal buffer empty event MOS42 0080 E4E4 v0D MOS42 0103 E502 A0 00 LDYIM EVMPTY MOS42 0080 E4E4 v0D MOS42 0104 E504 20 0C E5 JSR EVENT MOS42 0080 E4E4 v0D MOS42 0105 E507 REMOV4 MOS42 0080 E4E4 v0D MOS42 0106 E507 68 PLA ;restore character read MOS42 0080 E4E4 v0D MOS42 0107 E508 A8 TAY ;Y := character MOS42 0080 E4E4 v0D MOS42 0108 E509 REMOV3 ;return with C=0 indicating removal successful MOS42 0080 E4E4 v0D MOS42 0109 E509 28 PLP ;restore interrupt state MOS42 0080 E4E4 v0D MOS42 0110 E50A 18 CLC MOS42 0080 E4E4 v0D MOS42 0111 E50B 60 RTS MOS42 0080 E4E4 v0D MOS42 0112 E50C MOS42 0080 E4E4 v0D MOS42 0113 E50C MOS42 0080 E4E4 v0D MOS42 0114 E50C EVENT ;signal event given by Y, optional arguments given in A & X MOS42 0080 E4E4 v0D MOS42 0115 E50C ; this routine must not corrupt A MOS42 0080 E4E4 v0D MOS42 0116 E50C 08 PHP MOS42 0080 E4E4 v0D MOS42 0117 E50D 78 SEI MOS42 0080 E4E4 v0D MOS42 0118 E50E 48 PHA ;save A MOS42 0080 E4E4 v0D MOS42 0119 E50F 85 FA STA EVENTA ;save A MOS42 0080 E4E4 v0D MOS42 0120 E511 B9 BF 02 LDAAY EVENTS MOS42 0080 E4E4 v0D MOS42 0121 E514 F0 41 BEQ EVENT0 ;[event disabled] MOS42 0080 E4E4 v0D MOS42 0122 E516 ; event enabled, call event routine MOS42 0080 E4E4 v0D MOS42 0123 E516 98 TYA ;A = event code MOS42 0080 E4E4 v0D MOS42 0124 E517 A4 FA LDY EVENTA ;Y := argument passed originally in A MOS42 0080 E4E4 v0D MOS42 0125 E519 20 D4 F0 JSR JMIEVT ;A = event code, must not corrupt X MOS42 0080 E4E4 v0D MOS42 0126 E51C 68 PLA ;restore A MOS42 0080 E4E4 v0D MOS42 0127 E51D 28 PLP MOS42 MOS42 MOS42 MOS42 Acorn macro assembler Page 86 MOS42 MOS42 Buffer management MOS42 MOS42 0080 E4E4 v0D MOS42 0128 E51E 18 CLC ;indicate event was enabled MOS42 0080 E4E4 v0D MOS42 0129 E51F 60 RTS MOS42 0080 E4E4 v0D MOS42 0130 E520 MOS42 0080 E4E4 v0D MOS42 0131 E520 CKESCY ;insert character in Y into buffer MOS42 0080 E4E4 v0D MOS42 0132 E520 ; MOS42 0080 E4E4 v0D MOS42 0133 E520 ; signal input event MOS42 0080 E4E4 v0D MOS42 0134 E520 ; MOS42 0080 E4E4 v0D MOS42 0135 E520 98 TYA ;A := character MOS42 0080 E4E4 v0D MOS42 0136 E521 A0 02 LDYIM EVKYBD MOS42 0080 E4E4 v0D MOS42 0137 E523 20 0C E5 JSR EVENT ;assumes A and X not corrupted MOS42 0080 E4E4 v0D MOS42 0138 E526 A8 TAY MOS42 0080 E4E4 v0D MOS42 0139 E527 INSERT ;FX call to insert character into buffer MOS42 0080 E4E4 v0D MOS42 0140 E527 98 TYA MOS42 0080 E4E4 v0D MOS42 0141 E528 INSRT ;insert character into buffer MOS42 0080 E4E4 v0D MOS42 0142 E528 ; MOS42 0080 E4E4 v0D MOS42 0143 E528 6C 2A 02 JMI INSVEC ;use indirection (defaults to INS) MOS42 0080 E4E4 v0D MOS42 0144 E52B ; MOS42 0080 E4E4 v0D MOS42 0145 E52B INS MOS42 0080 E4E4 v0D MOS42 0146 E52B ; A = character MOS42 0080 E4E4 v0D MOS42 0147 E52B ; X = buffer index MOS42 0080 E4E4 v0D MOS42 0148 E52B [ $Tutu MOS42 0080 E4E4 v0D MOS42 0151 E52B | MOS42 0080 E4E4 v0D MOS42 0152 E52B ; disable interrupts MOS42 0080 E4E4 v0D MOS42 0153 E52B 08 PHP MOS42 0080 E4E4 v0D MOS42 0154 E52C 78 SEI MOS42 0080 E4E4 v0D MOS42 0155 E52D ] MOS42 0080 E4E4 v0D MOS42 0156 E52D ; save character MOS42 0080 E4E4 v0D MOS42 0157 E52D 48 PHA MOS42 0080 E4E4 v0D MOS42 0158 E52E ; construct buffer end offset in Y MOS42 0080 E4E4 v0D MOS42 0159 E52E BC E1 02 LDYAX BFEND MOS42 0080 E4E4 v0D MOS42 0160 E531 C8 INY MOS42 0080 E4E4 v0D MOS42 0161 E532 D0 03 BNE INSRT2 MOS42 0080 E4E4 v0D MOS42 0162 E534 ; buffer wraparound MOS42 0080 E4E4 v0D MOS42 0163 E534 BC BF E4 LDYAX BFORG MOS42 0080 E4E4 v0D MOS42 0164 E537 INSRT2 MOS42 0080 E4E4 v0D MOS42 0165 E537 98 TYA MOS42 0080 E4E4 v0D MOS42 0166 E538 DD D8 02 CMPAX BFSTRT MOS42 0080 E4E4 v0D MOS42 0167 E53B F0 0F BEQ INSRT1 ;[buffer full] MOS42 0080 E4E4 v0D MOS42 0168 E53D ; update buffer end pointer MOS42 0080 E4E4 v0D MOS42 0169 E53D BC E1 02 LDYAX BFEND MOS42 0080 E4E4 v0D MOS42 0170 E540 9D E1 02 STAAX BFEND MOS42 0080 E4E4 v0D MOS42 0171 E543 ; construct buffer pointer MOS42 0080 E4E4 v0D MOS42 0172 E543 20 C8 E4 JSR SETBUF MOS42 0080 E4E4 v0D MOS42 0173 E546 ; store character in buffer MOS42 0080 E4E4 v0D MOS42 0174 E546 68 PLA ;A := character MOS42 0080 E4E4 v0D MOS42 0175 E547 91 FA STAIY BUFFLO MOS42 0080 E4E4 v0D MOS42 0176 E549 ; return with C=0 => insert successful MOS42 0080 E4E4 v0D MOS42 0177 E549 28 PLP ;restore interrupt state MOS42 0080 E4E4 v0D MOS42 0178 E54A 18 CLC MOS42 0080 E4E4 v0D MOS42 0179 E54B 60 RTS MOS42 0080 E4E4 v0D MOS42 0180 E54C MOS42 0080 E4E4 v0D MOS42 0181 E54C INSRT1 ;signal buffer full event MOS42 0080 E4E4 v0D MOS42 0182 E54C 68 PLA ;restore character MOS42 0080 E4E4 v0D MOS42 0183 E54D E0 02 CPXIM OUTPUT MOS42 0080 E4E4 v0D MOS42 0184 E54F B0 07 BCS INOBUF ;[output buffer, buffer full event not applicable] MOS42 0080 E4E4 v0D MOS42 0185 E551 ; signal input buffer full event MOS42 0080 E4E4 v0D MOS42 0186 E551 A0 01 LDYIM EVFULL MOS42 0080 E4E4 v0D MOS42 0187 E553 20 0C E5 JSR EVENT ;A=character, X=bufferid MOS42 0080 E4E4 v0D MOS42 0188 E556 ; (N.B. does not corrupt A, should not corrupt X) MOS42 0080 E4E4 v0D MOS42 0189 E556 48 PHA ;compensate for following PLA MOS42 0080 E4E4 v0D MOS42 0190 E557 EVENT0 ;indicate event was disabled MOS42 0080 E4E4 v0D MOS42 0191 E557 68 PLA MOS42 0080 E4E4 v0D MOS42 0192 E558 INOBUF ;output buffer, buffer full event not applicable MOS42 0080 E4E4 v0D MOS42 0193 E558 REMOV1 ;return with C=1 => insert/remove failed due to buffer full/empty MOS42 0080 E4E4 v0D MOS42 0194 E558 28 PLP ;restore interrupt state MOS42 0245 E577 ^27 MOS42 0195 E559 38 SEC MOS42 0245 E577 ^27 MOS42 0196 E55A 60 RTS MOS42 0245 E577 ^27 MOS42 0197 E55B MOS42 0245 E577 ^27 MOS42 0198 E55B MOS42 0245 E577 ^27 MOS42 0199 E55B CAPS ;test for an uppercase letter MOS42 0245 E577 ^27 MOS42 0200 E55B MOS42 0245 E577 ^27 MOS42 0201 E55B [ MOS125 = &FF MOS42 0245 E577 ^27 MOS42 0214 E55B | MOS42 0245 E577 ^27 MOS42 0215 E55B 48 PHA MOS42 0245 E577 ^27 MOS42 0216 E55C ;Must preserve V during LOADGO->SRCH0->LOOK->CMPFT->CAPS MOS42 0245 E577 ^27 MOS42 0217 E55C ;ANDIM &DF;CMPIM "A";EORIM &FF;RORA;ADCIM "Z":SHR:1 MOS42 0245 E577 ^27 MOS42 0218 E55C ;ORAIM &20;CMPIM "z"+&01;EORIM &FF;RORA;ADCIM ("a":SHR:1):OR:&80 MOS42 0245 E577 ^27 MOS42 0219 E55C 29 DF ANDIM &DF MOS42 0245 E577 ^27 MOS42 0220 E55E C9 5B CMPIM "Z"+&01 MOS42 0245 E577 ^27 MOS42 0221 E560 B0 04 BCS CAPSX MOS42 0245 E577 ^27 MOS42 0222 E562 49 FF EORIM &FF MOS42 0245 E577 ^27 MOS42 0223 E564 C9 BF CMPIM "A"-&01:EOR:&FF MOS42 0245 E577 ^27 MOS42 0224 E566 CAPSX MOS42 0245 E577 ^27 MOS42 0225 E566 68 PLA MOS42 0245 E577 ^27 MOS42 0226 E567 ; C=0 => Pass, C=1 => Fail MOS42 0245 E577 ^27 MOS42 0227 E567 60 RTS MOS42 0245 E577 ^27 MOS42 0228 E568 ] MOS42 0245 E577 ^27 MOS42 0229 E568 MOS42 0245 E577 ^27 MOS42 0230 E568 MOS42 0245 E577 ^27 MOS42 0231 E568 RDCHS ;insert character into RDCH (keyboard) buffer MOS42 0245 E577 ^27 MOS42 0232 E568 A2 00 LDXIM BRDCH MOS42 0245 E577 ^27 MOS42 0233 E56A RNSRT MOS42 0245 E577 ^27 MOS42 0234 E56A ; insert character Y into buffer whose index is X, MOS42 0245 E577 ^27 MOS42 0235 E56A ; checking for the interrupt character (default ASCII escape) MOS42 0245 E577 ^27 MOS42 0236 E56A ; MOS42 0245 E577 ^27 MOS42 0237 E56A ; RS423 8 bit does not detect interrupt character MOS42 0245 E577 ^27 MOS42 0238 E56A 8A TXA MOS42 0245 E577 ^27 MOS42 0239 E56B 2D 45 02 AND RS8BIT MOS42 0245 E577 ^27 MOS42 0240 E56E D0 B7 BNE INSERT ;[RSI & RS423-8-bit, no input event] MOS42 0245 E577 ^27 MOS42 0241 E570 ; MOS42 0245 E577 ^27 MOS42 0242 E570 98 TYA MOS42 0245 E577 ^27 MOS42 0243 E571 4D 6C 02 EOR INTCH ;default INTCH is ESC MOS42 0245 E577 ^27 MOS42 0244 E574 0D 75 02 ORA ESCHAR ;treat as character? MOS42 0245 E577 ^27 MOS42 0245 E577 D0 A7 BNE CKESCY ;[not escape character or let escape thru, take no action] -- MOS42 0246 E579 ; -- MOS42 0247 E579 ; ESC detected - ignore ? -- MOS42 0248 E579 AD 58 02 LDA CRIT -- MOS42 0249 E57C 6A RORA -- MOS42 0250 E57D 98 TYA ;A := character -- MOS42 0251 E57E B0 0A BCS CLCRTS ;[ignore escape] MOS42 0251 E57E v75 MOS42 0252 E580 ; MOS42 0251 E57E v75 MOS42 0253 E580 A0 06 LDYIM EVESC MOS42 0251 E57E v75 MOS42 0254 E582 20 0C E5 JSR EVENT ;N.B. does not corrupt A MOS42 0251 E57E v75 MOS42 0255 E585 90 03 BCC CKESC1 ;[event was enabled, no need to take default action] MOS42 0251 E57E v75 MOS42 0256 E587 ; MOS42 0251 E57E v75 MOS42 0257 E587 ; event was disabled, so take default action MOS42 0251 E57E v75 MOS42 0258 E587 ; default escape routine MOS42 0251 E57E v75 MOS42 0259 E587 ; C=1 MOS42 0251 E57E v75 MOS42 0260 E587 20 E9 E6 JSR CESCPS ;set escape flag **** MUST USE ROUTINE CESCPS **** MOS42 0251 E57E v75 MOS42 0261 E58A CKESC1 ;character 'inserted' successfully MOS42 0251 E57E v75 MOS42 0262 E58A CLCRTS MOS42 MOS42 MOS42 MOS42 Acorn macro assembler Page 87 MOS42 MOS42 Buffer management MOS42 MOS42 0251 E57E v75 MOS42 0263 E58A 18 CLC -- MOS42 0264 E58B ; C=0 => character inserted OK, C=1 => character not inserted -- MOS42 0265 E58B 60 RTS ;RETURN - do not insert ESC into buffer -- MOS42 0266 E58C -- MOS42 0267 E58C RDCHGX ;check for cursor option 1 -- MOS42 0268 E58C 6A RORA MOS42 0390 E5D7 ^33 MOS42 0269 E58D 68 PLA MOS42 0390 E5D7 ^33 MOS42 0270 E58E B0 79 BCS RDCHGCLC ;[option 1 active, return &87..&8B] MOS42 0270 E58E v06 MOS42 0271 E590 ; treat as cursor option 2 MOS42 0270 E58E v06 MOS42 0272 E590 RDCHGS ;process character as real softkey MOS42 0270 E58E v06 MOS42 0273 E590 98 TYA ;A := character MOS42 0270 E58E v06 MOS42 0274 E591 ; MOS42 0270 E58E v06 MOS42 0275 E591 [ MOS125 = &FF MOS42 0270 E58E v06 MOS42 0296 E591 | MOS42 0270 E58E v06 MOS42 0297 E591 29 0F ANDIM &0F MOS42 0270 E58E v06 MOS42 0298 E593 48 PHA MOS42 0270 E58E v06 MOS42 0299 E594 98 TYA MOS42 0270 E58E v06 MOS42 0300 E595 4A LSRA MOS42 0270 E58E v06 MOS42 0301 E596 4A LSRA MOS42 0270 E58E v06 MOS42 0302 E597 4A LSRA MOS42 0270 E58E v06 MOS42 0303 E598 4A LSRA MOS42 0270 E58E v06 MOS42 0304 E599 ; MOS42 0270 E58E v06 MOS42 0305 E599 49 04 EORIM &04 ;fudge to tie in with frozen documentation MOS42 0270 E58E v06 MOS42 0306 E59B A8 TAY MOS42 0270 E58E v06 MOS42 0307 E59C ; character on stack MOS42 0270 E58E v06 MOS42 0308 E59C ; MOS42 0270 E58E v06 MOS42 0309 E59C A9 01 LDAIM &01 MOS42 0270 E58E v06 MOS42 0310 E59E D9 65 02 CMPAY SOFTLO-&08 MOS42 0270 E58E v06 MOS42 0311 E5A1 F0 68 BEQ GKEY ;[expand softkey] MOS42 0270 E58E v06 MOS42 0312 E5A3 68 PLA ;restore character MOS42 0270 E58E v06 MOS42 0313 E5A4 B0 0A BCS RDCHG1 ;[ignore key] MOS42 0270 E58E v06 MOS42 0314 E5A6 ; return byte code MOS42 0270 E58E v06 MOS42 0315 E5A6 ; C=0 MOS42 0270 E58E v06 MOS42 0316 E5A6 79 65 02 ADCAY SOFTLO-&08 MOS42 0270 E58E v06 MOS42 0317 E5A9 ] MOS42 0270 E58E v06 MOS42 0318 E5A9 MOS42 0270 E58E v06 MOS42 0319 E5A9 18 CLC MOS42 0270 E58E v06 MOS42 0320 E5AA 60 RTS ;read successful, character in A MOS42 0270 E58E v06 MOS42 0321 E5AB MOS42 0270 E58E v06 MOS42 0322 E5AB MOS42 0270 E58E v06 MOS42 0323 E5AB RDCHGB MOS42 0270 E58E v06 MOS42 0324 E5AB ; invalid character at cursor position MOS42 0270 E58E v06 MOS42 0325 E5AB ; complain by transmitting BEL MOS42 0270 E58E v06 MOS42 0326 E5AB 20 9B E8 JSR BELL ;**** N.B. NOT THRU OSWRCH **** must restore X MOS42 0270 E58E v06 MOS42 0327 E5AE 68 PLA MOS42 0270 E58E v06 MOS42 0328 E5AF AA TAX ;restore X MOS42 0270 E58E v06 MOS42 0329 E5B0 ; get next character MOS42 0270 E58E v06 MOS42 0330 E5B0 ; MOS42 0270 E58E v06 MOS42 0331 E5B0 RDCHG1 ;process character from currently selected input buffer MOS42 0270 E58E v06 MOS42 0332 E5B0 20 D8 E4 JSR REMOV ;get character from buffer MOS42 0270 E58E v06 MOS42 0333 E5B3 B0 55 BCS RDCHG0 ;[buffer empty, C=1] MOS42 0270 E58E v06 MOS42 0334 E5B5 ; MOS42 0270 E58E v06 MOS42 0335 E5B5 ; C=0 MOS42 0270 E58E v06 MOS42 0336 E5B5 ; MOS42 0270 E58E v06 MOS42 0337 E5B5 ; character is in A MOS42 0270 E58E v06 MOS42 0338 E5B5 ; MOS42 0270 E58E v06 MOS42 0339 E5B5 ; check whether to set RTS hi for RS423 input MOS42 0270 E58E v06 MOS42 0340 E5B5 ; save A MOS42 0270 E58E v06 MOS42 0341 E5B5 48 PHA MOS42 0270 E58E v06 MOS42 0342 E5B6 ; MOS42 0270 E58E v06 MOS42 0343 E5B6 ; check for RS423 input buffer MOS42 0270 E58E v06 MOS42 0344 E5B6 E0 01 CPXIM BRSI MOS42 0270 E58E v06 MOS42 0345 E5B8 D0 06 BNE RDCHL ;[keyboard buffer, C=0] MOS42 0270 E58E v06 MOS42 0346 E5BA ; MOS42 0270 E58E v06 MOS42 0347 E5BA 20 0F E2 JSR RSETX ;set RHITXE if applicable MOS42 0270 E58E v06 MOS42 0348 E5BD ; MOS42 0270 E58E v06 MOS42 0349 E5BD A2 01 LDXIM BRSI ;restore bufferid MOS42 0270 E58E v06 MOS42 0350 E5BF 38 SEC MOS42 0270 E58E v06 MOS42 0351 E5C0 ; MOS42 0270 E58E v06 MOS42 0352 E5C0 RDCHL ;do not alter RTS MOS42 0270 E58E v06 MOS42 0353 E5C0 ; C=0 => keyboard, C=1 => RS423 MOS42 0270 E58E v06 MOS42 0354 E5C0 ; MOS42 0270 E58E v06 MOS42 0355 E5C0 ; restore A MOS42 0270 E58E v06 MOS42 0356 E5C0 68 PLA MOS42 0270 E58E v06 MOS42 0357 E5C1 ; MOS42 0270 E58E v06 MOS42 0358 E5C1 90 05 BCC RDCHK ;[keyboard] MOS42 0270 E58E v06 MOS42 0359 E5C3 ; MOS42 0270 E58E v06 MOS42 0360 E5C3 ; RS423 MOS42 0270 E58E v06 MOS42 0361 E5C3 ; MOS42 0270 E58E v06 MOS42 0362 E5C3 AC 45 02 LDY RS8BIT MOS42 0270 E58E v06 MOS42 0363 E5C6 D0 41 BNE RDCHGCLC ;[let RS423 deliver 8 bit codes] MOS42 0270 E58E v06 MOS42 0364 E5C8 RDCHK MOS42 0270 E58E v06 MOS42 0365 E5C8 ; MOS42 0270 E58E v06 MOS42 0366 E5C8 ; test to see if it is a softkey (real or pseudo) MOS42 0270 E58E v06 MOS42 0367 E5C8 A8 TAY ;Y := character MOS42 0270 E58E v06 MOS42 0368 E5C9 10 3E BPL RDCHGCLC ;[not a soft key (top bit zero), C=0] MOS42 0270 E58E v06 MOS42 0369 E5CB MOS42 0270 E58E v06 MOS42 0370 E5CB [ FALSE=0 MOS42 0270 E58E v06 MOS42 0373 E5CB ] MOS42 0270 E58E v06 MOS42 0374 E5CB MOS42 0270 E58E v06 MOS42 0375 E5CB ; character is a softkey MOS42 0270 E58E v06 MOS42 0376 E5CB ; check for cursor control key MOS42 0270 E58E v06 MOS42 0377 E5CB 29 0F ANDIM &0F MOS42 0270 E58E v06 MOS42 0378 E5CD C9 0B CMPIM MCOPY-SOFTK0 MOS42 0270 E58E v06 MOS42 0379 E5CF 90 BF BCC RDCHGS ;[not a cursor control, therefore a real softkey] MOS42 0270 E58E v06 MOS42 0380 E5D1 ; cursor control key MOS42 0270 E58E v06 MOS42 0381 E5D1 ; C=1 MOS42 0270 E58E v06 MOS42 0382 E5D1 ; convert character to codes &87..&8B MOS42 0270 E58E v06 MOS42 0383 E5D1 69 7B ADCIM &87-MCOPY+SOFTK0-&1 MOS42 0270 E58E v06 MOS42 0384 E5D3 48 PHA ;save converted code, real character still in Y MOS42 0270 E58E v06 MOS42 0385 E5D4 ; there are 3 cursor options (selected by *FX4) MOS42 0270 E58E v06 MOS42 0386 E5D4 ; 0 cursor edit VDU MOS42 0270 E58E v06 MOS42 0387 E5D4 ; 1 return codes &87..&8B MOS42 0270 E58E v06 MOS42 0388 E5D4 ; 2 treat as softkey MOS42 0270 E58E v06 MOS42 0389 E5D4 AD 7D 02 LDA CURSED MOS42 0270 E58E v06 MOS42 0390 E5D7 D0 B3 BNE RDCHGX ;[not option 0] MOS42 0270 E58E v06 MOS42 0391 E5D9 ; option 0 MOS42 0270 E58E v06 MOS42 0392 E5D9 ; check if output to VDU MOS42 0270 E58E v06 MOS42 0393 E5D9 AD 7C 02 LDA WRCHSW MOS42 0270 E58E v06 MOS42 0394 E5DC 6A RORA MOS42 0270 E58E v06 MOS42 0395 E5DD 6A RORA MOS42 0270 E58E v06 MOS42 0396 E5DE 68 PLA ;restore converted code MOS42 0270 E58E v06 MOS42 0397 E5DF B0 CF BCS RDCHG1 ;[ignore character, output not to VDU] MOS42 0270 E58E v06 MOS42 0398 E5E1 ; let VDU process code MOS42 0270 E58E v06 MOS42 0399 E5E1 C9 87 CMPIM &87 MOS42 0270 E58E v06 MOS42 0400 E5E3 F0 36 BEQ RDCHGY ;[COPY key] MOS42 0270 E58E v06 MOS42 0401 E5E5 ; cursor direction key MOS42 0270 E58E v06 MOS42 0402 E5E5 A8 TAY ;save X MOS42 0270 E58E v06 MOS42 0403 E5E6 8A TXA MOS42 0270 E58E v06 MOS42 0404 E5E7 48 PHA MOS42 0270 E58E v06 MOS42 0405 E5E8 98 TYA MOS42 MOS42 MOS42 MOS42 Acorn macro assembler Page 88 MOS42 MOS42 Buffer management MOS42 MOS42 0270 E58E v06 MOS42 0406 E5E9 20 5E D8 JSR VDUB ;N.B. cursor control entry point MOS42 0270 E58E v06 MOS42 0407 E5EC 68 PLA MOS42 0270 E58E v06 MOS42 0408 E5ED AA TAX ;restore X MOS42 0270 E58E v06 MOS42 0409 E5EE ; falling thru will transfer control to RDCHG1 MOS42 0270 E58E v06 MOS42 0410 E5EE RDCHG MOS42 0270 E58E v06 MOS42 0411 E5EE ; FETCH CHAR FROM RDCH BUFFER MOS42 0270 E58E v06 MOS42 0412 E5EE ; EXPAND SOFT KEYS AS NECESSARY MOS42 0270 E58E v06 MOS42 0413 E5EE ; PASS CURSOR CONTROL KEYS MOS42 0270 E58E v06 MOS42 0414 E5EE ; STRAIGHT TO VDU DRIVER MOS42 0270 E58E v06 MOS42 0415 E5EE ; RETURN CARRY SET IF CHARACTER MOS42 0270 E58E v06 MOS42 0416 E5EE ; AVAILABLE MOS42 0270 E58E v06 MOS42 0417 E5EE ; MOS42 0270 E58E v06 MOS42 0418 E5EE ; check for ECONET interception MOS42 0270 E58E v06 MOS42 0419 E5EE ; MOS42 0270 E58E v06 MOS42 0420 E5EE 2C 5F 02 BIT NETRDC MOS42 0270 E58E v06 MOS42 0421 E5F1 10 05 BPL RDCHNM ;[normal RDCH] MOS42 0270 E58E v06 MOS42 0422 E5F3 ; MOS42 0270 E58E v06 MOS42 0423 E5F3 ; let network supply character MOS42 0270 E58E v06 MOS42 0424 E5F3 ; MOS42 0270 E58E v06 MOS42 0425 E5F3 A9 06 LDAIM NTRDCH MOS42 0270 E58E v06 MOS42 0426 E5F5 6C 24 02 JMINET JMI NETVEC ;network operation call, results returned in A and C MOS42 0270 E58E v06 MOS42 0427 E5F8 MOS42 0270 E58E v06 MOS42 0428 E5F8 MOS42 0270 E58E v06 MOS42 0429 E5F8 RDCHNM ;not reading from network MOS42 0270 E58E v06 MOS42 0430 E5F8 AD 68 02 LDA SOFKL MOS42 0270 E58E v06 MOS42 0431 E5FB F0 B3 BEQ RDCHG1 ;[no pending soft key expansion] MOS42 0270 E58E v06 MOS42 0432 E5FD AC C9 02 LDY SOFKP MOS42 0270 E58E v06 MOS42 0433 E600 B9 01 0B LDAAY SKBUF ;GET EXPANSION CHAR MOS42 0270 E58E v06 MOS42 0434 E603 EE C9 02 INC SOFKP ;increment pointer into soft key buffer MOS42 0270 E58E v06 MOS42 0435 E606 CE 68 02 DEC SOFKL ;decrement remaining count of soft key characters MOS42 0270 E58E v06 MOS42 0436 E609 RDCHGCLC MOS42 0270 E58E v06 MOS42 0437 E609 18 CLC ;C=0 => character read successfully MOS42 0459 E621 ^08 MOS42 0438 E60A RDCHG0 MOS42 0459 E621 ^08 MOS42 0439 E60A 60 RTS MOS42 0459 E621 ^08 MOS42 0440 E60B MOS42 0459 E621 ^08 MOS42 0441 E60B GKEY ;soft key detected AND soft keys enabled MOS42 0459 E621 ^08 MOS42 0442 E60B 68 PLA ;restore softkey code MOS42 0459 E621 ^08 MOS42 0443 E60C [ MOS125 = &FF MOS42 0459 E621 ^08 MOS42 0445 E60C ] MOS42 0459 E621 ^08 MOS42 0446 E60C A8 TAY ;Y := soft key number MOS42 0459 E621 ^08 MOS42 0447 E60D 20 20 E4 JSR SKSIZE ;A := length of soft key string given by Y MOS42 0459 E621 ^08 MOS42 0448 E610 8D 68 02 STA SOFKL ;SOFKL := length of soft key string MOS42 0459 E621 ^08 MOS42 0449 E613 ; N.B. X = soft key number MOS42 0459 E621 ^08 MOS42 0450 E613 B9 00 0B LDAAY SKPTR MOS42 0459 E621 ^08 MOS42 0451 E616 8D C9 02 STA SOFKP ;SOFKP points to key string (N.B. pointer always <> 0) MOS42 0459 E621 ^08 MOS42 0452 E619 D0 D3 BNE RDCHG ;[ALWAYS JUMP] MOS42 0459 E621 ^08 MOS42 0453 E61B MOS42 0459 E621 ^08 MOS42 0454 E61B RDCHGY ;copy character at text cursor position MOS42 0459 E621 ^08 MOS42 0455 E61B 8A TXA MOS42 0459 E621 ^08 MOS42 0456 E61C 48 PHA ;save X MOS42 0459 E621 ^08 MOS42 0457 E61D 20 95 D8 JSR COPYCH ;N.B. VDU sets Z bit, but this is not used MOS42 0459 E621 ^08 MOS42 0458 E620 A8 TAY ;save character MOS42 0459 E621 ^08 MOS42 0459 E621 F0 88 BEQ RDCHGB ;[invalid character at text cursor] -- MOS42 0460 E623 ; valid character at cursor position -- MOS42 0461 E623 68 PLA -- MOS42 0462 E624 AA TAX ;restore X -- MOS42 0463 E625 98 TYA ;restore character -- MOS42 0464 E626 ; C=0, character in A -- MOS42 0465 E626 18 CLC -- MOS42 0466 E627 60 RTS -- MOS42 0467 E628 -- MOS42 0468 E628 -- MOS42 0469 E628 LNK MOS44 -- MOS44 0001 E628 ; > MOS44 -- MOS44 0002 E628 TTL MOS44 OSBYTE routines -- MOS44 0003 E628 OPT MOS44 MOS44 MOS44 MOS44 MOS44 Acorn macro assembler Page 89 MOS44 MOS44 OSBYTE routines MOS44 -- MOS44 0004 E628 ;(c) 1981 ACORN Computers Limited -- MOS44 0005 E628 ;BBC Microcomputer Machine Operating System (MOS) -- MOS44 0006 E628 ;Change record: -- MOS44 0007 E628 ;01-Mar-82 PB PEEK and POKE introduced -- MOS44 0008 E628 ;Author(s): -- MOS44 0009 E628 ;PB Paul Bond -- MOS44 0010 E628 -- MOS44 0011 E628 -- MOS44 0012 E628 BYTET ;table for OSBYTE. N.B. lo-byte followed by hi-byte -- MOS44 0013 E628 ; -- MOS44 0014 E628 ; 0 indicate version number -- MOS44 0015 E628 ; X=0 => BRK message -- MOS44 0016 E628 ; X<>0 => return version number in X -- MOS44 0017 E628 7D EA & VER -- MOS44 0018 E62A -- MOS44 0019 E62A ; -- MOS44 0020 E62A ; 1 set value -- MOS44 0021 E62A B1 E9 & V2B156 -- MOS44 0022 E62C -- MOS44 0023 E62C ; -- MOS44 0024 E62C ; 2 select input stream -- MOS44 0025 E62C ; X=0 => select keyboard, disable RS423 -- MOS44 0026 E62C ; X=1 => select RS423, enable RS423 -- MOS44 0027 E62C ; X=2 => select keyboard, enable RS423 -- MOS44 0028 E62C 47 E7 & SELIN -- MOS44 0029 E62E -- MOS44 0030 E62E ; -- MOS44 0031 E62E ; 3 select output stream(s) -- MOS44 0032 E62E ; X=rrrrspvl -- MOS44 0033 E62E ; r (reserved) -- MOS44 0034 E62E ; s=0 => spooling enabled -- MOS44 0035 E62E ; p=0 => printing enabled -- MOS44 0036 E62E ; v=0 => output to VDU enabled -- MOS44 0037 E62E ; l=1 => output to RS423 enabled -- MOS44 0038 E62E C0 E9 & V2B34 -- MOS44 0039 E630 -- MOS44 0040 E630 ; -- MOS44 0041 E630 ; 4 enable/disable cursor edit -- MOS44 0042 E630 ; X=0 => cursor editing enabled -- MOS44 0043 E630 ; X=1 => COPY/LEFT/RIGHT/DOWN/UP return $87/$88/$89/$8A/$8B -- MOS44 0044 E630 ; X=2 => COPY/LEFT/RIGHT/DOWN/UP at as soft keys 11 thru 15 -- MOS44 0045 E630 C0 E9 & V2B34 -- MOS44 0046 E632 -- MOS44 0047 E632 ; -- MOS44 0048 E632 ; 5 select print destination -- MOS44 0049 E632 ; X=0 => infinite sink -- MOS44 0050 E632 ; X=1 => centronics -- MOS44 0051 E632 ; X=2 => RS423 -- MOS44 0052 E632 9F E9 & SPRINT -- MOS44 0053 E634 -- MOS44 0054 E634 ; -- MOS44 0055 E634 ; 6 set printer ignore character -- MOS44 0056 E634 ; X=0 => ignore no characters -- MOS44 0057 E634 ; X<>0 => ignore character -- MOS44 0058 E634 B1 E9 & V2B156 -- MOS44 0059 E636 -- MOS44 0060 E636 ; -- MOS44 0061 E636 ; 7 set RS423 receive baud rate -- MOS44 0062 E636 ; X=0 => set default (9600) -- MOS44 0063 E636 ; X=1/2/3/4/5/6/7/8 => 75/150/300/1200/2400/4800/9600/19200 -- MOS44 0064 E636 FF E6 & RXBAUD -- MOS44 0065 E638 -- MOS44 0066 E638 ; -- MOS44 0067 E638 ; 8 set RS423 trasmit baud rate -- MOS44 0068 E638 ; [values as for OSBYTE(7)] -- MOS44 0069 E638 FD E6 & TXBAUD -- MOS44 0070 E63A -- MOS44 0071 E63A ; -- MOS44 0072 E63A ; 9 set flash mark period -- MOS44 0073 E63A ; X=0 => infinite -- MOS44 0074 E63A ; X<>0 => * 20 milliseconds -- MOS44 0075 E63A 24 E7 & FMRK -- MOS44 0076 E63C -- MOS44 0077 E63C ; -- MOS44 0078 E63C ; 10 set flash space period -- MOS44 0079 E63C ; 9 set flash mark period -- MOS44 0080 E63C ; X=0 => infinite -- MOS44 0081 E63C ; X<>0 => * 20 milliseconds -- MOS44 0082 E63C 26 E7 & FSPC -- MOS44 0083 E63E -- MOS44 0084 E63E ; -- MOS44 0085 E63E ; 11 set auto-repeat delay period -- MOS44 0086 E63E ; X=0 => suppress auto-repeat -- MOS44 0087 E63E ; X<>0 => set delay between first and second character to centiseconds -- MOS44 0088 E63E BE E9 & ARDLY -- MOS44 0089 E640 -- MOS44 0090 E640 ; -- MOS44 0091 E640 ; 12 set auto-repeat repeat period -- MOS44 0092 E640 ; X=0 => set delay and period to values on power-up -- MOS44 0093 E640 ; X<>0 => set period between subsequent characters to centiseconds -- MOS44 0094 E640 B5 E9 & ARRPT -- MOS44 0095 E642 -- MOS44 0096 E642 ; -- MOS44 0097 E642 ; 13 disable event -- MOS44 0098 E642 ; X=event_code -- MOS44 0099 E642 ; 0: output buffer empty -- MOS44 0100 E642 ; 1: input buffer full -- MOS44 0101 E642 ; 2: character entering input buffer -- MOS44 0102 E642 ; 3: ADC conversion complete -- MOS44 0103 E642 ; 4: vertical SYNC -- MOS44 0104 E642 ; 5: interval timer crossing zero -- MOS44 0105 E642 ; 6: ESCAPE detected -- MOS44 0106 E642 ; 7: RS423 error -- MOS44 0107 E642 6D E7 & MDSABL -- MOS44 0108 E644 -- MOS44 0109 E644 ; -- MOS44 0110 E644 ; 14 enable event -- MOS44 0111 E644 ; [values as for OSBYTE(13)] -- MOS44 0112 E644 6E E7 & ENABLE -- MOS44 0113 E646 -- MOS44 0114 E646 ; -- MOS44 0115 E646 ; 15 flush buffer class -- MOS44 0116 E646 ; X=0 => flush all buffers -- MOS44 0117 E646 ; X=1 => flush currently selected input buffer -- MOS44 0118 E646 9E E1 & FLUSHC -- MOS44 0119 E648 -- MOS44 0120 E648 ; -- MOS44 0121 E648 ; 16 select number of ADC channels -- MOS44 0122 E648 ; X=0 => stop scanning ADC channels -- MOS44 0123 E648 ; X=1/2/3/4 => only scan channels 1 thru -- MOS44 0124 E648 7A E7 & SETADC MOS44 MOS44 MOS44 MOS44 Acorn macro assembler Page 90 MOS44 MOS44 OSBYTE routines MOS44 -- MOS44 0125 E64A -- MOS44 0126 E64A ; -- MOS44 0127 E64A ; 17 start ADC conversion on channel X -- MOS44 0128 E64A ; X=1/2/3/4 => start conversion on channel -- MOS44 0129 E64A 3F DE & ADCBEG -- MOS44 0130 E64C -- MOS44 0131 E64C ; -- MOS44 0132 E64C ; 18 reset soft keys -- MOS44 0133 E64C F1 E9 & RSOFT -- MOS44 0134 E64E -- MOS44 0135 E64E ; -- MOS44 0136 E64E ; 19 wait for vertical sync -- MOS44 0137 E64E DF E9 & WFVS -- MOS44 0138 E650 -- MOS44 0139 E650 ; -- MOS44 0140 E650 ; 20 implode/explode soft font -- MOS44 0141 E650 FD CC & FONT -- MOS44 0142 E652 -- MOS44 0143 E652 ; -- MOS44 0144 E652 ; 21 flush specific buffer -- MOS44 0145 E652 AA E1 & FLUSHS -- MOS44 0146 E654 -- MOS44 0147 E654 ; -- MOS44 0148 E654 0016 BYTEL * .-BYTET:SHR: 1 ;next entry in BYTETL table (lo component) -- MOS44 0149 E654 ; -- MOS44 0150 E654 BYTET2 -- MOS44 0151 E654 0075 BYTEM * &0075 -- MOS44 0152 E654 ; -- MOS44 0153 E654 ; -- MOS44 0154 E654 98 E8 & VDUST ;read VDU status; $75 -- MOS44 0155 E656 -- MOS44 0156 E656 ; -- MOS44 0157 E656 02 EA & MOSTST ;reflect state of KSTAT; $76 -- MOS44 0158 E658 -- MOS44 0159 E658 ; -- MOS44 0160 E658 05 E3 & SHUTES ;close EXEC and SPOOL files; $77 -- MOS44 0161 E65A -- MOS44 0162 E65A ; -- MOS44 0163 E65A 57 F2 & OLDKEY ;set keyboard old key; $78 -- MOS44 0164 E65C -- MOS44 0165 E65C ; -- MOS44 0166 E65C DA F0 & XSCANB ;scan keyboard at specific address; $79 -- MOS44 0167 E65E -- MOS44 0168 E65E ; -- MOS44 0169 E65E D8 F0 & XSCANA ;scan keyboard from matrix entry $10; $7A -- MOS44 0170 E660 -- MOS44 0171 E660 ; -- MOS44 0172 E660 33 E2 & PFREE ;indicate printer dormant; $7B -- MOS44 0173 E662 -- MOS44 0174 E662 ; -- MOS44 0175 E662 E8 E6 & CESCPC ;clear escape flag; $7C -- MOS44 0176 E664 -- MOS44 0177 E664 ; -- MOS44 0178 E664 E9 E6 & CESCPS ;set escape flag; $7D -- MOS44 0179 E666 -- MOS44 0180 E666 ; -- MOS44 0181 E666 D1 E6 & CESCP ;clear escape flag and purge selected input buffer; $7E -- MOS44 0182 E668 -- MOS44 0183 E668 ; -- MOS44 0184 E668 C5 F0 & EOF ;end of file; $7F -- MOS44 0185 E66A -- MOS44 0186 E66A ; -- MOS44 0187 E66A ; $80 -- MOS44 0188 E66A ;; read data on ADC channel -- MOS44 0189 E66A ; in: Y>=0 => X=0 => read control information -- MOS44 0190 E66A ; X<>0 => read last conversion on channel X -- MOS44 0191 E66A ; Y<0 => read info for buffer NOT(X) -- MOS44 0192 E66A ; out: Y>=0 => X=0 => X=fire-buttons, Y=last-channel-to-convert -- MOS44 0193 E66A ; X<>0 => X=lo-data, Y=hi-data -- MOS44 0194 E66A ; Y<0 => X=buffer-count (input: bytes ready, output: bytes left) -- MOS44 0195 E66A B5 E7 & RADCX -- MOS44 0196 E66C -- MOS44 0197 E66C ; -- MOS44 0198 E66C ; $81 -- MOS44 0199 E66C ; read key with time limit -- MOS44 0200 E66C ; in: Y>=0 => X=lo-count, Y=hi-count (centiseconds) -- MOS44 0201 E66C ; Y<0 => X=NOT(key-matrix-address) -- MOS44 0202 E66C ; out: Y>=0 => Y=$00 => X=character -- MOS44 0203 E66C ; Y=$1B => escape condition detected -- MOS44 0204 E66C ; Y=$FF => timeout -- MOS44 0205 E66C ; Y<0 => X=0 => key not pressed -- MOS44 0206 E66C ; X<>0 => key pressed -- MOS44 0207 E66C 87 E7 & INKY -- MOS44 0208 E66E -- MOS44 0209 E66E ; -- MOS44 0210 E66E ; $82 -- MOS44 0211 E66E ; read machine high order address -- MOS44 0212 E66E ; out: X = lo-component, Y = hi-component -- MOS44 0213 E66E 9D E7 & RMHA -- MOS44 0214 E670 -- MOS44 0215 E670 ; -- MOS44 0216 E670 ; $83 -- MOS44 0217 E670 ; read operating system high water mark -- MOS44 0218 E670 ; out: X = lo-address, Y = hi-address -- MOS44 0219 E670 B4 F0 & RMLA -- MOS44 0220 E672 -- MOS44 0221 E672 ; -- MOS44 0222 E672 ; $84 -- MOS44 0223 E672 ; read address of start of current screen mode -- MOS44 0224 E672 ; out: X = lo-address, Y = hi-address -- MOS44 0225 E672 B3 D8 & TOPCMD -- MOS44 0226 E674 -- MOS44 0227 E674 ; -- MOS44 0228 E674 ; $85 -- MOS44 0229 E674 ; read address of start of screen for mode X -- MOS44 0230 E674 ; in: X = mode -- MOS44 0231 E674 ; out: X = lo-address, Y = hi-address -- MOS44 0232 E674 B6 D8 & TOPMDX -- MOS44 0233 E676 -- MOS44 0234 E676 ; -- MOS44 0235 E676 ; $86 -- MOS44 0236 E676 ;; read text cursor position -- MOS44 0237 E676 ; out: X = x-text-coord, Y = y-text-coord -- MOS44 0238 E676 E3 D5 & CSRPOS -- MOS44 0239 E678 -- MOS44 0240 E678 ; -- MOS44 0241 E678 ; $87 -- MOS44 0242 E678 ;; read character at text cursor -- MOS44 0243 E678 ; out: X=0 => no character at cursor position -- MOS44 0244 E678 ; X<>0 => X=character -- MOS44 0245 E678 ; Y = current screen mode MOS44 MOS44 MOS44 MOS44 Acorn macro assembler Page 91 MOS44 MOS44 OSBYTE routines MOS44 -- MOS44 0246 E678 5B D7 & READCH -- MOS44 0247 E67A -- MOS44 0248 E67A ; -- MOS44 0249 E67A ; $88 -- MOS44 0250 E67A ; *CODE X, Y -- MOS44 0251 E67A ; in: X = arg, Y = arg -- MOS44 0252 E67A ; out: C = return code -- MOS44 0253 E67A ; X = return code -- MOS44 0254 E67A ; Y = return code -- MOS44 0255 E67A CC E6 & MCODE -- MOS44 0256 E67C -- MOS44 0257 E67C ; -- MOS44 0258 E67C ; $89 -- MOS44 0259 E67C ; *MOTOR X, Y -- MOS44 0260 E67C ; in: X=0 => turn motor off -- MOS44 0261 E67C ; X=1 => turn motor on -- MOS44 0262 E67C ; Y => motor selection -- MOS44 0263 E67C F3 E6 & MOTOR ;MOTOR command; $89 -- MOS44 0264 E67E -- MOS44 0265 E67E ; -- MOS44 0266 E67E ; $8A -- MOS44 0267 E67E ; insert character into buffer -- MOS44 0268 E67E ; in: X = bufferid, Y = character -- MOS44 0269 E67E 27 E5 & INSERT -- MOS44 0270 E680 -- MOS44 0271 E680 ; -- MOS44 0272 E680 ; $8B -- MOS44 0273 E680 ; *OPT X, Y -- MOS44 0274 E680 ; in: X = arg, Y = arg (effect is filing system dependent) -- MOS44 0275 E680 C4 F0 & OPT -- MOS44 0276 E682 -- MOS44 0277 E682 ; -- MOS44 0278 E682 ; $8C -- MOS44 0279 E682 ; *TAPE X, Y -- MOS44 0280 E682 ; in: X=0 => tape filing system at default baud rate (1200 baud) -- MOS44 0281 E682 ; X=3 => tape filing system at 300 baud -- MOS44 0282 E682 ; X=12 => tape filing system at 1200 baud -- MOS44 0283 E682 ; Y=$00 => tape filing system is cassette -- MOS44 0284 E682 ; Y=$FF => tape filing system is ROMs -- MOS44 0285 E682 4C F1 & TAPE -- MOS44 0286 E684 -- MOS44 0287 E684 ; -- MOS44 0288 E684 ; $8D -- MOS44 0289 E684 ; *ROM X, Y -- MOS44 0290 E684 ; X and Y ignored -- MOS44 0291 E684 4C F1 & CROM -- MOS44 0292 E686 -- MOS44 0293 E686 ; -- MOS44 0294 E686 ; $8E -- MOS44 0295 E686 ; enter language -- MOS44 0296 E686 ; in: X = ROMid of language, Y = arg -- MOS44 0297 E686 B1 DB & SELANG -- MOS44 0298 E688 -- MOS44 0299 E688 ; -- MOS44 0300 E688 ; $8F -- MOS44 0301 E688 ; call paged ROM function -- MOS44 0302 E688 ; in: X = reason code, Y = arg -- MOS44 0303 E688 ; out: C = return code -- MOS44 0304 E688 ; Y = return code -- MOS44 0305 E688 71 F1 & SVOP -- MOS44 0306 E68A -- MOS44 0307 E68A ; -- MOS44 0308 E68A ; $90 -- MOS44 0309 E68A ; alter TV characteristics -- MOS44 0310 E68A ; in: X = vertical sync adjust, Y = interlace adjust -- MOS44 0311 E68A 4F EB & TV -- MOS44 0312 E68C -- MOS44 0313 E68C ; -- MOS44 0314 E68C ; $91 -- MOS44 0315 E68C ; remove character from buffer -- MOS44 0316 E68C ; in: X = bufferid -- MOS44 0317 E68C ; out: C=0 => Y=character -- MOS44 0318 E68C ; C=1 => buffer empty -- MOS44 0319 E68C D8 E4 & REMOV -- MOS44 0320 E68E -- MOS44 0321 E68E [ MOS125 = &FF -- MOS44 0360 E68E | -- MOS44 0361 E68E ; -- MOS44 0362 E68E ; $92 -- MOS44 0363 E68E ; read from FRED -- MOS44 0364 E68E ; in: X = offset -- MOS44 0365 E68E ; out: Y = value -- MOS44 0366 E68E 46 EA & CHEQUE -- MOS44 0367 E690 -- MOS44 0368 E690 ; -- MOS44 0369 E690 ; $93 -- MOS44 0370 E690 ; write to FRED -- MOS44 0371 E690 ; in: X = offset, Y = value -- MOS44 0372 E690 46 EA & CHEQUE -- MOS44 0373 E692 -- MOS44 0374 E692 ; -- MOS44 0375 E692 ; $94 -- MOS44 0376 E692 ; read from JIM -- MOS44 0377 E692 ; in: X = offset -- MOS44 0378 E692 ; out: Y = value -- MOS44 0379 E692 46 EA & CHEQUE -- MOS44 0380 E694 -- MOS44 0381 E694 ; -- MOS44 0382 E694 ; $95 -- MOS44 0383 E694 ; write to JIM -- MOS44 0384 E694 ; in: X = offset, Y = value -- MOS44 0385 E694 46 EA & CHEQUE -- MOS44 0386 E696 -- MOS44 0387 E696 ; -- MOS44 0388 E696 ; $96 -- MOS44 0389 E696 ; read from SHEILA -- MOS44 0390 E696 ; in: X = offset -- MOS44 0391 E696 ; out: Y = value -- MOS44 0392 E696 46 EA & CHEQUE -- MOS44 0393 E698 -- MOS44 0394 E698 ; -- MOS44 0395 E698 ; $97 -- MOS44 0396 E698 ; write to SHEILA -- MOS44 0397 E698 ; in: X = offset, Y = value -- MOS44 0398 E698 46 EA & CHEQUE -- MOS44 0399 E69A ] -- MOS44 0400 E69A -- MOS44 0401 E69A ; -- MOS44 0402 E69A ; $98 -- MOS44 0403 E69A ; examine character in buffer -- MOS44 0404 E69A ; in: X = bufferid MOS44 MOS44 MOS44 MOS44 Acorn macro assembler Page 92 MOS44 MOS44 OSBYTE routines MOS44 -- MOS44 0405 E69A ; out: C=0 => Y=character -- MOS44 0406 E69A ; C=1 => buffer empty -- MOS44 0407 E69A D3 E4 & EXAM -- MOS44 0408 E69C -- MOS44 0409 E69C ; -- MOS44 0410 E69C ; $99 -- MOS44 0411 E69C ; insert character into buffer dealing with ESC code -- MOS44 0412 E69C ; in: X = bufferid, Y = character -- MOS44 0413 E69C 6A E5 & RNSRT -- MOS44 0414 E69E -- MOS44 0415 E69E ; -- MOS44 0416 E69E ;; $9A -- MOS44 0417 E69E ; update vidproc control register -- MOS44 0418 E69E ; in: X = value -- MOS44 0419 E69E 28 EA & VP0 -- MOS44 0420 E6A0 -- MOS44 0421 E6A0 ; -- MOS44 0422 E6A0 ; $9B -- MOS44 0423 E6A0 ; update vidproc palette register -- MOS44 0424 E6A0 ; in: X = value EOR $07 -- MOS44 0425 E6A0 39 EA & VP1 -- MOS44 0426 E6A2 -- MOS44 0427 E6A2 ; -- MOS44 0428 E6A2 ; $9C -- MOS44 0429 E6A2 ; update 6850 ACIA -- MOS44 0430 E6A2 ; in: X = value, Y = mask -- MOS44 0431 E6A2 18 E2 & RS423 -- MOS44 0432 E6A4 -- MOS44 0433 E6A4 ; -- MOS44 0434 E6A4 ; $9D -- MOS44 0435 E6A4 ; fast tube BPUT -- MOS44 0436 E6A4 ; in: X = byte, Y = handle -- MOS44 0437 E6A4 66 FF & FXBPUT -- MOS44 0438 E6A6 -- MOS44 0439 E6A6 ; -- MOS44 0440 E6A6 ; $9E -- MOS44 0441 E6A6 ; read from speech chip -- MOS44 0442 E6A6 ; in: Y = command -- MOS44 0443 E6A6 ; out: Y = result -- MOS44 0444 E6A6 A9 EE & RSPECH -- MOS44 0445 E6A8 -- MOS44 0446 E6A8 ; -- MOS44 0447 E6A8 ; $9F -- MOS44 0448 E6A8 ; write to speech chip -- MOS44 0449 E6A8 ; in: Y = command -- MOS44 0450 E6A8 BB EE & WSPECH -- MOS44 0451 E6AA -- MOS44 0452 E6AA ; -- MOS44 0453 E6AA ; $A0 -- MOS44 0454 E6AA ; read VDU variables -- MOS44 0455 E6AA ; in: X = index -- MOS44 0456 E6AA ; out: X = variable0, Y = variable1 -- MOS44 0457 E6AA E9 E9 & VDUVAR -- MOS44 0458 E6AC -- MOS44 0459 E6AC ; -- MOS44 0460 E6AC 00A1 BYTEH * .-BYTET2:SHR: 1+BYTEM ;next entry in BYTET table (hi component) -- MOS44 0461 E6AC ; -- MOS44 0462 E6AC C5 E9 & SETV ;set variable -- MOS44 0463 E6AE -- MOS44 0464 E6AE ; -- MOS44 0465 E6AE CE E6 & JMIUSR ;OSWORD calls >=$E0 -- MOS44 0466 E6B0 -- MOS44 0467 E6B0 -- MOS44 0468 E6B0 -- MOS44 0469 E6B0 WORDT ;table for OSWORD. N.B. lo-byte followed by hi-byte -- MOS44 0470 E6B0 ; -- MOS44 0471 E6B0 27 E9 & RDLN ;read line; $00 -- MOS44 0472 E6B2 -- MOS44 0473 E6B2 ; -- MOS44 0474 E6B2 FD E8 & RATM ;read absolute time; $01 -- MOS44 0475 E6B4 -- MOS44 0476 E6B4 ; -- MOS44 0477 E6B4 0C E9 & WATM ;write absolute time; $02 -- MOS44 0478 E6B6 -- MOS44 0479 E6B6 ; -- MOS44 0480 E6B6 F9 E8 & RITM ;read interval time; $03 -- MOS44 0481 E6B8 -- MOS44 0482 E6B8 ; -- MOS44 0483 E6B8 10 E9 & WITM ;write interval time; $04 -- MOS44 0484 E6BA -- MOS44 0485 E6BA ; -- MOS44 0486 E6BA 6A EA & PEEK ;PEEK; $05 -- MOS44 0487 E6BC -- MOS44 0488 E6BC ; -- MOS44 0489 E6BC 6B EA & POKE ;POKE; $06 -- MOS44 0490 E6BE -- MOS44 0491 E6BE ; -- MOS44 0492 E6BE 0007 OSWSND * .-WORDT:SHR: 1 -- MOS44 0493 E6BE ; -- MOS44 0494 E6BE 59 E8 & NOTE ;sound; $07 -- MOS44 0495 E6C0 -- MOS44 0496 E6C0 ; -- MOS44 0497 E6C0 DA E8 & NVLP ;define envelope; $08 -- MOS44 0498 E6C2 -- MOS44 0499 E6C2 ; -- MOS44 0500 E6C2 34 C7 & RPXLXY ;read pixel at given coordinate to X; $09 -- MOS44 0501 E6C4 -- MOS44 0502 E6C4 ; -- MOS44 0503 E6C4 CF CB & RCHDEF ;read character definition of XY to XY+1..8; $0A -- MOS44 0504 E6C6 -- MOS44 0505 E6C6 ; -- MOS44 0506 E6C6 7A C7 & RPALET ;read palette for XY to XY+1..4; $0B -- MOS44 0507 E6C8 -- MOS44 0508 E6C8 ; -- MOS44 0509 E6C8 C6 C8 & PRPAL ;programme palette; $0C -- MOS44 0510 E6CA -- MOS44 0511 E6CA ; -- MOS44 0512 E6CA 7F D5 & CSREAD ;cursor read; $0D -- MOS44 0513 E6CC -- MOS44 0514 E6CC ; -- MOS44 0515 E6CC 000E WORDN * .-WORDT:SHR: 1 ;number of entries in WORDT table -- MOS44 0516 E6CC -- MOS44 0517 E6CC -- MOS44 0518 E6CC [ NOSP = &00 -- MOS44 0520 E6CC | -- MOS44 0521 E6CC MCODE ;call user code -- MOS44 0522 E6CC A9 00 LDAIM ZERO -- MOS44 0523 E6CE 6C 00 02 JMIUSR JMI USRVEC ;user OSBYTE call/OSWORD calls -- MOS44 0524 E6D1 ] -- MOS44 0525 E6D1 -- MOS44 0526 E6D1 MOS44 MOS44 MOS44 MOS44 Acorn macro assembler Page 93 MOS44 MOS44 OSBYTE routines MOS44 -- MOS44 0527 E6D1 ; OSBYTE specific routines -- MOS44 0528 E6D1 ; N.B. routines must exit with PLP to restore -- MOS44 0529 E6D1 ; caller's interrupt state -- MOS44 0530 E6D1 CESCP ;clear escape flag ad purge selected input buffer -- MOS44 0531 E6D1 A2 00 LDXIM ZERO ;indicate escape not cleared -- MOS44 0532 E6D3 24 FF BIT ESCFLG -- MOS44 0533 E6D5 10 11 BPL CESCPC ;[no escape to clear] MOS44 0533 E6D5 v6E MOS44 0534 E6D7 ; bypass procedure ? MOS44 0533 E6D5 v6E MOS44 0535 E6D7 AD 76 02 LDA EAOPT MOS44 0533 E6D5 v6E MOS44 0536 E6DA D0 0A BNE CESCX ;[bypass normal acknowledge procedure] MOS44 0533 E6D5 v6E MOS44 0537 E6DC ; Z=1, A=$00 MOS44 0533 E6D5 v6E MOS44 0538 E6DC ; close exec file MOS44 0533 E6D5 v6E MOS44 0539 E6DC 58 CLI ;********** (close may be a long operation) MOS44 0533 E6D5 v6E MOS44 0540 E6DD 8D 69 02 STA LINES ;reset page mode page origin MOS44 0533 E6D5 v6E MOS44 0541 E6E0 20 C7 F6 JSR EXEC ;just close exec file, N.B. needs Z=1, A=$00 MOS44 0533 E6D5 v6E MOS44 0542 E6E3 ; flush all buffers and clear soft key expansion MOS44 0533 E6D5 v6E MOS44 0543 E6E3 20 A0 E1 JSR FLSHAL ;N.B. also kills sound AND cancels VDU queueing MOS44 0533 E6D5 v6E MOS44 0544 E6E6 CESCX MOS44 0533 E6D5 v6E MOS44 0545 E6E6 A2 FF LDXIM &FF ;indicate escape cleared MOS44 0533 E6D5 v6E MOS44 0546 E6E8 CESCPC ;clear system escape flag MOS44 0533 E6D5 v6E MOS44 0547 E6E8 18 CLC -- MOS44 0548 E6E9 CESCPS ;set system escape flag (N.B. C=1) -- MOS44 0549 E6E9 66 FF ROR ESCFLG -- MOS44 0550 E6EB 2C 7A 02 BIT TUBEM -- MOS44 0551 E6EE [ MOS125 = &FF -- MOS44 0554 E6EE | -- MOS44 0555 E6EE 10 33 BPL TESCO ;[tube inactive] MOS44 0555 E6EE v4C MOS44 0556 E6F0 ] MOS44 0555 E6EE v4C MOS44 0557 E6F0 ; MOS44 0555 E6EE v4C MOS44 0558 E6F0 TESC MOS44 0555 E6EE v4C MOS44 0559 E6F0 4C 03 04 JMP TBESC ;tube escape MOS44 0555 E6EE v4C MOS44 0560 E6F3 MOS44 0555 E6EE v4C MOS44 0561 E6F3 MOS44 0555 E6EE v4C MOS44 0562 E6F3 MOTOR ;control cassette motor MOS44 0555 E6EE v4C MOS44 0563 E6F3 ; on entry: X=0 => motor off MOS44 0555 E6EE v4C MOS44 0564 E6F3 ; X<>0 => motor on MOS44 0555 E6EE v4C MOS44 0565 E6F3 ; N.B. previous instruction was LDX MOS44 0555 E6EE v4C MOS44 0566 E6F3 AD 82 02 LDA SPREGA MOS44 0555 E6EE v4C MOS44 0567 E6F6 A8 TAY ;Y := old value MOS44 0555 E6EE v4C MOS44 0568 E6F7 ; MOS44 0555 E6EE v4C MOS44 0569 E6F7 2A ROLA MOS44 0555 E6EE v4C MOS44 0570 E6F8 E0 01 CPXIM &01 ;C=0 => X=0, C=1 => X<>0 MOS44 0555 E6EE v4C MOS44 0571 E6FA 6A RORA MOS44 0555 E6EE v4C MOS44 0572 E6FB 50 1E BVC STASP ;[ALWAYS jump] MOS44 0555 E6EE v4C MOS44 0573 E6FD MOS44 0555 E6EE v4C MOS44 0574 E6FD MOS44 0555 E6EE v4C MOS44 0575 E6FD TXBAUD ;set RS423 transmit baudrate (N.B. A=$08) MOS44 0555 E6EE v4C MOS44 0576 E6FD A9 38 LDAIM &38 MOS44 0555 E6EE v4C MOS44 0577 E6FF RXBAUD ;set RS423 receive baudrate (N.B. A=$07) MOS44 0555 E6EE v4C MOS44 0578 E6FF 49 3F EORIM &3F ;Rx: A=$38, Tx: A=$07 MOS44 0555 E6EE v4C MOS44 0579 E701 85 FA STA MASK MOS44 0555 E6EE v4C MOS44 0580 E703 AC 82 02 LDY SPREGA MOS44 0555 E6EE v4C MOS44 0581 E706 E0 09 CPXIM &09 MOS44 0555 E6EE v4C MOS44 0582 E708 B0 17 BCS BAUD1 ;[bad baud selection] MOS44 0555 E6EE v4C MOS44 0583 E70A 3D D6 E9 ANDAX BAUDS ;extract serproc baud bits MOS44 0555 E6EE v4C MOS44 0584 E70D 85 FB STA BAUD MOS44 0555 E6EE v4C MOS44 0585 E70F 98 TYA MOS44 0555 E6EE v4C MOS44 0586 E710 05 FA ORA MASK MOS44 0555 E6EE v4C MOS44 0587 E712 45 FA EOR MASK ;clear slot for baudrate MOS44 0555 E6EE v4C MOS44 0588 E714 05 FB ORA BAUD MOS44 0555 E6EE v4C MOS44 0589 E716 09 40 ORAIM &40 ;set cassette/RS423 bit MOS44 0555 E6EE v4C MOS44 0590 E718 4D 5D 02 EOR RSCASS ;select cassette/RS423 MOS44 0555 E6EE v4C MOS44 0591 E71B ; MOS44 0555 E6EE v4C MOS44 0592 E71B STASP ;used by MOTOR and RESET MOS44 0555 E6EE v4C MOS44 0593 E71B 8D 82 02 STA SPREGA MOS44 0555 E6EE v4C MOS44 0594 E71E 8D 10 FE STA SERPRC MOS44 0555 E6EE v4C MOS44 0595 E721 ; MOS44 0555 E6EE v4C MOS44 0596 E721 BAUD1 MOS44 0555 E6EE v4C MOS44 0597 E721 TYATAX ;used by TXBAUD, RXBAUD, FSPC, FMRK MOS44 0555 E6EE v4C MOS44 0598 E721 98 TYA MOS44 0686 E778 ^27 MOS44 0599 E722 BADEVT MOS44 0686 E778 ^27 MOS44 0600 E722 AA TAX ;X := old value (bad events appear disabled) MOS44 0686 E778 ^27 MOS44 0601 E723 [ MOS125 = &FF MOS44 0686 E778 ^27 MOS44 0602 E723 | MOS44 0686 E778 ^27 MOS44 0603 E723 TESCO MOS44 0686 E778 ^27 MOS44 0604 E723 ] MOS44 0686 E778 ^27 MOS44 0605 E723 60 RTS MOS44 0686 E778 ^27 MOS44 0606 E724 MOS44 0686 E778 ^27 MOS44 0607 E724 MOS44 0686 E778 ^27 MOS44 0608 E724 FMRK ;set flash mark, Y=0, C=1 MOS44 0686 E778 ^27 MOS44 0609 E724 C8 INY MOS44 0686 E778 ^27 MOS44 0610 E725 18 CLC MOS44 0686 E778 ^27 MOS44 0611 E726 ; MOS44 0686 E778 ^27 MOS44 0612 E726 ; Y=1, C=0 MOS44 0686 E778 ^27 MOS44 0613 E726 ; MOS44 0686 E778 ^27 MOS44 0614 E726 FSPC ;set flash space, Y=0, C=1 MOS44 0686 E778 ^27 MOS44 0615 E726 B9 52 02 LDAAY FLASHB MOS44 0686 E778 ^27 MOS44 0616 E729 ; MOS44 0686 E778 ^27 MOS44 0617 E729 48 PHA MOS44 0686 E778 ^27 MOS44 0618 E72A 8A TXA MOS44 0686 E778 ^27 MOS44 0619 E72B 99 52 02 STAAY FLASHB MOS44 0686 E778 ^27 MOS44 0620 E72E 68 PLA MOS44 0686 E778 ^27 MOS44 0621 E72F ; MOS44 0686 E778 ^27 MOS44 0622 E72F A8 TAY MOS44 0686 E778 ^27 MOS44 0623 E730 ; MOS44 0686 E778 ^27 MOS44 0624 E730 ; C=0 => mark, C=1 => space MOS44 0686 E778 ^27 MOS44 0625 E730 ; FMS0 exit used, despite X not being corrupted MOS44 0686 E778 ^27 MOS44 0626 E730 ; (makes code clearer) MOS44 0686 E778 ^27 MOS44 0627 E730 AD 51 02 LDA FLCNT MOS44 0686 E778 ^27 MOS44 0628 E733 D0 10 BNE FMS1 ;[flash enabled] MOS44 0686 E778 ^27 MOS44 0629 E735 ; 'kick' flash count MOS44 0686 E778 ^27 MOS44 0630 E735 8E 51 02 STX FLCNT MOS44 0686 E778 ^27 MOS44 0631 E738 ; force mark/space (lsb VPREGA := C) MOS44 0686 E778 ^27 MOS44 0632 E738 AD 48 02 LDA VPREGA MOS44 0686 E778 ^27 MOS44 0633 E73B [ MOS125 = &FF MOS44 0686 E778 ^27 MOS44 0638 E73B | MOS44 0686 E778 ^27 MOS44 0639 E73B ;same size, faster, reduce stack load MOS44 0686 E778 ^27 MOS44 0640 E73B 29 FE ANDIM &FE MOS44 0686 E778 ^27 MOS44 0641 E73D 69 00 ADCIM &00 ;V=0 MOS44 0686 E778 ^27 MOS44 0642 E73F ] MOS44 0686 E778 ^27 MOS44 0643 E73F 8D 48 02 STA VPREGA MOS44 0686 E778 ^27 MOS44 0644 E742 8D 20 FE STA VPROC0 MOS44 0686 E778 ^27 MOS44 0645 E745 FMS1 ; chain from clear escape condition routine MOS44 0686 E778 ^27 MOS44 0646 E745 50 DA BVC TYATAX ;[ALWAYS jump] MOS44 0686 E778 ^27 MOS44 0647 E747 MOS44 0686 E778 ^27 MOS44 0648 E747 MOS44 0686 E778 ^27 MOS44 0649 E747 SELIN ;select input MOS44 0686 E778 ^27 MOS44 0650 E747 8A TXA MOS44 0686 E778 ^27 MOS44 0651 E748 29 01 ANDIM &01 ;force legal bufferid MOS44 0686 E778 ^27 MOS44 0652 E74A 48 PHA ;save change MOS44 0686 E778 ^27 MOS44 0653 E74B AD 50 02 LDA RSCTFL ;A := old state of controller status MOS44 MOS44 MOS44 MOS44 Acorn macro assembler Page 94 MOS44 MOS44 OSBYTE routines MOS44 MOS44 0686 E778 ^27 MOS44 0654 E74E 2A ROLA MOS44 0686 E778 ^27 MOS44 0655 E74F E0 01 CPXIM &01 ;C=0 => disable RS423, C=1 => enable RS423 MOS44 0686 E778 ^27 MOS44 0656 E751 6A RORA ;A := new state of controller status MOS44 0686 E778 ^27 MOS44 0657 E752 ; *FX 2,0 disables RS423, *FX 2,(1,2) enables RS423 MOS44 0686 E778 ^27 MOS44 0658 E752 ; if RS423 then enable RS423 Rx interrupt MOS44 0686 E778 ^27 MOS44 0659 E752 CD 50 02 CMP RSCTFL MOS44 0686 E778 ^27 MOS44 0660 E755 08 PHP MOS44 0686 E778 ^27 MOS44 0661 E756 8D 50 02 STA RSCTFL MOS44 0686 E778 ^27 MOS44 0662 E759 8D 08 FE STA RSCTL ;update RS423 control register MOS44 0686 E778 ^27 MOS44 0663 E75C 20 0F E2 JSR RSETX ;set RHITXE if possible MOS44 0686 E778 ^27 MOS44 0664 E75F 28 PLP MOS44 0686 E778 ^27 MOS44 0665 E760 F0 03 BEQ SELIN1 ;branch if no change MOS44 0686 E778 ^27 MOS44 0666 E762 2C 09 FE BIT RSDATA ;purge character in controller MOS44 0686 E778 ^27 MOS44 0667 E765 ; this purges data register if: disabled state -> enabled state MOS44 0686 E778 ^27 MOS44 0668 E765 ; this does not matter if: enabled state -> disabled state MOS44 0686 E778 ^27 MOS44 0669 E765 SELIN1 MOS44 0686 E778 ^27 MOS44 0670 E765 AE 41 02 LDX RDCHSW ;X := old value MOS44 0686 E778 ^27 MOS44 0671 E768 68 PLA MOS44 0686 E778 ^27 MOS44 0672 E769 8D 41 02 STA RDCHSW ;update value MOS44 0686 E778 ^27 MOS44 0673 E76C 60 RTS MOS44 0686 E778 ^27 MOS44 0674 E76D MOS44 0686 E778 ^27 MOS44 0675 E76D MOS44 0686 E778 ^27 MOS44 0676 E76D MDSABL ;disable event X MOS44 0686 E778 ^27 MOS44 0677 E76D ; N.B. Y=0 MOS44 0686 E778 ^27 MOS44 0678 E76D 98 TYA ;A := 0 MOS44 0686 E778 ^27 MOS44 0679 E76E ;* LDAIM ZERO MOS44 0686 E778 ^27 MOS44 0680 E76E ENABLE ;enable event X (N.B. A<>$00) MOS44 0686 E778 ^27 MOS44 0681 E76E E0 0A CPXIM NEVENT MOS44 0686 E778 ^27 MOS44 0682 E770 B0 B0 BCS BADEVT MOS44 0686 E778 ^27 MOS44 0683 E772 BC BF 02 LDYAX EVENTS MOS44 0686 E778 ^27 MOS44 0684 E775 9D BF 02 STAAX EVENTS MOS44 0686 E778 ^27 MOS44 0685 E778 ; MOS44 0686 E778 ^27 MOS44 0686 E778 50 A7 BVC TYATAX ;[ALWAYS jump] -- MOS44 0687 E77A -- MOS44 0688 E77A -- MOS44 0689 E77A SETADC ;set number of ADC channels to scan -- MOS44 0690 E77A ; N.B. preceeding instruction was LDX -- MOS44 0691 E77A ; Y=0 -- MOS44 0692 E77A F0 03 BEQ SETAD1 ;[kill ADC (eventually)] MOS44 0692 E77A v7C MOS44 0693 E77C 20 3F DE JSR ADCBEG ;initiate conversion on channel X, uses Y=0 MOS44 0692 E77A v7C MOS44 0694 E77F ; N.B. X not corrupted MOS44 0692 E77A v7C MOS44 0695 E77F SETAD1 MOS44 0692 E77A v7C MOS44 0696 E77F ; a value of X=0 stops the ADC after the next (external) channel 1 MOS44 0692 E77A v7C MOS44 0697 E77F ; conversion MOS44 0692 E77A v7C MOS44 0698 E77F AD 4D 02 LDA MAXADC -- MOS44 0699 E782 8E 4D 02 STX MAXADC -- MOS44 0700 E785 AA TAX ;X := old value -- MOS44 0701 E786 60 RTS -- MOS44 0702 E787 -- MOS44 0703 E787 -- MOS44 0704 E787 INKY ;read key with time limit -- MOS44 0705 E787 98 TYA -- MOS44 0706 E788 30 0B BMI RDKY MOS44 0706 E788 v74 MOS44 0707 E78A 58 CLI ;**** ENABLE INTERRUPTS MOS44 0706 E788 v74 MOS44 0708 E78B 20 6E DE JSR INKEY MOS44 0706 E788 v74 MOS44 0709 E78E B0 03 BCS INKY1 ;[escape detected or count exhausted] MOS44 0706 E788 v74 MOS44 0710 E790 ; MOS44 0706 E788 v74 MOS44 0711 E790 ; character read MOS44 0706 E788 v74 MOS44 0712 E790 ; MOS44 0706 E788 v74 MOS44 0713 E790 AA TAX ;X := character (INKEY) or lo-count (BUFN) MOS44 0706 E788 v74 MOS44 0714 E791 A9 00 LDAIM ZERO ;Y = 0 => success MOS44 0706 E788 v74 MOS44 0715 E793 ; MOS44 0706 E788 v74 MOS44 0716 E793 INKY1 ;escape detected or count exhausted, C=1 MOS44 0706 E788 v74 MOS44 0717 E793 A8 TAY ;Y < $80 => escape, Y >= $80 => count exhausted MOS44 0706 E788 v74 MOS44 0718 E794 60 RTS MOS44 0706 E788 v74 MOS44 0719 E795 MOS44 0706 E788 v74 MOS44 0720 E795 MOS44 0706 E788 v74 MOS44 0721 E795 RDKY ;C=1, V=0, read key addressed by X MOS44 0706 E788 v74 MOS44 0722 E795 ; N.B. interrupts disabled MOS44 0706 E788 v74 MOS44 0723 E795 ; MOS44 0706 E788 v74 MOS44 0724 E795 ; test key at matrix address MOS44 0706 E788 v74 MOS44 0725 E795 ; MOS44 0706 E788 v74 MOS44 0726 E795 [ $Tutu MOS44 0706 E788 v74 MOS44 0734 E795 | MOS44 0706 E788 v74 MOS44 0735 E795 8A TXA -- MOS44 0736 E796 49 7F EORIM &7F -- MOS44 0737 E798 AA TAX -- MOS44 0738 E799 20 97 F0 JSR JMIKEY -- MOS44 0739 E79C 2A ROLA ;result into C -- MOS44 0740 E79D ] -- MOS44 0741 E79D ; -- MOS44 0742 E79D BADADC ;entered with C=1 -- MOS44 0743 E79D RMHA ;entered with C=1 -- MOS44 0744 E79D ; C=0 => return 0, C=1 => return -1 -- MOS44 0745 E79D A2 FF LDXIM &FF ;N.B. I/O processor is notionally located at address $FFFFxxxx MOS44 0808 E7B9 ^62 MOS44 0746 E79F A0 FF LDYIM &FF MOS44 0808 E7B9 ^62 MOS44 0747 E7A1 B0 02 BCS RDKY0 MOS44 0808 E7B9 ^62 MOS44 0748 E7A3 ; INKEY entry (key open) MOS44 0808 E7B9 ^62 MOS44 0749 E7A3 E8 INX ;X=0 MOS44 0808 E7B9 ^62 MOS44 0750 E7A4 ; invalid soft key read, return Y<>0 MOS44 0808 E7B9 ^62 MOS44 0751 E7A4 C8 INY ;Y=0 (except for soft key read entry) MOS44 0808 E7B9 ^62 MOS44 0752 E7A5 RDKY0 MOS44 0808 E7B9 ^62 MOS44 0753 E7A5 60 RTS MOS44 0808 E7B9 ^62 MOS44 0754 E7A6 MOS44 0808 E7B9 ^62 MOS44 0755 E7A6 MOS44 0808 E7B9 ^62 MOS44 0756 E7A6 BUFN ;count entries in buffer, called by FX ADVAL with negative argument MOS44 0808 E7B9 ^62 MOS44 0757 E7A6 ; -N gives count for buffer with external id N MOS44 0808 E7B9 ^62 MOS44 0758 E7A6 ; C=1 (by FX conventions) MOS44 0808 E7B9 ^62 MOS44 0759 E7A6 8A TXA MOS44 0808 E7B9 ^62 MOS44 0760 E7A7 49 FF EORIM &FF MOS44 0808 E7B9 ^62 MOS44 0761 E7A9 AA TAX ;X := bufferid MOS44 0808 E7B9 ^62 MOS44 0762 E7AA ; MOS44 0808 E7B9 ^62 MOS44 0763 E7AA ; count entries (in)/(remaining in) buffer given by X MOS44 0808 E7B9 ^62 MOS44 0764 E7AA ; returns: MOS44 0808 E7B9 ^62 MOS44 0765 E7AA ; number of entries present for input buffers MOS44 0808 E7B9 ^62 MOS44 0766 E7AA ; number of entries remaining for output buffers MOS44 0808 E7B9 ^62 MOS44 0767 E7AA ; MOS44 0808 E7B9 ^62 MOS44 0768 E7AA E0 02 CPXIM OUTPUT MOS44 0808 E7B9 ^62 MOS44 0769 E7AC ; C=0 => count used entries MOS44 0808 E7B9 ^62 MOS44 0770 E7AC ; C=1 => count free slots MOS44 0808 E7B9 ^62 MOS44 0771 E7AC ; MOS44 0808 E7B9 ^62 MOS44 0772 E7AC JMICNT MOS44 0808 E7B9 ^62 MOS44 0773 E7AC B8 CLV ;V=0 => count buffer entry MOS44 0808 E7B9 ^62 MOS44 0774 E7AD 50 03 BVC JMICNP ;[ALWAYS jump] MOS44 0808 E7B9 ^62 MOS44 0775 E7AF ; MOS44 0808 E7B9 ^62 MOS44 0776 E7AF 2C 50 D9 JMIPUR BIT FFBYT ;V=1 MOS44 0808 E7B9 ^62 MOS44 0777 E7B2 6C 2E 02 JMICNP JMI CNPVEC ;use indirection (defaults to CNP) MOS44 0808 E7B9 ^62 MOS44 0778 E7B5 ; return count in X (lo) and Y (hi) MOS44 0808 E7B9 ^62 MOS44 0779 E7B5 MOS44 0808 E7B9 ^62 MOS44 0780 E7B5 MOS44 0808 E7B9 ^62 MOS44 0781 E7B5 [ MOS125 = &FF MOS44 MOS44 MOS44 MOS44 Acorn macro assembler Page 95 MOS44 MOS44 OSBYTE routines MOS44 MOS44 0808 E7B9 ^62 MOS44 0796 E7B5 ] MOS44 0808 E7B9 ^62 MOS44 0797 E7B5 MOS44 0808 E7B9 ^62 MOS44 0798 E7B5 MOS44 0808 E7B9 ^62 MOS44 0799 E7B5 RADCX ;read ADC channel X MOS44 0808 E7B9 ^62 MOS44 0800 E7B5 [ MOS125 = &FF MOS44 0808 E7B9 ^62 MOS44 0805 E7B5 | MOS44 0808 E7B9 ^62 MOS44 0806 E7B5 30 EF BMI BUFN ;[count entries in buffer] MOS44 0808 E7B9 ^62 MOS44 0807 E7B7 E0 05 CPXIM &05 MOS44 0808 E7B9 ^62 MOS44 0808 E7B9 B0 E2 BCS BADADC -- MOS44 0809 E7BB 8A TXA -- MOS44 0810 E7BC F0 08 BEQ FIRE ;[get status of fire buttons] MOS44 0810 E7BC v77 MOS44 0811 E7BE ] MOS44 0810 E7BC v77 MOS44 0812 E7BE ; return latest conversion MOS44 0810 E7BC v77 MOS44 0813 E7BE BC B9 02 LDYAX ADCHIV -&01 MOS44 0810 E7BC v77 MOS44 0814 E7C1 BD B5 02 LDAAX ADCLOV -&01 MOS44 0810 E7BC v77 MOS44 0815 E7C4 AA TAX ;X := lo-byte MOS44 0810 E7BC v77 MOS44 0816 E7C5 60 RTS MOS44 0810 E7BC v77 MOS44 0817 E7C6 MOS44 0810 E7BC v77 MOS44 0818 E7C6 MOS44 0810 E7BC v77 MOS44 0819 E7C6 FIRE ;get status of fire buttons MOS44 0810 E7BC v77 MOS44 0820 E7C6 [ MOS125 = &FF MOS44 0810 E7BC v77 MOS44 0828 E7C6 | MOS44 0810 E7BC v77 MOS44 0829 E7C6 ; X=0, A=0, C=0 MOS44 0810 E7BC v77 MOS44 0830 E7C6 ED 40 FE SBC PBQ ;take one's complement of system VIA port B -- MOS44 0831 E7C9 6A RORA -- MOS44 0832 E7CA 6A RORA -- MOS44 0833 E7CB 6A RORA -- MOS44 0834 E7CC 6A RORA -- MOS44 0835 E7CD ] -- MOS44 0836 E7CD 29 03 ANDIM &03 ;A := fire buttons -- MOS44 0837 E7CF AC BE 02 LDY ADCFLG ;return latest conversion number -- MOS44 0838 E7D2 ; clear latest conversion number -- MOS44 0839 E7D2 8E BE 02 STX ADCFLG -- MOS44 0840 E7D5 AA TAX ;return status of fire buttons in b0 and b1 -- MOS44 0841 E7D6 60 RTS -- MOS44 0842 E7D7 -- MOS44 0843 E7D7 -- MOS44 0844 E7D7 LNK MOS46 -- MOS46 0001 E7D7 ; > MOS46 -- MOS46 0002 E7D7 TTL MOS46 OSWORD routines -- MOS46 0003 E7D7 OPT MOS46 MOS46 MOS46 MOS46 MOS46 Acorn macro assembler Page 96 MOS46 MOS46 OSWORD routines MOS46 -- MOS46 0004 E7D7 ;(c) 1981 ACORN Computers Limited -- MOS46 0005 E7D7 ;BBC MOS -- MOS46 0006 E7D7 ;Change record: -- MOS46 0007 E7D7 ;203 01-May-82 PB Fix EXTSND bug -- MOS46 0008 E7D7 ;041 15-Aug-81 PB First edition -- MOS46 0009 E7D7 ;Author(s): -- MOS46 0010 E7D7 ;PB Paul Bond -- MOS46 0011 E7D7 -- MOS46 0012 E7D7 -- MOS46 0013 E7D7 BYTE ;OSBYTE call -- MOS46 0014 E7D7 ; -- MOS46 0015 E7D7 ; uses: -- MOS46 0016 E7D7 ; BYTEX, BYTEY (may be shared by sei-routines) -- MOS46 0017 E7D7 ; JMILO, JMIHI -- MOS46 0018 E7D7 ; -- MOS46 0019 E7D7 48 PHA -- MOS46 0020 E7D8 08 PHP -- MOS46 0021 E7D9 78 SEI ;**** DISABLE INTERRUPTS **** -- MOS46 0022 E7DA ; -- MOS46 0023 E7DA ; save A and X -- MOS46 0024 E7DA ; -- MOS46 0025 E7DA 85 EF STA BYTEA -- MOS46 0026 E7DC 86 F0 STX BYTEX -- MOS46 0027 E7DE 84 F1 STY BYTEY -- MOS46 0028 E7E0 ; -- MOS46 0029 E7E0 A2 07 LDXIM SVBYTE ;illegal codes are referred to paged ROM -- MOS46 0030 E7E2 ; -- MOS46 0031 E7E2 ; check for legal code -- MOS46 0032 E7E2 ; -- MOS46 0033 E7E2 C9 75 CMPIM BYTEM -- MOS46 0034 E7E4 90 41 BCC BYTELO ;[interactive code] MOS46 0034 E7E4 v3E MOS46 0035 E7E6 ; MOS46 0034 E7E4 v3E MOS46 0036 E7E6 ; code >= BYTEM MOS46 0034 E7E4 v3E MOS46 0037 E7E6 ; MOS46 0034 E7E4 v3E MOS46 0038 E7E6 C9 A1 CMPIM BYTEH MOS46 0034 E7E4 v3E MOS46 0039 E7E8 90 09 BCC BYTEHI ;[code < BYTEH] MOS46 0034 E7E4 v3E MOS46 0040 E7EA ; MOS46 0034 E7E4 v3E MOS46 0041 E7EA ; check for variable setting MOS46 0034 E7E4 v3E MOS46 0042 E7EA ; MOS46 0034 E7E4 v3E MOS46 0043 E7EA C9 A6 CMPIM VORG MOS46 0034 E7E4 v3E MOS46 0044 E7EC 90 3F BCC BYTE0 ;[not a variable setting] MOS46 0034 E7E4 v3E MOS46 0045 E7EE ; MOS46 0034 E7E4 v3E MOS46 0046 E7EE ; set variable MOS46 0034 E7E4 v3E MOS46 0047 E7EE ; MOS46 0034 E7E4 v3E MOS46 0048 E7EE 18 CLC ;force A=BYTEH MOS46 0034 E7E4 v3E MOS46 0049 E7EF ; MOS46 0034 E7E4 v3E MOS46 0050 E7EF WORDU ;user OSWORD call, C=1, force A=BYTEH+$01 MOS46 0034 E7E4 v3E MOS46 0051 E7EF ; MOS46 0034 E7E4 v3E MOS46 0052 E7EF A9 A1 LDAIM BYTEH MOS46 0216 E84E ^1F MOS46 0053 E7F1 69 00 ADCIM ZERO ;add in carry (C=0 => variable, C=1 => user OSWORD) MOS46 0216 E84E ^1F MOS46 0054 E7F3 ; MOS46 0216 E84E ^1F MOS46 0055 E7F3 BYTEHI MOS46 0216 E84E ^1F MOS46 0056 E7F3 ; MOS46 0216 E84E ^1F MOS46 0057 E7F3 38 SEC MOS46 0216 E84E ^1F MOS46 0058 E7F4 E9 5F SBCIM BYTEM-BYTEL MOS46 0216 E84E ^1F MOS46 0059 E7F6 ; MOS46 0216 E84E ^1F MOS46 0060 E7F6 BYTE1 ;construct address of specific OSBYTE routine MOS46 0216 E84E ^1F MOS46 0061 E7F6 ; MOS46 0216 E84E ^1F MOS46 0062 E7F6 0A ASLA ;prepare for Y := 2*code MOS46 0216 E84E ^1F MOS46 0063 E7F7 ; MOS46 0216 E84E ^1F MOS46 0064 E7F7 38 SEC ;indicate OSBYTE call MOS46 0216 E84E ^1F MOS46 0065 E7F8 ; MOS46 0216 E84E ^1F MOS46 0066 E7F8 BYTE2 ;C=0 => OSWORD call MOS46 0216 E84E ^1F MOS46 0067 E7F8 ; MOS46 0216 E84E ^1F MOS46 0068 E7F8 84 F1 STY BYTEY ;save Y MOS46 0216 E84E ^1F MOS46 0069 E7FA ; MOS46 0216 E84E ^1F MOS46 0070 E7FA A8 TAY ;Y := 2*code MOS46 0216 E84E ^1F MOS46 0071 E7FB ; MOS46 0216 E84E ^1F MOS46 0072 E7FB ; allow net to indirect OS call MOS46 0216 E84E ^1F MOS46 0073 E7FB ; MOS46 0216 E84E ^1F MOS46 0074 E7FB [ MOS125 = &FF MOS46 0216 E84E ^1F MOS46 0082 E7FB | MOS46 0216 E84E ^1F MOS46 0083 E7FB AD 5E 02 LDA NETIOC MOS46 0216 E84E ^1F MOS46 0084 E7FE B8 CLV MOS46 0216 E84E ^1F MOS46 0085 E7FF 10 06 BPL NET1 ;[net not indirecting OS calls] MOS46 0216 E84E ^1F MOS46 0086 E801 ; MOS46 0216 E84E ^1F MOS46 0087 E801 ; indirect OS call thru net MOS46 0216 E84E ^1F MOS46 0088 E801 ; MOS46 0216 E84E ^1F MOS46 0089 E801 8A TXA ;A := reason code MOS46 0216 E84E ^1F MOS46 0090 E802 ] MOS46 0216 E84E ^1F MOS46 0091 E802 20 F5 E5 JSR JMINET ;args in BYTEA, BYTEX, BYTEY (call type in A) MOS46 0216 E84E ^1F MOS46 0092 E805 70 1A BVS OSRET ;[net substituted result] MOS46 0216 E84E ^1F MOS46 0093 E807 ; MOS46 0216 E84E ^1F MOS46 0094 E807 ; construct specific OSBYTE routine address MOS46 0216 E84E ^1F MOS46 0095 E807 ; MOS46 0216 E84E ^1F MOS46 0096 E807 NET1 ;call internal routine MOS46 0216 E84E ^1F MOS46 0097 E807 B9 29 E6 LDAAY BYTET+&01 ;hi-byte MOS46 0216 E84E ^1F MOS46 0098 E80A 85 FB STA JMIHI MOS46 0216 E84E ^1F MOS46 0099 E80C B9 28 E6 LDAAY BYTET+&00 ;lo-byte MOS46 0216 E84E ^1F MOS46 0100 E80F 85 FA STA JMILO MOS46 0216 E84E ^1F MOS46 0101 E811 ; MOS46 0216 E84E ^1F MOS46 0102 E811 ; enter specific OSBYTE routine MOS46 0216 E84E ^1F MOS46 0103 E811 ; MOS46 0216 E84E ^1F MOS46 0104 E811 ; X = SVBYTE or SVWORD MOS46 0216 E84E ^1F MOS46 0105 E811 ; MOS46 0216 E84E ^1F MOS46 0106 E811 ; MOS46 0216 E84E ^1F MOS46 0107 E811 A5 EF LDA BYTEA ;in case OSBYTE call MOS46 0216 E84E ^1F MOS46 0108 E813 A4 F1 LDY BYTEY ;restore Y MOS46 0216 E84E ^1F MOS46 0109 E815 ; MOS46 0216 E84E ^1F MOS46 0110 E815 ; determine type of call MOS46 0216 E84E ^1F MOS46 0111 E815 ; MOS46 0216 E84E ^1F MOS46 0112 E815 B0 04 BCS OSB ;[OSBYTE call] MOS46 0216 E84E ^1F MOS46 0113 E817 ; MOS46 0216 E84E ^1F MOS46 0114 E817 ; OSWORD call MOS46 0216 E84E ^1F MOS46 0115 E817 ; MOS46 0216 E84E ^1F MOS46 0116 E817 A0 00 LDYIM ZERO MOS46 0216 E84E ^1F MOS46 0117 E819 B1 F0 LDAIY WORDX MOS46 0216 E84E ^1F MOS46 0118 E81B ; MOS46 0216 E84E ^1F MOS46 0119 E81B OSB MOS46 0216 E84E ^1F MOS46 0120 E81B ; MOS46 0216 E84E ^1F MOS46 0121 E81B ; ********** V=0 USED BY OSBYTE ROUTINES ********** MOS46 0216 E84E ^1F MOS46 0122 E81B 38 SEC ;used by several routines MOS46 0216 E84E ^1F MOS46 0123 E81C A6 F0 LDX BYTEX ;restore X (N.B. N, Z status used by several routines) MOS46 0216 E84E ^1F MOS46 0124 E81E 20 87 F0 JSR JMI ;enter specific routine MOS46 0216 E84E ^1F MOS46 0125 E821 ; MOS46 0216 E84E ^1F MOS46 0126 E821 OSRET MOS46 0216 E84E ^1F MOS46 0127 E821 ; MOS46 0216 E84E ^1F MOS46 0128 E821 6A RORA ;save C MOS46 0216 E84E ^1F MOS46 0129 E822 28 PLP MOS46 0216 E84E ^1F MOS46 0130 E823 2A ROLA ;restore C (needed by readline routine - BASIC expects it) MOS46 0216 E84E ^1F MOS46 0131 E824 68 PLA ;restore A MOS46 MOS46 MOS46 MOS46 Acorn macro assembler Page 97 MOS46 MOS46 OSWORD routines MOS46 MOS46 0216 E84E ^1F MOS46 0132 E825 B8 CLV ;indicate call recognised MOS46 0216 E84E ^1F MOS46 0133 E826 60 RTS MOS46 0216 E84E ^1F MOS46 0134 E827 MOS46 0216 E84E ^1F MOS46 0135 E827 MOS46 0216 E84E ^1F MOS46 0136 E827 [ NOSP = &00 MOS46 0216 E84E ^1F MOS46 0141 E827 ] MOS46 0216 E84E ^1F MOS46 0142 E827 MOS46 0216 E84E ^1F MOS46 0143 E827 BYTELO ;code has top bit clear - use table lo component MOS46 0216 E84E ^1F MOS46 0144 E827 A0 00 LDYIM ZERO ;only one argument, set Y=0 for variable settings and ADC ops MOS46 0216 E84E ^1F MOS46 0145 E829 C9 16 CMPIM BYTEL MOS46 0216 E84E ^1F MOS46 0146 E82B 90 C9 BCC BYTE1 ;[recognised code] MOS46 0216 E84E ^1F MOS46 0147 E82D ; MOS46 0216 E84E ^1F MOS46 0148 E82D ; unrecognised code MOS46 0216 E84E ^1F MOS46 0149 E82D ; MOS46 0216 E84E ^1F MOS46 0150 E82D BYTE0 ;unrecognised OSBYTE code MOS46 0216 E84E ^1F MOS46 0151 E82D WORD0 ;unrecognised OSWORD code (C=1) MOS46 0216 E84E ^1F MOS46 0152 E82D ; force 4 bytes on stack (making 4 before Preg, simulating a return link) MOS46 0216 E84E ^1F MOS46 0153 E82D 08 PHP ;N.B. non-zero byte (SEI mode) MOS46 0216 E84E ^1F MOS46 0154 E82E 08 PHP MOS46 0216 E84E ^1F MOS46 0155 E82F ; MOS46 0216 E84E ^1F MOS46 0156 E82F EXTSND ;entry point used by SOUND (return link still on stack) MOS46 0216 E84E ^1F MOS46 0157 E82F 68 PLA MOS46 0216 E84E ^1F MOS46 0158 E830 68 PLA MOS46 0216 E84E ^1F MOS46 0159 E831 ; MOS46 0216 E84E ^1F MOS46 0160 E831 20 71 F1 JSR SVOP ;offer to paged ROMs (N.B. X=SVBYTE or X=SVWORD) MOS46 0216 E84E ^1F MOS46 0161 E834 D0 05 BNE BADOSC ;[unrecognised OS call] MOS46 0216 E84E ^1F MOS46 0162 E836 ; MOS46 0216 E84E ^1F MOS46 0163 E836 ; recognised OS call MOS46 0216 E84E ^1F MOS46 0164 E836 ; MOS46 0216 E84E ^1F MOS46 0165 E836 A6 F0 LDX BYTEX ;replace X (corrupted by SVOP) MOS46 0216 E84E ^1F MOS46 0166 E838 ; MOS46 0216 E84E ^1F MOS46 0167 E838 4C 21 E8 JMP OSRET MOS46 0216 E84E ^1F MOS46 0168 E83B MOS46 0216 E84E ^1F MOS46 0169 E83B MOS46 0216 E84E ^1F MOS46 0170 E83B BADOSC ;bad OS call MOS46 0216 E84E ^1F MOS46 0171 E83B 28 PLP ;restore interrupt status MOS46 0216 E84E ^1F MOS46 0172 E83C 68 PLA ;restore code to return with MOS46 0216 E84E ^1F MOS46 0173 E83D 2C 50 D9 BIT FFBYT ;indicate call not recognised MOS46 0216 E84E ^1F MOS46 0174 E840 60 RTS MOS46 0216 E84E ^1F MOS46 0175 E841 MOS46 0216 E84E ^1F MOS46 0176 E841 MOS46 0216 E84E ^1F MOS46 0177 E841 [ MOS125 = &FF MOS46 0216 E84E ^1F MOS46 0193 E841 ] MOS46 0216 E84E ^1F MOS46 0194 E841 MOS46 0216 E84E ^1F MOS46 0195 E841 MOS46 0216 E84E ^1F MOS46 0196 E841 WORD ;OSWORD call MOS46 0216 E84E ^1F MOS46 0197 E841 ; uses: MOS46 0216 E84E ^1F MOS46 0198 E841 ; WORDX, WORDY (may be shared by sei-routines) MOS46 0216 E84E ^1F MOS46 0199 E841 ; JMILO, JMIHI (may be shared by sei-routines) MOS46 0216 E84E ^1F MOS46 0200 E841 ; MOS46 0216 E84E ^1F MOS46 0201 E841 48 PHA MOS46 0216 E84E ^1F MOS46 0202 E842 08 PHP ;save interrupt state MOS46 0216 E84E ^1F MOS46 0203 E843 78 SEI ;**** DISABLE INTERRUPTS **** MOS46 0216 E84E ^1F MOS46 0204 E844 ; MOS46 0216 E84E ^1F MOS46 0205 E844 ; save A, X and Y MOS46 0216 E84E ^1F MOS46 0206 E844 ; MOS46 0216 E84E ^1F MOS46 0207 E844 85 EF STA WORDA MOS46 0216 E84E ^1F MOS46 0208 E846 86 F0 STX WORDX MOS46 0216 E84E ^1F MOS46 0209 E848 84 F1 STY WORDY MOS46 0216 E84E ^1F MOS46 0210 E84A ; MOS46 0216 E84E ^1F MOS46 0211 E84A A2 08 LDXIM SVWORD ;code used if indirection taken MOS46 0216 E84E ^1F MOS46 0212 E84C ; MOS46 0216 E84E ^1F MOS46 0213 E84C ; check for user OSWORD call MOS46 0216 E84E ^1F MOS46 0214 E84C ; MOS46 0216 E84E ^1F MOS46 0215 E84C C9 E0 CMPIM &E0 MOS46 0216 E84E ^1F MOS46 0216 E84E B0 9F BCS WORDU ;[user OSWORD call - route thru USRVEC, C=1] MOS46 0237 E857 ^1F MOS46 0217 E850 ; MOS46 0237 E857 ^1F MOS46 0218 E850 ; not a user OSWORD call MOS46 0237 E857 ^1F MOS46 0219 E850 ; MOS46 0237 E857 ^1F MOS46 0220 E850 ; check for legal code MOS46 0237 E857 ^1F MOS46 0221 E850 ; MOS46 0237 E857 ^1F MOS46 0222 E850 C9 0E CMPIM WORDN MOS46 0237 E857 ^1F MOS46 0223 E852 B0 D9 BCS WORD0 ;[unrecognised code] MOS46 0237 E857 ^1F MOS46 0224 E854 ; C=0 MOS46 0237 E857 ^1F MOS46 0225 E854 ; MOS46 0237 E857 ^1F MOS46 0226 E854 ; recognised OSWORD call MOS46 0237 E857 ^1F MOS46 0227 E854 ; construct address of specific OSWORD routine MOS46 0237 E857 ^1F MOS46 0228 E854 ; MOS46 0237 E857 ^1F MOS46 0229 E854 ; C=0 MOS46 0237 E857 ^1F MOS46 0230 E854 69 44 ADCIM WORDT-BYTET:SHR: 1 MOS46 0237 E857 ^1F MOS46 0231 E856 ; C=0 MOS46 0237 E857 ^1F MOS46 0232 E856 ; MOS46 0237 E857 ^1F MOS46 0233 E856 ; enter specific OSWORD routine MOS46 0237 E857 ^1F MOS46 0234 E856 ; MOS46 0237 E857 ^1F MOS46 0235 E856 0A ASLA ;prepare for Y := 2*code MOS46 0237 E857 ^1F MOS46 0236 E857 ; C=0 MOS46 0237 E857 ^1F MOS46 0237 E857 90 9F BCC BYTE2 ;[ALWAYS jump, C=0 => OSWORD call] MOS46 0316 E864 ^49 MOS46 0238 E859 MOS46 0316 E864 ^49 MOS46 0239 E859 [ MOS125 = &FF MOS46 0316 E864 ^49 MOS46 0277 E859 ] MOS46 0316 E864 ^49 MOS46 0278 E859 MOS46 0316 E864 ^49 MOS46 0279 E859 NOTE ;add note to note buffer MOS46 0316 E864 ^49 MOS46 0280 E859 ; ********************* MOS46 0316 E864 ^49 MOS46 0281 E859 ; MAY ENABLE INTERRUPTS MOS46 0316 E864 ^49 MOS46 0282 E859 ; ********************* MOS46 0316 E864 ^49 MOS46 0283 E859 ; XY -> 8 bytes of info MOS46 0316 E864 ^49 MOS46 0284 E859 ; C=1 MOS46 0316 E864 ^49 MOS46 0285 E859 ; X=SVWORD MOS46 0316 E864 ^49 MOS46 0286 E859 ; Y=0 MOS46 0316 E864 ^49 MOS46 0287 E859 ; MOS46 0316 E864 ^49 MOS46 0288 E859 [ NOSP = &00 MOS46 0316 E864 ^49 MOS46 0300 E859 | MOS46 0316 E864 ^49 MOS46 0301 E859 [ $Tutu MOS46 0316 E864 ^49 MOS46 0306 E859 | MOS46 0316 E864 ^49 MOS46 0307 E859 C8 INY MOS46 0316 E864 ^49 MOS46 0308 E85A B1 F0 LDAIY WORDX ;A := command type indicator (hi-byte of 1st argument) MOS46 0316 E864 ^49 MOS46 0309 E85C C9 FF CMPIM &FF MOS46 0316 E864 ^49 MOS46 0310 E85E ] MOS46 0316 E864 ^49 MOS46 0311 E85E F0 59 BEQ SPEECH ;[speech command] MOS46 0311 E85E v26 MOS46 0312 E860 C9 20 CMPIM &20 MOS46 0311 E85E v26 MOS46 0313 E862 ] MOS46 0311 E85E v26 MOS46 0314 E862 MOS46 0311 E85E v26 MOS46 0315 E862 A2 08 LDXIM SVWORD ;in case EXTSND called MOS46 0311 E85E v26 MOS46 0316 E864 B0 C9 BCS EXTSND ;[route command to paged ROM] MOS46 0311 E85E v26 MOS46 0317 E866 ; MOS46 0311 E85E v26 MOS46 0318 E866 ; sound command MOS46 0311 E85E v26 MOS46 0319 E866 ; MOS46 0311 E85E v26 MOS46 0320 E866 88 DEY ;Y := 0 MOS46 0311 E85E v26 MOS46 0321 E867 20 F1 E8 JSR NOTEX ;C => flush, A = channel, Y := 1 MOS46 0311 E85E v26 MOS46 0322 E86A 09 04 ORAIM &04 ;********** N.B. assumes BSND1=4 MOS46 0311 E85E v26 MOS46 0323 E86C AA TAX ;X := (internal) sound bufferid MOS46 MOS46 MOS46 MOS46 Acorn macro assembler Page 98 MOS46 MOS46 OSWORD routines MOS46 MOS46 0311 E85E v26 MOS46 0324 E86D 90 05 BCC NOTENF ;[do not flush channel] MOS46 0311 E85E v26 MOS46 0325 E86F ; C=1 MOS46 0311 E85E v26 MOS46 0326 E86F ; flush channel MOS46 0311 E85E v26 MOS46 0327 E86F ; MOS46 0311 E85E v26 MOS46 0328 E86F ; C=1 MOS46 0311 E85E v26 MOS46 0329 E86F 20 B3 E1 JSR PURGEX ;purge buffer MOS46 0311 E85E v26 MOS46 0330 E872 A0 01 LDYIM &01 ;restore Y MOS46 0311 E85E v26 MOS46 0331 E874 ; MOS46 0311 E85E v26 MOS46 0332 E874 NOTENF MOS46 0311 E85E v26 MOS46 0333 E874 20 F1 E8 JSR NOTEX ;C => release continue, A = chordcount-1 MOS46 0311 E85E v26 MOS46 0334 E877 85 FA STA NOTEWK MOS46 0311 E85E v26 MOS46 0335 E879 ; MOS46 0311 E85E v26 MOS46 0336 E879 08 PHP ;needed in order to share code with BELL MOS46 0311 E85E v26 MOS46 0337 E87A A0 06 LDYIM &06 ;A := duration-lo MOS46 0311 E85E v26 MOS46 0338 E87C B1 F0 LDAIY WORDX MOS46 0311 E85E v26 MOS46 0339 E87E 48 PHA MOS46 0311 E85E v26 MOS46 0340 E87F ; MOS46 0311 E85E v26 MOS46 0341 E87F A0 04 LDYIM &04 ;A := note-lo MOS46 0311 E85E v26 MOS46 0342 E881 B1 F0 LDAIY WORDX MOS46 0311 E85E v26 MOS46 0343 E883 48 PHA MOS46 0311 E85E v26 MOS46 0344 E884 ; MOS46 0311 E85E v26 MOS46 0345 E884 ; C => release continue MOS46 0311 E85E v26 MOS46 0346 E884 ; MOS46 0311 E85E v26 MOS46 0347 E884 A0 02 LDYIM &02 MOS46 0311 E85E v26 MOS46 0348 E886 B1 F0 LDAIY WORDX ;A = envelope-lo MOS46 0311 E85E v26 MOS46 0349 E888 2A ROLA ;rotate in release continue bit MOS46 0311 E85E v26 MOS46 0350 E889 38 SEC MOS46 0311 E85E v26 MOS46 0351 E88A E9 02 SBCIM &02 ;envelope numbers start at 1 MOS46 0311 E85E v26 MOS46 0352 E88C 0A ASLA MOS46 0311 E85E v26 MOS46 0353 E88D 0A ASLA ;rotate in 2 zero bits MOS46 0311 E85E v26 MOS46 0354 E88E 05 FA ORA NOTEWK ;A := AEEE ERHH MOS46 0311 E85E v26 MOS46 0355 E890 ; MOS46 0311 E85E v26 MOS46 0356 E890 ; insert byte into buffer, waiting if necessary MOS46 0311 E85E v26 MOS46 0357 E890 ; MOS46 0311 E85E v26 MOS46 0358 E890 20 70 E2 JSR WRITE MOS46 0311 E85E v26 MOS46 0359 E893 90 1E BCC NOTE2 ;[byte inserted] MOS46 0311 E85E v26 MOS46 0360 E895 ; MOS46 0311 E85E v26 MOS46 0361 E895 SPESC ;ESCAPE detected MOS46 0311 E85E v26 MOS46 0362 E895 68 PLA MOS46 0311 E85E v26 MOS46 0363 E896 68 PLA MOS46 0311 E85E v26 MOS46 0364 E897 28 PLP MOS46 0311 E85E v26 MOS46 0365 E898 ; MOS46 0311 E85E v26 MOS46 0366 E898 VDUST ;FX call to return VDU status MOS46 0311 E85E v26 MOS46 0367 E898 A6 D0 LDX STATS MOS46 0311 E85E v26 MOS46 0368 E89A ; MOS46 0311 E85E v26 MOS46 0369 E89A 60 RTS MOS46 0311 E85E v26 MOS46 0370 E89B MOS46 0311 E85E v26 MOS46 0371 E89B MOS46 0311 E85E v26 MOS46 0372 E89B ; MOS46 0311 E85E v26 MOS46 0373 E89B ;; ===== MOS46 0311 E85E v26 MOS46 0374 E89B ; BELL MOS46 0311 E85E v26 MOS46 0375 E89B ; ===== MOS46 0311 E85E v26 MOS46 0376 E89B ; MOS46 0311 E85E v26 MOS46 0377 E89B ; Add BELL to sound queue MOS46 0311 E85E v26 MOS46 0378 E89B ; MOS46 0311 E85E v26 MOS46 0379 E89B ; ENTRY:- No conditions MOS46 0311 E85E v26 MOS46 0380 E89B ; MOS46 0311 E85E v26 MOS46 0381 E89B ; EXIT:- A,X,Y Corrupted MOS46 0311 E85E v26 MOS46 0382 E89B ; Flags preserved MOS46 0311 E85E v26 MOS46 0383 E89B ; MOS46 0311 E85E v26 MOS46 0384 E89B BELL MOS46 0311 E85E v26 MOS46 0385 E89B 08 PHP MOS46 0311 E85E v26 MOS46 0386 E89C 78 SEI MOS46 0311 E85E v26 MOS46 0387 E89D ; MOS46 0311 E85E v26 MOS46 0388 E89D ; try to add bell to sound channel queue MOS46 0311 E85E v26 MOS46 0389 E89D ; MOS46 0311 E85E v26 MOS46 0390 E89D AD 63 02 LDA BELLC MOS46 0311 E85E v26 MOS46 0391 E8A0 29 07 ANDIM &07 MOS46 0311 E85E v26 MOS46 0392 E8A2 09 04 ORAIM &04 MOS46 0311 E85E v26 MOS46 0393 E8A4 AA TAX ;force valid sound channel MOS46 0311 E85E v26 MOS46 0394 E8A5 ; MOS46 0311 E85E v26 MOS46 0395 E8A5 ; insert envelope/chord info MOS46 0311 E85E v26 MOS46 0396 E8A5 ; MOS46 0311 E85E v26 MOS46 0397 E8A5 AD 64 02 LDA BELLI MOS46 0311 E85E v26 MOS46 0398 E8A8 20 28 E5 JSR INSRT MOS46 0311 E85E v26 MOS46 0399 E8AB ; MOS46 0311 E85E v26 MOS46 0400 E8AB ; N.B. ignore return code MOS46 0311 E85E v26 MOS46 0401 E8AB ; C=0 => inserted, C=1 => not inserted MOS46 0311 E85E v26 MOS46 0402 E8AB ; if first INSRT failed then so will the following INSRTs MOS46 0311 E85E v26 MOS46 0403 E8AB ; set to insert duration MOS46 0311 E85E v26 MOS46 0404 E8AB ; MOS46 0311 E85E v26 MOS46 0405 E8AB AD 66 02 LDA BELLD MOS46 0311 E85E v26 MOS46 0406 E8AE 48 PHA MOS46 0311 E85E v26 MOS46 0407 E8AF ; MOS46 0311 E85E v26 MOS46 0408 E8AF ; set to insert note MOS46 0311 E85E v26 MOS46 0409 E8AF ; MOS46 0311 E85E v26 MOS46 0410 E8AF AD 65 02 LDA BELLN MOS46 0311 E85E v26 MOS46 0411 E8B2 48 PHA MOS46 0311 E85E v26 MOS46 0412 E8B3 ; MOS46 0311 E85E v26 MOS46 0413 E8B3 NOTE2 ;buffer slot available MOS46 0311 E85E v26 MOS46 0414 E8B3 ; C=0 => inserted, C=1 => not inserted MOS46 0311 E85E v26 MOS46 0415 E8B3 ; MOS46 0311 E85E v26 MOS46 0416 E8B3 38 SEC MOS46 0311 E85E v26 MOS46 0417 E8B4 7E 00 08 RORAX MACTIV-BSND1 MOS46 0311 E85E v26 MOS46 0418 E8B7 [ NOSP = &00 MOS46 0311 E85E v26 MOS46 0420 E8B7 | MOS46 0311 E85E v26 MOS46 0421 E8B7 30 17 BMI NOTE3 ;[ALWAYS JUMP] MOS46 0311 E85E v26 MOS46 0422 E8B9 ; MOS46 0311 E85E v26 MOS46 0423 E8B9 SPEECH ;SOUND -1,x,y,z command MOS46 0311 E85E v26 MOS46 0424 E8B9 ; Y=1 MOS46 0311 E85E v26 MOS46 0425 E8B9 08 PHP ;needed to share code with BELL MOS46 0438 E8CB ^48 MOS46 0426 E8BA C8 INY ;Y := $02 MOS46 0438 E8CB ^48 MOS46 0427 E8BB B1 F0 LDAIY WORDX MOS46 0438 E8CB ^48 MOS46 0428 E8BD 48 PHA MOS46 0438 E8CB ^48 MOS46 0429 E8BE ; MOS46 0438 E8CB ^48 MOS46 0430 E8BE C8 INY ;Y := $03 MOS46 0438 E8CB ^48 MOS46 0431 E8BF B1 F0 LDAIY WORDX MOS46 0438 E8CB ^48 MOS46 0432 E8C1 48 PHA MOS46 0438 E8CB ^48 MOS46 0433 E8C2 ; MOS46 0438 E8CB ^48 MOS46 0434 E8C2 A0 00 LDYIM ZERO MOS46 0438 E8CB ^48 MOS46 0435 E8C4 B1 F0 LDAIY WORDX MOS46 0438 E8CB ^48 MOS46 0436 E8C6 A2 08 LDXIM BSPCH MOS46 0438 E8CB ^48 MOS46 0437 E8C8 20 70 E2 JSR WRITE ;insert first byte into buffer MOS46 0438 E8CB ^48 MOS46 0438 E8CB B0 C8 BCS SPESC ;[escape detected] MOS46 0421 E8B7 v68 MOS46 0439 E8CD ; MOS46 0421 E8B7 v68 MOS46 0440 E8CD ; C=0 MOS46 0421 E8B7 v68 MOS46 0441 E8CD ; MOS46 0421 E8B7 v68 MOS46 0442 E8CD 6E D7 02 ROR SPSTAT ;indicate speech buffer non-empty MOS46 0421 E8B7 v68 MOS46 0443 E8D0 ] MOS46 0421 E8B7 v68 MOS46 0444 E8D0 ; MOS46 0421 E8B7 v68 MOS46 0445 E8D0 NOTE3 ;add note and duration (ignored if first byte not inserted) MOS46 MOS46 MOS46 MOS46 Acorn macro assembler Page 99 MOS46 MOS46 OSWORD routines MOS46 MOS46 0421 E8B7 v68 MOS46 0446 E8D0 68 PLA -- MOS46 0447 E8D1 20 28 E5 JSR INSRT ;add note data to queue -- MOS46 0448 E8D4 68 PLA -- MOS46 0449 E8D5 20 28 E5 JSR INSRT ;add duration info to queue -- MOS46 0450 E8D8 28 PLP -- MOS46 0451 E8D9 60 RTS -- MOS46 0452 E8DA -- MOS46 0453 E8DA -- MOS46 0454 E8DA NVLP ;define envelope shape -- MOS46 0455 E8DA ; A := envelope number -- MOS46 0456 E8DA ; C=1 -- MOS46 0457 E8DA ; -- MOS46 0458 E8DA [ MOS125 = &FF -- MOS46 0470 E8DA | -- MOS46 0471 E8DA ; -- MOS46 0472 E8DA ; envelope number forced into range 0 to 15 (1->0, 2->1 ... 16->15) -- MOS46 0473 E8DA ; (0 forced to 255, which will have the same effect as 15) -- MOS46 0474 E8DA ; -- MOS46 0475 E8DA 0A ASLA -- MOS46 0476 E8DB 0A ASLA -- MOS46 0477 E8DC 0A ASLA -- MOS46 0478 E8DD 0A ASLA ;envelope number := envelope number * 16 -- MOS46 0479 E8DE AA TAX ;N.B. ENVSIZ must be 16! -- MOS46 0480 E8DF ] -- MOS46 0481 E8DF ; -- MOS46 0482 E8DF ; copy envelope definition to envelope slot -- MOS46 0483 E8DF ; padding to 16 bytes with zeroes -- MOS46 0484 E8DF ; -- MOS46 0485 E8DF A9 00 LDAIM ZERO ;padding value -- MOS46 0486 E8E1 A0 10 LDYIM ENVSIZ -- MOS46 0487 E8E3 ; -- MOS46 0488 E8E3 NVLP1 -- MOS46 0489 E8E3 C0 0E CPYIM ENVSIZ-&02 MOS46 0502 E8EE ^73 MOS46 0490 E8E5 B0 02 BCS NVLP2 ;[still padding] MOS46 0502 E8EE ^73 MOS46 0491 E8E7 ; MOS46 0502 E8EE ^73 MOS46 0492 E8E7 B1 F0 LDAIY WORDX MOS46 0502 E8EE ^73 MOS46 0493 E8E9 NVLP2 MOS46 0502 E8EE ^73 MOS46 0494 E8E9 [ MOS125 = &FF MOS46 0502 E8EE ^73 MOS46 0497 E8E9 | MOS46 0502 E8EE ^73 MOS46 0498 E8E9 CA DEX MOS46 0502 E8EE ^73 MOS46 0499 E8EA 9D C0 08 STAAX ENVEL MOS46 0502 E8EE ^73 MOS46 0500 E8ED ] MOS46 0502 E8EE ^73 MOS46 0501 E8ED 88 DEY MOS46 0502 E8EE ^73 MOS46 0502 E8EE D0 F3 BNE NVLP1 -- MOS46 0503 E8F0 ; -- MOS46 0504 E8F0 60 RTS -- MOS46 0505 E8F1 -- MOS46 0506 E8F1 NOTEX ;extract byte info from offset Y of vector -- MOS46 0507 E8F1 B1 F0 LDAIY WORDX -- MOS46 0508 E8F3 C9 10 CMPIM &10 ;C => flag (flush or release continue) -- MOS46 0509 E8F5 29 03 ANDIM &03 -- MOS46 0510 E8F7 C8 INY ;step Y to next slot -- MOS46 0511 E8F8 60 RTS -- MOS46 0512 E8F9 -- MOS46 0513 E8F9 RITM ;read interval time -- MOS46 0514 E8F9 A2 0F LDXIM STPW+&5-TIME -- MOS46 0515 E8FB D0 03 BNE RTM ;[ALWAYS jump] MOS46 0515 E8FB v7C MOS46 0516 E8FD ; NEVER fall thru MOS46 0515 E8FB v7C MOS46 0517 E8FD RATM ;read absolute time MOS46 0515 E8FB v7C MOS46 0518 E8FD AE 83 02 LDX TIMESW MOS46 0515 E8FB v7C MOS46 0519 E900 RTM MOS46 0515 E8FB v7C MOS46 0520 E900 A0 04 LDYIM &04 -- MOS46 0521 E902 RTM1 -- MOS46 0522 E902 BD 8D 02 LDAAX TIME -&05 MOS46 0526 E909 ^77 MOS46 0523 E905 91 F0 STAIY WORDX MOS46 0526 E909 ^77 MOS46 0524 E907 E8 INX MOS46 0526 E909 ^77 MOS46 0525 E908 88 DEY MOS46 0526 E909 ^77 MOS46 0526 E909 10 F7 BPL RTM1 -- MOS46 0527 E90B WTM0 -- MOS46 0528 E90B 60 RTS MOS46 0558 E921 ^68 MOS46 0529 E90C MOS46 0558 E921 ^68 MOS46 0530 E90C [ MOS125 = &FF MOS46 0558 E921 ^68 MOS46 0539 E90C | MOS46 0558 E921 ^68 MOS46 0540 E90C WATM ;write absolute time MOS46 0558 E921 ^68 MOS46 0541 E90C AC 83 02 LDY TIMESW MOS46 0558 E921 ^68 MOS46 0542 E90F 18 CLC ;indicate WATM entry MOS46 0558 E921 ^68 MOS46 0543 E910 WITM ;write interval time, C=1, Y=0 MOS46 0558 E921 ^68 MOS46 0544 E910 98 TYA MOS46 0558 E921 ^68 MOS46 0545 E911 49 0F EORIM &0F ;assumes STPW-TIME = &A MOS46 0558 E921 ^68 MOS46 0546 E913 ] MOS46 0558 E921 ^68 MOS46 0547 E913 WTM MOS46 0558 E921 ^68 MOS46 0548 E913 48 PHA ;save TIMESW for WATM entry MOS46 0558 E921 ^68 MOS46 0549 E914 AA TAX MOS46 0558 E921 ^68 MOS46 0550 E915 A0 04 LDYIM &04 MOS46 0558 E921 ^68 MOS46 0551 E917 WTM1 MOS46 0558 E921 ^68 MOS46 0552 E917 B1 F0 LDAIY WORDX MOS46 0558 E921 ^68 MOS46 0553 E919 9D 8D 02 STAAX TIME -&05 MOS46 0558 E921 ^68 MOS46 0554 E91C E8 INX MOS46 0558 E921 ^68 MOS46 0555 E91D 88 DEY MOS46 0558 E921 ^68 MOS46 0556 E91E 10 F7 BPL WTM1 MOS46 0558 E921 ^68 MOS46 0557 E920 68 PLA MOS46 0558 E921 ^68 MOS46 0558 E921 B0 E8 BCS WTM0 ;[not WATM entry, do not reset TIMESW] -- MOS46 0559 E923 ; WATM entry, reset TIMESW -- MOS46 0560 E923 8D 83 02 STA TIMESW -- MOS46 0561 E926 60 RTS -- MOS46 0562 E927 -- MOS46 0563 E927 RDLN ;read input buffer -- MOS46 0564 E927 ; ****************** -- MOS46 0565 E927 ; ENABLES INTERRUPTS -- MOS46 0566 E927 ; ****************** -- MOS46 0567 E927 ;**************** -- MOS46 0568 E927 ;variables: -- MOS46 0569 E927 ;zero page: RDLNX, RDLNY (contiguous) -- MOS46 0570 E927 ;other page: RDLNN, RDLNLC, RDLNHC (contiguous) -- MOS46 0571 E927 ;**************** -- MOS46 0572 E927 ;Called with Y and X the high and low addresses of the information -- MOS46 0573 E927 ;describing what is to be done. The bytes in order are: -- MOS46 0574 E927 ;lsb address of buffer -- MOS46 0575 E927 ;msb address of buffer -- MOS46 0576 E927 ;maximum length allowed -- MOS46 0577 E927 ;minimum character value to be stored in buffer -- MOS46 0578 E927 ;maximum character value to be stored in buffer -- MOS46 0579 E927 ;Return when escape is pressed or seen with CARRY SET -- MOS46 0580 E927 ;Return after CR (which is always stored) with CARRY CLEAR -- MOS46 0581 E927 ;Always returns with Y the number of characters in the buffer -- MOS46 0582 E927 ;DEL,ESC and NAK are always processed -- MOS46 0583 E927 ;**** NOTE **** -- MOS46 0584 E927 ; if the 'other page' variables are put into page zero -- MOS46 0585 E927 ; this routine can be made ~10 bytes shorter. -- MOS46 0586 E927 ; however, an extra pointer variable in page zero would -- MOS46 0587 E927 ; then be required. MOS46 MOS46 MOS46 MOS46 Acorn macro assembler Page 100 MOS46 MOS46 OSWORD routines MOS46 -- MOS46 0588 E927 ; this routine enables interrupts -- MOS46 0589 E927 ; ********** -- MOS46 0590 E927 ; copy 'other page' values -- MOS46 0591 E927 -- MOS46 0592 E927 A0 04 LDYIM &04 -- MOS46 0593 E929 BUFFPR -- MOS46 0594 E929 B1 F0 LDAIY WORDX MOS46 0598 E931 ^76 MOS46 0595 E92B 99 B1 02 STAAY RDLNN -&02 ;N.B. offset of -02 MOS46 0598 E931 ^76 MOS46 0596 E92E 88 DEY MOS46 0598 E931 ^76 MOS46 0597 E92F C0 02 CPYIM &02 MOS46 0598 E931 ^76 MOS46 0598 E931 B0 F6 BCS BUFFPR ;[more arguments to copy] -- MOS46 0599 E933 ; -- MOS46 0600 E933 ; C=0, Y=1 -- MOS46 0601 E933 ; copy buffer pointer -- MOS46 0602 E933 ; -- MOS46 0603 E933 B1 F0 LDAIY WORDX ;hi-byte -- MOS46 0604 E935 85 E9 STA RDLNBF +&01 -- MOS46 0605 E937 88 DEY ;Y := 0 -- MOS46 0606 E938 8C 69 02 STY LINES ;reset page mode page origin -- MOS46 0607 E93B B1 F0 LDAIY WORDX ;lo-byte -- MOS46 0608 E93D 85 E8 STA RDLNBF +&00 -- MOS46 0609 E93F ; -- MOS46 0610 E93F ; C=0, Y=0 -- MOS46 0611 E93F ; -- MOS46 0612 E93F 58 CLI ;**** ENABLE INTERRUPTS **** -- MOS46 0613 E940 90 1F BCC BUFFIN ;[ALWAYS JUMP] MOS46 0613 E940 v60 MOS46 0614 E942 ; MOS46 0613 E940 v60 MOS46 0615 E942 ; NEVER fall thru MOS46 0613 E940 v60 MOS46 0616 E942 MOS46 0613 E940 v60 MOS46 0617 E942 MOS46 0613 E940 v60 MOS46 0618 E942 [ MOS125 = &FF MOS46 0613 E940 v60 MOS46 0622 E942 | MOS46 0613 E940 v60 MOS46 0623 E942 A9 07 BUFEXH LDAIM BEL ;reflect bell to indicate error MOS46 0613 E940 v60 MOS46 0624 E944 D0 18 BNE BUFIGN ;ALWAYS jump MOS46 0613 E940 v60 MOS46 0625 E946 MOS46 0613 E940 v60 MOS46 0626 E946 BUFNXB ;check for ESC explicitly in case machine in non ESC mode MOS46 0613 E940 v60 MOS46 0627 E946 ;CMPIM ESC MOS46 0613 E940 v60 MOS46 0628 E946 ;BEQ BUFESC ;[ESC, N.B. C = 1] MOS46 0613 E940 v60 MOS46 0629 E946 ; not DEL, NAK or ESC MOS46 0613 E940 v60 MOS46 0630 E946 91 E8 STAIY RDLNBF ;store character in buffer MOS46 0702 E97A ^4A MOS46 0631 E948 C9 0D CMPIM MCR MOS46 0702 E97A ^4A MOS46 0632 E94A F0 3F BEQ BUFEND ;[CR detected, exit indicating CR received] MOS46 0632 E94A v40 MOS46 0633 E94C CC B3 02 CPY RDLNN MOS46 0632 E94A v40 MOS46 0634 E94F B0 F1 BCS BUFEXH ;[buffer exhausted, do not echo character] MOS46 0632 E94A v40 MOS46 0635 E951 ; MOS46 0632 E94A v40 MOS46 0636 E951 ; buffer not exhausted MOS46 0632 E94A v40 MOS46 0637 E951 ; MOS46 0632 E94A v40 MOS46 0638 E951 CD B4 02 CMP RDLNLC MOS46 0632 E94A v40 MOS46 0639 E954 90 08 BCC BUFIGN ;[character < lo-character] MOS46 0632 E94A v40 MOS46 0640 E956 CD B5 02 CMP RDLNHC MOS46 0632 E94A v40 MOS46 0641 E959 90 02 BCC BUFECH ;[character < hi-character, so accept] MOS46 0632 E94A v40 MOS46 0642 E95B D0 01 BNE BUFIGN ;[character > hi-character, so ignore] MOS46 0632 E94A v40 MOS46 0643 E95D C8 BUFECH INY ;increment count of characters in buffer MOS46 0632 E94A v40 MOS46 0644 E95E BUFIGN MOS46 0632 E94A v40 MOS46 0645 E95E ] MOS46 0632 E94A v40 MOS46 0646 E95E ; echo character MOS46 0632 E94A v40 MOS46 0647 E95E BFWRCH MOS46 0632 E94A v40 MOS46 0648 E95E 20 EE FF JSR OSWRCH MOS46 0632 E94A v40 MOS46 0649 E961 ; MOS46 0632 E94A v40 MOS46 0650 E961 BUFFIN ;main loop MOS46 0632 E94A v40 MOS46 0651 E961 20 E0 FF JSR OSRDCH ;read a character MOS46 0632 E94A v40 MOS46 0652 E964 B0 2B BCS BUFESC ;[escape detected] MOS46 0632 E94A v40 MOS46 0653 E966 AA TAX MOS46 0632 E94A v40 MOS46 0654 E967 AD 7C 02 LDA WRCHSW MOS46 0632 E94A v40 MOS46 0655 E96A 6A RORA MOS46 0632 E94A v40 MOS46 0656 E96B 6A RORA MOS46 0632 E94A v40 MOS46 0657 E96C 8A TXA MOS46 0632 E94A v40 MOS46 0658 E96D B0 05 BCS BUFNQ ;[output does not include VDU] MOS46 0632 E94A v40 MOS46 0659 E96F ; MOS46 0632 E94A v40 MOS46 0660 E96F ; output includes VDU MOS46 0632 E94A v40 MOS46 0661 E96F ; MOS46 0632 E94A v40 MOS46 0662 E96F ; MOS46 0632 E94A v40 MOS46 0663 E96F AE 6A 02 LDX QPOSN MOS46 0632 E94A v40 MOS46 0664 E972 D0 EA BNE BFWRCH ;[VDU queueing, reflect character] MOS46 0632 E94A v40 MOS46 0665 E974 ; MOS46 0632 E94A v40 MOS46 0666 E974 ; output does not include VDU MOS46 0632 E94A v40 MOS46 0667 E974 ; MOS46 0632 E94A v40 MOS46 0668 E974 BUFNQ ;VDU not queueing MOS46 0632 E94A v40 MOS46 0669 E974 [ MOS125 = &FF MOS46 0632 E94A v40 MOS46 0698 E974 | MOS46 0632 E94A v40 MOS46 0699 E974 C9 7F CMPIM MDEL MOS46 0632 E94A v40 MOS46 0700 E976 F0 05 BEQ BUFCNL ;[DEL received] MOS46 0632 E94A v40 MOS46 0701 E978 C9 15 CMPIM MNAK MOS46 0632 E94A v40 MOS46 0702 E97A D0 CA BNE BUFNXB ;[not DEL or NAK] MOS46 0632 E94A v40 MOS46 0703 E97C 18 CLC MOS46 0632 E94A v40 MOS46 0704 E97D BUFCNL ;output DEL once (CC) or for each character in the buffer MOS46 0632 E94A v40 MOS46 0705 E97D 98 TYA MOS46 0632 E94A v40 MOS46 0706 E97E F0 E1 BEQ BUFFIN ;[reached start of line] MOS46 0632 E94A v40 MOS46 0707 E980 88 DEY MOS46 0632 E94A v40 MOS46 0708 E981 A9 7F LDAIM MDEL MOS46 0632 E94A v40 MOS46 0709 E983 B0 D9 BCS BFWRCH ;[if DEL, reflect DEL and get next char] MOS46 0632 E94A v40 MOS46 0710 E985 20 EE FF JSR OSWRCH MOS46 0632 E94A v40 MOS46 0711 E988 18 CLC MOS46 0632 E94A v40 MOS46 0712 E989 90 F2 BCC BUFCNL ;[ALWAYS jump, more characters to delete] MOS46 0632 E94A v40 MOS46 0713 E98B ] MOS46 0632 E94A v40 MOS46 0714 E98B ; NEVER fall thru MOS46 0632 E94A v40 MOS46 0715 E98B ; MOS46 0632 E94A v40 MOS46 0716 E98B [ MOS125 = &FF MOS46 0632 E94A v40 MOS46 0736 E98B ] MOS46 0632 E94A v40 MOS46 0737 E98B MOS46 0632 E94A v40 MOS46 0738 E98B BUFEND ;read line successful MOS46 0632 E94A v40 MOS46 0739 E98B ; echo LF CR MOS46 0632 E94A v40 MOS46 0740 E98B 20 E7 FF JSR OSNEWL MOS46 0652 E964 v54 MOS46 0741 E98E 20 F5 E5 JSR JMINET ;N.B. assumes NTCR has value $0D MOS46 0652 E964 v54 MOS46 0742 E991 ; MOS46 0652 E964 v54 MOS46 0743 E991 BUFESC ;escape exit (C=1) MOS46 0652 E964 v54 MOS46 0744 E991 A5 FF LDA ESCFLG -- MOS46 0745 E993 2A ROLA ;C=0 => no escape, C=1 => escape -- MOS46 0746 E994 60 RTS -- MOS46 0747 E995 -- MOS46 0748 E995 -- MOS46 0749 E995 [ MOS125 = &7F -- MOS46 0750 E995 ;flash keyboard LEDs while waiting for printer buffer to purge -- MOS46 0751 E995 ;C=1 -- MOS46 0752 E995 SPFL -- MOS46 0753 E995 [ STARGO = &00 -- MOS46 0754 E995 48 PHA ;save FX call number MOS46 0775 E9A8 ^6B MOS46 0755 E996 8A TXA MOS46 0775 E9A8 ^6B MOS46 0756 E997 48 PHA ;save printer selection MOS46 0775 E9A8 ^6B MOS46 0757 E998 20 02 EA JSR MOSTST ;flash LEDs MOS46 0775 E9A8 ^6B MOS46 0758 E99B 68 PLA MOS46 MOS46 MOS46 MOS46 Acorn macro assembler Page 101 MOS46 MOS46 OSWORD routines MOS46 MOS46 0775 E9A8 ^6B MOS46 0759 E99C AA TAX ;restore printer selection MOS46 0775 E9A8 ^6B MOS46 0760 E99D 68 PLA ;restore FX call number MOS46 0775 E9A8 ^6B MOS46 0761 E99E 38 SEC ;restore C=1 MOS46 0775 E9A8 ^6B MOS46 0762 E99F ] MOS46 0775 E9A8 ^6B MOS46 0763 E99F ] MOS46 0775 E9A8 ^6B MOS46 0764 E99F MOS46 0775 E9A8 ^6B MOS46 0765 E99F SPRINT ;change printer selection (*FX 5) MOS46 0775 E9A8 ^6B MOS46 0766 E99F ; allow interrupts during wait, this means that: MOS46 0775 E9A8 ^6B MOS46 0767 E99F ; (a) the printer can purge AND/OR MOS46 0775 E9A8 ^6B MOS46 0768 E99F ; (b) escape can be detected MOS46 0775 E9A8 ^6B MOS46 0769 E99F 58 CLI MOS46 0775 E9A8 ^6B MOS46 0770 E9A0 78 SEI MOS46 0775 E9A8 ^6B MOS46 0771 E9A1 24 FF BIT ESCFLG MOS46 0775 E9A8 ^6B MOS46 0772 E9A3 30 30 BMI SPR0 ;[escape detected] MOS46 0772 E9A3 v4F MOS46 0773 E9A5 2C D2 02 BIT PFLAG MOS46 0772 E9A3 v4F MOS46 0774 E9A8 [ MOS125 = &7F MOS46 0772 E9A3 v4F MOS46 0775 E9A8 10 EB BPL SPFL ;printer busy, flash LEDs while purging MOS46 0772 E9A3 v4F MOS46 0776 E9AA | MOS46 0772 E9A3 v4F MOS46 0778 E9AA ] MOS46 0772 E9A3 v4F MOS46 0779 E9AA ; mention change of printer to print routines MOS46 0772 E9A3 v4F MOS46 0780 E9AA 20 40 E2 JSR UPTX ;N.B. Y corrupted MOS46 0772 E9A3 v4F MOS46 0781 E9AD ; interrupts may have corrupted BYTEX and BYTEY, so restore them MOS46 0772 E9A3 v4F MOS46 0782 E9AD A0 00 LDYIM ZERO ;Y altered by call to UPTX MOS46 0772 E9A3 v4F MOS46 0783 E9AF 84 F1 STY BYTEY MOS46 0772 E9A3 v4F MOS46 0784 E9B1 ; N.B. X reset at SETVX MOS46 0772 E9A3 v4F MOS46 0785 E9B1 ; N.B. A not altered since SPRINT MOS46 0772 E9A3 v4F MOS46 0786 E9B1 ; MOS46 0772 E9A3 v4F MOS46 0787 E9B1 V2B156 ;convert FX 1,5,6 to FX 241,245,246 MOS46 0772 E9A3 v4F MOS46 0788 E9B1 09 F0 ORAIM &F0 MOS46 0772 E9A3 v4F MOS46 0789 E9B3 D0 0E BNE SETVX ;[ALWAYS jump] MOS46 0772 E9A3 v4F MOS46 0790 E9B5 ; MOS46 0772 E9A3 v4F MOS46 0791 E9B5 ARRPT ;A = $0C, set auto-repeat repeat count MOS46 0772 E9A3 v4F MOS46 0792 E9B5 ; N.B. previous instruction was LDX MOS46 0772 E9A3 v4F MOS46 0793 E9B5 ; C=1 MOS46 0772 E9A3 v4F MOS46 0794 E9B5 D0 07 BNE ARRPT1 ;[X<>0 => do not set defaults] MOS46 0772 E9A3 v4F MOS46 0795 E9B7 ; set defaults MOS46 0772 E9A3 v4F MOS46 0796 E9B7 A2 32 LDXIM DAUTOD MOS46 0772 E9A3 v4F MOS46 0797 E9B9 8E 54 02 STX FARSET MOS46 0772 E9A3 v4F MOS46 0798 E9BC A2 08 LDXIM DAUTOP MOS46 0772 E9A3 v4F MOS46 0799 E9BE ARRPT1 ;A = $0C, C=1 MOS46 0772 E9A3 v4F MOS46 0800 E9BE ARDLY ;A = $0B, C=1, set auto-repeat delay count (0 => disable) MOS46 0772 E9A3 v4F MOS46 0801 E9BE 69 CF ADCIM FARSET-VBASE-&01-&0B- 233 ;$01 for carry, $0B for FX base MOS46 0772 E9A3 v4F MOS46 0802 E9C0 ; MOS46 0772 E9A3 v4F MOS46 0803 E9C0 V2B34 ;C=1 MOS46 0772 E9A3 v4F MOS46 0804 E9C0 18 CLC MOS46 0772 E9A3 v4F MOS46 0805 E9C1 69 E9 ADCIM 233 ;convert FX 3&4 to FX 236,237 MOS46 0772 E9A3 v4F MOS46 0806 E9C3 ; MOS46 0772 E9A3 v4F MOS46 0807 E9C3 SETVX MOS46 0772 E9A3 v4F MOS46 0808 E9C3 86 F0 STX BYTEX MOS46 0772 E9A3 v4F MOS46 0809 E9C5 ; MOS46 0772 E9A3 v4F MOS46 0810 E9C5 SETV ;set variable MOS46 0772 E9A3 v4F MOS46 0811 E9C5 ; A = FX code MOS46 0772 E9A3 v4F MOS46 0812 E9C5 ; X = value MOS46 0772 E9A3 v4F MOS46 0813 E9C5 ; Y = mask MOS46 0772 E9A3 v4F MOS46 0814 E9C5 A8 TAY ;Y := FX code MOS46 0772 E9A3 v4F MOS46 0815 E9C6 B9 90 01 LDAAY VBASE ;A := old value MOS46 0772 E9A3 v4F MOS46 0816 E9C9 AA TAX ;X := old value MOS46 0772 E9A3 v4F MOS46 0817 E9CA 25 F1 AND BYTEY ;apply mask MOS46 0772 E9A3 v4F MOS46 0818 E9CC 45 F0 EOR BYTEX ;apply value MOS46 0772 E9A3 v4F MOS46 0819 E9CE 99 90 01 STAAY VBASE ;store new value MOS46 0772 E9A3 v4F MOS46 0820 E9D1 B9 91 01 LDAAY VBASE+&01 MOS46 0772 E9A3 v4F MOS46 0821 E9D4 A8 TAY ;return following byte MOS46 0772 E9A3 v4F MOS46 0822 E9D5 SPR0 MOS46 0772 E9A3 v4F MOS46 0823 E9D5 60 RTS -- MOS46 0824 E9D6 -- MOS46 0825 E9D6 -- MOS46 0826 E9D6 BAUDS ;baud rate table (N.B. RS423 bit set cos of B9600 definition) -- MOS46 0827 E9D6 BUFTYP ;**** WARNING - SUBTLE WAY TO DETECT SOUND BUFFERS **** -- MOS46 0828 E9D6 ; (*) = sound buffer -- MOS46 0829 E9D6 0080 SOUNDB * &80 -- MOS46 0830 E9D6 64 = B9600 ;default baud rate / buffer 0 -- MOS46 0831 E9D7 7F = &7F ;75 111 111 / buffer 1 -- MOS46 0832 E9D8 5B = &5B ;150 011 011 / buffer 2 -- MOS46 0833 E9D9 6D = &6D ;300 101 101 / buffer 3 -- MOS46 0834 E9DA C9 = &49+SOUNDB ;1200 001 001 / buffer 4 (*) -- MOS46 0835 E9DB F6 = &76+SOUNDB ;2400 110 110 / buffer 5 (*) -- MOS46 0836 E9DC D2 = &52+SOUNDB ;4800 010 010 / buffer 6 (*) -- MOS46 0837 E9DD E4 = B9600+SOUNDB ;9600 100 100 / buffer 7 (*) -- MOS46 0838 E9DE 40 = &40 ;19200 000 000 / buffer 8 -- MOS46 0839 E9DF -- MOS46 0840 E9DF -- MOS46 0841 E9DF WFVS ;wait for vertical sync -- MOS46 0842 E9DF AD 40 02 LDA CYCLE -- MOS46 0843 E9E2 WFVS1 ;wait for CYCLE to alter -- MOS46 0844 E9E2 58 CLI ;must enable interrupts to allow CYCLE to operate MOS46 0849 E9E7 ^79 MOS46 0845 E9E3 ; this should give the user control immediately after VSYNC MOS46 0849 E9E7 ^79 MOS46 0846 E9E3 ; interrupt occurred MOS46 0849 E9E7 ^79 MOS46 0847 E9E3 78 SEI MOS46 0849 E9E7 ^79 MOS46 0848 E9E4 CD 40 02 CMP CYCLE MOS46 0849 E9E7 ^79 MOS46 0849 E9E7 F0 F9 BEQ WFVS1 ;[CYCLE not altered] -- MOS46 0850 E9E9 ; -- MOS46 0851 E9E9 ; share exit with read VDU variable -- MOS46 0852 E9E9 ; -- MOS46 0853 E9E9 VDUVAR ;read VDU variables -- MOS46 0854 E9E9 BC 01 03 LDYAX VARBLE+&01 -- MOS46 0855 E9EC BD 00 03 LDAAX VARBLE+&00 -- MOS46 0856 E9EF AA TAX -- MOS46 0857 E9F0 60 RTS -- MOS46 0858 E9F1 -- MOS46 0859 E9F1 -- MOS46 0860 E9F1 RSOFT ;reset soft keys -- MOS46 0861 E9F1 ; initialise soft key pointers -- MOS46 0862 E9F1 ; exits with X=0 (used by RESET) -- MOS46 0863 E9F1 ; ********** MUST NOT CORRUPT Y (SEE RESET) ********** -- MOS46 0864 E9F1 A9 10 LDAIM NSOFTK -- MOS46 0865 E9F3 8D 84 02 STA USKFLG ;signal soft keys inconsistent -- MOS46 0866 E9F6 A2 00 LDXIM ZERO -- MOS46 0867 E9F8 STTA ;set soft key buffer pointers, including the two end pointers -- MOS46 0868 E9F8 9D 00 0B STAAX SKPTR MOS46 0870 E9FC ^7A MOS46 0869 E9FB E8 INX MOS46 0870 E9FC ^7A MOS46 0870 E9FC D0 FA BNE STTA -- MOS46 0871 E9FE ; X=0 -- MOS46 0872 E9FE 8E 84 02 STX USKFLG ;USKFLG set to zero when soft keys consistent -- MOS46 0873 EA01 ; X=0 -- MOS46 0874 EA01 60 RTS -- MOS46 0875 EA02 -- MOS46 0876 EA02 -- MOS46 0877 EA02 LNK MOS48 -- MOS48 0001 EA02 -- MOS48 0002 EA02 ; MOS48 -- MOS48 0003 EA02 TTL MOS48 Miscellaneous routines MOS48 MOS48 MOS48 MOS48 Acorn macro assembler Page 102 MOS48 MOS48 Miscellaneous routines MOS48 -- MOS48 0004 EA02 OPT MOS48 MOS48 MOS48 MOS48 MOS48 Acorn macro assembler Page 103 MOS48 MOS48 Miscellaneous routines MOS48 -- MOS48 0005 EA02 ;(c) 1981 ACORN Computers Limited -- MOS48 0006 EA02 ;BBC Microcomputer Machine Operating System (MOS) -- MOS48 0007 EA02 -- MOS48 0008 EA02 ;Change record: -- MOS48 0009 EA02 ;01/03/82 PB GSINTC CR indication -- MOS48 0010 EA02 ;05/01/82 PB Change from printer claim to RS423 -- MOS48 0011 EA02 -- MOS48 0012 EA02 ;Author(s): -- MOS48 0013 EA02 ;PB Paul Bond -- MOS48 0014 EA02 -- MOS48 0015 EA02 -- MOS48 0016 EA02 TTL MOS48 External interface routines -- MOS48 0017 EA02 OPT OPNEWP MOS48 MOS48 MOS48 MOS48 Acorn macro assembler Page 104 MOS48 MOS48 External interface routines MOS48 -- MOS48 0018 EA02 -- MOS48 0019 EA02 -- MOS48 0020 EA02 ; external interfaces -- MOS48 0021 EA02 -- MOS48 0022 EA02 -- MOS48 0023 EA02 MOSTST -- MOS48 0024 EA02 ; C=0 => do not set LEDs, C=1 => set LEDs -- MOS48 0025 EA02 ; N.B. must not corrupt X (see WRCH print section) -- MOS48 0026 EA02 08 PHP ;push interrupt state -- MOS48 0027 EA03 78 SEI -- MOS48 0028 EA04 ; test for ESCAPE -- MOS48 0029 EA04 A9 40 LDAIM &40 -- MOS48 0030 EA06 20 13 EA JSR LEDSON ;conditionally set LEDs and test escape condition -- MOS48 0031 EA09 30 05 BMI SHIFTX ;[escape pending, simulate SHIFT without CTRL] MOS48 0031 EA09 v7A MOS48 0032 EA0B ; MOS48 0031 EA09 v7A MOS48 0033 EA0B 18 CLC ;indicate test ctrl/shift entry point MOS48 0031 EA09 v7A MOS48 0034 EA0C B8 CLV MOS48 0031 EA09 v7A MOS48 0035 EA0D 20 97 F0 JSR JMIKEY MOS48 0031 EA09 v7A MOS48 0036 EA10 ; MOS48 0031 EA09 v7A MOS48 0037 EA10 SHIFTX ;b7(A) => CTRL, b6(A) => SHIFT MOS48 0031 EA09 v7A MOS48 0038 EA10 28 PLP -- MOS48 0039 EA11 2A ROLA ;C => CTRL, MI => SHIFT -- MOS48 0040 EA12 60 RTS -- MOS48 0041 EA13 -- MOS48 0042 EA13 -- MOS48 0043 EA13 LEDSON ;turn LEDs on -- MOS48 0044 EA13 ; **************************************** -- MOS48 0045 EA13 ; MUST BE ENTERED WITH INTERRUPTS DISABLED -- MOS48 0046 EA13 ; **************************************** -- MOS48 0047 EA13 ; C=0 => do not turn LEDs on, C=1 => turn LEDs on -- MOS48 0048 EA13 ; returns status of BIT ESCFLG -- MOS48 0049 EA13 90 09 BCC LEDS0 ;[do not turn LEDs on] MOS48 0049 EA13 v76 MOS48 0050 EA15 ; set both LEDs (indicating a wait state) MOS48 0049 EA13 v76 MOS48 0051 EA15 A0 07 LDYIM &07 MOS48 0049 EA13 v76 MOS48 0052 EA17 8C 40 FE STY PBQ ;PBQ:=$07 MOS48 0049 EA13 v76 MOS48 0053 EA1A 88 DEY MOS48 0049 EA13 v76 MOS48 0054 EA1B 8C 40 FE STY PBQ ;PBQ:=$06 MOS48 0049 EA13 v76 MOS48 0055 EA1E LEDS0 ;set escape status MOS48 0049 EA13 v76 MOS48 0056 EA1E 24 FF BIT ESCFLG -- MOS48 0057 EA20 60 RTS -- MOS48 0058 EA21 -- MOS48 0059 EA21 CREG ;called by VDU module -- MOS48 0060 EA21 ; interrupts are disabled in order that a spurious -- MOS48 0061 EA21 ; ADC interrupt does not occur -- MOS48 0062 EA21 08 PHP ;save interrupt state -- MOS48 0063 EA22 78 SEI -- MOS48 0064 EA23 8D 40 FE STA PBQ ;set addressable latch value -- MOS48 0065 EA26 28 PLP ;restore interrupt state -- MOS48 0066 EA27 60 RTS -- MOS48 0067 EA28 -- MOS48 0068 EA28 -- MOS48 0069 EA28 VP0 ;program vidproc register 0 (FX entry) -- MOS48 0070 EA28 8A TXA -- MOS48 0071 EA29 MVPRC0 ;set video processor register 0 -- MOS48 0072 EA29 08 PHP -- MOS48 0073 EA2A 78 SEI ;**** DISABLE INTERRUPTS **** -- MOS48 0074 EA2B 8D 48 02 STA VPREGA ;update RAM image -- MOS48 0075 EA2E 8D 20 FE STA VPROC0 ;update ULA -- MOS48 0076 EA31 AD 53 02 LDA FLMRK -- MOS48 0077 EA34 8D 51 02 STA FLCNT ;reset flash count to mark value -- MOS48 0078 EA37 28 PLP -- MOS48 0079 EA38 60 RTS -- MOS48 0080 EA39 -- MOS48 0081 EA39 VP1 ;program vidproc register 1 (FX entry) -- MOS48 0082 EA39 8A TXA -- MOS48 0083 EA3A MVPRC1 ;set video processor register 1 -- MOS48 0084 EA3A 49 07 EORIM &07 ;adjust value accounting for ULA bug -- MOS48 0085 EA3C 08 PHP -- MOS48 0086 EA3D 78 SEI ;**** DISABLE INTERRUPTS **** -- MOS48 0087 EA3E 8D 49 02 STA VPREGB ;update RAM image -- MOS48 0088 EA41 8D 21 FE STA VPROC1 ;update ULA -- MOS48 0089 EA44 28 PLP -- MOS48 0090 EA45 60 RTS -- MOS48 0091 EA46 -- MOS48 0092 EA46 [ MOS125 = &FF -- MOS48 0093 EA46 | -- MOS48 0094 EA46 ; fetch/store byte from MMIO without dummy read cycle -- MOS48 0095 EA46 ; on entry A=OSBYTE call no. X=addr lo Y=byte C=1 -- MOS48 0096 EA46 69 65 CHEQUE ADCIM &65 ;C=1; A=&FC..FE -- MOS48 0097 EA48 38 SEC -- MOS48 0098 EA49 6A RORA ;C=0 read memory C=1 write -- MOS48 0099 EA4A ; fetch/store byte from I/O mem without dummy read -- MOS48 0100 EA4A ; on entry A=addr hi X=addr lo Y=byte C=0 read C=1 write -- MOS48 0101 EA4A BOUNCE -- MOS48 0102 EA4A 85 FB STA PEEKHI ;MSB address -- MOS48 0103 EA4C 86 FA STX PEEKLO ;LSB address -- MOS48 0104 EA4E A2 00 LDXIM &00 -- MOS48 0105 EA50 90 04 BCC BREAD MOS48 0105 EA50 v7B MOS48 0106 EA52 98 TYA MOS48 0105 EA50 v7B MOS48 0107 EA53 81 FA STAIX PEEKLO MOS48 0105 EA50 v7B MOS48 0108 EA55 60 RTS MOS48 0105 EA50 v7B MOS48 0109 EA56 BREAD MOS48 0105 EA50 v7B MOS48 0110 EA56 A1 FA LDAIX PEEKLO -- MOS48 0111 EA58 A8 TAY -- MOS48 0112 EA59 38 SEC ;return C=1 from OSBYTE/OSWORD -- MOS48 0113 EA5A 60 RTS -- MOS48 0114 EA5B -- MOS48 0115 EA5B MSGON ;used by CFS -- MOS48 0116 EA5B ;Return EQ if messages off and not doing catalogue -- MOS48 0117 EA5B ;or during EXEC/SPOOL (during which messages cannot occur -- MOS48 0118 EA5B ;since this implies writing chars while within RDCH or WRCH) -- MOS48 0119 EA5B -- MOS48 0120 EA5B A5 EB LDA ESSEMA -- MOS48 0121 EA5D 30 22 BMI MSGONY ;Inside RDCH/WRCH -> msgs OFF MOS48 0121 EA5D v5D MOS48 0122 EA5F MOS48 0121 EA5D v5D MOS48 0123 EA5F A9 08 LDAIM CATBIT MOS48 0121 EA5D v5D MOS48 0124 EA61 25 E2 AND CFSTAT MOS48 0121 EA5D v5D MOS48 0125 EA63 D0 04 BNE MSGONX ;Out with msgs set. MOS48 0121 EA5D v5D MOS48 0126 EA65 MOS48 0121 EA5D v5D MOS48 0127 EA65 A9 88 LDAIM MONBIT MOS48 0121 EA5D v5D MOS48 0128 EA67 25 BB AND USFLGS MOS48 0121 EA5D v5D MOS48 0129 EA69 60 MSGONX RTS MOS48 0121 EA5D v5D MOS48 0130 EA6A MOS48 0121 EA5D v5D MOS48 0131 EA6A PEEK ;read byte from I/O processor MOS48 0121 EA5D v5D MOS48 0132 EA6A 18 CLC MOS48 0121 EA5D v5D MOS48 0133 EA6B POKE ;write byte to I/O processor MOS48 0121 EA5D v5D MOS48 0134 EA6B AA TAX ;hold address lo-byte MOS48 0121 EA5D v5D MOS48 0135 EA6C C8 INY ;Y=1 MOS48 0121 EA5D v5D MOS48 0136 EA6D B1 F0 LDAIY WORDX ;get address hi-byte MOS48 0121 EA5D v5D MOS48 0137 EA6F 48 PHA ;address in X and 1,S MOS48 0121 EA5D v5D MOS48 0138 EA70 A0 04 LDYIM &04 ;point to byte to write MOS48 MOS48 MOS48 MOS48 Acorn macro assembler Page 105 MOS48 MOS48 External interface routines MOS48 MOS48 0121 EA5D v5D MOS48 0139 EA72 B1 F0 LDAIY WORDX MOS48 0121 EA5D v5D MOS48 0140 EA74 A8 TAY ;hold byte to write MOS48 0121 EA5D v5D MOS48 0141 EA75 68 PLA ;restore MSB of address MOS48 0121 EA5D v5D MOS48 0142 EA76 20 4A EA JSR BOUNCE ;write byte in Y/read byte into A MOS48 0121 EA5D v5D MOS48 0143 EA79 A0 04 LDYIM &04 MOS48 0121 EA5D v5D MOS48 0144 EA7B 91 F0 STAIY WORDX ;store byte read in OSWORD block MOS48 0121 EA5D v5D MOS48 0145 EA7D VER MOS48 0121 EA5D v5D MOS48 0146 EA7D F0 31 BEQ PVER MOS48 0146 EA7D v4E MOS48 0147 EA7F A2 01 LDXIM MCVER ;X=1 for OSBYTE 0,1 MOS version 1 MOS48 0146 EA7D v4E MOS48 0148 EA81 MSGONY ;used by MSGON below MOS48 0146 EA7D v4E MOS48 0149 EA81 A9 00 LDAIM ZERO MOS48 0146 EA7D v4E MOS48 0150 EA83 60 RTS MOS48 0146 EA7D v4E MOS48 0151 EA84 ] MOS48 0146 EA7D v4E MOS48 0152 EA84 MOS48 0146 EA7D v4E MOS48 0153 EA84 GSINTC ;intialise for string access (read item) MOS48 0146 EA7D v4E MOS48 0154 EA84 MOS48 0146 EA7D v4E MOS48 0155 EA84 18 CLC MOS48 0146 EA7D v4E MOS48 0156 EA85 GSINTS ;initialise for string access (read item/rest of line) MOS48 0146 EA7D v4E MOS48 0157 EA85 66 E4 ROR KQUOTE MOS48 0146 EA7D v4E MOS48 0158 EA87 20 AC E0 JSR SKIPSP ;A := LDAIY WORK MOS48 0146 EA7D v4E MOS48 0159 EA8A C8 INY ;skip possible opening quote MOS48 0146 EA7D v4E MOS48 0160 EA8B C9 22 CMPIM DQUOTE MOS48 0146 EA7D v4E MOS48 0161 EA8D F0 02 BEQ CLIOQ ;[opening quote, C=1] MOS48 0146 EA7D v4E MOS48 0162 EA8F ; no opening quote MOS48 0146 EA7D v4E MOS48 0163 EA8F 88 DEY ;adjust for erroneous skip MOS48 0146 EA7D v4E MOS48 0164 EA90 18 CLC MOS48 0146 EA7D v4E MOS48 0165 EA91 CLIOQ MOS48 0146 EA7D v4E MOS48 0166 EA91 66 E4 ROR KQUOTE ;PL => not a quoted string, MI => a quoted string MOS48 0146 EA7D v4E MOS48 0167 EA93 C9 0D CMPIM MCR ;return EQ => end-of-string, NEQ => not end-of-string MOS48 0146 EA7D v4E MOS48 0168 EA95 60 RTS MOS48 0146 EA7D v4E MOS48 0169 EA96 ; MOS48 0146 EA7D v4E MOS48 0170 EA96 GSREAD ;read character from string MOS48 0146 EA7D v4E MOS48 0171 EA96 MOS48 0146 EA7D v4E MOS48 0172 EA96 ; reset key mask (used in top bit option) MOS48 0146 EA7D v4E MOS48 0173 EA96 A9 00 LDAIM ZERO MOS48 0146 EA7D v4E MOS48 0174 EA98 GSRA ;used by |! option, entered with A=$80 MOS48 0146 EA7D v4E MOS48 0175 EA98 85 E5 STA KMASK ;KMASK := 0000 0000 (or KMASK := 1000 0000) MOS48 0248 EAEE ^28 MOS48 0176 EA9A B1 F2 LDAIY WORK ;A := next character MOS48 0248 EAEE ^28 MOS48 0177 EA9C C9 0D CMPIM MCR MOS48 0248 EAEE ^28 MOS48 0178 EA9E D0 1A BNE KEYNCR ;[not CR] MOS48 0248 EAEE ^28 MOS48 0179 EAA0 ; CR found, C=1 MOS48 0248 EAEE ^28 MOS48 0180 EAA0 ; check that string did not open with double quote MOS48 0248 EAEE ^28 MOS48 0181 EAA0 24 E4 BIT KQUOTE MOS48 0248 EAEE ^28 MOS48 0182 EAA2 [ MOS125 = &FF MOS48 0248 EAEE ^28 MOS48 0185 EAA2 | MOS48 0248 EAEE ^28 MOS48 0186 EAA2 10 2F BPL GSR1 ;[no unpaired double quote, return C=1 and EQ=>CR] MOS48 0248 EAEE ^28 MOS48 0187 EAA4 BADSTR MOS48 0248 EAEE ^28 MOS48 0188 EAA4 00 BRK ;report error 'Bad string' MOS48 0248 EAEE ^28 MOS48 0189 EAA5 FD = BADST MOS48 0248 EAEE ^28 MOS48 0190 EAA6 42 61 64 = "Bad string" ;BRK forms terminator MOS48 0248 EAEE ^28 MOS48 0191 EAB0 00 PVER BRK MOS48 0248 EAEE ^28 MOS48 0192 EAB1 F7 = FX0MSG MOS48 0248 EAEE ^28 MOS48 0193 EAB2 4F 53 20 = "OS " MOS48 0248 EAEE ^28 MOS48 0194 EAB5 31 = VERA MOS48 0248 EAEE ^28 MOS48 0195 EAB6 2E = "." MOS48 0248 EAEE ^28 MOS48 0196 EAB7 32 = VERB MOS48 0248 EAEE ^28 MOS48 0197 EAB8 36 = VERC MOS48 0248 EAEE ^28 MOS48 0198 EAB9 00 = ZERO MOS48 0248 EAEE ^28 MOS48 0199 EABA ] MOS48 0248 EAEE ^28 MOS48 0200 EABA KEYNCR ;character not CR MOS48 0248 EAEE ^28 MOS48 0201 EABA C9 20 CMPIM SPACE MOS48 0248 EAEE ^28 MOS48 0202 EABC 90 E6 BCC BADSTR ;[control character in string] MOS48 0248 EAEE ^28 MOS48 0203 EABE D0 06 BNE KEYNSP ;[not space] MOS48 0248 EAEE ^28 MOS48 0204 EAC0 ; space character MOS48 0248 EAEE ^28 MOS48 0205 EAC0 24 E4 BIT KQUOTE MOS48 0248 EAEE ^28 MOS48 0206 EAC2 30 3E BMI GSR0 ;[in quoted string] MOS48 0248 EAEE ^28 MOS48 0207 EAC4 50 0D BVC GSR1 ;[not in quoted string and not read line, so space is terminator] MOS48 0248 EAEE ^28 MOS48 0208 EAC6 ; fall thru, space will be returned as a valid character MOS48 0248 EAEE ^28 MOS48 0209 EAC6 KEYNSP MOS48 0248 EAEE ^28 MOS48 0210 EAC6 C9 22 CMPIM DQUOTE MOS48 0248 EAEE ^28 MOS48 0211 EAC8 D0 0E BNE KEYNDQ ;[not double quote] MOS48 0248 EAEE ^28 MOS48 0212 EACA ; double quote found MOS48 0248 EAEE ^28 MOS48 0213 EACA 24 E4 BIT KQUOTE MOS48 0248 EAEE ^28 MOS48 0214 EACC 10 34 BPL GSR0 ;[not in quoted string] MOS48 0248 EAEE ^28 MOS48 0215 EACE ; in quoted string MOS48 0248 EAEE ^28 MOS48 0216 EACE C8 INY MOS48 0248 EAEE ^28 MOS48 0217 EACF [ MOS125 = &FF MOS48 0248 EAEE ^28 MOS48 0220 EACF | MOS48 0248 EAEE ^28 MOS48 0221 EACF D1 F2 CMPIY WORK ;A = DQUOTE, compare with next character MOS48 0248 EAEE ^28 MOS48 0222 EAD1 ] MOS48 0248 EAEE ^28 MOS48 0223 EAD1 F0 2F BEQ GSR0 ;["" found in quoted string] MOS48 0248 EAEE ^28 MOS48 0224 EAD3 GSR1 ;closing quote of quoted string MOS48 0248 EAEE ^28 MOS48 0225 EAD3 20 AC E0 JSR SKIPSP ;skip spaces MOS48 0248 EAEE ^28 MOS48 0226 EAD6 38 SEC MOS48 0248 EAEE ^28 MOS48 0227 EAD7 60 RTS MOS48 0248 EAEE ^28 MOS48 0228 EAD8 MOS48 0248 EAEE ^28 MOS48 0229 EAD8 KEYNDQ ;character not CR or " MOS48 0248 EAEE ^28 MOS48 0230 EAD8 C9 7C CMPIM "|" ;check for pseudo-escape MOS48 0248 EAEE ^28 MOS48 0231 EADA D0 26 BNE GSR0 ;[valid string character] MOS48 0248 EAEE ^28 MOS48 0232 EADC ; MOS48 0248 EAEE ^28 MOS48 0233 EADC C8 INY MOS48 0248 EAEE ^28 MOS48 0234 EADD B1 F2 LDAIY WORK MOS48 0248 EAEE ^28 MOS48 0235 EADF C9 7C CMPIM "|" MOS48 0248 EAEE ^28 MOS48 0236 EAE1 F0 1F BEQ GSR0 ;[|| found] MOS48 0248 EAEE ^28 MOS48 0237 EAE3 ; MOS48 0248 EAEE ^28 MOS48 0238 EAE3 C9 22 CMPIM DQUOTE MOS48 0248 EAEE ^28 MOS48 0239 EAE5 F0 1B BEQ GSR0 ;[|" found] MOS48 0248 EAEE ^28 MOS48 0240 EAE7 ; MOS48 0248 EAEE ^28 MOS48 0241 EAE7 C9 21 CMPIM "!" MOS48 0248 EAEE ^28 MOS48 0242 EAE9 D0 05 BNE KEYNPL ;[not |!] MOS48 0248 EAEE ^28 MOS48 0243 EAEB ; C=1 MOS48 0248 EAEE ^28 MOS48 0244 EAEB ; |! found - top bit option MOS48 0248 EAEE ^28 MOS48 0245 EAEB C8 INY ;step to next character MOS48 0248 EAEE ^28 MOS48 0246 EAEC ; C=1 MOS48 0248 EAEE ^28 MOS48 0247 EAEC A9 80 LDAIM &80 ;KMASK := 1000 0000 MOS48 0248 EAEE ^28 MOS48 0248 EAEE D0 A8 BNE GSRA ;[ALWAYS jump, get next character reseting key mask] MOS48 0253 EAF2 ^30 MOS48 0249 EAF0 ; NEVER fall thru MOS48 0253 EAF2 ^30 MOS48 0250 EAF0 MOS48 0253 EAF2 ^30 MOS48 0251 EAF0 KEYNPL ;check for control character MOS48 0253 EAF2 ^30 MOS48 0252 EAF0 C9 20 CMPIM SPACE MOS48 0253 EAF2 ^30 MOS48 0253 EAF2 90 B0 BCC BADSTR ;[string contains a control character] MOS48 0206 EAC2 v41 MOS48 0254 EAF4 ; convert to CTRL character MOS48 0206 EAC2 v41 MOS48 0255 EAF4 C9 3F CMPIM "?" MOS48 0206 EAC2 v41 MOS48 0256 EAF6 F0 08 BEQ KEYDEL MOS48 0206 EAC2 v41 MOS48 0257 EAF8 20 2B EB JSR CTRLCH MOS48 0206 EAC2 v41 MOS48 0258 EAFB ; fall thru with adjusted character MOS48 0206 EAC2 v41 MOS48 0259 EAFB 2C 50 D9 BIT FFBYT ;indicate character was escaped MOS48 0206 EAC2 v41 MOS48 0260 EAFE 70 03 BVS GSRX ;[ALWAYS jump] MOS48 0206 EAC2 v41 MOS48 0261 EB00 ; MOS48 0206 EAC2 v41 MOS48 0262 EB00 KEYDEL ;|? MOS48 0206 EAC2 v41 MOS48 0263 EB00 A9 7F LDAIM MDEL MOS48 MOS48 MOS48 MOS48 Acorn macro assembler Page 106 MOS48 MOS48 External interface routines MOS48 MOS48 0206 EAC2 v41 MOS48 0264 EB02 ; MOS48 0206 EAC2 v41 MOS48 0265 EB02 GSR0 ;valid character MOS48 0206 EAC2 v41 MOS48 0266 EB02 B8 CLV MOS48 0260 EAFE v7C MOS48 0267 EB03 ; MOS48 0260 EAFE v7C MOS48 0268 EB03 GSRX ;exit with valid character MOS48 0260 EAFE v7C MOS48 0269 EB03 ; rotate in selected top bit MOS48 0260 EAFE v7C MOS48 0270 EB03 C8 INY ;skip to next character -- MOS48 0271 EB04 05 E5 ORA KMASK ;test character for filing system applications -- MOS48 0272 EB06 18 CLC -- MOS48 0273 EB07 ; C=0, V=0 => not escaped, V=1 => escaped -- MOS48 0274 EB07 60 RTS -- MOS48 0275 EB08 -- MOS48 0276 EB08 -- MOS48 0277 EB08 [ MOS125 = &FF -- MOS48 0283 EB08 ] -- MOS48 0284 EB08 -- MOS48 0285 EB08 SHIFT ;perform shift inversion -- MOS48 0286 EB08 ; -- MOS48 0287 EB08 ; check for '0' character explicitly -- MOS48 0288 EB08 ; -- MOS48 0289 EB08 C9 30 CMPIM "0" -- MOS48 0290 EB0A F0 1E BEQ SHIFT0 ;[character is '0', shift '0' is '0', no action] MOS48 0290 EB0A v61 MOS48 0291 EB0C MOS48 0290 EB0A v61 MOS48 0292 EB0C ; convert characters in range ['A',DEL) MOS48 0290 EB0A v61 MOS48 0293 EB0C ; MOS48 0290 EB0A v61 MOS48 0294 EB0C C9 40 CMPIM AT MOS48 0290 EB0A v61 MOS48 0295 EB0E F0 1A BEQ SHIFT0 ;[AT, no action] MOS48 0290 EB0A v61 MOS48 0296 EB10 90 12 BCC SHIFT1 ;[ch= 'A' MOS48 0290 EB0A v61 MOS48 0299 EB12 ; MOS48 0290 EB0A v61 MOS48 0300 EB12 C9 7F CMPIM MDEL MOS48 0290 EB0A v61 MOS48 0301 EB14 F0 14 BEQ SHIFT0 ;[ch=DEL, no action] MOS48 0290 EB0A v61 MOS48 0302 EB16 B0 10 BCS SHFLIP ;[ch>DEL, is softkey code] MOS48 0290 EB0A v61 MOS48 0303 EB18 ; MOS48 0290 EB0A v61 MOS48 0304 EB18 ; 'A' <= character < DEL MOS48 0290 EB0A v61 MOS48 0305 EB18 ; MOS48 0290 EB0A v61 MOS48 0306 EB18 CTRLSK ;used by CTRLCH for CTRL/softkey MOS48 0290 EB0A v61 MOS48 0307 EB18 49 30 EORIM &30 ;flip bit to effect shift (N.B. EORIM $10 later) MOS48 0290 EB0A v61 MOS48 0308 EB1A ; MOS48 0290 EB0A v61 MOS48 0309 EB1A ; N.B. this has mapped '_' to $6F and POUND to $50 MOS48 0290 EB0A v61 MOS48 0310 EB1A ; swop underline and pound characters MOS48 0290 EB0A v61 MOS48 0311 EB1A ; MOS48 0290 EB0A v61 MOS48 0312 EB1A C9 6F CMPIM &6F ;i.e. mapped '_' MOS48 0290 EB0A v61 MOS48 0313 EB1C F0 04 BEQ SHIFT2 ;[underline character] MOS48 0290 EB0A v61 MOS48 0314 EB1E C9 50 CMPIM &50 ;i.e. mapped POUND (not altered by EORIM $20 anyway) MOS48 0290 EB0A v61 MOS48 0315 EB20 D0 02 BNE SHIFT1 ;[neither underline nor pound character] MOS48 0290 EB0A v61 MOS48 0316 EB22 ; MOS48 0290 EB0A v61 MOS48 0317 EB22 SHIFT2 ;swop underline and pound characters MOS48 0290 EB0A v61 MOS48 0318 EB22 49 1F EORIM &1F MOS48 0290 EB0A v61 MOS48 0319 EB24 ; MOS48 0290 EB0A v61 MOS48 0320 EB24 SHIFT1 MOS48 0290 EB0A v61 MOS48 0321 EB24 MOS48 0290 EB0A v61 MOS48 0322 EB24 ; convert characters above '!' MOS48 0290 EB0A v61 MOS48 0323 EB24 ; MOS48 0290 EB0A v61 MOS48 0324 EB24 C9 21 CMPIM "!" MOS48 0290 EB0A v61 MOS48 0325 EB26 90 02 BCC SHIFT0 ;[ch<'!', no action] MOS48 0290 EB0A v61 MOS48 0326 EB28 ; MOS48 0290 EB0A v61 MOS48 0327 EB28 ; '!' <= ch < AT MOS48 0290 EB0A v61 MOS48 0328 EB28 ; MOS48 0290 EB0A v61 MOS48 0329 EB28 SHFLIP MOS48 0290 EB0A v61 MOS48 0330 EB28 49 10 EORIM &10 ;$80..$8F -> $90..$9F and vice-versa MOS48 0290 EB0A v61 MOS48 0331 EB2A MOS48 0290 EB0A v61 MOS48 0332 EB2A SHIFT0 MOS48 0290 EB0A v61 MOS48 0333 EB2A 60 RTS MOS48 0339 EB2F ^67 MOS48 0334 EB2B MOS48 0339 EB2F ^67 MOS48 0335 EB2B MOS48 0339 EB2F ^67 MOS48 0336 EB2B CTRLCH ;compute CTRL version of character MOS48 0339 EB2F ^67 MOS48 0337 EB2B C9 7F CMPIM MDEL MOS48 0339 EB2F ^67 MOS48 0338 EB2D F0 0E BEQ CTRL0 ;[CTRL/DEL = DEL] MOS48 0339 EB2F ^67 MOS48 0339 EB2F B0 E7 BCS CTRLSK ;[top bit set, therefore softkey needing EORIM $20] MOS48 0338 EB2D v71 MOS48 0340 EB31 MOS48 0338 EB2D v71 MOS48 0341 EB31 ; pound & underline MOS48 0338 EB2D v71 MOS48 0342 EB31 ; MOS48 0338 EB2D v71 MOS48 0343 EB31 C9 60 CMPIM POUND ;make CTRL/pound = CTRL/underline MOS48 0338 EB2D v71 MOS48 0344 EB33 D0 02 BNE CTRL1 ;[not pound character] MOS48 0338 EB2D v71 MOS48 0345 EB35 A9 5F LDAIM "_" ;substitute underline for pound MOS48 0338 EB2D v71 MOS48 0346 EB37 CTRL1 MOS48 0338 EB2D v71 MOS48 0347 EB37 MOS48 0338 EB2D v71 MOS48 0348 EB37 [ FALSE=0 MOS48 0338 EB2D v71 MOS48 0354 EB37 ] MOS48 0338 EB2D v71 MOS48 0355 EB37 MOS48 0338 EB2D v71 MOS48 0356 EB37 [ FALSE=0 MOS48 0338 EB2D v71 MOS48 0362 EB37 ] MOS48 0338 EB2D v71 MOS48 0363 EB37 MOS48 0338 EB2D v71 MOS48 0364 EB37 C9 40 CMPIM AT MOS48 0338 EB2D v71 MOS48 0365 EB39 90 02 BCC CTRL4 ;[character < AT so do not convert] MOS48 0338 EB2D v71 MOS48 0366 EB3B ; AT <= character < DEL, so convert MOS48 0338 EB2D v71 MOS48 0367 EB3B 29 1F ANDIM &1F ;convert to ctrl value MOS48 0338 EB2D v71 MOS48 0368 EB3D CTRL4 MOS48 0338 EB2D v71 MOS48 0369 EB3D MOS48 0338 EB2D v71 MOS48 0370 EB3D CTRL0 MOS48 0338 EB2D v71 MOS48 0371 EB3D 60 RTS -- MOS48 0372 EB3E -- MOS48 0373 EB3E [ FALSE=0 -- MOS48 0376 EB3E ] -- MOS48 0377 EB3E -- MOS48 0378 EB3E SLBOOT ;'/!BOOT' auto-boot string -- MOS48 0379 EB3E 2F 21 42 = "/!BOOT" -- MOS48 0380 EB44 0D = MCR -- MOS48 0381 EB45 -- MOS48 0382 EB45 -- MOS48 0383 EB45 BREAK ;conditionally intercept BREAK -- MOS48 0384 EB45 ; type of interception is in C -- MOS48 0385 EB45 AD 87 02 LDA BREAKI -- MOS48 0386 EB48 49 4C EORIM &4C -- MOS48 0387 EB4A D0 13 BNE BREAK0 ;[not a JMP instruction] MOS48 0387 EB4A v6C MOS48 0388 EB4C 4C 87 02 JMP BREAKI MOS48 0387 EB4A v6C MOS48 0389 EB4F MOS48 0387 EB4A v6C MOS48 0390 EB4F MOS48 0387 EB4A v6C MOS48 0391 EB4F TV ;alter TV characteristics MOS48 0387 EB4A v6C MOS48 0392 EB4F AD 90 02 LDA VERTIC MOS48 0387 EB4A v6C MOS48 0393 EB52 8E 90 02 STX VERTIC ;vertical height adjust MOS48 0387 EB4A v6C MOS48 0394 EB55 AA TAX ;X := old state MOS48 0387 EB4A v6C MOS48 0395 EB56 98 TYA MOS48 0387 EB4A v6C MOS48 0396 EB57 29 01 ANDIM &01 MOS48 0387 EB4A v6C MOS48 0397 EB59 AC 91 02 LDY INTERL ;Y := old state MOS48 0387 EB4A v6C MOS48 0398 EB5C 8D 91 02 STA INTERL ;interlace invert MOS48 0387 EB4A v6C MOS48 0399 EB5F BREAK0 MOS48 0387 EB4A v6C MOS48 0400 EB5F 60 RTS -- MOS48 0401 EB60 MOS48 MOS48 MOS48 MOS48 Acorn macro assembler Page 107 MOS48 MOS48 External interface routines MOS48 -- MOS48 0402 EB60 [ MOS125 = &FF -- MOS48 0417 EB60 ] -- MOS48 0418 EB60 -- MOS48 0419 EB60 LNK MOS52 -- MOS52 0001 EB60 -- MOS52 0002 EB60 ; MOS52 -- MOS52 0003 EB60 TTL MOS52 Sound generator -- MOS52 0004 EB60 OPT MOS52 MOS52 MOS52 MOS52 MOS52 Acorn macro assembler Page 108 MOS52 MOS52 Sound generator MOS52 -- MOS52 0005 EB60 ;(c) 1981 ACORN Computers Limited -- MOS52 0006 EB60 ;BBC Microcomputer Machine Operating System (MOS) -- MOS52 0007 EB60 ;Change record: -- MOS52 0008 EB60 ;Prototype version 14/1/82 -- MOS52 0009 EB60 ;Author(s): -- MOS52 0010 EB60 ;PBM Peter Miller -- MOS52 0011 EB60 ;Internal variable allocation $0800 to $08C0 -- MOS52 0012 EB60 08C0 ENV * ENVEL ;envelope table 16 bytes per envelope -- MOS52 0013 EB60 0804 ATTN * SNDWRK+&04 ;current attenuation -- MOS52 0014 EB60 0808 EPERD * ATTN +&04 ;current envelope period -- MOS52 0015 EB60 080C SNOTE * EPERD +&04 ;base note -- MOS52 0016 EB60 0810 NPERD * SNOTE +&04 ;the current frequency envelope period 0-3 -- MOS52 0017 EB60 0814 NCONT * NPERD +&04 ;number of ticks left in current frequency period -- MOS52 0018 EB60 0818 DUR * NCONT +&04 ;remaining number of ticks in the current note -- MOS52 0019 EB60 081C DRDIV * DUR +&04 ;division of 1/100 sewc to 1/20 sec -- MOS52 0020 EB60 0820 ENVLP * DRDIV +&04 ;current envelope ( TIMES 16) -- MOS52 0021 EB60 0824 SCONT * ENVLP +&04 ;number of 1/100th secs before next envelope tick -- MOS52 0022 EB60 0828 WAIT * SCONT +&04 ;channel waiting for sWATGO flag -- MOS52 0023 EB60 082C OLDNTE * WAIT +&04 ;current note in chip -- MOS52 0024 EB60 0830 NTADD * OLDNTE +&04 ;current offset from base note -- MOS52 0025 EB60 -- MOS52 0026 EB60 -- MOS52 0027 EB60 0838 NOWAT * NTADD +&08 ;number of other channels required for chord -- MOS52 0028 EB60 0839 ATINC * NOWAT +&01 ;current rate of attn change -- MOS52 0029 EB60 083A PEAK * ATINC +&01 ;peak of amplitude envelope -- MOS52 0030 EB60 083B WATGO * PEAK +&01 ;flag <>0 => play chord -- MOS52 0031 EB60 083C FRACT * WATGO +&01 ;fractional part of current note -- MOS52 0032 EB60 083D PRDL * FRACT +&01 ;low period during convert -- MOS52 0033 EB60 083E PRDH * PRDL +&01 ;hign period during convert -- MOS52 0034 EB60 083F NOTDIF * PRDH +&01 ;Note difference used in interpolation -- MOS52 0035 EB60 -- MOS52 0036 EB60 02CF FLUSH * SFLUSH -&04 -- MOS52 0037 EB60 0800 ACTIV * MACTIV -&04 -- MOS52 0038 EB60 -- MOS52 0039 EB60 -- MOS52 0040 EB60 ;Externally referenced data -- MOS52 0041 EB60 ;ACTIV -- MOS52 0042 EB60 ;FLUSH -- MOS52 0043 EB60 ;ENVEL -- MOS52 0044 EB60 ;SNDWRK -- MOS52 0045 EB60 ;Externally referenced routines -- MOS52 0046 EB60 ;EXAM -- MOS52 0047 EB60 ;REMOV -- MOS52 0048 EB60 ;Entry points -- MOS52 0049 EB60 ;SNDRST Initialise sound system, shut sound chip up -- MOS52 0050 EB60 ; Acc,X,Y ,P destroyed -- MOS52 0051 EB60 ;SNDIRQ Service entry point 1/100th second -- MOS52 0052 EB60 ; only use after initialisation -- MOS52 0053 EB60 ; Acc,X ,Y and P destroyed -- MOS52 0054 EB60 ;; A,X,P preserved, Y set to zero on exit -- MOS52 0055 EB60 -- MOS52 0056 EB60 -- MOS52 0057 EB60 MINATN ;set minimum attenuation -- MOS52 0058 EB60 A9 04 LDAIM &04 -- MOS52 0059 EB62 9D 08 08 STAAX EPERD -- MOS52 0060 EB65 A9 C0 LDAIM &C0 -- MOS52 0061 EB67 -- MOS52 0062 EB67 -- MOS52 0063 EB67 UPATN ;update attenuation -- MOS52 0064 EB67 9D 04 08 STAAX ATTN -- MOS52 0065 EB6A ; -- MOS52 0066 EB6A ; shut up mode ? -- MOS52 0067 EB6A ; -- MOS52 0068 EB6A AC 62 02 LDY SHUTUP -- MOS52 0069 EB6D F0 02 BEQ NOISY ;[sound allowed] MOS52 0069 EB6D v7D MOS52 0070 EB6F ; sound suppressed MOS52 0069 EB6D v7D MOS52 0071 EB6F A9 C0 LDAIM &C0 ;force minimum attenuation MOS52 0069 EB6D v7D MOS52 0072 EB71 NOISY MOS52 0069 EB6D v7D MOS52 0073 EB71 ; MOS52 0069 EB6D v7D MOS52 0074 EB71 [ MOS125 = &FF MOS52 0069 EB6D v7D MOS52 0083 EB71 | MOS52 0069 EB6D v7D MOS52 0084 EB71 ; in: x ~b3 b2 b1 b0 x x x MOS52 0069 EB6D v7D MOS52 0085 EB71 ;out: c2 c1 c0 1 ~b3 ~b2 ~b1 ~b0 MOS52 0069 EB6D v7D MOS52 0086 EB71 4A LSRA -- MOS52 0087 EB72 4A LSRA -- MOS52 0088 EB73 4A LSRA -- MOS52 0089 EB74 1D 96 EB ORAAX CHAN -- MOS52 0090 EB77 29 EF ANDIM &EF -- MOS52 0091 EB79 49 17 EORIM &17 -- MOS52 0092 EB7B ] -- MOS52 0093 EB7B ;fall into the send routine -- MOS52 0094 EB7B SNDOUT -- MOS52 0095 EB7B SEND -- MOS52 0096 EB7B 08 PHP -- MOS52 0097 EB7C SENDX ;entered by code which has already done a PHP -- MOS52 0098 EB7C 78 SEI -- MOS52 0099 EB7D A0 FF LDYIM &FF -- MOS52 0100 EB7F 8C 43 FE STY &FE43 -- MOS52 0101 EB82 8D 4F FE STA &FE4F -- MOS52 0102 EB85 C8 INY -- MOS52 0103 EB86 8C 40 FE STY &FE40 -- MOS52 0104 EB89 A0 02 LDYIM &02 -- MOS52 0105 EB8B SWAIT -- MOS52 0106 EB8B 88 DEY MOS52 0107 EB8C ^7D MOS52 0107 EB8C D0 FD BNE SWAIT -- MOS52 0108 EB8E A0 08 LDYIM &08 -- MOS52 0109 EB90 8C 40 FE STY &FE40 -- MOS52 0110 EB93 A0 04 LDYIM &04 -- MOS52 0111 EB95 SWAT2 -- MOS52 0112 EB95 88 DEY MOS52 0113 EB96 ^7D MOS52 0113 EB96 D0 FD BNE SWAT2 -- MOS52 0114 EB98 28 PLP -- MOS52 0115 EB99 60 RTS -- MOS52 0116 EB9A RCHAN -- MOS52 0117 EB9A EB96 CHAN * RCHAN -&04 -- MOS52 0118 EB9A E0 = &E0 -- MOS52 0119 EB9B C0 = &C0 -- MOS52 0120 EB9C A0 = &A0 -- MOS52 0121 EB9D 80 = &80 -- MOS52 0122 EB9E -- MOS52 0123 EB9E -- MOS52 0124 EB9E HENDS -- MOS52 0125 EB9E 4C 9F EC JMP ENDSW ;finished all envelope processing MOS52 0172 EBEF ^2D MOS52 0126 EBA1 MOS52 0172 EBEF ^2D MOS52 0127 EBA1 SNDIRQ MOS52 0172 EBEF ^2D MOS52 0128 EBA1 A9 00 LDAIM ZERO MOS52 0172 EBEF ^2D MOS52 0129 EBA3 8D 3B 08 STA WATGO MOS52 0172 EBEF ^2D MOS52 0130 EBA6 AD 38 08 LDA NOWAT MOS52 0172 EBEF ^2D MOS52 0131 EBA9 D0 06 BNE MAN2 MOS52 0172 EBEF ^2D MOS52 0132 EBAB EE 3B 08 INC WATGO MOS52 0172 EBEF ^2D MOS52 0133 EBAE CE 38 08 DEC NOWAT MOS52 MOS52 MOS52 MOS52 Acorn macro assembler Page 109 MOS52 MOS52 Sound generator MOS52 MOS52 0172 EBEF ^2D MOS52 0134 EBB1 MAN2 MOS52 0172 EBEF ^2D MOS52 0135 EBB1 A2 08 LDXIM &08 ;X always contains current channel MOS52 0172 EBEF ^2D MOS52 0136 EBB3 MNLOP MOS52 0172 EBEF ^2D MOS52 0137 EBB3 CA DEX ;first real channel is 3 MOS52 0172 EBEF ^2D MOS52 0138 EBB4 BD 00 08 LDAAX ACTIV ;check if channel X is doing anything MOS52 0172 EBEF ^2D MOS52 0139 EBB7 F0 E5 BEQ HENDS ;[channel not active so take quick route] MOS52 0172 EBEF ^2D MOS52 0140 EBB9 BD CF 02 LDAAX FLUSH MOS52 0172 EBEF ^2D MOS52 0141 EBBC 30 05 BMI MAN8 ;[must abort current note] MOS52 0172 EBEF ^2D MOS52 0142 EBBE BD 18 08 LDAAX DUR MOS52 0172 EBEF ^2D MOS52 0143 EBC1 D0 03 BNE MAN10 ;[note finished] MOS52 0172 EBEF ^2D MOS52 0144 EBC3 MAN8 MOS52 0172 EBEF ^2D MOS52 0145 EBC3 20 B1 EC JSR NXTNT ;[get new note from queue if it exists] MOS52 0172 EBEF ^2D MOS52 0146 EBC6 MAN10 MOS52 0172 EBEF ^2D MOS52 0147 EBC6 BD 18 08 LDAAX DUR MOS52 0172 EBEF ^2D MOS52 0148 EBC9 F0 13 BEQ MAN13 ;next note now MOS52 0172 EBEF ^2D MOS52 0149 EBCB C9 FF CMPIM &FF MOS52 0172 EBEF ^2D MOS52 0150 EBCD F0 12 BEQ MAN12 MOS52 0172 EBEF ^2D MOS52 0151 EBCF DE 1C 08 DECAX DRDIV MOS52 0172 EBEF ^2D MOS52 0152 EBD2 D0 0D BNE MAN12 ;[not 1/20th sec tick] MOS52 0172 EBEF ^2D MOS52 0153 EBD4 A9 05 LDAIM &05 MOS52 0172 EBEF ^2D MOS52 0154 EBD6 9D 1C 08 STAAX DRDIV ; set counter to wait for further 1/20th sec MOS52 0172 EBEF ^2D MOS52 0155 EBD9 DE 18 08 DECAX DUR MOS52 0172 EBEF ^2D MOS52 0156 EBDC D0 03 BNE MAN12 MOS52 0172 EBEF ^2D MOS52 0157 EBDE MAN13 MOS52 0172 EBEF ^2D MOS52 0158 EBDE 20 B1 EC JSR NXTNT ;try to get a new note MOS52 0172 EBEF ^2D MOS52 0159 EBE1 MAN12 MOS52 0172 EBEF ^2D MOS52 0160 EBE1 BD 24 08 LDAAX SCONT MOS52 0172 EBEF ^2D MOS52 0161 EBE4 F0 05 BEQ MAN11 MOS52 0172 EBEF ^2D MOS52 0162 EBE6 DE 24 08 DECAX SCONT ;dec envelope scaling counter MOS52 0172 EBEF ^2D MOS52 0163 EBE9 D0 B3 BNE HENDS ;[not time for new envelope tick] MOS52 0172 EBEF ^2D MOS52 0164 EBEB MAN11 MOS52 0172 EBEF ^2D MOS52 0165 EBEB BC 20 08 LDYAX ENVLP ;get envelope offset into Y MOS52 0172 EBEF ^2D MOS52 0166 EBEE [ MOS125 = &FF MOS52 0172 EBEF ^2D MOS52 0170 EBEE | MOS52 0172 EBEF ^2D MOS52 0171 EBEE C8 INY MOS52 0172 EBEF ^2D MOS52 0172 EBEF F0 AD BEQ HENDS -- MOS52 0173 EBF1 B9 BF 08 LDAAY ENV-&01 ;get first envelope parameter -- MOS52 0174 EBF4 ] -- MOS52 0175 EBF4 29 7F ANDIM &7F ;mask off sweep repeat bit -- MOS52 0176 EBF6 9D 24 08 STAAX SCONT ;set up scaling counter again -- MOS52 0177 EBF9 BD 08 08 LDAAX EPERD ;envelope period -- MOS52 0178 EBFC C9 04 CMPIM &04 ;check for 'finished' period -- MOS52 0179 EBFE F0 52 BEQ ENDEV ;[no longer in middle of envelope] MOS52 0179 EBFE v2D MOS52 0180 EC00 ; MOS52 0179 EBFE v2D MOS52 0181 EC00 [ MOS125 = &FF MOS52 0179 EBFE v2D MOS52 0183 EC00 ] MOS52 0179 EBFE v2D MOS52 0184 EC00 18 CLC MOS52 0179 EBFE v2D MOS52 0185 EC01 7D 20 08 ADCAX ENVLP ;get offset to current amplitude envelope parameters MOS52 0179 EBFE v2D MOS52 0186 EC04 A8 TAY ;ENV+7,Y now point to attninc rate and sENV+11 to attnlevel MOS52 0179 EBFE v2D MOS52 0187 EC05 B9 CB 08 LDAAY ENV+&0B ;atenuation level MOS52 0179 EBFE v2D MOS52 0188 EC08 38 SEC MOS52 0179 EBFE v2D MOS52 0189 EC09 E9 3F SBCIM &3F MOS52 0179 EBFE v2D MOS52 0190 EC0B 8D 3A 08 STA PEAK ;temp data for following calculations MOS52 0179 EBFE v2D MOS52 0191 EC0E B9 C7 08 LDAAY ENV+&7 ;amount by which attenuation is changed each tick MOS52 0179 EBFE v2D MOS52 0192 EC11 8D 39 08 STA ATINC ;temp data for calculations MOS52 0179 EBFE v2D MOS52 0193 EC14 BD 04 08 LDAAX ATTN MOS52 0179 EBFE v2D MOS52 0194 EC17 48 PHA MOS52 0179 EBFE v2D MOS52 0195 EC18 18 CLC MOS52 0179 EBFE v2D MOS52 0196 EC19 6D 39 08 ADC ATINC ;add incremnet to attenuation MOS52 0179 EBFE v2D MOS52 0197 EC1C 50 04 BVC OK8 ;first check for 8 bit overflow MOS52 0179 EBFE v2D MOS52 0198 EC1E [ MOS125 = &FF MOS52 0179 EBFE v2D MOS52 0216 EC1E | MOS52 0179 EBFE v2D MOS52 0217 EC1E ;else overflow. carry=~b7. generate &C0 if b7=0 or &3F if b7=1 MOS52 0179 EBFE v2D MOS52 0218 EC1E 09 7F ORAIM &7F ;n111 1111 C=~n MOS52 0179 EBFE v2D MOS52 0219 EC20 69 40 ADCIM &40 ;~~nn nnnn C=n MOS52 0179 EBFE v2D MOS52 0220 EC22 OK8 MOS52 0179 EBFE v2D MOS52 0221 EC22 C9 C0 CMPIM &C0 ;compare b7 and b6 (thanks again Woz) MOS52 0179 EBFE v2D MOS52 0222 EC24 10 06 BPL ATOK ;if b7=b6 then value in range MOS52 0179 EBFE v2D MOS52 0223 EC26 ;else overflow. generate &3F if b7=0 or &C0 if b7=1 MOS52 0179 EBFE v2D MOS52 0224 EC26 09 7F ORAIM &7F ;n111 1111 C=0 MOS52 0179 EBFE v2D MOS52 0225 EC28 69 40 ADCIM &40 ;~011 1111 C=n MOS52 0179 EBFE v2D MOS52 0226 EC2A 69 80 ADCIM &80 ;nn~~ ~~~~ C=~n MOS52 0179 EBFE v2D MOS52 0227 EC2C ATOK MOS52 0179 EBFE v2D MOS52 0228 EC2C 9D 04 08 STAAX ATTN ;store as new attenuation MOS52 0179 EBFE v2D MOS52 0229 EC2F CE 39 08 DEC ATINC MOS52 0179 EBFE v2D MOS52 0230 EC32 ;the following code checks that (ATTN-PEAK)*SIGN(increment)>=0 MOS52 0179 EBFE v2D MOS52 0231 EC32 ] MOS52 0179 EBFE v2D MOS52 0232 EC32 38 SEC MOS52 0179 EBFE v2D MOS52 0233 EC33 ED 3A 08 SBC PEAK MOS52 0179 EBFE v2D MOS52 0234 EC36 4D 39 08 EOR ATINC MOS52 0179 EBFE v2D MOS52 0235 EC39 30 09 BMI SMPER ;[attenuation has not reached limit yet] MOS52 0179 EBFE v2D MOS52 0236 EC3B AD 3A 08 LDA PEAK ;attn was too large therefore set to peak MOS52 0179 EBFE v2D MOS52 0237 EC3E 9D 04 08 STAAX ATTN MOS52 0179 EBFE v2D MOS52 0238 EC41 FE 08 08 INCAX EPERD ;next envelope period MOS52 0179 EBFE v2D MOS52 0239 EC44 SMPER ;same envelope period MOS52 0179 EBFE v2D MOS52 0240 EC44 68 PLA MOS52 0179 EBFE v2D MOS52 0241 EC45 5D 04 08 EORAX ATTN MOS52 0179 EBFE v2D MOS52 0242 EC48 29 F8 ANDIM &F8 MOS52 0179 EBFE v2D MOS52 0243 EC4A F0 06 BEQ NNEWA ;no new chip attenuation output (hasn't changed)] MOS52 0179 EBFE v2D MOS52 0244 EC4C BD 04 08 LDAAX ATTN MOS52 0179 EBFE v2D MOS52 0245 EC4F 20 67 EB JSR UPATN ;update chip attenuation MOS52 0179 EBFE v2D MOS52 0246 EC52 NNEWA MOS52 0179 EBFE v2D MOS52 0247 EC52 ENDEV MOS52 0179 EBFE v2D MOS52 0248 EC52 ;frequency sweeping part of envelope MOS52 0179 EBFE v2D MOS52 0249 EC52 BD 10 08 LDAAX NPERD -- MOS52 0250 EC55 C9 03 CMPIM &03 -- MOS52 0251 EC57 F0 46 BEQ ENDSW MOS52 0251 EC57 v39 MOS52 0252 EC59 [ MOS125 = &FF MOS52 0251 EC57 v39 MOS52 0258 EC59 | MOS52 0251 EC57 v39 MOS52 0259 EC59 BC 14 08 LDYAX NCONT ;number of ticks left in this frequency period MOS52 0251 EC57 v39 MOS52 0260 EC5C D0 25 BNE GTPRD MOS52 0251 EC57 v39 MOS52 0261 EC5E FE 10 08 INCAX NPERD ;next period MOS52 0251 EC57 v39 MOS52 0262 EC61 C9 02 CMPIM &03-&01 ;check for period=3 =>end of all periods MOS52 0251 EC57 v39 MOS52 0263 EC63 38 SEC ;A=next period - 1, increment it before forming pointer MOS52 0251 EC57 v39 MOS52 0264 EC64 ] MOS52 0251 EC57 v39 MOS52 0265 EC64 D0 11 BNE NTLF ;[not last period] MOS52 0251 EC57 v39 MOS52 0266 EC66 BC 20 08 LDYAX ENVLP ;the following checks for bit 8 set in the first envelope byte=> no sweep repeat MOS52 0251 EC57 v39 MOS52 0267 EC69 B9 C0 08 LDAAY ENV MOS52 0251 EC57 v39 MOS52 0268 EC6C 30 31 BMI ENDSW ;[not a repeating sweep therefore jump to end] MOS52 0251 EC57 v39 MOS52 0269 EC6E A9 00 LDAIM ZERO MOS52 0251 EC57 v39 MOS52 0270 EC70 9D 30 08 STAAX NTADD ;reset amount added to note to zero for next sweep MOS52 0251 EC57 v39 MOS52 0271 EC73 9D 10 08 STAAX NPERD ;first sweep period MOS52 0251 EC57 v39 MOS52 0272 EC76 [ MOS125 = &FF MOS52 0251 EC57 v39 MOS52 0276 EC76 | MOS52 0251 EC57 v39 MOS52 0277 EC76 18 CLC ;A=next period, do not adjust MOS52 0251 EC57 v39 MOS52 0278 EC77 NTLF MOS52 0251 EC57 v39 MOS52 0279 EC77 ;the following points Y to the sweep parameters of the current envelope/period MOS52 0251 EC57 v39 MOS52 0280 EC77 ] MOS52 0251 EC57 v39 MOS52 0281 EC77 7D 20 08 ADCAX ENVLP MOS52 0251 EC57 v39 MOS52 0282 EC7A A8 TAY MOS52 0251 EC57 v39 MOS52 0283 EC7B B9 C4 08 LDAAY ENV+&04 MOS52 MOS52 MOS52 MOS52 Acorn macro assembler Page 110 MOS52 MOS52 Sound generator MOS52 MOS52 0251 EC57 v39 MOS52 0284 EC7E 9D 14 08 STAAX NCONT ;number of cycles for this frequency period MOS52 0251 EC57 v39 MOS52 0285 EC81 F0 1C BEQ ENDSW ;zero frequency period MOS52 0251 EC57 v39 MOS52 0286 EC83 GTPRD MOS52 0251 EC57 v39 MOS52 0287 EC83 DE 14 08 DECAX NCONT MOS52 0251 EC57 v39 MOS52 0288 EC86 BD 20 08 LDAAX ENVLP MOS52 0251 EC57 v39 MOS52 0289 EC89 18 CLC MOS52 0251 EC57 v39 MOS52 0290 EC8A 7D 10 08 ADCAX NPERD MOS52 0251 EC57 v39 MOS52 0291 EC8D A8 TAY MOS52 0251 EC57 v39 MOS52 0292 EC8E B9 C1 08 LDAAY ENV+&01 ;note increment for this frequency period MOS52 0251 EC57 v39 MOS52 0293 EC91 18 CLC MOS52 0251 EC57 v39 MOS52 0294 EC92 7D 30 08 ADCAX NTADD MOS52 0251 EC57 v39 MOS52 0295 EC95 9D 30 08 STAAX NTADD ;add increment to the note offset MOS52 0251 EC57 v39 MOS52 0296 EC98 18 CLC MOS52 0251 EC57 v39 MOS52 0297 EC99 7D 0C 08 ADCAX SNOTE MOS52 0251 EC57 v39 MOS52 0298 EC9C 20 43 ED JSR CNVRT ;convert note to period and output MOS52 0251 EC57 v39 MOS52 0299 EC9F ENDSW MOS52 0251 EC57 v39 MOS52 0300 EC9F E0 04 CPXIM &04 ;'test channel number for zero' -- MOS52 0301 ECA1 F0 0D BEQ EDUP ;[channel was zero therefore leave loop] MOS52 0301 ECA1 v72 MOS52 0302 ECA3 4C B3 EB JMP MNLOP MOS52 0301 ECA1 v72 MOS52 0303 ECA6 MOS52 0301 ECA1 v72 MOS52 0304 ECA6 MOS52 0301 ECA1 v72 MOS52 0305 ECA6 SNDRST MOS52 0301 ECA1 v72 MOS52 0306 ECA6 A2 08 LDXIM &08 MOS52 0301 ECA1 v72 MOS52 0307 ECA8 ; MOS52 0301 ECA1 v72 MOS52 0308 ECA8 RLOP MOS52 0301 ECA1 v72 MOS52 0309 ECA8 CA DEX MOS52 0301 ECA1 v72 MOS52 0310 ECA9 20 E5 EC JSR SCRST ;reset sound channel X MOS52 0301 ECA1 v72 MOS52 0311 ECAC E0 04 CPXIM &04 MOS52 0301 ECA1 v72 MOS52 0312 ECAE D0 F8 BNE RLOP MOS52 0301 ECA1 v72 MOS52 0313 ECB0 ; MOS52 0301 ECA1 v72 MOS52 0314 ECB0 EDUP ;end of 1/100th sec processing MOS52 0301 ECA1 v72 MOS52 0315 ECB0 60 RTS -- MOS52 0316 ECB1 -- MOS52 0317 ECB1 -- MOS52 0318 ECB1 NXTNT -- MOS52 0319 ECB1 BD 08 08 LDAAX EPERD ;get current amplitude period -- MOS52 0320 ECB4 C9 04 CMPIM &04 ;period 4 => note has fully released -- MOS52 0321 ECB6 F0 05 BEQ ELDDN MOS52 0321 ECB6 v7A MOS52 0322 ECB8 A9 03 LDAIM &03 MOS52 0321 ECB6 v7A MOS52 0323 ECBA 9D 08 08 STAAX EPERD ;put note in the release phase of the envelope MOS52 0321 ECB6 v7A MOS52 0324 ECBD ELDDN MOS52 0321 ECB6 v7A MOS52 0325 ECBD BD CF 02 LDAAX FLUSH -- MOS52 0326 ECC0 F0 13 BEQ NOFL ;[no flush has been flagged] MOS52 0326 ECC0 v6C MOS52 0327 ECC2 A9 00 LDAIM ZERO MOS52 0326 ECC0 v6C MOS52 0328 ECC4 9D CF 02 STAAX FLUSH ;clear the flush flag MOS52 0326 ECC0 v6C MOS52 0329 ECC7 [ MOS125 = &FF MOS52 0326 ECC0 v6C MOS52 0344 ECC7 | MOS52 0326 ECC0 v6C MOS52 0345 ECC7 A0 03 LDYIM &03 ;the following clears all wait variables MOS52 0326 ECC0 v6C MOS52 0346 ECC9 SWTLOP MOS52 0326 ECC0 v6C MOS52 0347 ECC9 99 2C 08 STAAY WAIT +&04 MOS52 0326 ECC0 v6C MOS52 0348 ECCC 88 DEY MOS52 0326 ECC0 v6C MOS52 0349 ECCD 10 FA BPL SWTLOP MOS52 0326 ECC0 v6C MOS52 0350 ECCF 9D 18 08 STAAX DUR ;set duration to zero => note finished MOS52 0326 ECC0 v6C MOS52 0351 ECD2 8C 38 08 STY NOWAT ;reset chord building status MOS52 0326 ECC0 v6C MOS52 0352 ECD5 NOFL ;A=0 MOS52 0326 ECC0 v6C MOS52 0353 ECD5 DD 28 08 CMPAX WAIT ;check it channel waiting for chord -- MOS52 0354 ECD8 F0 43 BEQ NOTWT MOS52 0354 ECD8 v3C MOS52 0355 ECDA CD 3B 08 CMP WATGO ;check if chord now ready to play MOS52 0354 ECD8 v3C MOS52 0356 ECDD F0 34 BEQ NOTGO ;[chord not ready yet] else C=0 MOS52 0354 ECD8 v3C MOS52 0357 ECDF ] MOS52 0354 ECD8 v3C MOS52 0358 ECDF 9D 28 08 STAAX WAIT ;clear waiting for chord status MOS52 0354 ECD8 v3C MOS52 0359 ECE2 NNWAT MOS52 0354 ECD8 v3C MOS52 0360 ECE2 4C D6 ED JMP STRNT ;start playing note MOS52 0354 ECD8 v3C MOS52 0361 ECE5 SCRST ;reset sound channel X MOS52 0354 ECD8 v3C MOS52 0362 ECE5 20 60 EB JSR MINATN MOS52 0354 ECD8 v3C MOS52 0363 ECE8 98 TYA MOS52 0354 ECD8 v3C MOS52 0364 ECE9 9D 18 08 STAAX DUR MOS52 0354 ECD8 v3C MOS52 0365 ECEC 9D CF 02 STAAX FLUSH MOS52 0354 ECD8 v3C MOS52 0366 ECEF 9D 00 08 STAAX ACTIV MOS52 0354 ECD8 v3C MOS52 0367 ECF2 ; MOS52 0354 ECD8 v3C MOS52 0368 ECF2 ;clear wait periods to zero MOS52 0354 ECD8 v3C MOS52 0369 ECF2 ; MOS52 0354 ECD8 v3C MOS52 0370 ECF2 A0 03 LDYIM &03 MOS52 0354 ECD8 v3C MOS52 0371 ECF4 CWP MOS52 0354 ECD8 v3C MOS52 0372 ECF4 99 2C 08 STAAY WAIT+&04 MOS52 0354 ECD8 v3C MOS52 0373 ECF7 88 DEY MOS52 0354 ECD8 v3C MOS52 0374 ECF8 10 FA BPL CWP ;[more wait periods to clear] MOS52 0354 ECD8 v3C MOS52 0375 ECFA ; Y=$FF MOS52 0354 ECD8 v3C MOS52 0376 ECFA ; MI true MOS52 0354 ECD8 v3C MOS52 0377 ECFA ; MOS52 0354 ECD8 v3C MOS52 0378 ECFA ; indicate no channels waiting MOS52 0354 ECD8 v3C MOS52 0379 ECFA ; MOS52 0354 ECD8 v3C MOS52 0380 ECFA 8C 38 08 STY NOWAT MOS52 0354 ECD8 v3C MOS52 0381 ECFD ; MOS52 0354 ECD8 v3C MOS52 0382 ECFD 30 49 BMI FCNVRT ;[ALWAYS JUMP, set period of chip to zero] MOS52 0382 ECFD v36 MOS52 0383 ECFF MOS52 0382 ECFD v36 MOS52 0384 ECFF MOS52 0382 ECFD v36 MOS52 0385 ECFF NGONG MOS52 0382 ECFD v36 MOS52 0386 ECFF 08 PHP MOS52 0382 ECFD v36 MOS52 0387 ED00 78 SEI MOS52 0382 ECFD v36 MOS52 0388 ED01 BD 08 08 LDAAX EPERD ;while irq disabled check if active can be cleared MOS52 0382 ECFD v36 MOS52 0389 ED04 C9 04 CMPIM &04 ;if envelope period=4 then note finished MOS52 0382 ECFD v36 MOS52 0390 ED06 D0 0A BNE NOGO2 ;[note not yet released] MOS52 0382 ECFD v36 MOS52 0391 ED08 20 D3 E4 JSR EXAM ;check for recent arrival of note MOS52 0382 ECFD v36 MOS52 0392 ED0B 90 05 BCC NOGO2 ;queue no longer empty MOS52 0382 ECFD v36 MOS52 0393 ED0D A9 00 LDAIM ZERO MOS52 0382 ECFD v36 MOS52 0394 ED0F 9D 00 08 STAAX ACTIV ;set channel as inactive MOS52 0382 ECFD v36 MOS52 0395 ED12 NOGO2 MOS52 0382 ECFD v36 MOS52 0396 ED12 28 PLP MOS52 0382 ECFD v36 MOS52 0397 ED13 NOTGO MOS52 0382 ECFD v36 MOS52 0398 ED13 BC 20 08 LDYAX ENVLP MOS52 0382 ECFD v36 MOS52 0399 ED16 [ MOS125 = &FF MOS52 0382 ECFD v36 MOS52 0401 ED16 | MOS52 0382 ECFD v36 MOS52 0402 ED16 C8 INY MOS52 0382 ECFD v36 MOS52 0403 ED17 ] MOS52 0382 ECFD v36 MOS52 0404 ED17 D0 03 BNE PROG MOS52 0382 ECFD v36 MOS52 0405 ED19 20 60 EB JSR MINATN ;update attenuation of box envelopes MOS52 0382 ECFD v36 MOS52 0406 ED1C PROG MOS52 0382 ECFD v36 MOS52 0407 ED1C PRTS ;rts pointer MOS52 0382 ECFD v36 MOS52 0408 ED1C 60 RTS MOS52 0382 ECFD v36 MOS52 0409 ED1D MOS52 0382 ECFD v36 MOS52 0410 ED1D MOS52 0382 ECFD v36 MOS52 0411 ED1D NOTWT MOS52 0382 ECFD v36 MOS52 0412 ED1D 20 D3 E4 JSR EXAM ;examine byte at head of queue MOS52 0382 ECFD v36 MOS52 0413 ED20 B0 DD BCS NGONG ;[queue empty] MOS52 0382 ECFD v36 MOS52 0414 ED22 29 03 ANDIM &03 MOS52 0382 ECFD v36 MOS52 0415 ED24 F0 BC BEQ NNWAT ;[no chord commands for next note] MOS52 0382 ECFD v36 MOS52 0416 ED26 AD 38 08 LDA NOWAT MOS52 0382 ECFD v36 MOS52 0417 ED29 F0 15 BEQ SRTS ;[full chord already accepted,ignore this channel for now] MOS52 0382 ECFD v36 MOS52 0418 ED2B FE 28 08 INCAX WAIT ;set waiting flag MOS52 0382 ECFD v36 MOS52 0419 ED2E 2C 38 08 BIT NOWAT ;check for chord being built MOS52 MOS52 MOS52 MOS52 Acorn macro assembler Page 111 MOS52 MOS52 Sound generator MOS52 MOS52 0382 ECFD v36 MOS52 0420 ED31 10 0A BPL SMCRD ;chord already being built MOS52 0382 ECFD v36 MOS52 0421 ED33 20 D3 E4 JSR EXAM ;getheader byte again MOS52 0382 ECFD v36 MOS52 0422 ED36 29 03 ANDIM &03 ;select chord bits MOS52 0382 ECFD v36 MOS52 0423 ED38 8D 38 08 STA NOWAT ;new chord so set number of other channels required MOS52 0382 ECFD v36 MOS52 0424 ED3B 10 03 BPL LNOTGO MOS52 0382 ECFD v36 MOS52 0425 ED3D SMCRD MOS52 0382 ECFD v36 MOS52 0426 ED3D CE 38 08 DEC NOWAT ;decrement the number of channels still required for chord MOS52 0382 ECFD v36 MOS52 0427 ED40 SRTS ;must point to RTS command MOS52 0382 ECFD v36 MOS52 0428 ED40 LNOTGO MOS52 0382 ECFD v36 MOS52 0429 ED40 4C 13 ED JMP NOTGO MOS52 0382 ECFD v36 MOS52 0430 ED43 MOS52 0382 ECFD v36 MOS52 0431 ED43 MOS52 0382 ECFD v36 MOS52 0432 ED43 ;routine to convert note to period MOS52 0382 ECFD v36 MOS52 0433 ED43 ;and output to the chip MOS52 0382 ECFD v36 MOS52 0434 ED43 CNVRT MOS52 0382 ECFD v36 MOS52 0435 ED43 DD 2C 08 CMPAX OLDNTE MOS52 0382 ECFD v36 MOS52 0436 ED46 F0 D4 BEQ PRTS ;no need to update chip MOS52 0382 ECFD v36 MOS52 0437 ED48 FCNVRT ;force note output MOS52 0382 ECFD v36 MOS52 0438 ED48 9D 2C 08 STAAX OLDNTE -- MOS52 0439 ED4B E0 04 CPXIM &04 ;check if noise channel -- MOS52 0440 ED4D D0 08 BNE TONE MOS52 0440 ED4D v77 MOS52 0441 ED4F 29 0F ANDIM &0F ;noise input is only 4 bits MOS52 0440 ED4D v77 MOS52 0442 ED51 1D 96 EB ORAAX CHAN ;add channel information MOS52 0440 ED4D v77 MOS52 0443 ED54 08 PHP ;push P (will immediately be pulled) MOS52 0440 ED4D v77 MOS52 0444 ED55 [ MOS125 = &FF MOS52 0440 ED4D v77 MOS52 0446 ED55 | MOS52 0440 ED4D v77 MOS52 0447 ED55 B0 7C BCS CDONE ;output and return MOS52 0447 ED55 v03 MOS52 0448 ED57 ] MOS52 0447 ED55 v03 MOS52 0449 ED57 TONE ;tone channel MOS52 0447 ED55 v03 MOS52 0450 ED57 48 PHA MOS52 0447 ED55 v03 MOS52 0451 ED58 29 03 ANDIM &03 MOS52 0447 ED55 v03 MOS52 0452 ED5A 8D 3C 08 STA FRACT ;low 2 bits give fraction of semitone MOS52 0447 ED55 v03 MOS52 0453 ED5D [ MOS125 = &FF MOS52 0447 ED55 v03 MOS52 0465 ED5D | MOS52 0447 ED55 v03 MOS52 0466 ED5D 68 PLA MOS52 0447 ED55 v03 MOS52 0467 ED5E 4A LSRA MOS52 0447 ED55 v03 MOS52 0468 ED5F 4A LSRA MOS52 0447 ED55 v03 MOS52 0469 ED60 8D 3D 08 STA PRDL MOS52 0447 ED55 v03 MOS52 0470 ED63 OCTL MOS52 0447 ED55 v03 MOS52 0471 ED63 C9 0C CMPIM &0C ;check if note > one octave MOS52 0447 ED55 v03 MOS52 0472 ED65 90 07 BCC ENDOL MOS52 0447 ED55 v03 MOS52 0473 ED67 E9 0C SBCIM &0C MOS52 0447 ED55 v03 MOS52 0474 ED69 6E 3D 08 ROR PRDL ;use PRDL as octave counter for division MOS52 0447 ED55 v03 MOS52 0475 ED6C 30 F5 BMI OCTL ;branch always taken MOS52 0447 ED55 v03 MOS52 0476 ED6E ] MOS52 0447 ED55 v03 MOS52 0477 ED6E ENDOL MOS52 0447 ED55 v03 MOS52 0478 ED6E A8 TAY MOS52 0447 ED55 v03 MOS52 0479 ED6F AD 3D 08 LDA PRDL ;number octaves up MOS52 0447 ED55 v03 MOS52 0480 ED72 48 PHA MOS52 0447 ED55 v03 MOS52 0481 ED73 B9 34 EE LDAAY NTABL ;low period from table MOS52 0447 ED55 v03 MOS52 0482 ED76 8D 3D 08 STA PRDL MOS52 0447 ED55 v03 MOS52 0483 ED79 B9 40 EE LDAAY NTABH ;high period for lowest octave MOS52 0447 ED55 v03 MOS52 0484 ED7C 48 PHA MOS52 0447 ED55 v03 MOS52 0485 ED7D 29 03 ANDIM &03 MOS52 0447 ED55 v03 MOS52 0486 ED7F 8D 3E 08 STA PRDH MOS52 0447 ED55 v03 MOS52 0487 ED82 68 PLA ;get semitone difference from top bits of NTABH MOS52 0447 ED55 v03 MOS52 0488 ED83 4A LSRA MOS52 0447 ED55 v03 MOS52 0489 ED84 4A LSRA MOS52 0447 ED55 v03 MOS52 0490 ED85 4A LSRA MOS52 0447 ED55 v03 MOS52 0491 ED86 4A LSRA MOS52 0447 ED55 v03 MOS52 0492 ED87 8D 3F 08 STA NOTDIF MOS52 0447 ED55 v03 MOS52 0493 ED8A AD 3D 08 LDA PRDL MOS52 0447 ED55 v03 MOS52 0494 ED8D AC 3C 08 LDY FRACT ;number of times NOTDIF has to be added MOS52 0447 ED55 v03 MOS52 0495 ED90 F0 0C BEQ INTRPE ;[true semitone] MOS52 0447 ED55 v03 MOS52 0496 ED92 INTRPL MOS52 0447 ED55 v03 MOS52 0497 ED92 ;following subtracts NOTDIF from period MOS52 0447 ED55 v03 MOS52 0498 ED92 38 SEC MOS52 0447 ED55 v03 MOS52 0499 ED93 ED 3F 08 SBC NOTDIF MOS52 0447 ED55 v03 MOS52 0500 ED96 B0 03 BCS INTRPO MOS52 0447 ED55 v03 MOS52 0501 ED98 CE 3E 08 DEC PRDH MOS52 0447 ED55 v03 MOS52 0502 ED9B INTRPO MOS52 0447 ED55 v03 MOS52 0503 ED9B 88 DEY MOS52 0447 ED55 v03 MOS52 0504 ED9C D0 F4 BNE INTRPL ;[add another fraction] MOS52 0447 ED55 v03 MOS52 0505 ED9E INTRPE MOS52 0447 ED55 v03 MOS52 0506 ED9E 8D 3D 08 STA PRDL MOS52 0447 ED55 v03 MOS52 0507 EDA1 68 PLA MOS52 0447 ED55 v03 MOS52 0508 EDA2 [ MOS125 = &FF MOS52 0447 ED55 v03 MOS52 0516 EDA2 | MOS52 0447 ED55 v03 MOS52 0517 EDA2 10 09 BPL ODONE ;if lowest octave then no shifts MOS52 0447 ED55 v03 MOS52 0518 EDA4 SSHIFT MOS52 0447 ED55 v03 MOS52 0519 EDA4 4E 3E 08 LSR PRDH ;divide period by 2 MOS52 0447 ED55 v03 MOS52 0520 EDA7 6E 3D 08 ROR PRDL MOS52 0447 ED55 v03 MOS52 0521 EDAA 0A ASLA MOS52 0447 ED55 v03 MOS52 0522 EDAB 30 F7 BMI SSHIFT ;[up another octave] MOS52 0447 ED55 v03 MOS52 0523 EDAD ] MOS52 0447 ED55 v03 MOS52 0524 EDAD ODONE MOS52 0447 ED55 v03 MOS52 0525 EDAD AD 3D 08 LDA PRDL ;extract low four bits of period MOS52 0447 ED55 v03 MOS52 0526 EDB0 18 CLC MOS52 0447 ED55 v03 MOS52 0527 EDB1 7D 3D C4 ADCAX SCHOFF MOS52 0447 ED55 v03 MOS52 0528 EDB4 8D 3D 08 STA PRDL MOS52 0447 ED55 v03 MOS52 0529 EDB7 90 03 BCC NOFOV MOS52 0447 ED55 v03 MOS52 0530 EDB9 EE 3E 08 INC PRDH MOS52 0447 ED55 v03 MOS52 0531 EDBC NOFOV MOS52 0447 ED55 v03 MOS52 0532 EDBC 29 0F ANDIM &0F MOS52 0447 ED55 v03 MOS52 0533 EDBE 1D 96 EB ORAAX CHAN ;add channel address MOS52 0447 ED55 v03 MOS52 0534 EDC1 08 PHP MOS52 0447 ED55 v03 MOS52 0535 EDC2 78 SEI ;make sure another request does not mess up sequence MOS52 0447 ED55 v03 MOS52 0536 EDC3 20 7B EB JSR SEND ;output to chip MOS52 0447 ED55 v03 MOS52 0537 EDC6 AD 3D 08 LDA PRDL ;get next 6 bits of period MOS52 0447 ED55 v03 MOS52 0538 EDC9 4E 3E 08 LSR PRDH MOS52 0447 ED55 v03 MOS52 0539 EDCC 6A RORA MOS52 0447 ED55 v03 MOS52 0540 EDCD 4E 3E 08 LSR PRDH MOS52 0447 ED55 v03 MOS52 0541 EDD0 6A RORA MOS52 0447 ED55 v03 MOS52 0542 EDD1 4A LSRA ;transfer to low 6 bits of Acc MOS52 0447 ED55 v03 MOS52 0543 EDD2 4A LSRA MOS52 0447 ED55 v03 MOS52 0544 EDD3 CDONE MOS52 0447 ED55 v03 MOS52 0545 EDD3 4C 7C EB JMP SENDX ;output period to chip -- MOS52 0546 EDD6 ;routine to start note at head of queue -- MOS52 0547 EDD6 STRNT -- MOS52 0548 EDD6 08 PHP ;start indivisible section to stop new -- MOS52 0549 EDD7 78 SEI ;note being added to queue half way through extraction -- MOS52 0550 EDD8 20 D8 E4 JSR REMOV ;get byte at head queue -- MOS52 0551 EDDB [ MOS125 = &FF -- MOS52 0558 EDDB | -- MOS52 0559 EDDB A8 TAY ;save byte at head queue -- MOS52 0560 EDDC 29 04 ANDIM &04 ;extract 'continue' bit -- MOS52 0561 EDDE F0 12 BEQ NOCONT ;[not continue] MOS52 0561 EDDE v6D MOS52 0562 EDE0 BC 20 08 LDYAX ENVLP ;must check for continue to auto envelope MOS52 0561 EDDE v6D MOS52 0563 EDE3 C8 INY MOS52 0561 EDDE v6D MOS52 0564 EDE4 ] MOS52 0561 EDDE v6D MOS52 0565 EDE4 D0 03 BNE SCON1 MOS52 MOS52 MOS52 MOS52 Acorn macro assembler Page 112 MOS52 MOS52 Sound generator MOS52 MOS52 0561 EDDE v6D MOS52 0566 EDE6 20 60 EB JSR MINATN ;update attenuation MOS52 0561 EDDE v6D MOS52 0567 EDE9 SCON1 MOS52 0561 EDDE v6D MOS52 0568 EDE9 20 D8 E4 JSR REMOV ;throw away note MOS52 0561 EDDE v6D MOS52 0569 EDEC 20 D8 E4 JSR REMOV ;get duration MOS52 0561 EDDE v6D MOS52 0570 EDEF 28 PLP ;end of indivisible section MOS52 0561 EDDE v6D MOS52 0571 EDF0 [ MOS125 = &FF MOS52 0561 EDDE v6D MOS52 0575 EDF0 | MOS52 0561 EDDE v6D MOS52 0576 EDF0 90 3E BCC DODUR ;C=0 from NNWAT->STRNT; always branch to update duration MOS52 0576 EDF0 v41 MOS52 0577 EDF2 NOCONT MOS52 0576 EDF0 v41 MOS52 0578 EDF2 98 TYA ;restore header byte MOS52 0576 EDF0 v41 MOS52 0579 EDF3 ] MOS52 0576 EDF0 v41 MOS52 0580 EDF3 29 F8 ANDIM &F8 ;extract 5 envelope bits MOS52 0576 EDF0 v41 MOS52 0581 EDF5 0A ASLA ;programmable envelope select bit >carry MOS52 0576 EDF0 v41 MOS52 0582 EDF6 90 0A BCC PENV ;[programmed envelope] MOS52 0576 EDF0 v41 MOS52 0583 EDF8 [ MOS125 = &FF MOS52 0576 EDF0 v41 MOS52 0588 EDF8 | MOS52 0576 EDF0 v41 MOS52 0589 EDF8 ; in: ~b3 ~b2 ~b1 ~b0 0 0 0 x MOS52 0576 EDF0 v41 MOS52 0590 EDF8 ;out: ~b3 ~b3 b2 b1 b0 1 1 1 MOS52 0576 EDF0 v41 MOS52 0591 EDF8 C9 80 CMPIM &80 ;convert box envelope to signed amplitude MOS52 0576 EDF0 v41 MOS52 0592 EDFA 6A RORA MOS52 0576 EDF0 v41 MOS52 0593 EDFB 49 3F EORIM &3F MOS52 0576 EDF0 v41 MOS52 0594 EDFD ] MOS52 0576 EDF0 v41 MOS52 0595 EDFD 20 67 EB JSR UPATN MOS52 0576 EDF0 v41 MOS52 0596 EE00 A9 FF LDAIM &FF ;flag box envelope by setting top bit of ENVLP MOS52 0576 EDF0 v41 MOS52 0597 EE02 PENV MOS52 0576 EDF0 v41 MOS52 0598 EE02 9D 20 08 STAAX ENVLP ;envelope pointer,envelope*16 MOS52 0576 EDF0 v41 MOS52 0599 EE05 A9 05 LDAIM &05 ;start timing first 1/20th second from now MOS52 0576 EDF0 v41 MOS52 0600 EE07 9D 1C 08 STAAX DRDIV MOS52 0576 EDF0 v41 MOS52 0601 EE0A A9 01 LDAIM &01 MOS52 0576 EDF0 v41 MOS52 0602 EE0C 9D 24 08 STAAX SCONT ;first envelope update next tick MOS52 0576 EDF0 v41 MOS52 0603 EE0F [ MOS125 = &FF MOS52 0576 EDF0 v41 MOS52 0605 EE0F | MOS52 0576 EDF0 v41 MOS52 0606 EE0F 4A LSRA MOS52 0576 EDF0 v41 MOS52 0607 EE10 ] MOS52 0576 EDF0 v41 MOS52 0608 EE10 9D 14 08 STAAX NCONT MOS52 0576 EDF0 v41 MOS52 0609 EE13 9D 08 08 STAAX EPERD ;first amplittude envelope MOS52 0576 EDF0 v41 MOS52 0610 EE16 9D 30 08 STAAX NTADD ;note add envelope starts at 0 MOS52 0576 EDF0 v41 MOS52 0611 EE19 A9 FF LDAIM &FF MOS52 0576 EDF0 v41 MOS52 0612 EE1B 9D 10 08 STAAX NPERD ;set frequency envelope to -1,incremented on first tick MOS52 0576 EDF0 v41 MOS52 0613 EE1E 20 D8 E4 JSR REMOV ;extract note byte from queue MOS52 0576 EDF0 v41 MOS52 0614 EE21 9D 0C 08 STAAX SNOTE ;store note MOS52 0576 EDF0 v41 MOS52 0615 EE24 20 D8 E4 JSR REMOV ;Remove duration MOS52 0576 EDF0 v41 MOS52 0616 EE27 28 PLP ;end of indivisible section MOS52 0576 EDF0 v41 MOS52 0617 EE28 48 PHA ;remember duration MOS52 0576 EDF0 v41 MOS52 0618 EE29 BD 0C 08 LDAAX SNOTE MOS52 0576 EDF0 v41 MOS52 0619 EE2C 20 43 ED JSR CNVRT ;convert to period and output MOS52 0576 EDF0 v41 MOS52 0620 EE2F 68 PLA ;get duration back MOS52 0576 EDF0 v41 MOS52 0621 EE30 DODUR MOS52 0576 EDF0 v41 MOS52 0622 EE30 9D 18 08 STAAX DUR ;set up duration -- MOS52 0623 EE33 60 RTS -- MOS52 0624 EE34 [ MOS125 = &FF -- MOS52 0625 EE34 | -- MOS52 0626 EE34 ;NB swapping JSR CNVRT and STAAX DUR (to save PHA/PLA) -- MOS52 0627 EE34 ;would cause an interrupt occurring during CNVRT to decrement -- MOS52 0628 EE34 ;the new count instead of the old. Preserving current order. -- MOS52 0629 EE34 ] -- MOS52 0630 EE34 -- MOS52 0631 EE34 -- MOS52 0632 EE34 NTABL ;lookup table for low 8 bit of period -- MOS52 0633 EE34 F0 = &F0 -- MOS52 0634 EE35 B7 = &B7 -- MOS52 0635 EE36 82 = &82 -- MOS52 0636 EE37 4F = &4F -- MOS52 0637 EE38 20 = &20 -- MOS52 0638 EE39 F3 = &F3 -- MOS52 0639 EE3A C8 = &C8 -- MOS52 0640 EE3B A0 = &A0 -- MOS52 0641 EE3C 7B = &7B -- MOS52 0642 EE3D 57 = &57 -- MOS52 0643 EE3E 35 = &35 -- MOS52 0644 EE3F 16 = &16 -- MOS52 0645 EE40 NTABH ;lookup table for high 2 bits of period -- MOS52 0646 EE40 E7 = &E7 ;and 6 bits of note difference being the difference -- MOS52 0647 EE41 D7 = &D7 ;between this and the next note -- MOS52 0648 EE42 CB = &CB -- MOS52 0649 EE43 C3 = &C3 -- MOS52 0650 EE44 B7 = &B7 -- MOS52 0651 EE45 AA = &AA -- MOS52 0652 EE46 A2 = &A2 -- MOS52 0653 EE47 9A = &9A -- MOS52 0654 EE48 92 = &92 -- MOS52 0655 EE49 8A = &8A -- MOS52 0656 EE4A 82 = &82 -- MOS52 0657 EE4B 7A = &7A -- MOS52 0658 EE4C -- MOS52 0659 EE4C -- MOS52 0660 EE4C LNK MOS54 -- MOS54 0001 EE4C ; MOS54 -- MOS54 0002 EE4C TTL MOS54 SPEECH DRIVING -- MOS54 0003 EE4C OPT MOS54 MOS54 MOS54 MOS54 MOS54 Acorn macro assembler Page 113 MOS54 MOS54 SPEECH DRIVING MOS54 -- MOS54 0004 EE4C ;(c) 1981 ACORN Computers Limited -- MOS54 0005 EE4C ;BBC Microcomputer Machine Operating System (MOS) -- MOS54 0006 EE4C ;Change record: -- MOS54 0007 EE4C ;004 07-Nov-81 PBM Prototype version -- MOS54 0008 EE4C ;Author(s): -- MOS54 0009 EE4C ;Paul Bond -- MOS54 0010 EE4C -- MOS54 0011 EE4C -- MOS54 0012 EE4C SRINIT ;initialise SEROM environment for CFS -- MOS54 0013 EE4C [ NOSP = &00 -- MOS54 0016 EE4C | -- MOS54 0017 EE4C A9 EF LDAIM &F0-&01 ;$01 adjusts for future INC SEROM -- MOS54 0018 EE4E ] -- MOS54 0019 EE4E ; SEROM will cycle $F0 ... $FF ... $00 ... $10 (max) -- MOS54 0020 EE4E 85 F5 STA SEROM -- MOS54 0021 EE50 [ MOS125 = &FF -- MOS54 0023 EE50 ] -- MOS54 0024 EE50 -- MOS54 0025 EE50 -- MOS54 0026 EE50 SRNEXT ;move on to next SEROM -- MOS54 0027 EE50 ; -- MOS54 0028 EE50 ; scans phrase ROM first, then paged ROM -- MOS54 0029 EE50 ; -- MOS54 0030 EE50 SPCPYF ;entry point from failed copyright message test -- MOS54 0031 EE50 A2 0D LDXIM SVISFS MOS54 0071 EE6F ^5F MOS54 0032 EE52 E6 F5 INC SEROM MOS54 0071 EE6F ^5F MOS54 0033 EE54 A4 F5 LDY SEROM MOS54 0071 EE6F ^5F MOS54 0034 EE56 [ NOSP = &00 MOS54 0071 EE6F ^5F MOS54 0039 EE56 | MOS54 0071 EE6F ^5F MOS54 0040 EE56 [ MOS125 = &7F MOS54 0071 EE6F ^5F MOS54 0041 EE56 30 05 BMI SPPH ;[process PHROM, V not altered] MOS54 0071 EE6F ^5F MOS54 0042 EE58 C0 10 CPYIM NROM ;if we get here with SEROM >= NROM, MOS54 0071 EE6F ^5F MOS54 0043 EE5A 90 39 BCC SPSV ;then no paged ROM is to respond MOS54 0043 EE5A v46 MOS54 0044 EE5C 60 RTS ;so exit C=1, call unclaimed MOS54 0043 EE5A v46 MOS54 0045 EE5D SPPH MOS54 0043 EE5A v46 MOS54 0046 EE5D | MOS54 0043 EE5A v46 MOS54 0048 EE5D ] MOS54 0043 EE5A v46 MOS54 0049 EE5D ; MOS54 0043 EE5A v46 MOS54 0050 EE5D ; process PHROM, V not altered MOS54 0043 EE5A v46 MOS54 0051 EE5D ; MOS54 0043 EE5A v46 MOS54 0052 EE5D ; no need to check for speech chip present MOS54 0043 EE5A v46 MOS54 0053 EE5D ; reads from chip will not indicate copyright message MOS54 0043 EE5A v46 MOS54 0054 EE5D ; MOS54 0043 EE5A v46 MOS54 0055 EE5D ; check for existence of speech SEROM MOS54 0043 EE5A v46 MOS54 0056 EE5D ; MOS54 0043 EE5A v46 MOS54 0057 EE5D ; set pointer to 1 MOS54 0043 EE5A v46 MOS54 0058 EE5D ; MOS54 0043 EE5A v46 MOS54 0059 EE5D A2 00 LDXIM ZERO MOS54 0043 EE5A v46 MOS54 0060 EE5F 86 F7 STX ROMPTR+&01 MOS54 0043 EE5A v46 MOS54 0061 EE61 E8 INX ;X := 1 MOS54 0043 EE5A v46 MOS54 0062 EE62 86 F6 STX ROMPTR+&00 MOS54 0043 EE5A v46 MOS54 0063 EE64 20 F7 EE JSR SPLOAD ;set address MOS54 0043 EE5A v46 MOS54 0064 EE67 ; MOS54 0043 EE5A v46 MOS54 0065 EE67 ; check for copyright (C) MOS54 0043 EE5A v46 MOS54 0066 EE67 ; MOS54 0043 EE5A v46 MOS54 0067 EE67 A2 03 LDXIM &03 MOS54 0043 EE5A v46 MOS54 0068 EE69 SPCPY ;V not altered MOS54 0043 EE5A v46 MOS54 0069 EE69 20 9E EE JSR RDBYTE ;does not alter X MOS54 0043 EE5A v46 MOS54 0070 EE6C DD 23 F5 CMPAX COPYR MOS54 0043 EE5A v46 MOS54 0071 EE6F D0 DF BNE SPCPYF ;[failed test for copyright message] MOS54 0043 EE5A v46 MOS54 0072 EE71 ; C=1 MOS54 0043 EE5A v46 MOS54 0073 EE71 CA DEX MOS54 0043 EE5A v46 MOS54 0074 EE72 10 F5 BPL SPCPY MOS54 0043 EE5A v46 MOS54 0075 EE74 ; MOS54 0043 EE5A v46 MOS54 0076 EE74 ; C=1 MOS54 0043 EE5A v46 MOS54 0077 EE74 ; MOS54 0043 EE5A v46 MOS54 0078 EE74 ; copyright message is present MOS54 0043 EE5A v46 MOS54 0079 EE74 ; MOS54 0043 EE5A v46 MOS54 0080 EE74 ; we have read 5 bytes so far MOS54 0043 EE5A v46 MOS54 0081 EE74 ; skip more bytes allowing for copyright/title strings MOS54 0043 EE5A v46 MOS54 0082 EE74 ; MOS54 0043 EE5A v46 MOS54 0083 EE74 ; position serial ROM to cassette image data MOS54 0043 EE5A v46 MOS54 0084 EE74 ; (indirect pointer held at offset $3E) MOS54 0043 EE5A v46 MOS54 0085 EE74 ; MOS54 0043 EE5A v46 MOS54 0086 EE74 A9 3E LDAIM &3E MOS54 0043 EE5A v46 MOS54 0087 EE76 85 F6 STA ROMPTR+&00 MOS54 0043 EE5A v46 MOS54 0088 EE78 ; MOS54 0043 EE5A v46 MOS54 0089 EE78 ; C=1 MOS54 0043 EE5A v46 MOS54 0090 EE78 ; MOS54 0043 EE5A v46 MOS54 0091 EE78 SPLIND ;load address indirect, V not altered, returns C=0 MOS54 0043 EE5A v46 MOS54 0092 EE78 20 F7 EE JSR SPLOAD MOS54 0043 EE5A v46 MOS54 0093 EE7B [ TRUE=0 MOS54 0043 EE5A v46 MOS54 0094 EE7B ; perform soft version of read-and-branch MOS54 0043 EE5A v46 MOS54 0095 EE7B ; MOS54 0043 EE5A v46 MOS54 0096 EE7B A2 FF LDXIM &FF MOS54 0043 EE5A v46 MOS54 0097 EE7D RABLP MOS54 0043 EE5A v46 MOS54 0098 EE7D ; read lo byte when X=0, hi byte when X=1 MOS54 0043 EE5A v46 MOS54 0099 EE7D 20 9E EE JSR RDBYTE ;does not corrupt X MOS54 0043 EE5A v46 MOS54 0100 EE80 ; MOS54 0043 EE5A v46 MOS54 0101 EE80 [ MOS125 = &FF MOS54 0043 EE5A v46 MOS54 0108 EE80 | MOS54 0043 EE5A v46 MOS54 0109 EE80 38 SEC ;C undefined if entered at SPLIND MOS54 0043 EE5A v46 MOS54 0110 EE81 2A ROLA MOS54 0043 EE5A v46 MOS54 0111 EE82 RABLO ;reverse bits in A into ROMPTR+(0/1) MOS54 0043 EE5A v46 MOS54 0112 EE82 76 F7 RORAX ROMPTR+&01 MOS54 0043 EE5A v46 MOS54 0113 EE84 0A ASLA MOS54 0043 EE5A v46 MOS54 0114 EE85 D0 FB BNE RABLO ;[process 8 bits] MOS54 0043 EE5A v46 MOS54 0115 EE87 ; C=1, Y clobbered in SPLOAD->SPL->SPL1 MOS54 0043 EE5A v46 MOS54 0116 EE87 ] MOS54 0043 EE5A v46 MOS54 0117 EE87 ; MOS54 0043 EE5A v46 MOS54 0118 EE87 E8 INX MOS54 0043 EE5A v46 MOS54 0119 EE88 F0 F3 BEQ RABLP ;repeat loop once more with X=0 MOS54 0043 EE5A v46 MOS54 0120 EE8A ; MOS54 0043 EE5A v46 MOS54 0121 EE8A 18 CLC ;indicate next successful MOS54 0043 EE5A v46 MOS54 0122 EE8B 90 6A BCC SPLOAD ;[ALWAYS jump, set indirected address AND return] MOS54 0122 EE8B v15 MOS54 0123 EE8D | MOS54 0122 EE8B v15 MOS54 0136 EE8D ] MOS54 0122 EE8B v15 MOS54 0137 EE8D ] MOS54 0122 EE8B v15 MOS54 0138 EE8D MOS54 0122 EE8B v15 MOS54 0139 EE8D MOS54 0122 EE8B v15 MOS54 0140 EE8D RDSPCH ;read byte from SEROM MOS54 0122 EE8B v15 MOS54 0141 EE8D A2 0E LDXIM SVRSFS MOS54 0122 EE8B v15 MOS54 0142 EE8F [ NOSP = &00 MOS54 0122 EE8B v15 MOS54 0144 EE8F | MOS54 0122 EE8B v15 MOS54 0145 EE8F A4 F5 LDY SEROM MOS54 0122 EE8B v15 MOS54 0146 EE91 30 0B BMI RDBYTE ;[reading from PHROM, V not altered] MOS54 0122 EE8B v15 MOS54 0147 EE93 ] MOS54 0122 EE8B v15 MOS54 0148 EE93 ; MOS54 0122 EE8B v15 MOS54 0149 EE93 ; reading from paged ROM MOS54 0122 EE8B v15 MOS54 0150 EE93 ; MOS54 0122 EE8B v15 MOS54 0151 EE93 A0 FF LDYIM 0-MCVER ;enter paged ROM with M/C indicator in Y MOS54 MOS54 MOS54 MOS54 Acorn macro assembler Page 114 MOS54 MOS54 SPEECH DRIVING MOS54 MOS54 0122 EE8B v15 MOS54 0152 EE95 ; MOS54 0122 EE8B v15 MOS54 0153 EE95 SPSV ;used by read byte routine, V not altered MOS54 0122 EE8B v15 MOS54 0154 EE95 08 PHP MOS54 0122 EE8B v15 MOS54 0155 EE96 20 71 F1 JSR SVOP ;search for paged SEROM (N.B. SVOPSP) MOS54 0122 EE8B v15 MOS54 0156 EE99 ; MOS54 0122 EE8B v15 MOS54 0157 EE99 28 PLP ;restore V-flag MOS54 0122 EE8B v15 MOS54 0158 EE9A C9 01 CMPIM &01 ;claimed => C=0, not claimed => C=1 MOS54 0122 EE8B v15 MOS54 0159 EE9C 98 TYA ;A := read character (useful for read byte routine only) MOS54 0122 EE8B v15 MOS54 0160 EE9D 60 RTS MOS54 0122 EE8B v15 MOS54 0161 EE9E MOS54 0122 EE8B v15 MOS54 0162 EE9E MOS54 0122 EE8B v15 MOS54 0163 EE9E [ NOSP = &00 MOS54 0122 EE8B v15 MOS54 0166 EE9E | MOS54 0122 EE8B v15 MOS54 0167 EE9E RDBYTE ;read byte from speech ROM, V not altered MOS54 0122 EE8B v15 MOS54 0168 EE9E 08 PHP MOS54 0122 EE8B v15 MOS54 0169 EE9F 78 SEI MOS54 0122 EE8B v15 MOS54 0170 EEA0 A0 10 LDYIM SPOPRB ;set to read byte MOS54 0122 EE8B v15 MOS54 0171 EEA2 20 BB EE JSR WSPECH MOS54 0122 EE8B v15 MOS54 0172 EEA5 ; read byte (following code shorter than JSR RSPECH; PLP; RTS) MOS54 0122 EE8B v15 MOS54 0173 EEA5 A0 00 LDYIM ZERO MOS54 0122 EE8B v15 MOS54 0174 EEA7 F0 17 BEQ SENDSX ;[ALWAYS JUMP, N.B. does PLP & RTS, SEI already active] MOS54 0122 EE8B v15 MOS54 0175 EEA9 MOS54 0122 EE8B v15 MOS54 0176 EEA9 MOS54 0122 EE8B v15 MOS54 0177 EEA9 RSPECH ;read from speech processor, must not corrupt X MOS54 0122 EE8B v15 MOS54 0178 EEA9 A0 00 LDYIM ZERO MOS54 0122 EE8B v15 MOS54 0179 EEAB F0 11 BEQ SENDSP ;[ALWAYS jump] MOS54 0122 EE8B v15 MOS54 0180 EEAD ; MOS54 0122 EE8B v15 MOS54 0181 EEAD ; MOS54 0122 EE8B v15 MOS54 0182 EEAD SPL ;send load address nibbles MOS54 0122 EE8B v15 MOS54 0183 EEAD ; A = hl MOS54 0122 EE8B v15 MOS54 0184 EEAD ; h is hi-nibble MOS54 0122 EE8B v15 MOS54 0185 EEAD ; l is lo-nibble MOS54 0122 EE8B v15 MOS54 0186 EEAD 48 PHA MOS54 0122 EE8B v15 MOS54 0187 EEAE 20 B6 EE JSR SPL1 ;send lo-nibble MOS54 0122 EE8B v15 MOS54 0188 EEB1 68 PLA MOS54 0122 EE8B v15 MOS54 0189 EEB2 6A RORA MOS54 0122 EE8B v15 MOS54 0190 EEB3 6A RORA MOS54 0122 EE8B v15 MOS54 0191 EEB4 6A RORA MOS54 0122 EE8B v15 MOS54 0192 EEB5 6A RORA MOS54 0122 EE8B v15 MOS54 0193 EEB6 ; MOS54 0122 EE8B v15 MOS54 0194 EEB6 ; send hi-nibble MOS54 0122 EE8B v15 MOS54 0195 EEB6 ; MOS54 0122 EE8B v15 MOS54 0196 EEB6 SPL1 MOS54 0122 EE8B v15 MOS54 0197 EEB6 29 0F ANDIM &0F ;isolate lo-nibble MOS54 0122 EE8B v15 MOS54 0198 EEB8 09 40 ORAIM SPOPLA MOS54 0122 EE8B v15 MOS54 0199 EEBA ; MOS54 0122 EE8B v15 MOS54 0200 EEBA A8 TAY ;Y := command MOS54 0122 EE8B v15 MOS54 0201 EEBB ; MOS54 0122 EE8B v15 MOS54 0202 EEBB WSPECH ;write to speech processor, must not corrupt X MOS54 0122 EE8B v15 MOS54 0203 EEBB 98 TYA ;A := command MOS54 0122 EE8B v15 MOS54 0204 EEBC A0 01 LDYIM &01 MOS54 0122 EE8B v15 MOS54 0205 EEBE ; MOS54 0122 EE8B v15 MOS54 0206 EEBE SENDSP ;read/write from/to speech processor MOS54 0122 EE8B v15 MOS54 0207 EEBE ; Y=0 => read MOS54 0122 EE8B v15 MOS54 0208 EEBE ; Y=1 => write MOS54 0122 EE8B v15 MOS54 0209 EEBE 08 PHP MOS54 0122 EE8B v15 MOS54 0210 EEBF 78 SEI MOS54 0122 EE8B v15 MOS54 0211 EEC0 SENDSX ;entry used by routines which have done a PHP & SEI MOS54 0122 EE8B v15 MOS54 0212 EEC0 2C 7B 02 BIT SPFLAG MOS54 0122 EE8B v15 MOS54 0213 EEC3 10 21 BPL SNDSX0 ;[speech chip not present] MOS54 0122 EE8B v15 MOS54 0214 EEC5 ; MOS54 0122 EE8B v15 MOS54 0215 EEC5 48 PHA ;save command MOS54 0122 EE8B v15 MOS54 0216 EEC6 ; MOS54 0122 EE8B v15 MOS54 0217 EEC6 ; select PA7-0 as inputs/outputs MOS54 0122 EE8B v15 MOS54 0218 EEC6 ; MOS54 0122 EE8B v15 MOS54 0219 EEC6 B9 A4 F0 LDAAY SENDD MOS54 0122 EE8B v15 MOS54 0220 EEC9 8D 43 FE STA DDRAQ MOS54 0122 EE8B v15 MOS54 0221 EECC ; MOS54 0122 EE8B v15 MOS54 0222 EECC ; place command onto data bus MOS54 0122 EE8B v15 MOS54 0223 EECC ; MOS54 0122 EE8B v15 MOS54 0224 EECC 68 PLA ;restore command MOS54 0122 EE8B v15 MOS54 0225 EECD 8D 4F FE STA PAPQ MOS54 0122 EE8B v15 MOS54 0226 EED0 ; MOS54 0122 EE8B v15 MOS54 0227 EED0 ; speech enable MOS54 0122 EE8B v15 MOS54 0228 EED0 ; MOS54 0122 EE8B v15 MOS54 0229 EED0 B9 A6 F0 LDAAY SENDS MOS54 0122 EE8B v15 MOS54 0230 EED3 8D 40 FE STA PBQ MOS54 0122 EE8B v15 MOS54 0231 EED6 ; MOS54 0122 EE8B v15 MOS54 0232 EED6 ; wait for speech ready MOS54 0122 EE8B v15 MOS54 0233 EED6 ; MOS54 0122 EE8B v15 MOS54 0234 EED6 SPWAIT MOS54 0122 EE8B v15 MOS54 0235 EED6 2C 40 FE BIT PBQ MOS54 0122 EE8B v15 MOS54 0236 EED9 30 FB BMI SPWAIT ;[not ready] MOS54 0122 EE8B v15 MOS54 0237 EEDB ; MOS54 0122 EE8B v15 MOS54 0238 EEDB ; read possible speech data MOS54 0122 EE8B v15 MOS54 0239 EEDB ; MOS54 0122 EE8B v15 MOS54 0240 EEDB AD 4F FE LDA PAPQ MOS54 0122 EE8B v15 MOS54 0241 EEDE 48 PHA MOS54 0122 EE8B v15 MOS54 0242 EEDF ; MOS54 0122 EE8B v15 MOS54 0243 EEDF ; speech disable MOS54 0122 EE8B v15 MOS54 0244 EEDF ; MOS54 0122 EE8B v15 MOS54 0245 EEDF B9 A8 F0 LDAAY SENDF MOS54 0122 EE8B v15 MOS54 0246 EEE2 8D 40 FE STA PBQ MOS54 0122 EE8B v15 MOS54 0247 EEE5 ; MOS54 0122 EE8B v15 MOS54 0248 EEE5 ; return MOS54 0122 EE8B v15 MOS54 0249 EEE5 ; MOS54 0122 EE8B v15 MOS54 0250 EEE5 68 PLA ;restore speech data (not relevant if write) MOS54 0122 EE8B v15 MOS54 0251 EEE6 ; MOS54 0122 EE8B v15 MOS54 0252 EEE6 SNDSX0 MOS54 0122 EE8B v15 MOS54 0253 EEE6 28 PLP MOS54 0122 EE8B v15 MOS54 0254 EEE7 A8 TAY ;set processor status flags (useful for RSPECH) and Y (for FX calls) MOS54 0122 EE8B v15 MOS54 0255 EEE8 60 RTS MOS54 0122 EE8B v15 MOS54 0256 EEE9 ] MOS54 0122 EE8B v15 MOS54 0257 EEE9 MOS54 0122 EE8B v15 MOS54 0258 EEE9 MOS54 0122 EE8B v15 MOS54 0259 EEE9 SRSKIP ;skip to SEROM pointer indicated by SRPTR MOS54 0122 EE8B v15 MOS54 0260 EEE9 AD CB 03 LDA SRPTR+&00 MOS54 0122 EE8B v15 MOS54 0261 EEEC 85 F6 STA ROMPTR+&00 MOS54 0122 EE8B v15 MOS54 0262 EEEE AD CC 03 LDA SRPTR+&01 MOS54 0122 EE8B v15 MOS54 0263 EEF1 85 F7 STA ROMPTR+&01 MOS54 0122 EE8B v15 MOS54 0264 EEF3 [ NOSP = &00 MOS54 0122 EE8B v15 MOS54 0265 EEF3 | MOS54 0122 EE8B v15 MOS54 0266 EEF3 A5 F5 LDA SEROM MOS54 0122 EE8B v15 MOS54 0267 EEF5 10 1B BPL SRSK0 ;[skipping within paged ROM] MOS54 0122 EE8B v15 MOS54 0268 EEF7 ; MOS54 0122 EE8B v15 MOS54 0269 EEF7 ; skipping within speech SEROM MOS54 0122 EE8B v15 MOS54 0270 EEF7 ; load address from SEROM/ROMPTR MOS54 0122 EE8B v15 MOS54 0271 EEF7 ; MOS54 0122 EE8B v15 MOS54 0272 EEF7 SPLOAD ;load address, must not corrupt V MOS54 0122 EE8B v15 MOS54 0273 EEF7 ; address given in SEROM/ROMPTR MOS54 0122 EE8B v15 MOS54 0274 EEF7 08 PHP MOS54 MOS54 MOS54 MOS54 Acorn macro assembler Page 115 MOS54 MOS54 SPEECH DRIVING MOS54 MOS54 0267 EEF5 v64 MOS54 0275 EEF8 78 SEI ;N.B. uses SPWK1 MOS54 0267 EEF5 v64 MOS54 0276 EEF9 A5 F6 LDA ROMPTR+&00 MOS54 0267 EEF5 v64 MOS54 0277 EEFB 20 AD EE JSR SPL ;send address lo-byte MOS54 0267 EEF5 v64 MOS54 0278 EEFE [ MOS125 = &FF MOS54 0267 EEF5 v64 MOS54 0291 EEFE | MOS54 0267 EEF5 v64 MOS54 0292 EEFE A5 F5 LDA SEROM MOS54 0267 EEF5 v64 MOS54 0293 EF00 4A LSRA MOS54 0267 EEF5 v64 MOS54 0294 EF01 6A RORA MOS54 0267 EEF5 v64 MOS54 0295 EF02 48 PHA MOS54 0267 EEF5 v64 MOS54 0296 EF03 6A RORA MOS54 0267 EEF5 v64 MOS54 0297 EF04 45 F7 EOR ROMPTR+&01 MOS54 0267 EEF5 v64 MOS54 0298 EF06 29 C0 ANDIM &C0 MOS54 0267 EEF5 v64 MOS54 0299 EF08 45 F7 EOR ROMPTR+&01 MOS54 0267 EEF5 v64 MOS54 0300 EF0A 20 AD EE JSR SPL ;send address hi-byte MOS54 0267 EEF5 v64 MOS54 0301 EF0D 68 PLA MOS54 0267 EEF5 v64 MOS54 0302 EF0E 20 B6 EE JSR SPL1 ;send address hi-nibble MOS54 0267 EEF5 v64 MOS54 0303 EF11 ] MOS54 0267 EEF5 v64 MOS54 0304 EF11 28 PLP MOS54 0267 EEF5 v64 MOS54 0305 EF12 SRSK0 MOS54 0267 EEF5 v64 MOS54 0306 EF12 ] MOS54 0267 EEF5 v64 MOS54 0307 EF12 60 RTS -- MOS54 0308 EF13 -- MOS54 0309 EF13 -- MOS54 0310 EF13 [ FALSE=0 -- MOS54 0323 EF13 ] -- MOS54 0324 EF13 -- MOS54 0325 EF13 -- MOS54 0326 EF13 < &0001 -- MOS54 0327 EF13 -- MOS54 0328 EF13 -- MOS54 0329 EF13 LNK MOS56 -- MOS56 0001 EF13 -- MOS56 0002 EF13 ; > MOS56 -- MOS56 0003 EF13 TTL MOS56 Keyboard management -- MOS56 0004 EF13 OPT MOS56 MOS56 MOS56 MOS56 MOS56 Acorn macro assembler Page 116 MOS56 MOS56 Keyboard management MOS56 -- MOS56 0005 EF13 ;(c) 1981 ACORN Computers Limited -- MOS56 0006 EF13 ;BBC Microcomputer Machine Operating System (MOS) -- MOS56 0007 EF13 ;Change record: -- MOS56 0008 EF13 ;202 01-May-82 PB Programmable TAB key -- MOS56 0009 EF13 ;.05 16-Nov-81 PB Fix CTRL/SHIFT matrix h/w problem -- MOS56 0010 EF13 ;100 04-Sep-81 PB Remove SHIFT and CTRL debounce -- MOS56 0011 EF13 ;Author(s): -- MOS56 0012 EF13 ;PB Paul Bond -- MOS56 0013 EF13 ;MP Mike Prees -- MOS56 0014 EF13 ; STATUS BYTE USES (KSTAT) -- MOS56 0015 EF13 ; N.B. status byte is NEVER zero -- MOS56 0016 EF13 ; (CAPITALS and SHIFT lock never concurrent) -- MOS56 0017 EF13 ; BIT 0 not used -- MOS56 0018 EF13 ; BIT 1 not used -- MOS56 0019 EF13 ; BIT 2 not used -- MOS56 0020 EF13 ; BIT 3 SHIFT -- MOS56 0021 EF13 ; BIT 4 not CAPITALS lock -- MOS56 0022 EF13 ; BIT 5 not SHIFT lock -- MOS56 0023 EF13 ; BIT 6 CTRL -- MOS56 0024 EF13 ; BIT 7 shift enable (only meaningful if a lock is active) -- MOS56 0025 EF13 ; SEQUENCE OF EVENTS :- -- MOS56 0026 EF13 ; 1. CHECK SHIFT KEY -- MOS56 0027 EF13 ; 2. CHECK CONTROL KEY -- MOS56 0028 EF13 ; 3. PROCESS CURRENT KEY -- MOS56 0029 EF13 ; 4. PROCESS OLD KEY -- MOS56 0030 EF13 ; 5. SCAN KEYS IF REQ'D -- MOS56 0031 EF13 ; 6. ENABLE CA2 IF REQ'D -- MOS56 0032 EF13 -- MOS56 0033 EF13 -- MOS56 0034 EF13 KBDAW -- MOS56 0035 EF13 A2 FF LDXIM &FF ;prepare to enable keyboard timer interrupts -- MOS56 0036 EF15 ; -- MOS56 0037 EF15 ; IF ALL KEYS UP & FORGOTTEN, RESTORE INTERRUPTS -- MOS56 0038 EF15 ; -- MOS56 0039 EF15 A5 EC LDA CKEY -- MOS56 0040 EF17 05 ED ORA OKEY -- MOS56 0041 EF19 D0 06 BNE KBDISX ;[at least one active key, so keep keyboard interrupt disabled] MOS56 0041 EF19 v79 MOS56 0042 EF1B ; MOS56 0041 EF19 v79 MOS56 0043 EF1B ; enable keyboard interrupt MOS56 0041 EF19 v79 MOS56 0044 EF1B ; MOS56 0041 EF19 v79 MOS56 0045 EF1B A9 81 LDAIM &81 MOS56 0041 EF19 v79 MOS56 0046 EF1D 8D 4E FE STA IERQ MOS56 0041 EF19 v79 MOS56 0047 EF20 E8 INX ;X:=0, disable keyboard timer interrupts MOS56 0041 EF19 v79 MOS56 0048 EF21 ; MOS56 0041 EF19 v79 MOS56 0049 EF21 KBDISX MOS56 0041 EF19 v79 MOS56 0050 EF21 8E 42 02 STX KSEMA ;set keyboard timer interrupt control flag -- MOS56 0051 EF24 ; $00 => disabled, $FF => enabled -- MOS56 0052 EF24 ; -- MOS56 0053 EF24 KBDIS -- MOS56 0054 EF24 08 PHP MOS56 0127 EF67 ^3B MOS56 0055 EF25 ; disable keyboard, coping with CAPITALS & SHIFT lock LEDs MOS56 0127 EF67 ^3B MOS56 0056 EF25 AD 5A 02 LDA KSTAT MOS56 0127 EF67 ^3B MOS56 0057 EF28 ; isolate CAPITALS lock and SHIFT lock states MOS56 0127 EF67 ^3B MOS56 0058 EF28 4A LSRA MOS56 0127 EF67 ^3B MOS56 0059 EF29 29 18 ANDIM &18 MOS56 0127 EF67 ^3B MOS56 0060 EF2B ; update LED1 (CAPITALS lock) MOS56 0127 EF67 ^3B MOS56 0061 EF2B 09 06 ORAIM &06 ;use addressable latch output 6 MOS56 0127 EF67 ^3B MOS56 0062 EF2D 8D 40 FE STA PBQ ;store LED1 MOS56 0127 EF67 ^3B MOS56 0063 EF30 ; update LED2 (SHIFT lock) MOS56 0127 EF67 ^3B MOS56 0064 EF30 4A LSRA ;move state into bit3 MOS56 0127 EF67 ^3B MOS56 0065 EF31 09 07 ORAIM &07 ;use addressable latch output 7 MOS56 0127 EF67 ^3B MOS56 0066 EF33 8D 40 FE STA PBQ ;store LED2 MOS56 0127 EF67 ^3B MOS56 0067 EF36 ; MOS56 0127 EF67 ^3B MOS56 0068 EF36 [ TRUE=0 MOS56 0127 EF67 ^3B MOS56 0069 EF36 20 39 F1 JSR KALLOX MOS56 0127 EF67 ^3B MOS56 0070 EF39 | MOS56 0127 EF67 ^3B MOS56 0073 EF39 ] MOS56 0127 EF67 ^3B MOS56 0074 EF39 ; MOS56 0127 EF67 ^3B MOS56 0075 EF39 68 PLA MOS56 0127 EF67 ^3B MOS56 0076 EF3A 60 RTS MOS56 0127 EF67 ^3B MOS56 0077 EF3B MOS56 0127 EF67 ^3B MOS56 0078 EF3B DEFKEY ;keyboard control effect MOS56 0127 EF67 ^3B MOS56 0079 EF3B ; MOS56 0127 EF67 ^3B MOS56 0080 EF3B ; entered with: MOS56 0127 EF67 ^3B MOS56 0081 EF3B ; C=0, V=0 => SHIFT/CTRL test MOS56 0127 EF67 ^3B MOS56 0082 EF3B ; C=1, V=0 => keyboard scan MOS56 0127 EF67 ^3B MOS56 0083 EF3B ; C=0, V=1 => keyboard interrupt MOS56 0127 EF67 ^3B MOS56 0084 EF3B ; C=1, V=1 => timer interrupt MOS56 0127 EF67 ^3B MOS56 0085 EF3B ; MOS56 0127 EF67 ^3B MOS56 0086 EF3B ; route keyboard entry reason MOS56 0127 EF67 ^3B MOS56 0087 EF3B ; MOS56 0127 EF67 ^3B MOS56 0088 EF3B 50 0A BVC KEYV0 ;[V=0] MOS56 0127 EF67 ^3B MOS56 0089 EF3D ; MOS56 0127 EF67 ^3B MOS56 0090 EF3D A9 01 LDAIM &01 MOS56 0127 EF67 ^3B MOS56 0091 EF3F 8D 4E FE STA IERQ MOS56 0127 EF67 ^3B MOS56 0092 EF42 ; MOS56 0127 EF67 ^3B MOS56 0093 EF42 B0 08 BCS KYBD ;[timer interrupt entry] MOS56 0127 EF67 ^3B MOS56 0094 EF44 4C 3E F0 JMP KBDAT ;[keyboard interrupt] MOS56 0127 EF67 ^3B MOS56 0095 EF47 ; MOS56 0127 EF67 ^3B MOS56 0096 EF47 KEYV0 MOS56 0127 EF67 ^3B MOS56 0097 EF47 90 06 BCC TSHIFT ;[SHIFT/CTRL test] MOS56 0127 EF67 ^3B MOS56 0098 EF49 4C DC F0 JMP SKFMA ;C=1, scan keyboard MOS56 0127 EF67 ^3B MOS56 0099 EF4C MOS56 0127 EF67 ^3B MOS56 0100 EF4C KYBD ;C=1 MOS56 0127 EF67 ^3B MOS56 0101 EF4C ; entered when key(s) active AND timer interrupt MOS56 0127 EF67 ^3B MOS56 0102 EF4C ; MOS56 0127 EF67 ^3B MOS56 0103 EF4C ; ensure no more keyboard timer interrupts MOS56 0127 EF67 ^3B MOS56 0104 EF4C EE 42 02 INC KSEMA ;KSEMA := 0 MOS56 0127 EF67 ^3B MOS56 0105 EF4F ; MOS56 0127 EF67 ^3B MOS56 0106 EF4F TSHIFT ;C=0 MOS56 0127 EF67 ^3B MOS56 0107 EF4F ; entry point used by test shift routine (uses C=1) MOS56 0127 EF67 ^3B MOS56 0108 EF4F ; clear SHIFT and CTRL status MOS56 0127 EF67 ^3B MOS56 0109 EF4F AD 5A 02 LDA KSTAT MOS56 0127 EF67 ^3B MOS56 0110 EF52 29 B7 ANDIM CTLSHI ;N.B. A will accumulate new state MOS56 0127 EF67 ^3B MOS56 0111 EF54 ; set SHIFT key status MOS56 0127 EF67 ^3B MOS56 0112 EF54 A2 00 LDXIM ZERO ;N.B. SHIFT key is at matrix entry 0 MOS56 0127 EF67 ^3B MOS56 0113 EF56 20 59 F0 JSR KC ;get state of SHIFT key MOS56 0127 EF67 ^3B MOS56 0114 EF59 ; N.B. C not corrupted MOS56 0127 EF67 ^3B MOS56 0115 EF59 86 FA STX KTEMP ;save state of SHIFT key for SHIFT/CAPS invert feature MOS56 0127 EF67 ^3B MOS56 0116 EF5B ; KTEMP = 1xxx xxxx => SHIFT MOS56 0127 EF67 ^3B MOS56 0117 EF5B ; KTEMP = 0xxx xxxx => no SHIFT MOS56 0127 EF67 ^3B MOS56 0118 EF5B B8 CLV MOS56 0127 EF67 ^3B MOS56 0119 EF5C 10 05 BPL KYBD1 ;[SHIFT key not active] MOS56 0127 EF67 ^3B MOS56 0120 EF5E ; shift key active and within timer interrupt routine MOS56 0127 EF67 ^3B MOS56 0121 EF5E 2C 50 D9 BIT FFBYT MOS56 0127 EF67 ^3B MOS56 0122 EF61 09 08 ORAIM SHFT MOS56 0127 EF67 ^3B MOS56 0123 EF63 KYBD1 MOS56 0127 EF67 ^3B MOS56 0124 EF63 ; set CTRL key status MOS56 0127 EF67 ^3B MOS56 0125 EF63 E8 INX ;X := 1, N.B. CTRL key is at matrix entry 1 MOS56 0127 EF67 ^3B MOS56 0126 EF64 20 59 F0 JSR KC ;get state of CTRL key MOS56 0127 EF67 ^3B MOS56 0127 EF67 90 BB BCC KBDIS ;[testing CTRL and SHIFT, MI=>CTRL, V=>SHIFT] MOS56 MOS56 MOS56 MOS56 Acorn macro assembler Page 117 MOS56 MOS56 Keyboard management MOS56 -- MOS56 0128 EF69 10 02 BPL KYBD2 ;[CTRL key not active] MOS56 0128 EF69 v7D MOS56 0129 EF6B ; CTRL key active MOS56 0128 EF69 v7D MOS56 0130 EF6B 09 40 ORAIM CTRL MOS56 0128 EF69 v7D MOS56 0131 EF6D KYBD2 ;A has accumulated new keyboard status MOS56 0128 EF69 v7D MOS56 0132 EF6D 8D 5A 02 STA KSTAT ;update keyboard status -- MOS56 0133 EF70 ; evaluate status of the current key -- MOS56 0134 EF70 ; IF IT IS & WAS OPEN, THEN FORGET IT -- MOS56 0135 EF70 ; IF OPEN & WAS CLOSED, MARK AS OPEN -- MOS56 0136 EF70 ; IF CLOSED & WAS OPEN, MARK AS CLOSED -- MOS56 0137 EF70 ; IF CLOSED & WAS CLOSED, THEN DECREMENT -- MOS56 0138 EF70 ; AUTO-REPEAT COUNTER. IF THIS GOES TO -- MOS56 0139 EF70 ; ZERO (IT STARTS AT 1 INITIALLY) THEN -- MOS56 0140 EF70 ; TRANSMIT CHARACTER TO RDCH BUFFER -- MOS56 0141 EF70 ; (UNLESS IT IS SHF LOCK OR CAPS LOCK) -- MOS56 0142 EF70 ; IF AUTO REPEAT PERMANENTLY DISABLED -- MOS56 0143 EF70 ; THEN DON'T RESET THIS COUNTER. -- MOS56 0144 EF70 A6 EC LDX CKEY -- MOS56 0145 EF72 F0 12 BEQ KBDWU ;[no current key] MOS56 0145 EF72 v6D MOS56 0146 EF74 ; current key exists MOS56 0145 EF72 v6D MOS56 0147 EF74 20 59 F0 JSR KC ;get status of current key MOS56 0145 EF72 v6D MOS56 0148 EF77 30 10 BMI KBDX ;[current key closed] MOS56 0145 EF72 v6D MOS56 0149 EF79 ; current key open MOS56 0145 EF72 v6D MOS56 0150 EF79 E4 EC CPX CKEY MOS56 0145 EF72 v6D MOS56 0151 EF7B KBDW MOS56 0145 EF72 v6D MOS56 0152 EF7B 86 EC STX CKEY ;update open/closed state of current key MOS56 0145 EF72 v6D MOS56 0153 EF7D D0 07 BNE KBDWU ;[current key: is open was closed, or is closed was open] MOS56 0145 EF72 v6D MOS56 0154 EF7F ; CURRENT KEY HAS BEEN OPEN FOR TWO CLOCK MOS56 0145 EF72 v6D MOS56 0155 EF7F ; CYCLES, SO 'FORGET' IT BY ZEROING CKEY MOS56 0145 EF72 v6D MOS56 0156 EF7F ; (KEY VALUES START AT 16 IN THIS RTNE) MOS56 0145 EF72 v6D MOS56 0157 EF7F ; ALSO SET COUNTER TO 1 MOS56 0145 EF72 v6D MOS56 0158 EF7F ; indicate no current key MOS56 0145 EF72 v6D MOS56 0159 EF7F A2 00 LDXIM ZERO MOS56 0145 EF72 v6D MOS56 0160 EF81 86 EC STX CKEY MOS56 0145 EF72 v6D MOS56 0161 EF83 FCSP ;fix to CTRL/SHIFT h/w problem MOS56 0145 EF72 v6D MOS56 0162 EF83 20 4E F0 JSR AR ;update auto-repeat intervals MOS56 0267 EFDB ^26 MOS56 0163 EF86 KBDWU MOS56 0267 EFDB ^26 MOS56 0164 EF86 4C 18 F0 JMP KBDY MOS56 0267 EFDB ^26 MOS56 0165 EF89 KBDX ;current KEY IS CLOSED:IF WAS OPEN,SIMPLY MOS56 0267 EFDB ^26 MOS56 0166 EF89 ; UPDATE STATUS,ELSE CHECK COUNTER MOS56 0267 EFDB ^26 MOS56 0167 EF89 ; AND PROCESS CHAR IF REQ'D. MOS56 0267 EFDB ^26 MOS56 0168 EF89 E4 EC CPX CKEY MOS56 0267 EFDB ^26 MOS56 0169 EF8B D0 EE BNE KBDW ;[current key: is closed, was open] MOS56 0267 EFDB ^26 MOS56 0170 EF8D ; current key is closed and was closed MOS56 0267 EFDB ^26 MOS56 0171 EF8D A5 E7 LDA ARCTR MOS56 0267 EFDB ^26 MOS56 0172 EF8F F0 23 BEQ KBDXS ;[auto-repeat suppressed] MOS56 0267 EFDB ^26 MOS56 0173 EF91 ; decrement auto-repeat countdown MOS56 0267 EFDB ^26 MOS56 0174 EF91 C6 E7 DEC ARCTR MOS56 0267 EFDB ^26 MOS56 0175 EF93 D0 1F BNE KBDXS ;[auto-repeat interval not exhausted] MOS56 0267 EFDB ^26 MOS56 0176 EF95 ; auto-repeat interval exhausted MOS56 0267 EFDB ^26 MOS56 0177 EF95 ; auto-repeat countdown := delay/repeat period MOS56 0267 EFDB ^26 MOS56 0178 EF95 AD CA 02 LDA FARCTR MOS56 0267 EFDB ^26 MOS56 0179 EF98 85 E7 STA ARCTR MOS56 0267 EFDB ^26 MOS56 0180 EF9A ; next auto-repeat interval := repeat period MOS56 0267 EFDB ^26 MOS56 0181 EF9A AD 55 02 LDA ARSET MOS56 0267 EFDB ^26 MOS56 0182 EF9D 8D CA 02 STA FARCTR MOS56 0267 EFDB ^26 MOS56 0183 EFA0 ; MOS56 0267 EFDB ^26 MOS56 0184 EFA0 AD 5A 02 LDA KSTAT MOS56 0267 EFDB ^26 MOS56 0185 EFA3 ; test for shift lock key MOS56 0267 EFDB ^26 MOS56 0186 EFA3 A6 EC LDX CKEY MOS56 0267 EFDB ^26 MOS56 0187 EFA5 E0 D0 CPXIM SHLKKY ;IS THIS THE SHIFT LOCK? MOS56 0267 EFDB ^26 MOS56 0188 EFA7 D0 0D BNE KCPLK ;[key is not SHIFT lock] MOS56 0267 EFDB ^26 MOS56 0189 EFA9 ; MOS56 0267 EFDB ^26 MOS56 0190 EFA9 ; SHIFT LOCK key processing MOS56 0267 EFDB ^26 MOS56 0191 EFA9 09 90 ORAIM CAPSL+INVERT ;clear CAPITALS lock state MOS56 0267 EFDB ^26 MOS56 0192 EFAB 49 A0 EORIM SHFTL+INVERT ;flip SHIFT lock state and clear invert MOS56 0267 EFDB ^26 MOS56 0193 EFAD KEYBD3 ;update keyboard status MOS56 0267 EFDB ^26 MOS56 0194 EFAD 8D 5A 02 STA KSTAT ;store SHIFT lock state MOS56 0267 EFDB ^26 MOS56 0195 EFB0 ; suppress auto-repeat MOS56 0267 EFDB ^26 MOS56 0196 EFB0 A9 00 LDAIM ZERO MOS56 0267 EFDB ^26 MOS56 0197 EFB2 85 E7 STA ARCTR MOS56 0267 EFDB ^26 MOS56 0198 EFB4 KBDXS MOS56 0267 EFDB ^26 MOS56 0199 EFB4 [ MOS125 = &FF MOS56 0267 EFDB ^26 MOS56 0201 EFB4 | MOS56 0267 EFDB ^26 MOS56 0202 EFB4 B0 62 BCS KBDY ;always branch MOS56 0202 EFB4 v1D MOS56 0203 EFB6 ] MOS56 0202 EFB4 v1D MOS56 0204 EFB6 MOS56 0202 EFB4 v1D MOS56 0205 EFB6 KCPLK ;CAPS key processing MOS56 0202 EFB4 v1D MOS56 0206 EFB6 E0 C0 CPXIM CPLKKY MOS56 0202 EFB4 v1D MOS56 0207 EFB8 D0 0E BNE KCPLK1 ;[not CAPITALS lock] MOS56 0202 EFB4 v1D MOS56 0208 EFBA ; clear SHIFT lock state MOS56 0202 EFB4 v1D MOS56 0209 EFBA 09 A0 ORAIM SHFTL+INVERT MOS56 0202 EFB4 v1D MOS56 0210 EFBC ; add in SHIFT invert status MOS56 0202 EFB4 v1D MOS56 0211 EFBC 24 FA BIT KTEMP MOS56 0202 EFB4 v1D MOS56 0212 EFBE 10 04 BPL KCPLK2 ;[not SHIFT/CAPS] MOS56 0202 EFB4 v1D MOS56 0213 EFC0 ; SHIFT/CAPS - force CAPS invert MOS56 0202 EFB4 v1D MOS56 0214 EFC0 09 10 ORAIM CAPSL MOS56 0202 EFB4 v1D MOS56 0215 EFC2 49 80 EORIM INVERT MOS56 0202 EFB4 v1D MOS56 0216 EFC4 KCPLK2 MOS56 0202 EFB4 v1D MOS56 0217 EFC4 ; flip CAPITALS lock state MOS56 0202 EFB4 v1D MOS56 0218 EFC4 49 90 EORIM CAPSL+INVERT MOS56 0202 EFB4 v1D MOS56 0219 EFC6 ; set CAPITALS lock state and disable auto-repeat MOS56 0202 EFB4 v1D MOS56 0220 EFC6 [ MOS125 = &FF MOS56 0202 EFB4 v1D MOS56 0222 EFC6 | MOS56 0202 EFB4 v1D MOS56 0223 EFC6 B0 E5 BCS KEYBD3 ;C=1 from CPXIM MOS56 0202 EFB4 v1D MOS56 0224 EFC8 ] MOS56 0202 EFB4 v1D MOS56 0225 EFC8 MOS56 0202 EFB4 v1D MOS56 0226 EFC8 KCPLK1 MOS56 0202 EFB4 v1D MOS56 0227 EFC8 ; AT THIS POINT, WE HAVE A CHARACTER FOR RDCH MOS56 0202 EFB4 v1D MOS56 0228 EFC8 ; NOW LOOK UP CODE AND MODIFY BY SHIFT MOS56 0202 EFB4 v1D MOS56 0229 EFC8 ; CONTROL OR CAPS LOCK AS APPROPRIATE MOS56 0202 EFB4 v1D MOS56 0230 EFC8 ; convert current key code to ASCII MOS56 0202 EFB4 v1D MOS56 0231 EFC8 BD DA EF LDAAX KTBL -&80 MOS56 0202 EFB4 v1D MOS56 0232 EFCB D0 03 BNE NTAB ;[not TAB key] MOS56 0202 EFB4 v1D MOS56 0233 EFCD ; TAB key MOS56 0202 EFB4 v1D MOS56 0234 EFCD AD 6B 02 LDA TABCOD MOS56 0202 EFB4 v1D MOS56 0235 EFD0 NTAB MOS56 0202 EFB4 v1D MOS56 0236 EFD0 MOS56 0202 EFB4 v1D MOS56 0237 EFD0 [ FALSE=0 MOS56 0202 EFB4 v1D MOS56 0256 EFD0 ] MOS56 0202 EFB4 v1D MOS56 0257 EFD0 MOS56 0202 EFB4 v1D MOS56 0258 EFD0 ; setup for KSTAT tests MOS56 0202 EFB4 v1D MOS56 0259 EFD0 AE 5A 02 LDX KSTAT MOS56 0202 EFB4 v1D MOS56 0260 EFD3 86 FA STX KTEMP MOS56 0202 EFB4 v1D MOS56 0261 EFD5 ; check for CTRL MOS56 0202 EFB4 v1D MOS56 0262 EFD5 26 FA ROL KTEMP MOS56 0202 EFB4 v1D MOS56 0263 EFD7 10 07 BPL KCONV6 ;[no CTRL] MOS56 0202 EFB4 v1D MOS56 0264 EFD9 ; cannot support two-key rollover with CTRL (h/w constraint) MOS56 0202 EFB4 v1D MOS56 0265 EFD9 A6 ED LDX OKEY MOS56 0202 EFB4 v1D MOS56 0266 EFDB FCSP1 ;chained branch MOS56 0202 EFB4 v1D MOS56 0267 EFDB D0 A6 BNE FCSP ;[at least two keys pressed] MOS56 0202 EFB4 v1D MOS56 0268 EFDD ; convert character to associated control character MOS56 MOS56 MOS56 MOS56 Acorn macro assembler Page 118 MOS56 MOS56 Keyboard management MOS56 MOS56 0202 EFB4 v1D MOS56 0269 EFDD 20 2B EB JSR CTRLCH MOS56 0202 EFB4 v1D MOS56 0270 EFE0 KCONV6 MOS56 0202 EFB4 v1D MOS56 0271 EFE0 ; check for SHIFT lock MOS56 0202 EFB4 v1D MOS56 0272 EFE0 [ MOS125 = &FF MOS56 0202 EFB4 v1D MOS56 0290 EFE0 | MOS56 0202 EFB4 v1D MOS56 0291 EFE0 26 FA ROL KTEMP MOS56 0202 EFB4 v1D MOS56 0292 EFE2 26 FA ROL KTEMP ;skip over CAPITALS lock state MOS56 0202 EFB4 v1D MOS56 0293 EFE4 90 07 BCC KCONV4 ;[SHIFT lock] MOS56 0202 EFB4 v1D MOS56 0294 EFE6 ; check for CAPS lock MOS56 0202 EFB4 v1D MOS56 0295 EFE6 30 0D BMI KCONV2 ;[no CAPS lock or SHIFT lock] MOS56 0202 EFB4 v1D MOS56 0296 EFE8 ; convert character to upper case MOS56 0202 EFB4 v1D MOS56 0297 EFE8 ; check for character in the range 'A' to 'Z' or 'a' to 'z' MOS56 0202 EFB4 v1D MOS56 0298 EFE8 20 5B E5 JSR CAPS MOS56 0202 EFB4 v1D MOS56 0299 EFEB B0 08 BCS KCONV2 ;[not alpha] MOS56 0202 EFB4 v1D MOS56 0300 EFED ; character is an alpha MOS56 0202 EFB4 v1D MOS56 0301 EFED KCONV4 MOS56 0202 EFB4 v1D MOS56 0302 EFED 20 08 EB JSR SHIFT ;invert case of alpha MOS56 0202 EFB4 v1D MOS56 0303 EFF0 ] MOS56 0202 EFB4 v1D MOS56 0304 EFF0 ; check for shift disabled MOS56 0202 EFB4 v1D MOS56 0305 EFF0 AE 5A 02 LDX KSTAT MOS56 0202 EFB4 v1D MOS56 0306 EFF3 10 0B BPL KCONV1 ;[shift disabled] MOS56 0202 EFB4 v1D MOS56 0307 EFF5 KCONV2 ;check for SHIFT MOS56 0202 EFB4 v1D MOS56 0308 EFF5 26 FA ROL KTEMP MOS56 0202 EFB4 v1D MOS56 0309 EFF7 10 07 BPL KCONV1 ;[no SHIFT] MOS56 0202 EFB4 v1D MOS56 0310 EFF9 ; cannot support two-key rollover with SHIFT (h/w constraint) MOS56 0202 EFB4 v1D MOS56 0311 EFF9 A6 ED LDX OKEY MOS56 0202 EFB4 v1D MOS56 0312 EFFB D0 DE BNE FCSP1 ;[at least two keys pressed] MOS56 0202 EFB4 v1D MOS56 0313 EFFD ; shift character MOS56 0202 EFB4 v1D MOS56 0314 EFFD 20 08 EB JSR SHIFT MOS56 0202 EFB4 v1D MOS56 0315 F000 KCONV1 MOS56 0202 EFB4 v1D MOS56 0316 F000 ; MOS56 0202 EFB4 v1D MOS56 0317 F000 ; check for interrupt character MOS56 0202 EFB4 v1D MOS56 0318 F000 ; MOS56 0202 EFB4 v1D MOS56 0319 F000 CD 6C 02 CMP INTCH MOS56 0202 EFB4 v1D MOS56 0320 F003 D0 07 BNE KESC1 ;[not interrupt character] MOS56 0202 EFB4 v1D MOS56 0321 F005 AE 75 02 LDX ESCHAR MOS56 0202 EFB4 v1D MOS56 0322 F008 D0 02 BNE KESC1 ;[treat as normal character] MOS56 0202 EFB4 v1D MOS56 0323 F00A ; MOS56 0202 EFB4 v1D MOS56 0324 F00A ; X=0, Z=1 MOS56 0202 EFB4 v1D MOS56 0325 F00A ; MOS56 0202 EFB4 v1D MOS56 0326 F00A 86 E7 STX ARCTR ;suppress auto-repeat for escape if escape condition enabled MOS56 0202 EFB4 v1D MOS56 0327 F00C KESC1 MOS56 0202 EFB4 v1D MOS56 0328 F00C ; MOS56 0202 EFB4 v1D MOS56 0329 F00C ; allow interrupts MOS56 0202 EFB4 v1D MOS56 0330 F00C ; MOS56 0202 EFB4 v1D MOS56 0331 F00C A8 TAY ;Y := character (will be passed to RDCHS) MOS56 0202 EFB4 v1D MOS56 0332 F00D 20 34 F1 JSR KALLOW MOS56 0202 EFB4 v1D MOS56 0333 F010 ; MOS56 0202 EFB4 v1D MOS56 0334 F010 ; insert character into RDCH buffer MOS56 0202 EFB4 v1D MOS56 0335 F010 ; MOS56 0202 EFB4 v1D MOS56 0336 F010 AD 59 02 LDA NETKDS MOS56 0202 EFB4 v1D MOS56 0337 F013 D0 03 BNE KBDY ;[keyboard disabled] MOS56 0202 EFB4 v1D MOS56 0338 F015 20 68 E5 JSR RDCHS MOS56 0202 EFB4 v1D MOS56 0339 F018 ; MOS56 0202 EFB4 v1D MOS56 0340 F018 KBDY ; NOW WE EVALUATE THE OLD KEY STATUS. MOS56 0202 EFB4 v1D MOS56 0341 F018 ; IF OPEN FOR 2 CLOCK CYCLES, FORGET IT MOS56 0202 EFB4 v1D MOS56 0342 F018 ; OTHERWISE, SIMPLY MEMORISE IT! MOS56 0202 EFB4 v1D MOS56 0343 F018 A6 ED LDX OKEY -- MOS56 0344 F01A F0 0B BEQ KBDA ;[old key does not exist] MOS56 0344 F01A v74 MOS56 0345 F01C ; MOS56 0344 F01A v74 MOS56 0346 F01C ; old key exists MOS56 0344 F01A v74 MOS56 0347 F01C 20 59 F0 JSR KC MOS56 0344 F01A v74 MOS56 0348 F01F 86 ED STX OKEY ;remember old key state MOS56 0344 F01A v74 MOS56 0349 F021 30 04 BMI KBDA ;[old key closed] MOS56 0344 F01A v74 MOS56 0350 F023 ; MOS56 0344 F01A v74 MOS56 0351 F023 ; old key open MOS56 0344 F01A v74 MOS56 0352 F023 [ FALSE=0 MOS56 0344 F01A v74 MOS56 0356 F023 ] MOS56 0344 F01A v74 MOS56 0357 F023 ; MOS56 0344 F01A v74 MOS56 0358 F023 ; old key: is open, was open MOS56 0344 F01A v74 MOS56 0359 F023 A2 00 LDXIM ZERO MOS56 0344 F01A v74 MOS56 0360 F025 86 ED STX OKEY ;indicate no old key MOS56 0344 F01A v74 MOS56 0361 F027 KBDA ; NOW CHECK TO SEE IF A SCAN IS NEEDED. MOS56 0344 F01A v74 MOS56 0362 F027 ; IF OLD KEY ZERO, DO SCAN. IF KEY DOWN & MOS56 0344 F01A v74 MOS56 0363 F027 ; NOT EQUAL CKEY THEN SET OLD=CURRENT, & THIS MOS56 0344 F01A v74 MOS56 0364 F027 ; ONE = CURRENT, RESET STATUS CHANGE BITS MOS56 0344 F01A v74 MOS56 0365 F027 A6 ED LDX OKEY -- MOS56 0366 F029 D0 16 BNE KBDAU ;[old key exists] MOS56 0366 F029 v69 MOS56 0367 F02B ; no old key so scan keyboard MOS56 0366 F029 v69 MOS56 0368 F02B A0 EC LDYIM CKEY MOS56 0366 F029 v69 MOS56 0369 F02D 20 D7 F0 JSR ISCAN MOS56 0366 F029 v69 MOS56 0370 F030 30 09 BMI KBDAS ;[all keys searched] MOS56 0366 F029 v69 MOS56 0371 F032 ; closed key found other than current key MOS56 0366 F029 v69 MOS56 0372 F032 ; new current key found MOS56 0366 F029 v69 MOS56 0373 F032 ; set old key = current key MOS56 0366 F029 v69 MOS56 0374 F032 A5 EC LDA CKEY MOS56 0366 F029 v69 MOS56 0375 F034 85 ED STA OKEY MOS56 0366 F029 v69 MOS56 0376 F036 KBDAR ;set new current key MOS56 0366 F029 v69 MOS56 0377 F036 86 EC STX CKEY ;current key := new key number MOS56 0394 F04C ^68 MOS56 0378 F038 20 4E F0 JSR AR ;update auto-repeat intervals MOS56 0394 F04C ^68 MOS56 0379 F03B 4C 13 EF KBDAS JMP KBDAW MOS56 0394 F04C ^68 MOS56 0380 F03E KBDAT MOS56 0394 F04C ^68 MOS56 0381 F03E ; ENTRY POINT FROM ANY KEY MOS56 0394 F04C ^68 MOS56 0382 F03E ; DOWN INTERRUPT MOS56 0394 F04C ^68 MOS56 0383 F03E ; enable keyboard by scanning random key (X) MOS56 0394 F04C ^68 MOS56 0384 F03E 20 59 F0 JSR KC MOS56 0394 F04C ^68 MOS56 0385 F041 KBDAU ;find new current key MOS56 0394 F04C ^68 MOS56 0386 F041 A5 EC LDA CKEY MOS56 0394 F04C ^68 MOS56 0387 F043 D0 F6 BNE KBDAS ;[current key exists, should only exist during power up] MOS56 0394 F04C ^68 MOS56 0388 F045 ; scan keyboard matrix entries MOS56 0394 F04C ^68 MOS56 0389 F045 A0 ED LDYIM OKEY MOS56 0394 F04C ^68 MOS56 0390 F047 20 D7 F0 JSR ISCAN MOS56 0394 F04C ^68 MOS56 0391 F04A 30 EF BMI KBDAS ;[processed all keys] MOS56 0394 F04C ^68 MOS56 0392 F04C ; pressed key found other than old key MOS56 0394 F04C ^68 MOS56 0393 F04C ; new current key identified MOS56 0394 F04C ^68 MOS56 0394 F04C 10 E8 BPL KBDAR ;[ALWAYS JUMP] -- MOS56 0395 F04E ; NEVER fall thru -- MOS56 0396 F04E -- MOS56 0397 F04E -- MOS56 0398 F04E AR ;set auto-repeat interval to reflect next character -- MOS56 0399 F04E A2 01 LDXIM &01 -- MOS56 0400 F050 86 E7 STX ARCTR -- MOS56 0401 F052 ; set next auto-repeat interval to delay period -- MOS56 0402 F052 AE 54 02 LDX FARSET -- MOS56 0403 F055 8E CA 02 STX FARCTR -- MOS56 0404 F058 60 RTS -- MOS56 0405 F059 -- MOS56 0406 F059 -- MOS56 0407 F059 [ FALSE=0 -- MOS56 0414 F059 ] -- MOS56 0415 F059 MOS56 MOS56 MOS56 MOS56 Acorn macro assembler Page 119 MOS56 MOS56 Keyboard management MOS56 -- MOS56 0416 F059 KC -- MOS56 0417 F059 ; KEYBOARD ACCESS SUBROUTINE -- MOS56 0418 F059 ; read state of key -- MOS56 0419 F059 ; X = 0rrrcccc -- MOS56 0420 F059 ; r = row, c = column -- MOS56 0421 F059 ; N.B. A and C not corrupted -- MOS56 0422 F059 [ 1=0 ;$Tutu -- MOS56 0434 F059 | -- MOS56 0435 F059 ; enable keyboard -- MOS56 0436 F059 A0 03 LDYIM &03 -- MOS56 0437 F05B 8C 40 FE STY PBQ -- MOS56 0438 F05E ; select VIAA PA6-PA0 as outputs -- MOS56 0439 F05E A0 7F LDYIM &7F -- MOS56 0440 F060 8C 43 FE STY DDRAQ -- MOS56 0441 F063 8E 4F FE STX PAPQ ;select matrix element -- MOS56 0442 F066 AE 4F FE LDX PAPQ ;read element status: N=0 => open, N=1 => closed -- MOS56 0443 F069 60 RTS -- MOS56 0444 F06A ] -- MOS56 0445 F06A -- MOS56 0446 F06A -- MOS56 0447 F06A -- MOS56 0448 F06A -- MOS56 0449 F06A ; KEY CONVERSION TABLE -- MOS56 0450 F06A ; ROW 0 -- MOS56 0451 F06A ; not relevant -- MOS56 0452 F06A ; (consists of SHIFT, CTRL and start-up options) -- MOS56 0453 F06A KTBL0 -- MOS56 0454 F06A F05A KTBL * KTBL0 -&10 -- MOS56 0455 F06A ; ROW 1 -- MOS56 0456 F06A 71 = "q" -- MOS56 0457 F06B 33 = "3" ;shift '#' -- MOS56 0458 F06C 34 = "4" ;shift '$' -- MOS56 0459 F06D 35 = "5" ;shift '%' -- MOS56 0460 F06E 84 = SOFTK4 ;f4 -- MOS56 0461 F06F 38 = "8" ;shift '(' -- MOS56 0462 F070 87 = SOFTK7 ;f7 -- MOS56 0463 F071 2D = "-" ;shift '=' -- MOS56 0464 F072 5E = "^" ;shift '~' -- MOS56 0465 F073 8C = CURLFT ;cursor left (fC) -- MOS56 0466 F074 -- MOS56 0467 F074 ; 'hide' 6 bytes -- MOS56 0468 F074 [ MOS125 = &FF -- MOS56 0474 F074 | -- MOS56 0475 F074 PUTCHK -- MOS56 0476 F074 -- MOS56 0477 F074 ;Output byte to cassette and add to check sum. -- MOS56 0478 F074 -- MOS56 0479 F074 20 AB F8 JSR PUTCAS -- MOS56 0480 F077 4C E6 F7 JMP ADDCRC -- MOS56 0481 F07A ] -- MOS56 0482 F07A -- MOS56 0483 F07A ; ROW 2 -- MOS56 0484 F07A 80 = SOFTK0 ;f0 -- MOS56 0485 F07B 77 = "w" -- MOS56 0486 F07C 65 = "e" -- MOS56 0487 F07D 74 = "t" -- MOS56 0488 F07E 37 = "7" ;shift single quote -- MOS56 0489 F07F 69 = "i" -- MOS56 0490 F080 39 = "9" ;shift ')' -- MOS56 0491 F081 30 = "0" ;same shifted -- MOS56 0492 F082 POUNDM -- MOS56 0493 F082 5F = "_" ;shift POUND -- MOS56 0494 F083 8E = CURDWN ;cursor down (fE) -- MOS56 0495 F084 -- MOS56 0496 F084 ; 'hide' 6 bytes -- MOS56 0497 F084 6C FE FD JMITST JMI TSTSFT -- MOS56 0498 F087 6C FA 00 JMI JMI JMILO ;jump to specific OSBYTE routine, C=1 -- MOS56 0499 F08A -- MOS56 0500 F08A ; ROW 3 -- MOS56 0501 F08A 31 = "1" ;shift '!' -- MOS56 0502 F08B 32 = "2" ;shift double quote -- MOS56 0503 F08C 64 = "d" -- MOS56 0504 F08D 72 = "r" -- MOS56 0505 F08E 36 = "6" ;shift '&' -- MOS56 0506 F08F 75 = "u" -- MOS56 0507 F090 6F = "o" -- MOS56 0508 F091 70 = "p" -- MOS56 0509 F092 5B = "[" ;shift curly left bracket -- MOS56 0510 F093 8F = CURUP ;cursor up (fF) -- MOS56 0511 F094 -- MOS56 0512 F094 ; 'hide' 6 bytes -- MOS56 0513 F094 2C 50 D9 JMIKYV BIT FFBYT -- MOS56 0514 F097 6C 28 02 JMIKEY JMI KEYVEC MOS56 0663 F0DA ^3B MOS56 0515 F09A MOS56 0663 F0DA ^3B MOS56 0516 F09A ; ROW 4 MOS56 0663 F0DA ^3B MOS56 0517 F09A 01 = &01 ;CAPS lock MOS56 0663 F0DA ^3B MOS56 0518 F09B 61 = "a" MOS56 0663 F0DA ^3B MOS56 0519 F09C 78 = "x" MOS56 0663 F0DA ^3B MOS56 0520 F09D 66 = "f" MOS56 0663 F0DA ^3B MOS56 0521 F09E 79 = "y" MOS56 0663 F0DA ^3B MOS56 0522 F09F 6A = "j" MOS56 0663 F0DA ^3B MOS56 0523 F0A0 6B = "k" MOS56 0663 F0DA ^3B MOS56 0524 F0A1 40 = AT ;same shifted MOS56 0663 F0DA ^3B MOS56 0525 F0A2 3A = ":" ;shift '*' MOS56 0663 F0DA ^3B MOS56 0526 F0A3 0D = MCR ;same shifted MOS56 0663 F0DA ^3B MOS56 0527 F0A4 MOS56 0663 F0DA ^3B MOS56 0528 F0A4 [ NOSP = &00 MOS56 0663 F0DA ^3B MOS56 0538 F0A4 | MOS56 0663 F0DA ^3B MOS56 0539 F0A4 ; 'hide' 6 bytes MOS56 0663 F0DA ^3B MOS56 0540 F0A4 SENDD MOS56 0663 F0DA ^3B MOS56 0541 F0A4 00 = &00 ;inputs MOS56 0663 F0DA ^3B MOS56 0542 F0A5 FF = &FF ;outputs MOS56 0663 F0DA ^3B MOS56 0543 F0A6 SENDS MOS56 0663 F0DA ^3B MOS56 0544 F0A6 01 = &01 ;read enable MOS56 0663 F0DA ^3B MOS56 0545 F0A7 02 = &02 ;write enable MOS56 0663 F0DA ^3B MOS56 0546 F0A8 SENDF MOS56 0663 F0DA ^3B MOS56 0547 F0A8 09 = &09 ;read disable MOS56 0663 F0DA ^3B MOS56 0548 F0A9 0A = &0A ;write disable MOS56 0663 F0DA ^3B MOS56 0549 F0AA ] MOS56 0663 F0DA ^3B MOS56 0550 F0AA MOS56 0663 F0DA ^3B MOS56 0551 F0AA ; ROW 5 MOS56 0663 F0DA ^3B MOS56 0552 F0AA 02 = &02 ;SHIFT lock MOS56 0663 F0DA ^3B MOS56 0553 F0AB 73 = "s" MOS56 0663 F0DA ^3B MOS56 0554 F0AC 63 = "c" MOS56 0663 F0DA ^3B MOS56 0555 F0AD 67 = "g" MOS56 0663 F0DA ^3B MOS56 0556 F0AE 68 = "h" MOS56 0663 F0DA ^3B MOS56 0557 F0AF 6E = "n" MOS56 0663 F0DA ^3B MOS56 0558 F0B0 6C = "l" MOS56 0663 F0DA ^3B MOS56 0559 F0B1 3B = ";" ;shift '+' MOS56 0663 F0DA ^3B MOS56 0560 F0B2 5D = "]" ;shift curly right bracket MOS56 0663 F0DA ^3B MOS56 0561 F0B3 7F = MDEL ;same shifted MOS56 MOS56 MOS56 MOS56 Acorn macro assembler Page 120 MOS56 MOS56 Keyboard management MOS56 MOS56 0663 F0DA ^3B MOS56 0562 F0B4 MOS56 0663 F0DA ^3B MOS56 0563 F0B4 ; 'hide' 6 bytes MOS56 0663 F0DA ^3B MOS56 0564 F0B4 RMLA ;read machine low memory address MOS56 0663 F0DA ^3B MOS56 0565 F0B4 AC 44 02 LDY HWM MOS56 0663 F0DA ^3B MOS56 0566 F0B7 A2 00 LDXIM ZERO MOS56 0663 F0DA ^3B MOS56 0567 F0B9 60 RTS MOS56 0663 F0DA ^3B MOS56 0568 F0BA MOS56 0663 F0DA ^3B MOS56 0569 F0BA ; ROW 6 MOS56 0663 F0DA ^3B MOS56 0570 F0BA 00 = ZERO ;TAB - programmable TAB key MOS56 0663 F0DA ^3B MOS56 0571 F0BB 7A = "z" MOS56 0663 F0DA ^3B MOS56 0572 F0BC 20 = SPACE ;same shifted MOS56 0663 F0DA ^3B MOS56 0573 F0BD 76 = "v" MOS56 0663 F0DA ^3B MOS56 0574 F0BE 62 = "b" MOS56 0663 F0DA ^3B MOS56 0575 F0BF 6D = "m" MOS56 0663 F0DA ^3B MOS56 0576 F0C0 2C = "," ;shift '<' MOS56 0663 F0DA ^3B MOS56 0577 F0C1 2E = "." ;shift '>' MOS56 0663 F0DA ^3B MOS56 0578 F0C2 2F = "/" ; shift '?' MOS56 0663 F0DA ^3B MOS56 0579 F0C3 8B = MCOPY ;copy character at cursor (fB) MOS56 0663 F0DA ^3B MOS56 0580 F0C4 MOS56 0663 F0DA ^3B MOS56 0581 F0C4 ; 'hide' 6 bytes MOS56 0663 F0DA ^3B MOS56 0582 F0C4 [ MOS125 = &FF MOS56 0663 F0DA ^3B MOS56 0587 F0C4 | MOS56 0663 F0DA ^3B MOS56 0588 F0C4 OPT MOS56 0663 F0DA ^3B MOS56 0589 F0C4 0A ASLA ;lsb(A) := 0 MOS56 0663 F0DA ^3B MOS56 0590 F0C5 ;* LDAIM $00 MOS56 0663 F0DA ^3B MOS56 0591 F0C5 EOF MOS56 0663 F0DA ^3B MOS56 0592 F0C5 29 01 ANDIM &01 ;$00 => OPT, $01 => EOF MOS56 0663 F0DA ^3B MOS56 0593 F0C7 4C A8 E0 JMP JMIFSC ;[ALWAYS JUMP, present option to file system AND return] MOS56 0663 F0DA ^3B MOS56 0594 F0CA ] MOS56 0663 F0DA ^3B MOS56 0595 F0CA MOS56 0663 F0DA ^3B MOS56 0596 F0CA ; ROW 7 MOS56 0663 F0DA ^3B MOS56 0597 F0CA 1B = ESC ;same shifted MOS56 0663 F0DA ^3B MOS56 0598 F0CB 81 = SOFTK1 ;f1 MOS56 0663 F0DA ^3B MOS56 0599 F0CC 82 = SOFTK2 ;f2 MOS56 0663 F0DA ^3B MOS56 0600 F0CD 83 = SOFTK3 ;f3 MOS56 0663 F0DA ^3B MOS56 0601 F0CE 85 = SOFTK5 ;f5 MOS56 0663 F0DA ^3B MOS56 0602 F0CF 86 = SOFTK6 ;f6 MOS56 0663 F0DA ^3B MOS56 0603 F0D0 88 = SOFTK8 ;f8 MOS56 0663 F0DA ^3B MOS56 0604 F0D1 89 = SOFTK9 ;f9 MOS56 0663 F0DA ^3B MOS56 0605 F0D2 5C = "\" ;shift '|' MOS56 0663 F0DA ^3B MOS56 0606 F0D3 8D = CURRHT ;cursor right (fD) MOS56 0663 F0DA ^3B MOS56 0607 F0D4 ENDKT MOS56 0663 F0DA ^3B MOS56 0608 F0D4 MOS56 0663 F0DA ^3B MOS56 0609 F0D4 MOS56 0663 F0DA ^3B MOS56 0610 F0D4 6C 20 02 JMIEVT JMI EVTVEC ;user event MOS56 0663 F0DA ^3B MOS56 0611 F0D7 MOS56 0663 F0DA ^3B MOS56 0612 F0D7 MOS56 0663 F0DA ^3B MOS56 0613 F0D7 [ MOS125 = &FF MOS56 0663 F0DA ^3B MOS56 0653 F0D7 ] MOS56 0663 F0DA ^3B MOS56 0654 F0D7 MOS56 0663 F0DA ^3B MOS56 0655 F0D7 MOS56 0663 F0DA ^3B MOS56 0656 F0D7 ISCAN ;scan keys from matrix address $10 MOS56 0663 F0DA ^3B MOS56 0657 F0D7 18 CLC ;ignore key addressed by Y MOS56 0663 F0DA ^3B MOS56 0658 F0D8 ; MOS56 0663 F0DA ^3B MOS56 0659 F0D8 XSCANA ;FX entry, scan keys from matrix address $10, C=1 (ignore no keys) MOS56 0663 F0DA ^3B MOS56 0660 F0D8 A2 10 LDXIM &10 MOS56 0663 F0DA ^3B MOS56 0661 F0DA ; MOS56 0663 F0DA ^3B MOS56 0662 F0DA XSCANB ;FX entry, scan keys from matrix address X, C=1 (ignore no keys) MOS56 0663 F0DA ^3B MOS56 0663 F0DA B0 BB BCS JMIKEY ;[route FX entries thru indirection] -- MOS56 0664 F0DC ; -- MOS56 0665 F0DC SKFMA ;scan keys from matrix address (should have C=1) -- MOS56 0666 F0DC ; start scan address in X -- MOS56 0667 F0DC ; X>=0 => scan keys starting at X -- MOS56 0668 F0DC ; X<0 => investigate key NOT(X) -- MOS56 0669 F0DC ; -- MOS56 0670 F0DC 8A TXA -- MOS56 0671 F0DD 10 05 BPL SKFMA2 ;[scan keys] MOS56 0671 F0DD v7A MOS56 0672 F0DF ; C=1 MOS56 0671 F0DD v7A MOS56 0673 F0DF ; look at key MOS56 0671 F0DD v7A MOS56 0674 F0DF ; MOS56 0671 F0DD v7A MOS56 0675 F0DF 20 59 F0 JSR KC ;result in top bit of X (N.B. does not alter C) MOS56 0671 F0DD v7A MOS56 0676 F0E2 ; C=1 MOS56 0671 F0DD v7A MOS56 0677 F0E2 B0 55 BCS KALLOX ;return result in A MOS56 0677 F0E2 v2A MOS56 0678 F0E4 ; MOS56 0677 F0E2 v2A MOS56 0679 F0E4 SKFMA2 MOS56 0677 F0E2 v2A MOS56 0680 F0E4 ; MOS56 0677 F0E2 v2A MOS56 0681 F0E4 08 PHP ;save request source indicator (in C) MOS56 0677 F0E2 v2A MOS56 0682 F0E5 90 02 BCC SKFMA1 ;[CKEY or OKEY entry] MOS56 0677 F0E2 v2A MOS56 0683 F0E7 A0 EE LDYIM CKEY+&02 MOS56 0677 F0E2 v2A MOS56 0684 F0E9 SKFMA1 MOS56 0677 F0E2 v2A MOS56 0685 F0E9 ; MOS56 0677 F0E2 v2A MOS56 0686 F0E9 99 DF 01 STAAY KSCSTA-CKEY ;save scan start address MOS56 0677 F0E2 v2A MOS56 0687 F0EC ; return MI => no keys, otherwise X = key MOS56 0677 F0E2 v2A MOS56 0688 F0EC A2 09 LDXIM &09 MOS56 0677 F0E2 v2A MOS56 0689 F0EE ; MOS56 0677 F0E2 v2A MOS56 0690 F0EE ISCAN1 MOS56 0677 F0E2 v2A MOS56 0691 F0EE ; allow interrupts MOS56 0677 F0E2 v2A MOS56 0692 F0EE ; MOS56 0677 F0E2 v2A MOS56 0693 F0EE 20 34 F1 JSR KALLOW MOS56 0677 F0E2 v2A MOS56 0694 F0F1 ; MOS56 0677 F0E2 v2A MOS56 0695 F0F1 ; select VIAA PA6-PA0 as outputs MOS56 0677 F0E2 v2A MOS56 0696 F0F1 ; MOS56 0677 F0E2 v2A MOS56 0697 F0F1 A9 7F LDAIM &7F MOS56 0677 F0E2 v2A MOS56 0698 F0F3 8D 43 FE STA DDRAQ MOS56 0677 F0E2 v2A MOS56 0699 F0F6 ; MOS56 0677 F0E2 v2A MOS56 0700 F0F6 ; claim keyboard MOS56 0677 F0E2 v2A MOS56 0701 F0F6 ; MOS56 0677 F0E2 v2A MOS56 0702 F0F6 A9 03 LDAIM &03 MOS56 0677 F0E2 v2A MOS56 0703 F0F8 8D 40 FE STA PBQ MOS56 0677 F0E2 v2A MOS56 0704 F0FB ; MOS56 0677 F0E2 v2A MOS56 0705 F0FB ; reset keyboard interrupt line MOS56 0677 F0E2 v2A MOS56 0706 F0FB ; MOS56 0677 F0E2 v2A MOS56 0707 F0FB A9 0F LDAIM &0F ;N.B. use non-existent group which does not interrupt MOS56 0677 F0E2 v2A MOS56 0708 F0FD 8D 4F FE STA PAPQ MOS56 0677 F0E2 v2A MOS56 0709 F100 ; MOS56 0677 F0E2 v2A MOS56 0710 F100 ; clear latched event MOS56 0677 F0E2 v2A MOS56 0711 F100 ; MOS56 0677 F0E2 v2A MOS56 0712 F100 A9 01 LDAIM &01 MOS56 0677 F0E2 v2A MOS56 0713 F102 8D 4D FE STA IFRQ MOS56 0677 F0E2 v2A MOS56 0714 F105 ; MOS56 0677 F0E2 v2A MOS56 0715 F105 8E 4F FE STX PAPQ ;select key (force no key first time thru loop) MOS56 0677 F0E2 v2A MOS56 0716 F108 MOS56 0677 F0E2 v2A MOS56 0717 F108 2C 4D FE BIT IFRQ ;test for latched event MOS56 0677 F0E2 v2A MOS56 0718 F10B F0 21 BEQ ISCAND ;[no group key pressed] MOS56 0677 F0E2 v2A MOS56 0719 F10D ; MOS56 0677 F0E2 v2A MOS56 0720 F10D ; key pressed in this group MOS56 0677 F0E2 v2A MOS56 0721 F10D ; MOS56 0677 F0E2 v2A MOS56 0722 F10D 8A TXA ;A := key at start of group MOS56 0677 F0E2 v2A MOS56 0723 F10E ; MOS56 0677 F0E2 v2A MOS56 0724 F10E ISCANC ;scan group to find pressed key within group MOS56 0677 F0E2 v2A MOS56 0725 F10E ; check key against start scan address MOS56 MOS56 MOS56 MOS56 Acorn macro assembler Page 121 MOS56 MOS56 Keyboard management MOS56 MOS56 0677 F0E2 v2A MOS56 0726 F10E ; MOS56 0677 F0E2 v2A MOS56 0727 F10E D9 DF 01 CMPAY KSCSTA-CKEY MOS56 0677 F0E2 v2A MOS56 0728 F111 90 16 BCC ISCANE ;[ignore key] MOS56 0677 F0E2 v2A MOS56 0729 F113 ; MOS56 0677 F0E2 v2A MOS56 0730 F113 8D 4F FE STA PAPQ MOS56 0677 F0E2 v2A MOS56 0731 F116 2C 4F FE BIT PAPQ MOS56 0677 F0E2 v2A MOS56 0732 F119 10 0E BPL ISCANE ;[individual key not pressed] MOS56 0677 F0E2 v2A MOS56 0733 F11B ; MOS56 0677 F0E2 v2A MOS56 0734 F11B ; individual key pressed MOS56 0677 F0E2 v2A MOS56 0735 F11B ; MOS56 0677 F0E2 v2A MOS56 0736 F11B ISCANB ;key press detected at key A MOS56 0677 F0E2 v2A MOS56 0737 F11B ; MOS56 0677 F0E2 v2A MOS56 0738 F11B ; key found MOS56 0677 F0E2 v2A MOS56 0739 F11B ; MOS56 0677 F0E2 v2A MOS56 0740 F11B 28 PLP MOS56 0677 F0E2 v2A MOS56 0741 F11C 08 PHP MOS56 0677 F0E2 v2A MOS56 0742 F11D B0 13 BCS ISCAN9 ;[ignore no character] MOS56 0677 F0E2 v2A MOS56 0743 F11F ; MOS56 0677 F0E2 v2A MOS56 0744 F11F 48 PHA ;save key code MOS56 0677 F0E2 v2A MOS56 0745 F120 ; MOS56 0677 F0E2 v2A MOS56 0746 F120 ; check whether to ignore character MOS56 0677 F0E2 v2A MOS56 0747 F120 ; MOS56 0677 F0E2 v2A MOS56 0748 F120 59 00 00 EORAY ZERO MOS56 0677 F0E2 v2A MOS56 0749 F123 0A ASLA ;ignore top bit MOS56 0677 F0E2 v2A MOS56 0750 F124 C9 01 CMPIM &01 MOS56 0677 F0E2 v2A MOS56 0751 F126 68 PLA ;restore key code MOS56 0677 F0E2 v2A MOS56 0752 F127 B0 09 BCS ISCAN9 ;[accept key] MOS56 0677 F0E2 v2A MOS56 0753 F129 ; MOS56 0677 F0E2 v2A MOS56 0754 F129 ; ignore key MOS56 0677 F0E2 v2A MOS56 0755 F129 ; MOS56 0677 F0E2 v2A MOS56 0756 F129 ISCANE ;ignore key MOS56 0677 F0E2 v2A MOS56 0757 F129 18 CLC MOS56 0677 F0E2 v2A MOS56 0758 F12A 69 10 ADCIM &10 MOS56 0677 F0E2 v2A MOS56 0759 F12C 10 E0 BPL ISCANC ;[step to next key within group] MOS56 0677 F0E2 v2A MOS56 0760 F12E ; MOS56 0677 F0E2 v2A MOS56 0761 F12E ; key group exhausted MOS56 0677 F0E2 v2A MOS56 0762 F12E ; MOS56 0677 F0E2 v2A MOS56 0763 F12E ISCAND ;scan within group failed MOS56 0677 F0E2 v2A MOS56 0764 F12E CA DEX MOS56 0677 F0E2 v2A MOS56 0765 F12F 10 BD BPL ISCAN1 ;[try next group] MOS56 0677 F0E2 v2A MOS56 0766 F131 ; no key found, X<0 MOS56 0677 F0E2 v2A MOS56 0767 F131 8A TXA ;set up to negate effect of TAX MOS56 0677 F0E2 v2A MOS56 0768 F132 ; MOS56 0677 F0E2 v2A MOS56 0769 F132 ISCAN9 ;accept key MOS56 0677 F0E2 v2A MOS56 0770 F132 AA TAX ;X := key address MOS56 0677 F0E2 v2A MOS56 0771 F133 ; MOS56 0677 F0E2 v2A MOS56 0772 F133 28 PLP MOS56 0677 F0E2 v2A MOS56 0773 F134 ; MOS56 0677 F0E2 v2A MOS56 0774 F134 KALLOW ;release keyboard and allow interrupts MOS56 0677 F0E2 v2A MOS56 0775 F134 ; **** MUST NOT CORRUPT Y **** MOS56 0677 F0E2 v2A MOS56 0776 F134 ; release keyboard MOS56 0677 F0E2 v2A MOS56 0777 F134 ; MOS56 0677 F0E2 v2A MOS56 0778 F134 20 39 F1 JSR KALLOX ;release keyboard MOS56 0677 F0E2 v2A MOS56 0779 F137 ; MOS56 0677 F0E2 v2A MOS56 0780 F137 ; allow interrupts MOS56 0677 F0E2 v2A MOS56 0781 F137 ; MOS56 0677 F0E2 v2A MOS56 0782 F137 58 CLI MOS56 0677 F0E2 v2A MOS56 0783 F138 78 SEI MOS56 0677 F0E2 v2A MOS56 0784 F139 ; MOS56 0677 F0E2 v2A MOS56 0785 F139 KALLOX ;release keyboard MOS56 0677 F0E2 v2A MOS56 0786 F139 A9 0B LDAIM &0B -- MOS56 0787 F13B 8D 40 FE STA PBQ -- MOS56 0788 F13E ; -- MOS56 0789 F13E ; return result in N -- MOS56 0790 F13E ; -- MOS56 0791 F13E 8A TXA ;N=1 => no new key, N=0 => new key in X -- MOS56 0792 F13F 60 RTS -- MOS56 0793 F140 -- MOS56 0794 F140 -- MOS56 0795 F140 -- MOS56 0796 F140 < 3 -- MOS56 0797 F140 -- MOS56 0798 F140 LNK MOS70 -- MOS70 0001 F140 TTL C.F.S. Manifest File - MOS70 -- MOS70 0002 F140 OPT &01 -- MOS70 0003 F140 -- MOS70 0004 F140 0005 MOS70 * DEFOPT -- MOS70 0005 F140 0005 MOS72 * DEFOPT -- MOS70 0006 F140 0005 MOS74 * DEFOPT -- MOS70 0007 F140 0005 MOS76 * DEFOPT -- MOS70 0008 F140 -- MOS70 0009 F140 OPT MOS70 MOS70 MOS70 MOS70 MOS70 Acorn macro assembler Page 122 MOS70 C.F.S. Manifest File - MOS70 MOS70 -- MOS70 0010 F140 -- MOS70 0011 F140 < &0003 -- MOS70 0012 F140 > &0002 -- MOS70 0013 F140 -- MOS70 0014 F140 -- MOS70 0015 F140 ;****** C.F.S HEADER FILE ****** -- MOS70 0016 F140 -- MOS70 0017 F140 -- MOS70 0018 F140 -- MOS70 0019 F140 ;cIOBYTS * $00 ;No longer used -- MOS70 0020 F140 0000 LENSW * &00 ;Zero => LOAD modify's OSFILE block -- MOS70 0021 F140 0001 DEBUG * &01 ;zero => messages. +ve => no messages -- MOS70 0022 F140 0000 TUBESW * &00 ;Zero => tube, +ve => no tube -- MOS70 0023 F140 00FF PREMRG * &FF ;Zero => entry indirections, +ve => none -- MOS70 0024 F140 00FF GLYN * &FF ;Zero => special IBG code for -- MOS70 0025 F140 ;Glynn. +ve => as per spec. -- MOS70 0026 F140 -- MOS70 0027 F140 ;MANIFESTS -- MOS70 0028 F140 -- MOS70 0029 F140 00FE ENDBYT * &FE ;Byte after end of file (GETBYT) -- MOS70 0030 F140 -- MOS70 0031 F140 0091 FXCDRV * &0091 ;FX call number -- MOS70 0032 F140 00FF READFX * &FF -- MOS70 0033 F140 0000 WRITFX * &00 -- MOS70 0034 F140 -- MOS70 0035 F140 0001 INHAND * &0001 ;Input handle -- MOS70 0036 F140 0002 OUTHND * &0002 ;Output handle -- MOS70 0037 F140 0003 HNDS * &03 ;Both handles -- MOS70 0038 F140 00FD NOUTHD * &FD -- MOS70 0039 F140 000B FTSIZE * &000B ;File title size (incl. CR) -- MOS70 0040 F140 -- MOS70 0041 F140 ;Note that the 6850 status bytes (following) -- MOS70 0042 F140 ;have their bottom nybble modified according to -- MOS70 0043 F140 ;the setting of SPEED in the routines RXINIT and TXINIT -- MOS70 0044 F140 -- MOS70 0045 F140 0030 TXSTAT * &30 ;6850 TX status -- MOS70 0046 F140 ;TXSTAT = ~RTS lo;TXI enabled;8 bits + 1 stop -- MOS70 0047 F140 00D0 RXSTAT * &D0 -- MOS70 0048 F140 ;RXSTAT = ~RTS hi;TXI disabled;8 bits + 1 stop -- MOS70 0049 F140 -- MOS70 0050 F140 0002 TXBIT * &02 -- MOS70 0051 F140 0001 RXBIT * &01 -- MOS70 0052 F140 0004 DCDBIT * &04 -- MOS70 0053 F140 -- MOS70 0054 F140 0085 SERON * &85 ;Motor on/cass. on/RXCLK=0/TXCLK= 1,0,1 -- MOS70 0055 F140 0005 SEROFF * &05 ;As SERON but motor off -- MOS70 0056 F140 ;ERRORS -- MOS70 0057 F140 -- MOS70 0058 F140 00DF ERRBAS * &DF -- MOS70 0059 F140 -- MOS70 0060 F140 00DF CFSERD * ERRBAS -&00 ;EOF -- MOS70 0061 F140 00DE CFSERB * ERRBAS -&01 ;Channel -- MOS70 0062 F140 00DD CFSERK * ERRBAS -&02 ;Address -- MOS70 0063 F140 00DC SYNXER * ERRBAS -&03 ;Syntax -- MOS70 0064 F140 00DB CFSERF * ERRBAS -&04 ;File -- MOS70 0065 F140 00DA CFSERH * ERRBAS -&05 ;Block -- MOS70 0066 F140 00D9 CFSERI * ERRBAS -&06 ;Header -- MOS70 0067 F140 00D8 CFSERJ * ERRBAS -&07 ;Data -- MOS70 0068 F140 00D8 CFSERR * CFSERJ ;Bad tape -- MOS70 0069 F140 -- MOS70 0070 F140 00D7 SFSERR * ERRBAS -&08 ;Bad ROM -- MOS70 0071 F140 00D6 SFSER1 * ERRBAS -&09 ;File not found -- MOS70 0072 F140 -- MOS70 0073 F140 00D5 CFSERL * ERRBAS -&0A ;Locked -- MOS70 0074 F140 -- MOS70 0075 F140 -- MOS70 0076 F140 ;STATUS BYTE MASKS -- MOS70 0077 F140 -- MOS70 0078 F140 0001 INOPEN * &01 -- MOS70 0079 F140 0002 OUTOPN * &02 -- MOS70 0080 F140 0040 LSTBYT * &40 ;Last byte read (GETBYTE) -- MOS70 0081 F140 0080 EOFBIT * &80 ;Last byte +1 read (GETBYTE) -- MOS70 0082 F140 00C0 LSTEOF * &C0 ;Last byte & EOF -- MOS70 0083 F140 -- MOS70 0084 F140 00F7 NCTBIT * &F7 ;Complement of CATBIT -- MOS70 0085 F140 003F NEFBIT * &3F ;Complement of EOFBIT/lastbyte -- MOS70 0086 F140 00FE NINHND * &FE ;Complement of INHAND -- MOS70 0087 F140 003E NECBIT * &3E ;Complement of EOFBIT/lastbyte/openin bit -- MOS70 0088 F140 -- MOS70 0089 F140 -- MOS70 0090 F140 -- MOS70 0091 F140 ;MESSAGE/ERROR SELECTION MASKS -- MOS70 0092 F140 -- MOS70 0093 F140 -- MOS70 0094 F140 00CC ERRMSK * &CC ;Error bits to zero -- MOS70 0095 F140 0033 MSGMSK * &33 ;Message bits to zero -- MOS70 0096 F140 0088 MSGS1 * &88 ;Short messages -- MOS70 0097 F140 00CC MSGS2 * &CC ;Long messages -- MOS70 0098 F140 -- MOS70 0099 F140 0011 ABTBIT * &11 ;Abort set -- MOS70 0100 F140 0022 RETBIT * &22 ;Retry set -- MOS70 0101 F140 0000 IGBIT * &00 ;Both error bits off => ignore -- MOS70 0102 F140 0030 NIGBIT * &30 ;Complement of ignore bits -- MOS70 0103 F140 -- MOS70 0104 F140 00A1 DEFLT * &A1 -- MOS70 0105 F140 -- MOS70 0106 F140 ;Default is retry/messages for loaded and saved -- MOS70 0107 F140 ;files, abort/no messages for sequential files. -- MOS70 0108 F140 -- MOS70 0109 F140 -- MOS70 0110 F140 ;INFO FIELDS -- MOS70 0111 F140 -- MOS70 0112 F140 000C BKINFO * FTSIZE +&01 -- MOS70 0113 F140 000C BKLOAD * BKINFO -- MOS70 0114 F140 000C BKLDLO * BKLOAD -- MOS70 0115 F140 000D BKLDHI * BKLDLO +&01 -- MOS70 0116 F140 0010 BKEXEC * BKLOAD +&04 -- MOS70 0117 F140 0014 BKNOLO * BKEXEC +&04 -- MOS70 0118 F140 0015 BKNOHI * BKNOLO +&01 ;Block no. (lo & hi) -- MOS70 0119 F140 0016 BKSZEL * BKNOHI +&01 -- MOS70 0120 F140 0017 BKSZEH * BKSZEL +&01 -- MOS70 0121 F140 0018 BKFLAG * BKSZEH +&01 ;b7 => last block -- MOS70 0122 F140 0019 BKSPAR * BKFLAG +&01 -- MOS70 0123 F140 001D BKLAST * BKSPAR +&04 ;Length of info. -- MOS70 0124 F140 -- MOS70 0125 F140 001D BKWORKK * BKLAST -- MOS70 0126 F140 001E BKWRK1 * BKWORKK +&01 -- MOS70 0127 F140 001F BKWRK2 * BKWRK1 +&01 -- MOS70 0128 F140 -- MOS70 0129 F140 -- MOS70 0130 F140 MOS70 MOS70 MOS70 MOS70 Acorn macro assembler Page 123 MOS70 C.F.S. Manifest File - MOS70 MOS70 -- MOS70 0131 F140 -- MOS70 0132 F140 ;BLOCK FLAG MASKS -- MOS70 0133 F140 -- MOS70 0134 F140 0080 LASTBK * &80 ;NOTE - don't change, BMI and BVS etc. used -- MOS70 0135 F140 -- MOS70 0136 F140 -- MOS70 0137 F140 -- MOS70 0138 F140 ;TIMES -- MOS70 0139 F140 -- MOS70 0140 F140 0019 DEFGAP * &19 ;25/10 Secs inter block gap -- MOS70 0141 F140 0006 GAP * &06 ;SAVE/LOAD gap -- MOS70 0142 F140 -- MOS70 0143 F140 -- MOS70 0144 F140 ;BITS AND PIECES -- MOS70 0145 F140 -- MOS70 0146 F140 -- MOS70 0147 F140 -- MOS70 0148 F140 -- MOS70 0149 F140 0008 CATBIT * &08 ;Doing a CAT -- MOS70 0150 F140 0088 MONBIT * &88 ;Messages on/off -- MOS70 0151 F140 -- MOS70 0152 F140 -- MOS70 0153 F140 02EA INBSZE * CFSA ;GBYT block size (retained over FS change) -- MOS70 0154 F140 02EC BUFFLG * INBSZE +&02 ;Note BUFFLG & INBZSE must be contig. -- MOS70 0155 F140 -- MOS70 0156 F140 02ED FINBYT * CFSD ;Last byte in GETBYT buffer -- MOS70 0157 F140 -- MOS70 0158 F140 ;BUFFERS -- MOS70 0159 F140 -- MOS70 0160 F140 0A00 INBUFR * &0A00 -- MOS70 0161 F140 0900 OUTBFR * &0900 ;Sequential access I/O buffers -- MOS70 0162 F140 -- MOS70 0163 F140 ;VARS -- MOS70 0164 F140 -- MOS70 0165 F140 0380 VARSS * &0380 -- MOS70 0166 F140 0300 VARPGE * &0300 -- MOS70 0167 F140 -- MOS70 0168 F140 0380 OUTHDR * VARSS ;Header buffer for PUTBYTE -- MOS70 0169 F140 039D OUTPTR * OUTHDR +BKLAST -- MOS70 0170 F140 039E INPTR * OUTPTR +&01 -- MOS70 0171 F140 039F INLDEX * INPTR +&01 ;8 bytes load/exec for input file -- MOS70 0172 F140 03A7 INFILE * INLDEX +&08 ;GETBYTE file name -- MOS70 0173 F140 03B2 INFO * INFILE +FTSIZE ;Header buffer -- MOS70 0174 F140 03CF WORKK * INFO +BKWORKK ;Space to read CRC during RDHEAD -- MOS70 0175 F140 03D1 SEQGAP * WORKK +&02 -- MOS70 0176 F140 03D2 FILNAM * SEQGAP +&01 -- MOS70 0177 F140 03DD NEXTIN * FILNAM +FTSIZE ;Next expected block (GETBYTE) -- MOS70 0178 F140 03DF OLDFLG * NEXTIN +&02 -- MOS70 0179 F140 -- MOS70 0180 F140 03CB SRPTR * INFO +BKSPAR -- MOS70 0181 F140 -- MOS70 0182 F140 -- MOS70 0183 F140 ;CHIP LOCATIONS -- MOS70 0184 F140 -- MOS70 0185 F140 FE08 STATUS * &FE08 -- MOS70 0186 F140 FE09 PORT * &FE09 -- MOS70 0187 F140 -- MOS70 0188 F140 -- MOS70 0189 F140 -- MOS70 0190 F140 ;DOS/MOS ROUTINES & ADDRESSES -- MOS70 0191 F140 -- MOS70 0192 F140 -- MOS70 0193 F140 00FF ESCADD * &00FF ;b7 = 1 if ESCAPE occured -- MOS70 0194 F140 -- MOS70 0195 F140 -- MOS70 0196 F140 ;TUBE THINGS -- MOS70 0197 F140 -- MOS70 0198 F140 0000 TUBER * &00 ;Value in A for tube READ initialisation -- MOS70 0199 F140 0001 TUBEW * &01 ;Value in A for tube WRITE initialisation -- MOS70 0200 F140 0004 TUBEX * &04 ;Value in A for tube execute -- MOS70 0201 F140 -- MOS70 0202 F140 0080 TUBERL * &80 ;A reg. for tube RELEASE -- MOS70 0203 F140 00C0 TUBECL * &C0 ;A reg. for tube CLAIM -- MOS70 0204 F140 -- MOS70 0205 F140 002B SFSEND * "+" ;Marker for end of SERROM -- MOS70 0206 F140 -- MOS70 0207 F140 ; interface to code in MOS -- MOS70 0208 F140 ; -- MOS70 0209 F140 -- MOS70 0210 F140 -- MOS70 0211 F140 LNK MOS72 -- MOS72 0001 F140 ; FILE -> MOS72 -- MOS72 0002 F140 -- MOS72 0003 F140 [ MOS125 = &FF -- MOS72 0005 F140 ] -- MOS72 0006 F140 -- MOS72 0007 F140 TTL C.F.S. Main Routines - INIT -- MOS72 0008 F140 OPT MOS72 MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 124 MOS72 C.F.S. Main Routines - INIT MOS72 -- MOS72 0009 F140 -- MOS72 0010 F140 -- MOS72 0011 F140 [ MOS125 = &FF -- MOS72 0045 F140 | -- MOS72 0046 F140 INIT -- MOS72 0047 F140 -- MOS72 0048 F140 ;Initialises CLI and file operation -- MOS72 0049 F140 ;vectors. Motor turned OFF -- MOS72 0050 F140 -- MOS72 0051 F140 ;Z set => 300 baud => speed nybble = 6 -- MOS72 0052 F140 ;Z unset => 1200 baud => speed nybble = 5 -- MOS72 0053 F140 -- MOS72 0054 F140 ;Speed nybble is OR'd in with -- MOS72 0055 F140 ;6850 status byte during TX/RXinit -- MOS72 0056 F140 -- MOS72 0057 F140 08 PHP -- MOS72 0058 F141 A9 A1 LDAIM DEFLT -- MOS72 0059 F143 85 E3 STA OPTS ;User status = retry & msgs on -- MOS72 0060 F145 A9 19 LDAIM DEFGAP -- MOS72 0061 F147 8D D1 03 STA SEQGAP -- MOS72 0062 F14A D0 09 BNE SOFTPT MOS72 0062 F14A v76 MOS72 0063 F14C MOS72 0062 F14A v76 MOS72 0064 F14C MOS72 0062 F14A v76 MOS72 0065 F14C CROM ;A=$8D, V=0 MOS72 0062 F14A v76 MOS72 0066 F14C TAPE ;A=$8C, V=0 MOS72 0062 F14A v76 MOS72 0067 F14C 49 8C EORIM &8C MOS72 0062 F14A v76 MOS72 0068 F14E TAPE12 ;used by RESET, A=X=$00 MOS72 0062 F14A v76 MOS72 0069 F14E 0A ASLA MOS72 0062 F14A v76 MOS72 0070 F14F 8D 47 02 STA SROMSW ;A=0 => *TAPE, A=2 => *ROM MOS72 0062 F14A v76 MOS72 0071 F152 E0 03 CPXIM &03 ;test for *TAPE3 MOS72 0062 F14A v76 MOS72 0072 F154 08 PHP MOS72 0062 F14A v76 MOS72 0073 F155 MOS72 0062 F14A v76 MOS72 0074 F155 MOS72 0062 F14A v76 MOS72 0075 F155 ;Note CFSTAT (CFS0) set to zero by MOS free of charge MOS72 0062 F14A v76 MOS72 0076 F155 ;on hard reset MOS72 0062 F14A v76 MOS72 0077 F155 MOS72 0062 F14A v76 MOS72 0078 F155 SOFTPT ;Soft entry point (*TAPE) MOS72 0062 F14A v76 MOS72 0079 F155 ] MOS72 0062 F14A v76 MOS72 0080 F155 A9 06 LDAIM FSDIE -- MOS72 0081 F157 20 A8 E0 JSR JMIFSC ;present command to file system -- MOS72 0082 F15A A2 06 LDXIM &06 -- MOS72 0083 F15C 28 PLP -- MOS72 0084 F15D F0 01 BEQ INITON MOS72 0084 F15D v7E MOS72 0085 F15F CA DEX MOS72 0084 F15D v7E MOS72 0086 F160 86 C6 INITON STX SPEED -- MOS72 0087 F162 ; -- MOS72 0088 F162 ; initialise filing system indirection table -- MOS72 0089 F162 ; -- MOS72 0090 F162 A2 0E LDXIM &0E -- MOS72 0091 F164 BD EA D8 INITLP LDAAX CFSTAB -&01 MOS72 0094 F16B ^77 MOS72 0092 F167 9D 11 02 STAAX FILVEC -&01 MOS72 0094 F16B ^77 MOS72 0093 F16A CA DEX MOS72 0094 F16B ^77 MOS72 0094 F16B D0 F7 BNE INITLP -- MOS72 0095 F16D 86 C2 STX ITYPE ;No i'rupts pending -- MOS72 0096 F16F ; -- MOS72 0097 F16F ; inform paged ROMs of change -- MOS72 0098 F16F ; -- MOS72 0099 F16F A2 0F LDXIM SVFSIC -- MOS72 0100 F171 ; -- MOS72 0101 F171 SVOP ;issue service ROM operati -- MOS72 0102 F171 ; optype in X -- MOS72 0103 F171 A5 F4 LDA ROMID ;save current ROM id -- MOS72 0104 F173 48 PHA -- MOS72 0105 F174 8A TXA ;A = optype -- MOS72 0106 F175 ; -- MOS72 0107 F175 A2 0F LDXIM NROM-&1 -- MOS72 0108 F177 SVOP1 -- MOS72 0109 F177 [ $Tutu ; Less farting about with page 02 -- MOS72 0115 F177 | -- MOS72 0116 F177 FE A1 02 INCAX ROMS ;test MOS72 0135 F18B ^6A MOS72 0117 F17A DE A1 02 DECAX ROMS ;ROMS MOS72 0135 F18B ^6A MOS72 0118 F17D 10 0B BPL SVOP2 ;[not a service ROM] MOS72 0135 F18B ^6A MOS72 0119 F17F ] MOS72 0135 F18B ^6A MOS72 0120 F17F ; found a service ROM MOS72 0135 F18B ^6A MOS72 0121 F17F [ MOS125 = &FF MOS72 0135 F18B ^6A MOS72 0124 F17F | MOS72 0135 F18B ^6A MOS72 0125 F17F 20 E2 DB JSR STXROM MOS72 0135 F18B ^6A MOS72 0126 F182 ] MOS72 0135 F18B ^6A MOS72 0127 F182 ; call service routine MOS72 0135 F18B ^6A MOS72 0128 F182 20 03 80 JSR ROMSFT ;initialise service ROM MOS72 0135 F18B ^6A MOS72 0129 F185 AA TAX MOS72 0135 F18B ^6A MOS72 0130 F186 F0 05 BEQ SVOP3 ;[service claimed, do not offer to other ROMs] MOS72 0135 F18B ^6A MOS72 0131 F188 ; MOS72 0135 F18B ^6A MOS72 0132 F188 A6 F4 LDX ROMID ;restore ROM id MOS72 0135 F18B ^6A MOS72 0133 F18A SVOP2 MOS72 0135 F18B ^6A MOS72 0134 F18A CA DEX MOS72 0135 F18B ^6A MOS72 0135 F18B 10 EA BPL SVOP1 MOS72 0130 F186 v7A MOS72 0136 F18D ; X<>0 MOS72 0130 F186 v7A MOS72 0137 F18D SVOP3 ;C = return code MOS72 0130 F186 v7A MOS72 0138 F18D ; restore caller's ROMid MOS72 0130 F186 v7A MOS72 0139 F18D 68 PLA -- MOS72 0140 F18E 85 F4 STA ROMID -- MOS72 0141 F190 8D 30 FE STA ROM -- MOS72 0142 F193 ; restore return code -- MOS72 0143 F193 8A TXA ;A=0 => claimed, A<>0 => not claimed -- MOS72 0144 F194 60 RTS -- MOS72 0145 F195 -- MOS72 0146 F195 -- MOS72 0147 F195 TTL C.F.S. Main Routines - ARGGO -- MOS72 0148 F195 OPT &01 -- MOS72 0149 F195 -- MOS72 0150 F195 -- MOS72 0151 F195 ;Returns 1 if in 1200 baud cassette -- MOS72 0152 F195 ;2 300 -- MOS72 0153 F195 ;3 if in SERROM filing system -- MOS72 0154 F195 -- MOS72 0155 F195 ;Note SPEED is 5 if in 1200 and 6 in 300 -- MOS72 0156 F195 -- MOS72 0157 F195 -- MOS72 0158 F195 ARGGO -- MOS72 0159 F195 09 00 ORAIM 0 -- MOS72 0160 F197 D0 0D BNE INTRTS ;No action on non-zero entry condition MOS72 0160 F197 v72 MOS72 0161 F199 C0 00 CPYIM &00 MOS72 0160 F197 v72 MOS72 0162 F19B D0 09 BNE INTRTS ;If handle not zero -> don't do MOS72 0160 F197 v72 MOS72 0163 F19D [ MOS125 = &FF MOS72 0160 F197 v72 MOS72 0170 F19D | MOS72 0160 F197 v72 MOS72 0171 F19D A9 03 LDAIM &03 MOS72 0160 F197 v72 MOS72 0172 F19F 2C 47 02 BIT SROMSW MOS72 0160 F197 v72 MOS72 0173 F1A2 D0 02 BNE INTRTS MOS72 0160 F197 v72 MOS72 0174 F1A4 25 C6 AND SPEED MOS72 0160 F197 v72 MOS72 0175 F1A6 ] MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 125 MOS72 C.F.S. Main Routines - ARGGO MOS72 MOS72 0160 F197 v72 MOS72 0176 F1A6 60 INTRTS RTS MOS72 0215 F1A9 ^7B MOS72 0177 F1A7 MOS72 0215 F1A9 ^7B MOS72 0178 F1A7 MOS72 0215 F1A9 ^7B MOS72 0179 F1A7 TTL C.F.S Main Routines - FSFUNC MOS72 0215 F1A9 ^7B MOS72 0180 F1A7 OPT &01 MOS72 0215 F1A9 ^7B MOS72 0181 F1A7 MOS72 0215 F1A9 ^7B MOS72 0182 F1A7 [ MOS125 = &FF MOS72 0215 F1A9 ^7B MOS72 0209 F1A7 | MOS72 0215 F1A9 ^7B MOS72 0210 F1A7 FSFUNC MOS72 0215 F1A9 ^7B MOS72 0211 F1A7 MOS72 0215 F1A9 ^7B MOS72 0212 F1A7 ;File system operation entry pt. MOS72 0215 F1A9 ^7B MOS72 0213 F1A7 MOS72 0215 F1A9 ^7B MOS72 0214 F1A7 C9 07 CMPIM NOTAB MOS72 0215 F1A9 ^7B MOS72 0215 F1A9 B0 FB BCS INTRTS ;Check call legal otherwise, exit -- MOS72 0216 F1AB -- MOS72 0217 F1AB 86 BC STX TEMP -- MOS72 0218 F1AD AA TAX ;Get address from table -- MOS72 0219 F1AE BD F9 FB LDAAX JMPTAB +NOTAB -- MOS72 0220 F1B1 48 PHA ;push hi byte -- MOS72 0221 F1B2 BD F2 FB LDAAX JMPTAB -- MOS72 0222 F1B5 48 PHA ;push lo byte -- MOS72 0223 F1B6 A6 BC LDX TEMP ;Restore argument -- MOS72 0224 F1B8 60 RTS ;enter routine -- MOS72 0225 F1B9 ] -- MOS72 0226 F1B9 -- MOS72 0227 F1B9 TTL C.F.S. Main Routines - LOAD -- MOS72 0228 F1B9 OPT &01 -- MOS72 0229 F1B9 -- MOS72 0230 F1B9 -- MOS72 0231 F1B9 ;*********** -- MOS72 0232 F1B9 ;* L O A D * -- MOS72 0233 F1B9 ;*********** -- MOS72 0234 F1B9 -- MOS72 0235 F1B9 -- MOS72 0236 F1B9 ;On entry A NZ => load from OSFILE -- MOS72 0237 F1B9 ; A =0 => load and run -- MOS72 0238 F1B9 ;Differentiating between these is necessary -- MOS72 0239 F1B9 ;so that the protection bit in the flags -- MOS72 0240 F1B9 ;byte can be checked. -- MOS72 0241 F1B9 -- MOS72 0242 F1B9 -- MOS72 0243 F1B9 [ MOS125 = &FF -- MOS72 0358 F1B9 ] -- MOS72 0359 F1B9 -- MOS72 0360 F1B9 -- MOS72 0361 F1B9 -- MOS72 0362 F1B9 TTL C.F.S. Main Routines - FILEGO -- MOS72 0363 F1B9 OPT &01 -- MOS72 0364 F1B9 -- MOS72 0365 F1B9 -- MOS72 0366 F1B9 GETFLN -- MOS72 0367 F1B9 -- MOS72 0368 F1B9 ;X/Y -> start of file name -- MOS72 0369 F1B9 -- MOS72 0370 F1B9 -- MOS72 0371 F1B9 MOVFT -- MOS72 0372 F1B9 -- MOS72 0373 F1B9 ;Moves file title from ptr. pointed to by X,Y (lo,hi) -- MOS72 0374 F1B9 ;to FILNAM. -- MOS72 0375 F1B9 -- MOS72 0376 F1B9 ; SEI -- MOS72 0377 F1B9 86 F2 STX WORK -- MOS72 0378 F1BB 84 F3 STY WORK +&01 -- MOS72 0379 F1BD A0 00 LDYIM &00 -- MOS72 0380 F1BF 20 84 EA JSR GSINTC ;Initialise -- MOS72 0381 F1C2 A2 00 LDXIM &00 -- MOS72 0382 F1C4 20 96 EA MOVFTL JSR GSREAD MOS72 0388 F1D1 ^71 MOS72 0383 F1C7 B0 0D BCS MOVFTX MOS72 0388 F1D1 ^71 MOS72 0384 F1C9 F0 08 BEQ STRERR MOS72 0388 F1D1 ^71 MOS72 0385 F1CB 9D D2 03 STAAX FILNAM MOS72 0388 F1D1 ^71 MOS72 0386 F1CE E8 INX MOS72 0388 F1D1 ^71 MOS72 0387 F1CF E0 0B CPXIM FTSIZE MOS72 0388 F1D1 ^71 MOS72 0388 F1D1 D0 F1 BNE MOVFTL MOS72 0383 F1C7 v72 MOS72 0389 F1D3 MOS72 0383 F1C7 v72 MOS72 0390 F1D3 STRNG0 MOS72 0383 F1C7 v72 MOS72 0391 F1D3 4C A4 EA STRERR JMP BADSTR MOS72 0445 F210 ^41 MOS72 0392 F1D6 MOS72 0445 F210 ^41 MOS72 0393 F1D6 A9 00 MOVFTX LDAIM &00 MOS72 0445 F210 ^41 MOS72 0394 F1D8 9D D2 03 STAAX FILNAM MOS72 0445 F210 ^41 MOS72 0395 F1DB ; CLI MOS72 0445 F210 ^41 MOS72 0396 F1DB 60 RTS MOS72 0445 F210 ^41 MOS72 0397 F1DC MOS72 0445 F210 ^41 MOS72 0398 F1DC MOS72 0445 F210 ^41 MOS72 0399 F1DC FILEGO MOS72 0445 F210 ^41 MOS72 0400 F1DC MOS72 0445 F210 ^41 MOS72 0401 F1DC ;Entry here from OSFILE. MOS72 0445 F210 ^41 MOS72 0402 F1DC MOS72 0445 F210 ^41 MOS72 0403 F1DC 48 PHA ;Store load/save indication MOS72 0445 F210 ^41 MOS72 0404 F1DD 86 C8 STX GENPTR MOS72 0445 F210 ^41 MOS72 0405 F1DF 84 C9 STY GENPTR +&01 MOS72 0445 F210 ^41 MOS72 0406 F1E1 MOS72 0445 F210 ^41 MOS72 0407 F1E1 A0 00 LDYIM &00 MOS72 0445 F210 ^41 MOS72 0408 F1E3 B1 C8 LDAIY GENPTR MOS72 0445 F210 ^41 MOS72 0409 F1E5 AA TAX ;Set ptr. to file name for MOVFT MOS72 0445 F210 ^41 MOS72 0410 F1E6 C8 INY MOS72 0445 F210 ^41 MOS72 0411 F1E7 B1 C8 LDAIY GENPTR MOS72 0445 F210 ^41 MOS72 0412 F1E9 A8 TAY MOS72 0445 F210 ^41 MOS72 0413 F1EA MOS72 0445 F210 ^41 MOS72 0414 F1EA 20 B9 F1 JSR MOVFT ;File title -> FILNAM MOS72 0445 F210 ^41 MOS72 0415 F1ED A0 02 LDYIM &02 MOS72 0445 F210 ^41 MOS72 0416 F1EF B1 C8 FILELP LDAIY GENPTR MOS72 0445 F210 ^41 MOS72 0417 F1F1 99 BC 03 STAAY INFO +BKLOAD -&02 ;Set LOAD/EXEC address in header buffer MOS72 0445 F210 ^41 MOS72 0418 F1F4 99 AE 00 STAAY BKADDR -&02 ;Optional load address stored for LOAD MOS72 0445 F210 ^41 MOS72 0419 F1F7 C8 INY MOS72 0445 F210 ^41 MOS72 0420 F1F8 C0 0A CPYIM &0A ;Ten coz 2*4 + 2 initially MOS72 0445 F210 ^41 MOS72 0421 F1FA D0 F3 BNE FILELP MOS72 0445 F210 ^41 MOS72 0422 F1FC MOS72 0445 F210 ^41 MOS72 0423 F1FC 68 PLA MOS72 0445 F210 ^41 MOS72 0424 F1FD [ MOS125 = &FF MOS72 0445 F210 ^41 MOS72 0429 F1FD | MOS72 0445 F210 ^41 MOS72 0430 F1FD D0 5D BNE FILENE MOS72 0430 F1FD v22 MOS72 0431 F1FF ] MOS72 0430 F1FD v22 MOS72 0432 F1FF MOS72 0430 F1FD v22 MOS72 0433 F1FF ;Now doing save MOS72 0430 F1FD v22 MOS72 0434 F1FF MOS72 0430 F1FD v22 MOS72 0435 F1FF 8D C6 03 FILEL2 STA INFO +BKNOLO ;Set block number in header MOS72 0430 F1FD v22 MOS72 0436 F202 8D C7 03 STA INFO +BKNOHI ;while A is zero MOS72 0430 F1FD v22 MOS72 0437 F205 B1 C8 FILEL3 LDAIY GENPTR MOS72 0430 F1FD v22 MOS72 0438 F207 99 A6 00 STAAY BKADDR -&0A ;BKADDR := data start MOS72 0430 F1FD v22 MOS72 0439 F20A C8 INY ;Also sets HIADDR which MOS72 0430 F1FD v22 MOS72 0440 F20B ;must be contiguous with BKADDR MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 126 MOS72 C.F.S. Main Routines - FILEGO MOS72 MOS72 0430 F1FD v22 MOS72 0441 F20B C0 12 CPYIM &12 MOS72 0430 F1FD v22 MOS72 0442 F20D D0 F6 BNE FILEL3 MOS72 0430 F1FD v22 MOS72 0443 F20F MOS72 0430 F1FD v22 MOS72 0444 F20F 8A TXA ;X preserved from MOVFT MOS72 0430 F1FD v22 MOS72 0445 F210 F0 C1 BEQ STRNG0 ;Drops through to SAVE if string OK MOS72 0430 F1FD v22 MOS72 0446 F212 MOS72 0430 F1FD v22 MOS72 0447 F212 MOS72 0430 F1FD v22 MOS72 0448 F212 TTL C.F.S Main Routines - SAVE MOS72 0430 F1FD v22 MOS72 0449 F212 OPT &01 MOS72 0430 F1FD v22 MOS72 0450 F212 MOS72 0430 F1FD v22 MOS72 0451 F212 ;*********** MOS72 0430 F1FD v22 MOS72 0452 F212 ;* S A V E * MOS72 0430 F1FD v22 MOS72 0453 F212 ;*********** MOS72 0430 F1FD v22 MOS72 0454 F212 MOS72 0430 F1FD v22 MOS72 0455 F212 MOS72 0430 F1FD v22 MOS72 0456 F212 MOS72 0430 F1FD v22 MOS72 0457 F212 ;Entry here from OSFILE call MOS72 0430 F1FD v22 MOS72 0458 F212 MOS72 0430 F1FD v22 MOS72 0459 F212 20 1C FB JSR SETDEF MOS72 0430 F1FD v22 MOS72 0460 F215 MOS72 0430 F1FD v22 MOS72 0461 F215 20 61 F5 JSR RECORD ;Prompt and motor ON MOS72 0430 F1FD v22 MOS72 0462 F218 MOS72 0430 F1FD v22 MOS72 0463 F218 [ TUBESW=0 MOS72 0430 F1FD v22 MOS72 0464 F218 A9 00 LDAIM TUBER ;initialise tube for reading MOS72 0430 F1FD v22 MOS72 0465 F21A 20 B0 FB JSR TBINIT MOS72 0430 F1FD v22 MOS72 0466 F21D ] MOS72 0430 F1FD v22 MOS72 0467 F21D MOS72 0430 F1FD v22 MOS72 0468 F21D 20 D5 FB JSR BUGFIX ;Put out extra char MOS72 0430 F1FD v22 MOS72 0469 F220 MOS72 0430 F1FD v22 MOS72 0470 F220 38 SAVELP SEC MOS72 0430 F1FD v22 MOS72 0471 F221 A2 FD LDXIM &FD MOS72 0430 F1FD v22 MOS72 0472 F223 [ MOS125 = &FF MOS72 0430 F1FD v22 MOS72 0475 F223 | MOS72 0430 F1FD v22 MOS72 0476 F223 B5 B7 SAVEL1 LDAZX (HIADDR -&FD):AND:&FF MOS72 0430 F1FD v22 MOS72 0477 F225 F5 B3 SBCZX (BKADDR -&FD):AND:&FF MOS72 0430 F1FD v22 MOS72 0478 F227 ] MOS72 0430 F1FD v22 MOS72 0479 F227 9D CB 02 STAAX INFO +BKSZEL-&FD ;Note corrupts Flags byte MOS72 0430 F1FD v22 MOS72 0480 F22A E8 INX MOS72 0430 F1FD v22 MOS72 0481 F22B D0 F6 BNE SAVEL1 ;Do HIADDR - BKADDR MOS72 0430 F1FD v22 MOS72 0482 F22D A8 TAY MOS72 0430 F1FD v22 MOS72 0483 F22E D0 0A BNE SAVEL2 ;Msb non-zero => not last block MOS72 0430 F1FD v22 MOS72 0484 F230 MOS72 0430 F1FD v22 MOS72 0485 F230 ;Now: IF $0100 < block size THEN block size := $0100, MOS72 0430 F1FD v22 MOS72 0486 F230 ; not last block MOS72 0430 F1FD v22 MOS72 0487 F230 ; ELSE last block MOS72 0430 F1FD v22 MOS72 0488 F230 MOS72 0430 F1FD v22 MOS72 0489 F230 [ MOS125 = &FF MOS72 0430 F1FD v22 MOS72 0502 F230 | MOS72 0430 F1FD v22 MOS72 0503 F230 CD C8 03 CMP INFO +BKSZEL ;Note A = X = Y = 0 MOS72 0430 F1FD v22 MOS72 0504 F233 2A ROLA ;if L=0 then C := (H<=1) else C := (H==0) MOS72 0430 F1FD v22 MOS72 0505 F234 CD C9 03 CMP INFO +BKSZEH ;use constant C=1 from CMP MOS72 0430 F1FD v22 MOS72 0506 F237 6A RORA ;A = $80 if <=$0100, A = 0 if more MOS72 0430 F1FD v22 MOS72 0507 F238 30 08 BMI SAVEL3 ;if last block then don't clamp block size MOS72 0430 F1FD v22 MOS72 0508 F23A SAVEL2 ;X = 0, A = Y = undefined MOS72 0430 F1FD v22 MOS72 0509 F23A 8A TXA ;clear last block flag MOS72 0430 F1FD v22 MOS72 0510 F23B 8E C8 03 STX INFO +BKSZEL ;Default block size = $0100 MOS72 0430 F1FD v22 MOS72 0511 F23E E8 INX MOS72 0430 F1FD v22 MOS72 0512 F23F 8E C9 03 STX INFO +BKSZEH ;Note N=0 preserved by WRBLOK MOS72 0430 F1FD v22 MOS72 0513 F242 8D CA 03 SAVEL3 STA INFO +BKFLAG ;WRBLOK clobbers A, X MOS72 0430 F1FD v22 MOS72 0514 F245 ] MOS72 0430 F1FD v22 MOS72 0515 F245 MOS72 0430 F1FD v22 MOS72 0516 F245 20 1C F8 JSR WRBLOK ;Write out data + header MOS72 0430 F1FD v22 MOS72 0517 F248 30 11 BMI SAVFIN ;Last block => finished MOS72 0430 F1FD v22 MOS72 0518 F24A MOS72 0430 F1FD v22 MOS72 0519 F24A 20 61 F9 JSR ADDBKA ;Add block size to address MOS72 0430 F1FD v22 MOS72 0520 F24D MOS72 0430 F1FD v22 MOS72 0521 F24D EE C6 03 INC INFO +BKNOLO MOS72 0430 F1FD v22 MOS72 0522 F250 D0 CE BNE SAVELP MOS72 0430 F1FD v22 MOS72 0523 F252 EE C7 03 INC INFO +BKNOHI ;Inc. block no. for next time MOS72 0430 F1FD v22 MOS72 0524 F255 D0 C9 BNE SAVELP ;Assumed always +ve MOS72 0430 F1FD v22 MOS72 0525 F257 MOS72 0430 F1FD v22 MOS72 0526 F257 [ MOS125 = &FF MOS72 0430 F1FD v22 MOS72 0527 F257 | MOS72 0430 F1FD v22 MOS72 0528 F257 OLDKEY ;force old key state MOS72 0430 F1FD v22 MOS72 0529 F257 84 EC STY CKEY ;CKEY := 0 MOS72 0430 F1FD v22 MOS72 0530 F259 86 ED STX OKEY ;force old key state MOS72 0430 F1FD v22 MOS72 0531 F25B SAVFIN ;Exit from SAVE MOS72 0430 F1FD v22 MOS72 0532 F25B 60 RTS MOS72 0430 F1FD v22 MOS72 0533 F25C MOS72 0430 F1FD v22 MOS72 0534 F25C C9 FF FILENE CMPIM &FF MOS72 0535 F25E ^7B MOS72 0535 F25E D0 FB BNE SAVFIN -- MOS72 0536 F260 -- MOS72 0537 F260 LOADGO -- MOS72 0538 F260 -- MOS72 0539 F260 08 PHP ;Store interrupt status -- MOS72 0540 F261 48 PHA ;Store indication of load or load/run -- MOS72 0541 F262 20 1C FB JSR SETDEF ;Set defaults if nesc. -- MOS72 0542 F265 -- MOS72 0543 F265 AD C2 03 LDA INFO +BKEXEC -- MOS72 0544 F268 48 PHA ;EQ=> use addr. from C.line or OSFILE -- MOS72 0545 F269 -- MOS72 0546 F269 20 66 F6 JSR SRCH0 ;Find file on tape. -- MOS72 0547 F26C LOADL6 -- MOS72 0548 F26C -- MOS72 0549 F26C 68 PLA -- MOS72 0550 F26D F0 17 BEQ LOADLB ;Use load address from command line or OSFILE MOS72 0550 F26D v68 MOS72 0551 F26F MOS72 0550 F26D v68 MOS72 0552 F26F ;Move load address from OSFILE command block MOS72 0550 F26D v68 MOS72 0553 F26F ;and check if is $FFFFFFFF, in which case MOS72 0550 F26D v68 MOS72 0554 F26F ;give BAD ADDRESS error MOS72 0550 F26D v68 MOS72 0555 F26F MOS72 0550 F26D v68 MOS72 0556 F26F A2 03 LDXIM &03 MOS72 0550 F26D v68 MOS72 0557 F271 38 SEC MOS72 0550 F26D v68 MOS72 0558 F272 LOADL1 MOS72 0550 F26D v68 MOS72 0559 F272 BD BE 03 LDAAX INFO +BKLOAD ;Address from command block MOS72 0550 F26D v68 MOS72 0560 F275 95 B0 STAAX BKADDR MOS72 0550 F26D v68 MOS72 0561 F277 90 02 BCC LOADL2 ;not ADCIM &00 as V may be in use MOS72 0550 F26D v68 MOS72 0562 F279 C9 FF CMPIM &FF MOS72 0550 F26D v68 MOS72 0563 F27B LOADL2 MOS72 0550 F26D v68 MOS72 0564 F27B CA DEX MOS72 0550 F26D v68 MOS72 0565 F27C 10 F4 BPL LOADL1 MOS72 0550 F26D v68 MOS72 0566 F27E MOS72 0550 F26D v68 MOS72 0567 F27E 90 06 BCC LOADLB ;If CS, all bytes are $FF => error MOS72 0550 F26D v68 MOS72 0568 F280 MOS72 0550 F26D v68 MOS72 0569 F280 20 DD FA JSR BEEPOF ;Motor off/beep MOS72 0550 F26D v68 MOS72 0570 F283 4C F7 E2 JMP MBADHX MOS72 0550 F26D v68 MOS72 0571 F286 MOS72 0550 F26D v68 MOS72 0572 F286 AD CA 03 LOADLB LDA INFO +BKFLAG ;Check protection bit -- MOS72 0573 F289 4A LSRA ;CS -> prot. CC -> unprot -- MOS72 0574 F28A 68 PLA ;Check if loading and running -- MOS72 0575 F28B 90 18 BCC LOADLA ;Not protected -> carry on MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 127 MOS72 C.F.S Main Routines - SAVE MOS72 MOS72 0575 F28B v67 MOS72 0576 F28D F0 0C BEQ LOADLC ;Yes => carry on MOS72 0575 F28B v67 MOS72 0577 F28F MOS72 0575 F28B v67 MOS72 0578 F28F 20 E7 FA PROTER JSR CASMOF ;Turn motor off MOS72 0575 F28B v67 MOS72 0579 F292 ;Also called from RDBFER MOS72 0575 F28B v67 MOS72 0580 F292 MOS72 0575 F28B v67 MOS72 0581 F292 00 BRK MOS72 0575 F28B v67 MOS72 0582 F293 D5 = CFSERL MOS72 0575 F28B v67 MOS72 0583 F294 4C 6F 63 = "Locked" MOS72 0575 F28B v67 MOS72 0584 F29A 00 = &00 MOS72 0575 F28B v67 MOS72 0585 F29B MOS72 0575 F28B v67 MOS72 0586 F29B LOADLC MOS72 0575 F28B v67 MOS72 0587 F29B A9 03 LDAIM &03 MOS72 0575 F28B v67 MOS72 0588 F29D 8D 58 02 STA CRIT ;Loading/running & prot., so disable ESCAPE and trap BREAK MOS72 0575 F28B v67 MOS72 0589 F2A0 D0 03 BNE LOADLA ;always branch MOS72 0575 F28B v67 MOS72 0590 F2A2 MOS72 0575 F28B v67 MOS72 0591 F2A2 20 6C F6 LODRTR JSR SEARCH ;Search for current block (BLOKNO) MOS72 0609 F2BC ^64 MOS72 0592 F2A5 LOADLA MOS72 0609 F2BC ^64 MOS72 0593 F2A5 A9 30 LDAIM NIGBIT MOS72 0618 F2CC ^57 MOS72 0594 F2A7 25 BB AND USFLGS MOS72 0618 F2CC ^57 MOS72 0595 F2A9 F0 04 BEQ LOADL8 ;If ignore set, just read block MOS72 0618 F2CC ^57 MOS72 0596 F2AB A5 C1 LDA HDRCRC ;Check hdr. checksum MOS72 0618 F2CC ^57 MOS72 0597 F2AD MOS72 0618 F2CC ^57 MOS72 0598 F2AD ;Don't start bg job if header CRC is no good, MOS72 0618 F2CC ^57 MOS72 0599 F2AD ;otherwise data may be loaded somewhere strange MOS72 0618 F2CC ^57 MOS72 0600 F2AD MOS72 0618 F2CC ^57 MOS72 0601 F2AD D0 0A BNE LOADL7 MOS72 0618 F2CC ^57 MOS72 0602 F2AF 98 LOADL8 TYA MOS72 0618 F2CC ^57 MOS72 0603 F2B0 48 PHA ;Store "Loading" flag MOS72 0618 F2CC ^57 MOS72 0604 F2B1 20 AE FB JSR TWINIT ;Initialise tube for writing if nesc. MOS72 0618 F2CC ^57 MOS72 0605 F2B4 68 PLA MOS72 0618 F2CC ^57 MOS72 0606 F2B5 A8 TAY ;Restore "Loading" flag MOS72 0618 F2CC ^57 MOS72 0607 F2B6 20 05 F8 JSR RDBLOK MOS72 0618 F2CC ^57 MOS72 0608 F2B9 20 AA F9 LOADL7 JSR LODHDR ;Print header and error msgs. MOS72 0618 F2CC ^57 MOS72 0609 F2BC D0 E4 BNE LODRTR ;=> retry MOS72 0618 F2CC ^57 MOS72 0610 F2BE MOS72 0618 F2CC ^57 MOS72 0611 F2BE 20 5E FB JSR NXTBLK ;Next block := blk. found + 1 MOS72 0618 F2CC ^57 MOS72 0612 F2C1 2C CA 03 BIT INFO +BKFLAG MOS72 0618 F2CC ^57 MOS72 0613 F2C4 30 08 BMI LOADEX ;Just loaded last block => finish MOS72 0618 F2CC ^57 MOS72 0614 F2C6 MOS72 0618 F2CC ^57 MOS72 0615 F2C6 20 61 F9 JSR ADDBKA ;Add block size to BKADDR MOS72 0618 F2CC ^57 MOS72 0616 F2C9 MOS72 0618 F2CC ^57 MOS72 0617 F2C9 20 B1 F7 JSR RDHEAD MOS72 0618 F2CC ^57 MOS72 0618 F2CC D0 D7 BNE LOADLA ;Always jump MOS72 0613 F2C4 v77 MOS72 0619 F2CE MOS72 0613 F2C4 v77 MOS72 0620 F2CE LOADEX MOS72 0613 F2C4 v77 MOS72 0621 F2CE [ LENSW =0 ;Alter OSFILE control block MOS72 0613 F2C4 v77 MOS72 0622 F2CE A0 0A LDYIM &0A ;Length offset in OSFILE block -- MOS72 0623 F2D0 A5 CC LDA FSIZE ;File size set in PRTHDR -- MOS72 0624 F2D2 91 C8 STAIY GENPTR ;Note GENPTR kept from OSFILE -- MOS72 0625 F2D4 C8 INY -- MOS72 0626 F2D5 A5 CD LDA FSIZE + 1 -- MOS72 0627 F2D7 91 C8 STAIY GENPTR -- MOS72 0628 F2D9 A9 00 LDAIM &00 ;Set high bytes of length = 0 -- MOS72 0629 F2DB C8 INY -- MOS72 0630 F2DC 91 C8 STAIY GENPTR -- MOS72 0631 F2DE C8 INY -- MOS72 0632 F2DF 91 C8 STAIY GENPTR -- MOS72 0633 F2E1 ] -- MOS72 0634 F2E1 -- MOS72 0635 F2E1 28 PLP ;Restore interrupt status -- MOS72 0636 F2E2 -- MOS72 0637 F2E2 FINOP -- MOS72 0638 F2E2 -- MOS72 0639 F2E2 20 DD FA JSR BEEPOF ;Motor OFF/BEEP -- MOS72 0640 F2E5 -- MOS72 0641 F2E5 24 BA NOOLN1 BIT ERRSW ;If error taken place, already new line -- MOS72 0642 F2E7 30 07 BMI FINOPX MOS72 0642 F2E7 v78 MOS72 0643 F2E9 08 NOOLIN PHP MOS72 0642 F2E7 v78 MOS72 0644 F2EA 20 3B FA JSR MSGOUT MOS72 0642 F2E7 v78 MOS72 0645 F2ED 0D = MCR MOS72 0642 F2E7 v78 MOS72 0646 F2EE 00 = &00 ;Print new line if msgs on MOS72 0642 F2E7 v78 MOS72 0647 F2EF 28 PLP MOS72 0642 F2E7 v78 MOS72 0648 F2F0 60 FINOPX RTS -- MOS72 0649 F2F1 -- MOS72 0650 F2F1 -- MOS72 0651 F2F1 -- MOS72 0652 F2F1 ] -- MOS72 0653 F2F1 -- MOS72 0654 F2F1 -- MOS72 0655 F2F1 TTL C.F.S. Main Routines - RUN -- MOS72 0656 F2F1 OPT &01 -- MOS72 0657 F2F1 -- MOS72 0658 F2F1 RUN -- MOS72 0659 F2F1 20 B9 F1 JSR GETFLN -- MOS72 0660 F2F4 [ MOS125 = &FF -- MOS72 0663 F2F4 | -- MOS72 0664 F2F4 ;initialise GENPTR as this is not an OSFILE load -- MOS72 0665 F2F4 A2 C2 LDXIM FSIZE - &0A ;note value assumed nonzero -- MOS72 0666 F2F6 86 C8 STX GENPTR ;so LOADEX overwrites FSIZE with itself -- MOS72 0667 F2F8 85 C9 STA GENPTR+1 ;A=0 from GETFLN -- MOS72 0668 F2FA 8E C2 03 STX INFO +BKEXEC ;=> >0 loads file to header addr -- MOS72 0669 F2FD ] -- MOS72 0670 F2FD -- MOS72 0671 F2FD ;Note, is assumed here that A = 0 from GETFLN -- MOS72 0672 F2FD ;since LOADGO tests A -- MOS72 0673 F2FD -- MOS72 0674 F2FD [ MOS125 = &7F -- MOS72 0675 F2FD [ STARGO = &00 -- MOS72 0676 F2FD 84 E6 STY CLIRY ;use temp, stack is snooped by CompROMs during LOADGO -- MOS72 0677 F2FF 20 60 F2 JSR LOADGO ;Load file from tape -- MOS72 0678 F302 A4 E6 LDY CLIRY -- MOS72 0679 F304 RUNGO -- MOS72 0680 F304 98 TYA -- MOS72 0681 F305 20 7B E0 JSR CLIXY2 ;XY = tail ptr, A = Y on entry = offset -- MOS72 0682 F308 8E D0 02 STX TAILLO ;save pointer to command line tail -- MOS72 0683 F30B C8 INY ;permute so a page of OS ROM becomes zero -- MOS72 0684 F30C 8C D1 02 STY TAILHI ;marking all other addresses valid -- MOS72 0685 F30F A8 TAY ;set up registers to simulate entry from Acorn DFS -- MOS72 0686 F310 A2 FF LDXIM &FF ;from filename comparison -- MOS72 0687 F312 38 SEC -- MOS72 0688 F313 [ TUBESW=0 -- MOS72 0689 F313 2C 7A 02 BIT TUBE -- MOS72 0690 F316 10 0A BPL NOTUB1 ;No tube - jump to IO proc. address MOS72 0690 F316 v75 MOS72 0691 F318 MOS72 0690 F316 v75 MOS72 0692 F318 AD C4 03 LDA INFO +BKEXEC +&02 ;Check if execution address MOS72 0690 F316 v75 MOS72 0693 F31B 2D C5 03 AND INFO +BKEXEC +&03 ;of file is accross tube MOS72 0690 F316 v75 MOS72 0694 F31E C9 FF CMPIM &FF MOS72 0690 F316 v75 MOS72 0695 F320 D0 05 BNE RUNL1 ;Yes, set up tube call MOS72 0690 F316 v75 MOS72 0696 F322 A9 01 NOTUB1 LDAIM &01 ;enter with A=1, X=&FF, Y=arg offset, C=1 MOS72 0695 F320 v7A MOS72 0697 F324 6C C2 03 JMI INFO +BKEXEC ;No, just jump MOS72 0695 F320 v7A MOS72 0698 F327 MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 128 MOS72 C.F.S. Main Routines - RUN MOS72 MOS72 0695 F320 v7A MOS72 0699 F327 A2 C2 RUNL1 LDXIM INFO +BKEXEC ;Point to exec. address -- MOS72 0700 F329 A0 03 LDYIM /(INFO +BKEXEC ) -- MOS72 0701 F32B A9 04 LDAIM TUBEX ;=> execute to tube -- MOS72 0702 F32D 4C BA FB JMP TBINT1 ;Claim tube and jump to address -- MOS72 0703 F330 | -- MOS72 0706 F330 ] -- MOS72 0707 F330 | -- MOS72 0729 F330 ] -- MOS72 0730 F330 | -- MOS72 0752 F330 ] -- MOS72 0753 F330 -- MOS72 0754 F330 -- MOS72 0755 F330 TTL C.F.S Main Routines - CAT -- MOS72 0756 F330 OPT &01 -- MOS72 0757 F330 -- MOS72 0758 F330 -- MOS72 0759 F330 ;********* -- MOS72 0760 F330 ;* C A T * -- MOS72 0761 F330 ;********* -- MOS72 0762 F330 -- MOS72 0763 F330 -- MOS72 0764 F330 -- MOS72 0765 F330 CAT -- MOS72 0766 F330 -- MOS72 0767 F330 ;Entered from MOS with two args -- MOS72 0768 F330 ;in X and Y as per OPT. These are not used. -- MOS72 0769 F330 -- MOS72 0770 F330 A9 08 LDAIM CATBIT -- MOS72 0771 F332 20 49 F3 JSR ORSTAT -- MOS72 0772 F335 20 1C FB JSR SETDEF ;Set message type etc. -- MOS72 0773 F338 A9 00 LDAIM &00 ;Indicate verify only -- MOS72 0774 F33A 20 4D F3 JSR LOOK ;In CFS, will never return -- MOS72 0775 F33D ;In SFS, will return -- MOS72 0776 F33D 20 F1 FA JSR RELEAS ;So in SFS release RS423 -- MOS72 0777 F340 ;NOTE - only release call outside CASMOF -- MOS72 0778 F340 -- MOS72 0779 F340 -- MOS72 0780 F340 A9 F7 CATOFF LDAIM NCTBIT -- MOS72 0781 F342 -- MOS72 0782 F342 25 E2 ANDSTA AND CFSTAT -- MOS72 0783 F344 85 E2 ANDSTB STA CFSTAT MOS72 0794 F34B ^77 MOS72 0784 F346 MOS72 0794 F34B ^77 MOS72 0785 F346 [ MOS125 = &FF MOS72 0794 F34B ^77 MOS72 0787 F346 ] MOS72 0794 F34B ^77 MOS72 0788 F346 60 RTS MOS72 0794 F34B ^77 MOS72 0789 F347 MOS72 0794 F34B ^77 MOS72 0790 F347 ORLST MOS72 0794 F34B ^77 MOS72 0791 F347 A9 40 LDAIM LSTBYT MOS72 0794 F34B ^77 MOS72 0792 F349 ; MOS72 0794 F34B ^77 MOS72 0793 F349 05 E2 ORSTAT ORA CFSTAT MOS72 0794 F34B ^77 MOS72 0794 F34B D0 F7 BNE ANDSTB ;Assumed always non-zero -- MOS72 0795 F34D -- MOS72 0796 F34D -- MOS72 0797 F34D -- MOS72 0798 F34D -- MOS72 0799 F34D -- MOS72 0800 F34D 48 LOOK PHA -- MOS72 0801 F34E AD 47 02 LDA SROMSW -- MOS72 0802 F351 F0 08 BEQ LOOKLR ;No SFS -> don't call SFS routines MOS72 0802 F351 v77 MOS72 0803 F353 MOS72 0802 F351 v77 MOS72 0804 F353 20 4C EE JSR SRINIT ;Initialise SERROM ptr. MOS72 0802 F351 v77 MOS72 0805 F356 [ MOS125 = &FF MOS72 0802 F351 v77 MOS72 0807 F356 ] MOS72 0802 F351 v77 MOS72 0808 F356 90 03 BCC LOOKLR MOS72 0802 F351 v77 MOS72 0809 F358 MOS72 0802 F351 v77 MOS72 0810 F358 B8 CLV ;Indicate end of rom to outside world MOS72 0802 F351 v77 MOS72 0811 F359 50 5B BVC LOOKEX MOS72 0811 F359 v24 MOS72 0812 F35B MOS72 0811 F359 v24 MOS72 0813 F35B 20 B1 F7 LOOKLR JSR RDHEAD MOS72 0811 F359 v24 MOS72 0814 F35E AD C6 03 LDA INFO +BKNOLO MOS72 0811 F359 v24 MOS72 0815 F361 85 B4 STA BLOKNO MOS72 0811 F359 v24 MOS72 0816 F363 AD C7 03 LDA INFO +BKNOHI MOS72 0811 F359 v24 MOS72 0817 F366 85 B5 STA BLOKNO +&01 MOS72 0811 F359 v24 MOS72 0818 F368 A2 FF LDXIM &FF MOS72 0811 F359 v24 MOS72 0819 F36A 8E DF 03 STX OLDFLG MOS72 0811 F359 v24 MOS72 0820 F36D E8 INX MOS72 0811 F359 v24 MOS72 0821 F36E 86 BA STX ERRSW MOS72 0811 F359 v24 MOS72 0822 F370 F0 20 BEQ LOOKL5 ;Always new line MOS72 0811 F359 v24 MOS72 0823 F372 MOS72 0811 F359 v24 MOS72 0824 F372 [ MOS125 = &FF MOS72 0811 F359 v24 MOS72 0825 F372 | MOS72 0811 F359 v24 MOS72 0826 F372 50 05 LOOKL4 BVC LOOKL3 ;Header interrupted MOS72 0811 F359 v24 MOS72 0827 F374 A9 FF LDAIM &FF MOS72 0811 F359 v24 MOS72 0828 F376 20 07 F8 JSR CHKBIN ;Check data MOS72 0811 F359 v24 MOS72 0829 F379 MOS72 0811 F359 v24 MOS72 0830 F379 A2 00 LOOKL3 LDXIM &00 MOS72 0811 F359 v24 MOS72 0831 F37B 20 CF F9 JSR CATERR ;Print errors and header MOS72 0811 F359 v24 MOS72 0832 F37E MOS72 0811 F359 v24 MOS72 0833 F37E AD 47 02 LDA SROMSW MOS72 0811 F359 v24 MOS72 0834 F381 F0 04 BEQ LOOKL9 ;In CFS -> continue MOS72 0811 F359 v24 MOS72 0835 F383 24 BB BIT USFLGS MOS72 0811 F359 v24 MOS72 0836 F385 50 36 BVC LOOKL8 ;=> short msgs and skip beween files MOS72 0811 F359 v24 MOS72 0837 F387 MOS72 0811 F359 v24 MOS72 0838 F387 2C CA 03 LOOKL9 BIT INFO +BKFLAG MOS72 0811 F359 v24 MOS72 0839 F38A 30 34 BMI LOOKLA ;Look for block zero MOS72 0811 F359 v24 MOS72 0840 F38C ] MOS72 0811 F359 v24 MOS72 0841 F38C MOS72 0811 F359 v24 MOS72 0842 F38C 20 5E FB LOOKL1 JSR NXTBLK ;Blokno := INFO +BKNO + 1 MOS72 0811 F359 v24 MOS72 0843 F38F MOS72 0811 F359 v24 MOS72 0844 F38F 20 B1 F7 JSR RDHEAD ;Read header MOS72 0811 F359 v24 MOS72 0845 F392 AD 47 02 LOOKL5 LDA SROMSW MOS72 0811 F359 v24 MOS72 0846 F395 F0 02 BEQ LOOKL7 MOS72 0811 F359 v24 MOS72 0847 F397 MOS72 0811 F359 v24 MOS72 0848 F397 ;Check V from RDHEAD MOS72 0811 F359 v24 MOS72 0849 F397 MOS72 0811 F359 v24 MOS72 0850 F397 50 1D BVC LOOKEX ;In SFS and VC => end of all ROMs MOS72 0811 F359 v24 MOS72 0851 F399 MOS72 0811 F359 v24 MOS72 0852 F399 68 LOOKL7 PLA MOS72 0811 F359 v24 MOS72 0853 F39A 48 PHA ;Check if just verifying MOS72 0811 F359 v24 MOS72 0854 F39B F0 D5 BEQ LOOKL4 ;If just verifying, continue MOS72 0811 F359 v24 MOS72 0855 F39D 20 67 FA JSR CMPFT ;Otherwise, check file titles MOS72 0811 F359 v24 MOS72 0856 F3A0 D0 16 BNE LOOKL2 ;Not the same, continue MOS72 0811 F359 v24 MOS72 0857 F3A2 A9 30 LDAIM NIGBIT MOS72 0811 F359 v24 MOS72 0858 F3A4 25 BB AND USFLGS MOS72 0811 F359 v24 MOS72 0859 F3A6 F0 0E BEQ LOOKEX ;If ignore set, just exit MOS72 0811 F359 v24 MOS72 0860 F3A8 MOS72 0811 F359 v24 MOS72 0861 F3A8 AD C6 03 LDA INFO +BKNOLO ;Otherwise, check block no. MOS72 0811 F359 v24 MOS72 0862 F3AB C5 B6 CMP SRCHBK MOS72 0811 F359 v24 MOS72 0863 F3AD D0 09 BNE LOOKL2 ;Not found ... MOS72 0811 F359 v24 MOS72 0864 F3AF AD C7 03 LDA INFO +BKNOHI MOS72 0811 F359 v24 MOS72 0865 F3B2 C5 B7 CMP SRCHBK +&01 MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 129 MOS72 C.F.S Main Routines - CAT MOS72 MOS72 0811 F359 v24 MOS72 0866 F3B4 D0 02 BNE LOOKL2 MOS72 0811 F359 v24 MOS72 0867 F3B6 68 LOOKEX PLA MOS72 0882 F3BB ^35 MOS72 0868 F3B7 MOS72 0882 F3BB ^35 MOS72 0869 F3B7 ;On exit, V indicates in CFS if header MOS72 0882 F3BB ^35 MOS72 0870 F3B7 ;interrupted by DCD. In SFS, indicates MOS72 0882 F3BB ^35 MOS72 0871 F3B7 ;if end of ROM filing system reached. MOS72 0882 F3BB ^35 MOS72 0872 F3B7 MOS72 0882 F3BB ^35 MOS72 0873 F3B7 60 RTS MOS72 0882 F3BB ^35 MOS72 0874 F3B8 MOS72 0882 F3BB ^35 MOS72 0875 F3B8 LOOKL2 MOS72 0882 F3BB ^35 MOS72 0876 F3B8 MOS72 0882 F3BB ^35 MOS72 0877 F3B8 ;Here, file not recognised. In CFS, just MOS72 0882 F3BB ^35 MOS72 0878 F3B8 ;carry on reading next block. In SFS, MOS72 0882 F3BB ^35 MOS72 0879 F3B8 ;skip to block zero of next file. MOS72 0882 F3BB ^35 MOS72 0880 F3B8 MOS72 0882 F3BB ^35 MOS72 0881 F3B8 AD 47 02 LDA SROMSW MOS72 0882 F3BB ^35 MOS72 0882 F3BB F0 B5 BEQ LOOKL4 ;In CFS, carry on MOS72 0887 F3C8 ^42 MOS72 0883 F3BD 20 E9 EE LOOKL8 JSR SRSKIP ;Not recognised => skip MOS72 0887 F3C8 ^42 MOS72 0884 F3C0 A9 FF LOOKLA LDAIM &FF MOS72 0887 F3C8 ^42 MOS72 0885 F3C2 8D C6 03 STA INFO +BKNOLO ;Look for block zero of next file MOS72 0887 F3C8 ^42 MOS72 0886 F3C5 8D C7 03 STA INFO +BKNOHI MOS72 0887 F3C8 ^42 MOS72 0887 F3C8 D0 C2 BNE LOOKL1 -- MOS72 0888 F3CA -- MOS72 0889 F3CA [ MOS125 = &FF -- MOS72 0905 F3CA ] -- MOS72 0906 F3CA -- MOS72 0907 F3CA -- MOS72 0908 F3CA TTL C.F.S Main Routines - FIND -- MOS72 0909 F3CA OPT &01 -- MOS72 0910 F3CA -- MOS72 0911 F3CA ;****** SEQUENTIAL ACCESS ****** -- MOS72 0912 F3CA -- MOS72 0913 F3CA -- MOS72 0914 F3CA -- MOS72 0915 F3CA ;*********** -- MOS72 0916 F3CA ;* F I N D * -- MOS72 0917 F3CA ;*********** -- MOS72 0918 F3CA -- MOS72 0919 F3CA -- MOS72 0920 F3CA FIND ;FIND -- MOS72 0921 F3CA -- MOS72 0922 F3CA -- MOS72 0923 F3CA ;Entered from OSFIND: -- MOS72 0924 F3CA -- MOS72 0925 F3CA ;A NZ => open -- MOS72 0926 F3CA ;b6 => file already exists and opened for read/ud -- MOS72 0927 F3CA ;A EQ => shut -- MOS72 0928 F3CA -- MOS72 0929 F3CA ;For open: X,Y -> file name lo,hi -- MOS72 0930 F3CA -- MOS72 0931 F3CA ;For shut: Y = handle. If zero, all files shut. -- MOS72 0932 F3CA -- MOS72 0933 F3CA -- MOS72 0934 F3CA -- MOS72 0935 F3CA 85 BC STA TEMP -- MOS72 0936 F3CC 8A TXA -- MOS72 0937 F3CD 48 PHA -- MOS72 0938 F3CE 98 TYA -- MOS72 0939 F3CF 48 PHA -- MOS72 0940 F3D0 A5 BC LDA TEMP -- MOS72 0941 F3D2 D0 1E BNE FINDON MOS72 0941 F3D2 v61 MOS72 0942 F3D4 MOS72 0941 F3D2 v61 MOS72 0943 F3D4 98 TYA MOS72 0941 F3D2 v61 MOS72 0944 F3D5 D0 0C BNE SHUTL1 ;Y non-zero => shut one file MOS72 0941 F3D2 v61 MOS72 0945 F3D7 ; MOS72 0941 F3D2 v61 MOS72 0946 F3D7 20 05 E3 JSR SHUTES ;shut EXEC and SPOOL files opened by CFS MOS72 0941 F3D2 v61 MOS72 0947 F3DA 20 78 F4 JSR SHUTW ;Else shut write file MOS72 0941 F3D2 v61 MOS72 0948 F3DD ; Shut read file and exit MOS72 0941 F3D2 v61 MOS72 0949 F3DD 46 E2 SHUTR LSR CFSTAT MOS72 0941 F3D2 v61 MOS72 0950 F3DF 06 E2 ASL CFSTAT ;Note assumes input bit = b0 MOS72 0941 F3D2 v61 MOS72 0951 F3E1 ; C=0 MOS72 0941 F3D2 v61 MOS72 0952 F3E1 90 0C BCC JFINDEX ;[ALWAYS jump] MOS72 0941 F3D2 v61 MOS72 0953 F3E3 ; MOS72 0941 F3D2 v61 MOS72 0954 F3E3 ; MOS72 0941 F3D2 v61 MOS72 0955 F3E3 4A SHUTL1 LSRA MOS72 0941 F3D2 v61 MOS72 0956 F3E4 B0 F7 BCS SHUTR ;Shut input file MOS72 0941 F3D2 v61 MOS72 0957 F3E6 4A LSRA MOS72 0941 F3D2 v61 MOS72 0958 F3E7 B0 03 BCS SHUTL2 ;Shut output file MOS72 0941 F3D2 v61 MOS72 0959 F3E9 MOS72 0941 F3D2 v61 MOS72 0960 F3E9 4C A4 FB JMP HNDERR ;Invalid handle MOS72 0941 F3D2 v61 MOS72 0961 F3EC MOS72 0941 F3D2 v61 MOS72 0962 F3EC 20 78 F4 SHUTL2 JSR SHUTW MOS72 0941 F3D2 v61 MOS72 0963 F3EF JFINDEX MOS72 0941 F3D2 v61 MOS72 0964 F3EF 4C 71 F4 JMP FINDEX MOS72 0941 F3D2 v61 MOS72 0965 F3F2 MOS72 0941 F3D2 v61 MOS72 0966 F3F2 MOS72 0941 F3D2 v61 MOS72 0967 F3F2 MOS72 0941 F3D2 v61 MOS72 0968 F3F2 20 B9 F1 FINDON JSR MOVFT -- MOS72 0969 F3F5 -- MOS72 0970 F3F5 24 BC BIT TEMP -- MOS72 0971 F3F7 50 3D BVC FINDO ;Find for output if b.6 = 0 MOS72 0971 F3F7 v42 MOS72 0972 F3F9 MOS72 0971 F3F7 v42 MOS72 0973 F3F9 ;Opening files already open MOS72 0971 F3F7 v42 MOS72 0974 F3F9 ;is the same as if not already open MOS72 0971 F3F7 v42 MOS72 0975 F3F9 MOS72 0971 F3F7 v42 MOS72 0976 F3F9 MOS72 0971 F3F7 v42 MOS72 0977 F3F9 ;Open for reading MOS72 0971 F3F7 v42 MOS72 0978 F3F9 ;Set handle and read in first buffer MOS72 0971 F3F7 v42 MOS72 0979 F3F9 MOS72 0971 F3F7 v42 MOS72 0980 F3F9 A9 00 LDAIM &00 MOS72 0971 F3F7 v42 MOS72 0981 F3FB 8D 9E 03 STA INPTR ;Set buffer ptr. := 0 MOS72 0971 F3F7 v42 MOS72 0982 F3FE 8D DD 03 STA NEXTIN MOS72 0971 F3F7 v42 MOS72 0983 F401 8D DE 03 STA NEXTIN +&01 ;Set expected block := 0 MOS72 0971 F3F7 v42 MOS72 0984 F404 MOS72 0971 F3F7 v42 MOS72 0985 F404 A9 3E LDAIM NECBIT ;End of file/last byte unset/input file closed MOS72 0971 F3F7 v42 MOS72 0986 F406 20 42 F3 JSR ANDSTA MOS72 0971 F3F7 v42 MOS72 0987 F409 MOS72 0971 F3F7 v42 MOS72 0988 F409 20 0F FB JSR SETSDF ;Set seq. access default MOS72 0971 F3F7 v42 MOS72 0989 F40C MOS72 0971 F3F7 v42 MOS72 0990 F40C 08 PHP ;Store interrupt status MOS72 0971 F3F7 v42 MOS72 0991 F40D 20 66 F6 JSR SRCH0 ;Find file, first block. MOS72 0971 F3F7 v42 MOS72 0992 F410 20 EE F6 JSR RDBFRS ;Check hdr. read ok, and get first bfr. MOS72 0971 F3F7 v42 MOS72 0993 F413 28 PLP ;Restore interrupt status MOS72 0971 F3F7 v42 MOS72 0994 F414 MOS72 0971 F3F7 v42 MOS72 0995 F414 A2 FF LDXIM &FF MOS72 0971 F3F7 v42 MOS72 0996 F416 E8 FINDL5 INX ;Make file name found = file name MOS72 0971 F3F7 v42 MOS72 0997 F417 BD B2 03 LDAAX INFO ;for subsequent block reads MOS72 0971 F3F7 v42 MOS72 0998 F41A 9D A7 03 STAAX INFILE ;so that OPENIN "" locks onto one filet block. MOS72 0971 F3F7 v42 MOS72 0999 F41D D0 F7 BNE FINDL5 MOS72 0971 F3F7 v42 MOS72 1000 F41F MOS72 0971 F3F7 v42 MOS72 1001 F41F A9 01 LDAIM INOPEN MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 130 MOS72 C.F.S Main Routines - FIND MOS72 MOS72 0971 F3F7 v42 MOS72 1002 F421 20 49 F3 JSR ORSTAT MOS72 0971 F3F7 v42 MOS72 1003 F424 AD EA 02 LDA INBSZE MOS72 0971 F3F7 v42 MOS72 1004 F427 0D EB 02 ORA INBSZE +&01 MOS72 0971 F3F7 v42 MOS72 1005 F42A D0 03 BNE FINDL6 ;If non-empty, don't worry MOS72 0971 F3F7 v42 MOS72 1006 F42C 20 47 F3 JSR ORLST ;Otherwise, at end of file MOS72 0971 F3F7 v42 MOS72 1007 F42F MOS72 0971 F3F7 v42 MOS72 1008 F42F A9 01 FINDL6 LDAIM INHAND MOS72 0971 F3F7 v42 MOS72 1009 F431 0D 47 02 ORA SROMSW ;If in SFS, return 3 MOS72 0971 F3F7 v42 MOS72 1010 F434 D0 39 BNE OPENEX ;Return input handle MOS72 0971 F3F7 v42 MOS72 1011 F436 MOS72 0971 F3F7 v42 MOS72 1012 F436 MOS72 0971 F3F7 v42 MOS72 1013 F436 MOS72 0971 F3F7 v42 MOS72 1014 F436 8A FINDO TXA ;Can't openout "" MOS72 1010 F434 v46 MOS72 1015 F437 D0 03 BNE FINABC MOS72 1010 F434 v46 MOS72 1016 F439 4C A4 EA JMP BADSTR MOS72 1010 F434 v46 MOS72 1017 F43C MOS72 1010 F434 v46 MOS72 1018 F43C A2 FF FINABC LDXIM &FF MOS72 1010 F434 v46 MOS72 1019 F43E E8 FINDL2 INX MOS72 1010 F434 v46 MOS72 1020 F43F BD D2 03 LDAAX FILNAM ;Store output file name MOS72 1010 F434 v46 MOS72 1021 F442 9D 80 03 STAAX OUTHDR MOS72 1010 F434 v46 MOS72 1022 F445 D0 F7 BNE FINDL2 MOS72 1010 F434 v46 MOS72 1023 F447 MOS72 1010 F434 v46 MOS72 1024 F447 A9 FF LDAIM &FF MOS72 1010 F434 v46 MOS72 1025 F449 A2 08 LDXIM &08 MOS72 1010 F434 v46 MOS72 1026 F44B 9D 8B 03 FINDL4 STAAX OUTHDR +BKLOAD -&01 MOS72 1010 F434 v46 MOS72 1027 F44E CA DEX MOS72 1010 F434 v46 MOS72 1028 F44F D0 FA BNE FINDL4 ;Set load/EXEC address to default value MOS72 1010 F434 v46 MOS72 1029 F451 MOS72 1010 F434 v46 MOS72 1030 F451 8A TXA MOS72 1010 F434 v46 MOS72 1031 F452 A2 14 LDXIM BKNOLO MOS72 1010 F434 v46 MOS72 1032 F454 MOS72 1010 F434 v46 MOS72 1033 F454 ;Set block no./block len./last bk. =0 MOS72 1010 F434 v46 MOS72 1034 F454 ;Note also sets OUTPTR which must MOS72 1010 F434 v46 MOS72 1035 F454 ;be contiguous with OUTHDR MOS72 1010 F434 v46 MOS72 1036 F454 MOS72 1010 F434 v46 MOS72 1037 F454 9D 80 03 FINDL3 STAAX OUTHDR MOS72 1010 F434 v46 MOS72 1038 F457 E8 INX MOS72 1010 F434 v46 MOS72 1039 F458 E0 1E CPXIM BKLAST +&01 MOS72 1010 F434 v46 MOS72 1040 F45A D0 F8 BNE FINDL3 ;Note carry set MOS72 1010 F434 v46 MOS72 1041 F45C 2E 97 03 ROL OUTHDR +BKSZEH ;Set hi byte of size MOS72 1010 F434 v46 MOS72 1042 F45F MOS72 1010 F434 v46 MOS72 1043 F45F 20 1C FB JSR SETDEF ;If default, print prompt MOS72 1010 F434 v46 MOS72 1044 F462 20 61 F5 JSR RECORD MOS72 1010 F434 v46 MOS72 1045 F465 20 E7 FA JSR CASMOF ;OFF for putbyte call MOS72 1010 F434 v46 MOS72 1046 F468 MOS72 1010 F434 v46 MOS72 1047 F468 A9 02 LDAIM OUTOPN MOS72 1010 F434 v46 MOS72 1048 F46A 20 49 F3 JSR ORSTAT ;Indicate file open for output MOS72 1010 F434 v46 MOS72 1049 F46D MOS72 1010 F434 v46 MOS72 1050 F46D A9 02 LDAIM OUTHND MOS72 1010 F434 v46 MOS72 1051 F46F MOS72 1010 F434 v46 MOS72 1052 F46F 85 BC OPENEX STA TEMP -- MOS72 1053 F471 FINDEX ;Common exit for PUT/GETBYTE and FIND -- MOS72 1054 F471 68 GBEXX PLA -- MOS72 1055 F472 A8 TAY -- MOS72 1056 F473 68 PLA -- MOS72 1057 F474 AA TAX -- MOS72 1058 F475 A5 BC LDA TEMP -- MOS72 1059 F477 FINDXX -- MOS72 1060 F477 60 RTS MOS72 1071 F47C ^79 MOS72 1061 F478 MOS72 1071 F47C ^79 MOS72 1062 F478 MOS72 1071 F47C ^79 MOS72 1063 F478 MOS72 1071 F47C ^79 MOS72 1064 F478 MOS72 1071 F47C ^79 MOS72 1065 F478 MOS72 1071 F47C ^79 MOS72 1066 F478 MOS72 1071 F47C ^79 MOS72 1067 F478 SHUTW MOS72 1071 F47C ^79 MOS72 1068 F478 MOS72 1071 F47C ^79 MOS72 1069 F478 A9 02 LDAIM OUTHND MOS72 1071 F47C ^79 MOS72 1070 F47A 25 E2 AND CFSTAT MOS72 1071 F47C ^79 MOS72 1071 F47C F0 F9 BEQ FINDXX ;If already shut, dont bother -- MOS72 1072 F47E -- MOS72 1073 F47E A9 00 LDAIM &00 -- MOS72 1074 F480 8D 97 03 STA OUTHDR +BKSZEH -- MOS72 1075 F483 -- MOS72 1076 F483 A9 80 LDAIM LASTBK -- MOS72 1077 F485 AE 9D 03 LDX OUTPTR -- MOS72 1078 F488 8E 96 03 STX OUTHDR +BKSZEL -- MOS72 1079 F48B 8D 98 03 STA OUTHDR +BKFLAG -- MOS72 1080 F48E 20 96 F4 JSR WRTBFR ;Write out block -- MOS72 1081 F491 A9 FD LDAIM NOUTHD -- MOS72 1082 F493 4C 42 F3 JMP ANDSTA ;Mark file as closed -- MOS72 1083 F496 -- MOS72 1084 F496 -- MOS72 1085 F496 WRTBFR ;Write out buffer -- MOS72 1086 F496 -- MOS72 1087 F496 20 0F FB JSR SETSDF ;Set sequential defaults -- MOS72 1088 F499 -- MOS72 1089 F499 A2 11 LDXIM BKLAST -BKLOAD -- MOS72 1090 F49B BD 8C 03 WRTBL3 LDAAX OUTHDR +BKLOAD MOS72 1093 F4A2 ^77 MOS72 1091 F49E 9D BE 03 STAAX INFO +BKLOAD MOS72 1093 F4A2 ^77 MOS72 1092 F4A1 CA DEX MOS72 1093 F4A2 ^77 MOS72 1093 F4A2 10 F7 BPL WRTBL3 -- MOS72 1094 F4A4 -- MOS72 1095 F4A4 ; Set buffer address for WBLOCK call -- MOS72 1096 F4A4 -- MOS72 1097 F4A4 86 B2 STX BKADDR +&02 -- MOS72 1098 F4A6 86 B3 STX BKADDR +&03 ;Output buffer is in IO proc. -- MOS72 1099 F4A8 -- MOS72 1100 F4A8 0000 T * OUTBFR:SHL: 8 -- MOS72 1101 F4A8 [ T=0 -- MOS72 1102 F4A8 E8 INX -- MOS72 1103 F4A9 86 B0 STX BKADDR ;If OUTBFR on page boundary, set lo byte = 0 -- MOS72 1104 F4AB | -- MOS72 1107 F4AB ] -- MOS72 1108 F4AB -- MOS72 1109 F4AB A9 09 LDAIM /(OUTBFR ) -- MOS72 1110 F4AD 85 B1 STA BKADDR +&01 -- MOS72 1111 F4AF -- MOS72 1112 F4AF A2 7F LDXIM OUTHDR -&01 -- MOS72 1113 F4B1 20 78 FB JSR MOVFN ;File name -> FILNAM etc. -- MOS72 1114 F4B4 8D DF 03 STA OLDFLG -- MOS72 1115 F4B7 -- MOS72 1116 F4B7 20 85 FB JSR MOTONW ;Motor on and select output drive -- MOS72 1117 F4BA 20 D5 FB JSR BUGFIX -- MOS72 1118 F4BD 20 1C F8 JSR WBLOCK ;Write out block -- MOS72 1119 F4C0 EE 94 03 INC OUTHDR +BKNOLO ;Next block -- MOS72 1120 F4C3 D0 03 BNE WRTBL4 MOS72 1120 F4C3 v7C MOS72 1121 F4C5 EE 95 03 INC OUTHDR +BKNOHI MOS72 1120 F4C3 v7C MOS72 1122 F4C8 60 WRTBL4 RTS -- MOS72 1123 F4C9 -- MOS72 1124 F4C9 MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 131 MOS72 C.F.S Main Routines - FIND MOS72 -- MOS72 1125 F4C9 -- MOS72 1126 F4C9 -- MOS72 1127 F4C9 -- MOS72 1128 F4C9 -- MOS72 1129 F4C9 -- MOS72 1130 F4C9 -- MOS72 1131 F4C9 TTL C.F.S. Main Routines - GETBYTE -- MOS72 1132 F4C9 OPT &01 -- MOS72 1133 F4C9 -- MOS72 1134 F4C9 -- MOS72 1135 F4C9 ;****************** -- MOS72 1136 F4C9 ;* G E T B Y T E * -- MOS72 1137 F4C9 ;****************** -- MOS72 1138 F4C9 -- MOS72 1139 F4C9 -- MOS72 1140 F4C9 GETBYT -- MOS72 1141 F4C9 -- MOS72 1142 F4C9 8A TXA -- MOS72 1143 F4CA 48 PHA -- MOS72 1144 F4CB 98 TYA -- MOS72 1145 F4CC 48 PHA -- MOS72 1146 F4CD A9 01 LDAIM INHAND -- MOS72 1147 F4CF 20 93 FB JSR CHKHND ;Is handle open ? -- MOS72 1148 F4D2 -- MOS72 1149 F4D2 A5 E2 LDA CFSTAT -- MOS72 1150 F4D4 0A ASLA -- MOS72 1151 F4D5 B0 4F BCS GBEOF ;=> Going past end of file MOS72 1151 F4D5 v30 MOS72 1152 F4D7 0A ASLA MOS72 1151 F4D5 v30 MOS72 1153 F4D8 90 09 BCC GBLF ;=> Not getting last byte MOS72 1151 F4D5 v30 MOS72 1154 F4DA MOS72 1151 F4D5 v30 MOS72 1155 F4DA ;Here indicate next GB call MOS72 1151 F4D5 v30 MOS72 1156 F4DA ;goes off end of file MOS72 1151 F4D5 v30 MOS72 1157 F4DA MOS72 1151 F4D5 v30 MOS72 1158 F4DA A9 80 LDAIM EOFBIT MOS72 1151 F4D5 v30 MOS72 1159 F4DC 20 49 F3 JSR ORSTAT MOS72 1151 F4D5 v30 MOS72 1160 F4DF MOS72 1151 F4D5 v30 MOS72 1161 F4DF ;Carry still set from above MOS72 1151 F4D5 v30 MOS72 1162 F4DF MOS72 1151 F4D5 v30 MOS72 1163 F4DF A9 FE LDAIM ENDBYT ;Byte after end of file MOS72 1151 F4D5 v30 MOS72 1164 F4E1 B0 38 BCS GBEXY MOS72 1151 F4D5 v30 MOS72 1165 F4E3 MOS72 1151 F4D5 v30 MOS72 1166 F4E3 AE 9E 03 GBLF LDX INPTR MOS72 1151 F4D5 v30 MOS72 1167 F4E6 E8 INX MOS72 1151 F4D5 v30 MOS72 1168 F4E7 EC EA 02 CPX INBSZE ;Is last byte of buffer ? MOS72 1151 F4D5 v30 MOS72 1169 F4EA D0 2A BNE GBLDE ;Nope -> continue MOS72 1151 F4D5 v30 MOS72 1170 F4EC MOS72 1151 F4D5 v30 MOS72 1171 F4EC MOS72 1151 F4D5 v30 MOS72 1172 F4EC 2C EC 02 BIT BUFFLG ;Check if in last block. If so, are reading MOS72 1151 F4D5 v30 MOS72 1173 F4EF 30 22 BMI GBLH ;last byte of last block => exit MOS72 1151 F4D5 v30 MOS72 1174 F4F1 MOS72 1151 F4D5 v30 MOS72 1175 F4F1 ;Read last byte of block. NOTE this is kept in a location MOS72 1151 F4D5 v30 MOS72 1176 F4F1 ;separate from the rest of the block buffer, so that if the MOS72 1151 F4D5 v30 MOS72 1177 F4F1 ;next block being read aborts and corrupts the block buffer, MOS72 1151 F4D5 v30 MOS72 1178 F4F1 ;a subsequent retry will still provide the last byte of the MOS72 1151 F4D5 v30 MOS72 1179 F4F1 ;previous block. The variable FINBYT is updated in RDBFER after MOS72 1151 F4D5 v30 MOS72 1180 F4F1 ;the background block read has succesfully completed. MOS72 1151 F4D5 v30 MOS72 1181 F4F1 MOS72 1151 F4D5 v30 MOS72 1182 F4F1 AD ED 02 LDA FINBYT MOS72 1151 F4D5 v30 MOS72 1183 F4F4 48 PHA ;Store final byte of this block MOS72 1151 F4D5 v30 MOS72 1184 F4F5 20 0F FB JSR SETSDF ;Set sequential defaults MOS72 1151 F4D5 v30 MOS72 1185 F4F8 08 PHP ;Store I'rupt status MOS72 1151 F4D5 v30 MOS72 1186 F4F9 20 E6 F6 JSR RDBFER ;Read buffer for next GETBYTE call MOS72 1151 F4D5 v30 MOS72 1187 F4FC 28 PLP ;Restore I'rupt status MOS72 1151 F4D5 v30 MOS72 1188 F4FD 68 PLA ;Restore final byte of previous buffer MOS72 1151 F4D5 v30 MOS72 1189 F4FE 85 BC STA TEMP ;Store for later use MOS72 1151 F4D5 v30 MOS72 1190 F500 MOS72 1151 F4D5 v30 MOS72 1191 F500 18 CLC ;Prepare for non-end of file exit MOS72 1151 F4D5 v30 MOS72 1192 F501 2C EC 02 BIT BUFFLG MOS72 1151 F4D5 v30 MOS72 1193 F504 10 17 BPL GBEXIT ;Exit, result = TEMP, carry clear MOS72 1151 F4D5 v30 MOS72 1194 F506 MOS72 1151 F4D5 v30 MOS72 1195 F506 AD EA 02 LDA INBSZE ;If here, is last block MOS72 1151 F4D5 v30 MOS72 1196 F509 0D EB 02 ORA INBSZE +&01 MOS72 1151 F4D5 v30 MOS72 1197 F50C D0 0F BNE GBEXIT ;Last block, is not empty MOS72 1151 F4D5 v30 MOS72 1198 F50E 20 47 F3 JSR ORLST ;If is last block, and empty MOS72 1151 F4D5 v30 MOS72 1199 F511 D0 0A BNE GBEXIT ;then this is the last byte MOS72 1151 F4D5 v30 MOS72 1200 F513 ;So set last byte bit and exit, C = 0 MOS72 1151 F4D5 v30 MOS72 1201 F513 MOS72 1151 F4D5 v30 MOS72 1202 F513 GBLH MOS72 1151 F4D5 v30 MOS72 1203 F513 20 47 F3 JSR ORLST ;Otherwise, reading last byte. MOS72 1151 F4D5 v30 MOS72 1204 F516 MOS72 1151 F4D5 v30 MOS72 1205 F516 ;So exit, carry clear MOS72 1151 F4D5 v30 MOS72 1206 F516 MOS72 1151 F4D5 v30 MOS72 1207 F516 CA GBLDE DEX MOS72 1151 F4D5 v30 MOS72 1208 F517 18 CLC ;Carry clear unless byte AFTER last byte of file MOS72 1151 F4D5 v30 MOS72 1209 F518 BD 00 0A LDAAX INBUFR ;GET BYTE ! MOS72 1151 F4D5 v30 MOS72 1210 F51B 85 BC GBEXY STA TEMP MOS72 1151 F4D5 v30 MOS72 1211 F51D EE 9E 03 GBEXIT INC INPTR ;Inc. buffer ptr. for next time MOS72 1151 F4D5 v30 MOS72 1212 F520 4C 71 F4 JMP GBEXX ;Share exit with PUTBYT MOS72 1151 F4D5 v30 MOS72 1213 F523 MOS72 1151 F4D5 v30 MOS72 1214 F523 [ MOS125 = &FF MOS72 1151 F4D5 v30 MOS72 1215 F523 | MOS72 1151 F4D5 v30 MOS72 1216 F523 COPYR ;here to save a byte MOS72 1151 F4D5 v30 MOS72 1217 F523 29 = ")" MOS72 1151 F4D5 v30 MOS72 1218 F524 43 = "C" MOS72 1151 F4D5 v30 MOS72 1219 F525 28 = "(" ;BRK forms terminator MOS72 1151 F4D5 v30 MOS72 1220 F526 ] MOS72 1151 F4D5 v30 MOS72 1221 F526 MOS72 1151 F4D5 v30 MOS72 1222 F526 00 GBEOF BRK -- MOS72 1223 F527 DF = CFSERD -- MOS72 1224 F528 45 = "E" -- MOS72 1225 F529 4F = "O" -- MOS72 1226 F52A 46 = "F" -- MOS72 1227 F52B 00 = &00 -- MOS72 1228 F52C -- MOS72 1229 F52C TTL C.F.S. Main Routines - PUTBYTE -- MOS72 1230 F52C OPT &01 -- MOS72 1231 F52C -- MOS72 1232 F52C -- MOS72 1233 F52C ;****************** -- MOS72 1234 F52C ;* P U T B Y T E * -- MOS72 1235 F52C ;****************** -- MOS72 1236 F52C -- MOS72 1237 F52C -- MOS72 1238 F52C [ MOS125 = &FF -- MOS72 1269 F52C | -- MOS72 1270 F52C PUTBYT -- MOS72 1271 F52C -- MOS72 1272 F52C ;Note, IADDR not used in this -- MOS72 1273 F52C ;function coz RX interrupts are "disabled" -- MOS72 1274 F52C ;by TXFLAG (see IRUPT) -- MOS72 1275 F52C MOS72 MOS72 MOS72 MOS72 Acorn macro assembler Page 132 MOS72 C.F.S. Main Routines - PUTBYTE MOS72 -- MOS72 1276 F52C 85 BC STA TEMP -- MOS72 1277 F52E 8A TXA -- MOS72 1278 F52F 48 PHA -- MOS72 1279 F530 98 TYA -- MOS72 1280 F531 48 PHA -- MOS72 1281 F532 A9 02 LDAIM OUTHND -- MOS72 1282 F534 20 93 FB JSR CHKHND ;Check handle open -- MOS72 1283 F537 -- MOS72 1284 F537 A5 BC LDA TEMP -- MOS72 1285 F539 AE 9D 03 LDX OUTPTR -- MOS72 1286 F53C 9D 00 09 STAAX OUTBFR -- MOS72 1287 F53F E8 INX -- MOS72 1288 F540 D0 06 BNE PBEXIT ;Test if last byte of buffer MOS72 1288 F540 v79 MOS72 1289 F542 20 96 F4 JSR WRTBFR ;Buffer full, write out. MOS72 1288 F540 v79 MOS72 1290 F545 20 E7 FA JSR CASMOF MOS72 1288 F540 v79 MOS72 1291 F548 MOS72 1288 F540 v79 MOS72 1292 F548 EE 9D 03 PBEXIT INC OUTPTR -- MOS72 1293 F54B -- MOS72 1294 F54B ;Increment pointer after writing block out so that -- MOS72 1295 F54B ;user can retry if block is interrupted -- MOS72 1296 F54B ;by ESCAPE. -- MOS72 1297 F54B -- MOS72 1298 F54B 4C 71 F4 JMP GBEXX ;restores A from TEMP -- MOS72 1299 F54E ;and now IADDR is not used at all. -- MOS72 1300 F54E ] -- MOS72 1301 F54E -- MOS72 1302 F54E -- MOS72 1303 F54E -- MOS72 1304 F54E -- MOS72 1305 F54E LNK MOS74 -- MOS74 0001 F54E -- MOS74 0002 F54E ;File - MOS74 -- MOS74 0003 F54E -- MOS74 0004 F54E TTL C.F.S Main Routines - OPT -- MOS74 0005 F54E OPT &01 -- MOS74 0006 F54E -- MOS74 0007 F54E [ MOS125 = &FF -- MOS74 0037 F54E | -- MOS74 0038 F54E HELP ;*HELP command -- MOS74 0039 F54E A2 09 LDXIM SVHELP -- MOS74 0040 F550 20 71 F1 JSR SVOP ;Y = offset within line of arguments -- MOS74 0041 F553 ; -- MOS74 0042 F553 ; Y preserved, therefore Y>=2 on return -- MOS74 0043 F553 ; -- MOS74 0044 F553 ;STROUT uses FTPTR, clobbered during OSASCI->OSBPUT -- MOS74 0045 F553 A9 0D LDAIM MCR ;start by printing CR -- MOS74 0046 F555 A8 TAY ;initialise offset -- MOS74 0047 F556 20 E3 FF HELOP JSR OSASCI MOS74 0050 F55D ^77 MOS74 0048 F559 C8 INY MOS74 0050 F55D ^77 MOS74 0049 F55A B9 A4 EA LDAAY PVER +&01 -MCR MOS74 0050 F55D ^77 MOS74 0050 F55D D0 F7 BNE HELOP -- MOS74 0051 F55F F0 30 BEQ HELOO MOS74 0051 F55F v4F MOS74 0052 F561 MOS74 0051 F55F v4F MOS74 0053 F561 RECORD MOS74 0051 F55F v4F MOS74 0054 F561 MOS74 0051 F55F v4F MOS74 0055 F561 AD 47 02 LDA SROMSW MOS74 0051 F55F v4F MOS74 0056 F564 D0 2E BNE OPTERR ;OK if not in SFS MOS74 0051 F55F v4F MOS74 0057 F566 20 85 FB JSR MOTONW ;Motor ON for OUTPUT MOS74 0051 F55F v4F MOS74 0058 F569 20 D5 FB JSR BUGFIX MOS74 0051 F55F v4F MOS74 0059 F56C 20 5B EA JSR MSGON MOS74 0051 F55F v4F MOS74 0060 F56F F0 45 BEQ RECEXX MOS74 0060 F56F v3A MOS74 0061 F571 MOS74 0060 F56F v3A MOS74 0062 F571 20 3B FA JSR MSGOUT ;If messages ON, prompt MOS74 0060 F56F v3A MOS74 0063 F574 52 45 43 = "RECORD then RETURN" MOS74 0060 F56F v3A MOS74 0064 F586 00 = &00 MOS74 0060 F56F v3A MOS74 0065 F587 MOS74 0060 F56F v3A MOS74 0066 F587 20 8B F9 GETCR1 JSR ESCAPE MOS74 0060 F56F v3A MOS74 0067 F58A 20 E0 FF JSR OSRDCH MOS74 0060 F56F v3A MOS74 0068 F58D C9 0D CMPIM MCR MOS74 0060 F56F v3A MOS74 0069 F58F D0 F6 BNE GETCR1 MOS74 0060 F56F v3A MOS74 0070 F591 4C E7 FF HELOO JMP OSNEWL MOS74 0060 F56F v3A MOS74 0071 F594 MOS74 0060 F56F v3A MOS74 0072 F594 MOS74 0060 F56F v3A MOS74 0073 F594 4C 89 E3 OPTERR JMP MBDCMD MOS74 0060 F56F v3A MOS74 0074 F597 MOS74 0060 F56F v3A MOS74 0075 F597 ;Entered with two args in X & Y decoded from MOS74 0060 F56F v3A MOS74 0076 F597 ;command line by MOS. MOS74 0060 F56F v3A MOS74 0077 F597 MOS74 0060 F56F v3A MOS74 0078 F597 E0 03 CFSOPT CPXIM &03 MOS74 0060 F56F v3A MOS74 0079 F599 F0 1C BEQ SETGAP MOS74 0060 F56F v3A MOS74 0080 F59B B0 F7 BCS OPTERR MOS74 0060 F56F v3A MOS74 0081 F59D A9 A1 LDAIM DEFLT MOS74 0060 F56F v3A MOS74 0082 F59F C0 03 CPYIM &03 MOS74 0060 F56F v3A MOS74 0083 F5A1 CA DEX MOS74 0060 F56F v3A MOS74 0084 F5A2 30 10 BMI SETFL1 MOS74 0060 F56F v3A MOS74 0085 F5A4 B0 EE BCS OPTERR MOS74 0060 F56F v3A MOS74 0086 F5A6 F0 05 BEQ MSGS MOS74 0060 F56F v3A MOS74 0087 F5A8 ERRS MOS74 0060 F56F v3A MOS74 0088 F5A8 C8 INY MOS74 0060 F56F v3A MOS74 0089 F5A9 C8 INY MOS74 0060 F56F v3A MOS74 0090 F5AA C8 INY MOS74 0060 F56F v3A MOS74 0091 F5AB 49 FF EORIM MSGMSK:EOR:ERRMSK ;Mask out error and default bits MOS74 0060 F56F v3A MOS74 0092 F5AD 49 92 MSGS EORIM DEFLT:EOR:MSGMSK MOS74 0060 F56F v3A MOS74 0093 F5AF XSETFLG MOS74 0060 F56F v3A MOS74 0094 F5AF 25 E3 AND OPTS MOS74 0060 F56F v3A MOS74 0095 F5B1 19 B9 F6 ORAAY OPTTAB MOS74 0060 F56F v3A MOS74 0096 F5B4 SETFL1 MOS74 0060 F56F v3A MOS74 0097 F5B4 85 E3 STA OPTS MOS74 0060 F56F v3A MOS74 0098 F5B6 RECEXX MOS74 0060 F56F v3A MOS74 0099 F5B6 60 RTS MOS74 0079 F599 v63 MOS74 0100 F5B7 ] MOS74 0079 F599 v63 MOS74 0101 F5B7 MOS74 0079 F599 v63 MOS74 0102 F5B7 98 SETGAP TYA -- MOS74 0103 F5B8 30 02 BMI SETGP2 ; >127 => default MOS74 0103 F5B8 v7D MOS74 0104 F5BA D0 02 BNE SETGP1 ; 0 < gap < 128 => OK MOS74 0103 F5B8 v7D MOS74 0105 F5BC A9 19 SETGP2 LDAIM DEFGAP MOS74 0104 F5BA v7D MOS74 0106 F5BE 8D D1 03 SETGP1 STA SEQGAP -- MOS74 0107 F5C1 60 RTS -- MOS74 0108 F5C2 -- MOS74 0109 F5C2 [ MOS125 = &FF -- MOS74 0120 F5C2 ] -- MOS74 0121 F5C2 -- MOS74 0122 F5C2 TTL Main Routines - Interrupt routine -- MOS74 0123 F5C2 OPT &01 -- MOS74 0124 F5C2 -- MOS74 0125 F5C2 IRUPT -- MOS74 0126 F5C2 -- MOS74 0127 F5C2 C6 C0 DEC IFLAG -- MOS74 0128 F5C4 AD 47 02 LDA SROMSW ;Is SFS active ? -- MOS74 0129 F5C7 F0 06 BEQ NOTSPK ;Nope MOS74 0129 F5C7 v79 MOS74 0130 F5C9 ;GoMMC tape patch has F58D NOP;NOP MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 133 MOS74 Main Routines - Interrupt routine MOS74 MOS74 0129 F5C7 v79 MOS74 0131 F5C9 MOS74 0129 F5C7 v79 MOS74 0132 F5C9 20 8D EE JSR RDSPCH ;Yes, get next byte from ROM MOS74 0129 F5C7 v79 MOS74 0133 F5CC [ MOS125 = &FF MOS74 0129 F5C7 v79 MOS74 0135 F5CC ] MOS74 0129 F5C7 v79 MOS74 0136 F5CC 18 CLC ;Clear carry => no DCD MOS74 0129 F5C7 v79 MOS74 0137 F5CD 90 1A BCC DOIRPT ;Do as per cassette irupt MOS74 0137 F5CD v65 MOS74 0138 F5CF MOS74 0137 F5CD v65 MOS74 0139 F5CF AD 08 FE NOTSPK LDA STATUS MOS74 0137 F5CD v65 MOS74 0140 F5D2 48 PHA MOS74 0137 F5CD v65 MOS74 0141 F5D3 29 02 ANDIM TXBIT MOS74 0137 F5CD v65 MOS74 0142 F5D5 F0 0B BEQ ITXON ;No TX interrupt MOS74 0137 F5CD v65 MOS74 0143 F5D7 A4 CA LDY TXFLAG MOS74 0137 F5CD v65 MOS74 0144 F5D9 F0 07 BEQ ITXON ;0 => receiving MOS74 0137 F5CD v65 MOS74 0145 F5DB MOS74 0137 F5CD v65 MOS74 0146 F5DB ;Here, transmiting byte .... MOS74 0137 F5CD v65 MOS74 0147 F5DB MOS74 0137 F5CD v65 MOS74 0148 F5DB 68 PLA ;Restore stack MOS74 0137 F5CD v65 MOS74 0149 F5DC A5 BD LDA IBUF MOS74 0137 F5CD v65 MOS74 0150 F5DE 8D 09 FE STA PORT MOS74 0137 F5CD v65 MOS74 0151 F5E1 60 RTS MOS74 0137 F5CD v65 MOS74 0152 F5E2 MOS74 0137 F5CD v65 MOS74 0153 F5E2 MOS74 0137 F5CD v65 MOS74 0154 F5E2 ITXON MOS74 0137 F5CD v65 MOS74 0155 F5E2 MOS74 0137 F5CD v65 MOS74 0156 F5E2 ;If receiving byte, check IFLAG to see MOS74 0137 F5CD v65 MOS74 0157 F5E2 ;where to put it. MOS74 0137 F5CD v65 MOS74 0158 F5E2 MOS74 0137 F5CD v65 MOS74 0159 F5E2 AC 09 FE LDY PORT ;Cancel interrupt MOS74 0137 F5CD v65 MOS74 0160 F5E5 68 PLA ;Pull status MOS74 0137 F5CD v65 MOS74 0161 F5E6 4A LSRA MOS74 0137 F5CD v65 MOS74 0162 F5E7 4A LSRA MOS74 0137 F5CD v65 MOS74 0163 F5E8 4A LSRA ;C = 1 => DCD; C = 0 => no DCD MOS74 0137 F5CD v65 MOS74 0164 F5E9 A6 C2 DOIRPT LDX ITYPE -- MOS74 0165 F5EB F0 65 BEQ IEX ;0 => no task pending MOS74 0165 F5EB v1A MOS74 0166 F5ED MOS74 0165 F5EB v1A MOS74 0167 F5ED MOS74 0165 F5EB v1A MOS74 0168 F5ED CA DEX MOS74 0165 F5EB v1A MOS74 0169 F5EE D0 06 BNE FNDHDR ;X <> 1 => not DCD task MOS74 0165 F5EB v1A MOS74 0170 F5F0 90 60 BCC IEX ;=> DCD Not yet found MOS74 0165 F5EB v1A MOS74 0171 F5F2 A0 02 LDYIM &02 MOS74 0165 F5EB v1A MOS74 0172 F5F4 D0 5A BNE NEWINT ;Go on to look find hdr. MOS74 0165 F5EB v1A MOS74 0173 F5F6 MOS74 0165 F5EB v1A MOS74 0174 F5F6 CA FNDHDR DEX MOS74 0165 F5EB v1A MOS74 0175 F5F7 D0 13 BNE RDCHAR ;X <> 2 => not header task MOS74 0165 F5EB v1A MOS74 0176 F5F9 B0 57 BCS IEX ;Ignore DCD if present MOS74 0165 F5EB v1A MOS74 0177 F5FB 98 TYA ;Get stuff from port MOS74 0165 F5EB v1A MOS74 0178 F5FC 20 6D FB JSR SETJOB ;Set CHKSUM etc. MOS74 0165 F5EB v1A MOS74 0179 F5FF A0 03 LDYIM &03 ;New task MOS74 0165 F5EB v1A MOS74 0180 F601 MOS74 0165 F5EB v1A MOS74 0181 F601 [ GLYN=0 MOS74 0165 F5EB v1A MOS74 0185 F601 ] MOS74 0165 F5EB v1A MOS74 0186 F601 MOS74 0165 F5EB v1A MOS74 0187 F601 C9 2A CMPIM "*" MOS74 0165 F5EB v1A MOS74 0188 F603 F0 4B BEQ NEWINT ;Set read chars MOS74 0165 F5EB v1A MOS74 0189 F605 20 45 FB JSR RXINIT ;Reset ULA (should be BLIP) MOS74 0165 F5EB v1A MOS74 0190 F608 A0 01 LDYIM &01 MOS74 0165 F5EB v1A MOS74 0191 F60A D0 44 BNE NEWINT ;Otherwise, wait for DCD MOS74 0165 F5EB v1A MOS74 0192 F60C MOS74 0165 F5EB v1A MOS74 0193 F60C CA RDCHAR DEX MOS74 0165 F5EB v1A MOS74 0194 F60D D0 0A BNE RDBLK ;X <> 3 => not RDCHAR task MOS74 0165 F5EB v1A MOS74 0195 F60F B0 03 BCS GOTDCD ;DCD found, not char MOS74 0165 F5EB v1A MOS74 0196 F611 84 BD STY IBUF ;Store char read MOS74 0165 F5EB v1A MOS74 0197 F613 [ MOS125 = &FF MOS74 0165 F5EB v1A MOS74 0199 F613 | MOS74 0165 F5EB v1A MOS74 0200 F613 60 RTS MOS74 0165 F5EB v1A MOS74 0201 F614 ] MOS74 0165 F5EB v1A MOS74 0202 F614 A9 80 GOTDCD LDAIM &80 MOS74 0165 F5EB v1A MOS74 0203 F616 85 C0 STA IFLAG ;Indicate DCD MOS74 0165 F5EB v1A MOS74 0204 F618 [ MOS125 = &FF MOS74 0165 F5EB v1A MOS74 0206 F618 | MOS74 0165 F5EB v1A MOS74 0207 F618 60 RTS MOS74 0165 F5EB v1A MOS74 0208 F619 ] MOS74 0165 F5EB v1A MOS74 0209 F619 MOS74 0165 F5EB v1A MOS74 0210 F619 CA RDBLK DEX ;X <> 4=> not RDBLK MOS74 0165 F5EB v1A MOS74 0211 F61A D0 27 BNE SUMIN MOS74 0165 F5EB v1A MOS74 0212 F61C B0 2D BCS IFIN ;If DCD, finish immediately MOS74 0165 F5EB v1A MOS74 0213 F61E 98 TYA MOS74 0165 F5EB v1A MOS74 0214 F61F 20 E6 F7 JSR ADDCRC MOS74 0165 F5EB v1A MOS74 0215 F622 A4 BC LDY TEMP ;(pointer) MOS74 0165 F5EB v1A MOS74 0216 F624 E6 BC INC TEMP MOS74 0165 F5EB v1A MOS74 0217 F626 24 BD BIT IBUF MOS74 0165 F5EB v1A MOS74 0218 F628 30 0D BMI RDBLKA ;=> just verify, don't store MOS74 0165 F5EB v1A MOS74 0219 F62A MOS74 0165 F5EB v1A MOS74 0220 F62A [ TUBESW=0 MOS74 0165 F5EB v1A MOS74 0221 F62A 20 C6 FB JSR TUBCHK ;Check tube present and top bytes of address MOS74 0165 F5EB v1A MOS74 0222 F62D F0 05 BEQ RDBLKB ;No need to tube. (NOTE TUBCHK DOES TAX to preserve A) MOS74 0165 F5EB v1A MOS74 0223 F62F MOS74 0165 F5EB v1A MOS74 0224 F62F 8E E5 FE STX TREG3 ;Otherwise, push to tube R3 MOS74 0165 F5EB v1A MOS74 0225 F632 D0 03 BNE RDBLKA ;And continue MOS74 0165 F5EB v1A MOS74 0226 F634 MOS74 0165 F5EB v1A MOS74 0227 F634 8A RDBLKB TXA MOS74 0165 F5EB v1A MOS74 0228 F635 91 B0 STAIY BKADDR ;Store in IO proc. MOS74 0165 F5EB v1A MOS74 0229 F637 | MOS74 0165 F5EB v1A MOS74 0231 F637 ] MOS74 0165 F5EB v1A MOS74 0232 F637 MOS74 0165 F5EB v1A MOS74 0233 F637 C8 RDBLKA INY MOS74 0165 F5EB v1A MOS74 0234 F638 CC C8 03 CPY INFO +BKSZEL ;** 1 BYTE SIZE ONLY ** MOS74 0165 F5EB v1A MOS74 0235 F63B D0 15 BNE IEX ;Keep going MOS74 0165 F5EB v1A MOS74 0236 F63D MOS74 0165 F5EB v1A MOS74 0237 F63D ;Have here finished reading data, so MOS74 0165 F5EB v1A MOS74 0238 F63D ;read two more bytes of CRC without storing MOS74 0165 F5EB v1A MOS74 0239 F63D MOS74 0165 F5EB v1A MOS74 0240 F63D [ MOS125 = &FF MOS74 0165 F5EB v1A MOS74 0244 F63D | MOS74 0165 F5EB v1A MOS74 0245 F63D A0 05 LDYIM &05 ;NB bit 1 <> bit 0 MOS74 0165 F5EB v1A MOS74 0246 F63F 84 BC STY TEMP ;Set counter MOS74 0165 F5EB v1A MOS74 0247 F641 ] MOS74 0165 F5EB v1A MOS74 0248 F641 D0 0D BNE NEWINT MOS74 0165 F5EB v1A MOS74 0249 F643 MOS74 0165 F5EB v1A MOS74 0250 F643 MOS74 0165 F5EB v1A MOS74 0251 F643 SUMIN MOS74 0165 F5EB v1A MOS74 0252 F643 MOS74 0165 F5EB v1A MOS74 0253 F643 ;Here, assumed X = 5 MOS74 0165 F5EB v1A MOS74 0254 F643 MOS74 0165 F5EB v1A MOS74 0255 F643 98 TYA MOS74 0165 F5EB v1A MOS74 0256 F644 20 E6 F7 JSR ADDCRC MOS74 0165 F5EB v1A MOS74 0257 F647 [ MOS125 = &FF MOS74 0165 F5EB v1A MOS74 0260 F647 | MOS74 0165 F5EB v1A MOS74 0261 F647 46 BC LSR TEMP ;NB alters returned C MOS74 0165 F5EB v1A MOS74 0262 F649 B0 07 BCS IEX ;One more to go MOS74 0165 F5EB v1A MOS74 0263 F64B ] MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 134 MOS74 Main Routines - Interrupt routine MOS74 MOS74 0165 F5EB v1A MOS74 0264 F64B MOS74 0165 F5EB v1A MOS74 0265 F64B ;If here, finished, so mark BG job finished MOS74 0165 F5EB v1A MOS74 0266 F64B MOS74 0165 F5EB v1A MOS74 0267 F64B 20 3B FB IFIN JSR CRESET MOS74 0165 F5EB v1A MOS74 0268 F64E A0 00 LDYIM &00 MOS74 0165 F5EB v1A MOS74 0269 F650 84 C2 NEWINT STY ITYPE MOS74 0165 F5EB v1A MOS74 0270 F652 60 IEX RTS -- MOS74 0271 F653 -- MOS74 0272 F653 TTL C.F.S. Main routines - EOF -- MOS74 0273 F653 OPT MOS74 MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 135 MOS74 C.F.S. Main routines - EOF MOS74 -- MOS74 0274 F653 -- MOS74 0275 F653 48 CFSEOF PHA ;First store Y and A -- MOS74 0276 F654 98 TYA -- MOS74 0277 F655 48 PHA -- MOS74 0278 F656 8A TXA ;Transfer handle to Y -- MOS74 0279 F657 A8 TAY ;for checking. -- MOS74 0280 F658 A9 03 LDAIM HNDS ;Both handles -- MOS74 0281 F65A 20 93 FB JSR CHKHND ;NOTE - CORRUPTS Y -- MOS74 0282 F65D -- MOS74 0283 F65D A5 E2 LDA CFSTAT -- MOS74 0284 F65F 29 40 ANDIM LSTBYT -- MOS74 0285 F661 AA TAX ;Result (zero or non-zero) in X -- MOS74 0286 F662 68 PLA -- MOS74 0287 F663 A8 TAY -- MOS74 0288 F664 68 PLA ;Restore A and Y -- MOS74 0289 F665 60 RTS -- MOS74 0290 F666 -- MOS74 0291 F666 TTL C.F.S. UTILITIES - MOS74 -- MOS74 0292 F666 OPT &01 -- MOS74 0293 F666 -- MOS74 0294 F666 ;****** CASSETTE UTILITIES ****** -- MOS74 0295 F666 -- MOS74 0296 F666 -- MOS74 0297 F666 A9 00 SRCH0 LDAIM &00 -- MOS74 0298 F668 85 B4 STA BLOKNO -- MOS74 0299 F66A 85 B5 STA BLOKNO +&01 -- MOS74 0300 F66C -- MOS74 0301 F66C SEARCH -- MOS74 0302 F66C -- MOS74 0303 F66C -- MOS74 0304 F66C ;File title pointed to by FTPTR. -- MOS74 0305 F66C ;Block number in BLOKNO. -- MOS74 0306 F66C -- MOS74 0307 F66C ;Tool through tape until found. If messages -- MOS74 0308 F66C ;on, print header info and checksum messages. -- MOS74 0309 F66C -- MOS74 0310 F66C A5 B4 LDA BLOKNO -- MOS74 0311 F66E 48 PHA -- MOS74 0312 F66F 85 B6 STA SRCHBK -- MOS74 0313 F671 A5 B5 LDA BLOKNO +&01 -- MOS74 0314 F673 48 PHA -- MOS74 0315 F674 85 B7 STA SRCHBK +&01 ;Set block to search for -- MOS74 0316 F676 20 3B FA JSR MSGOUT -- MOS74 0317 F679 53 65 61 = "Searching",MCR,&00 -- MOS74 0318 F684 A9 FF LDAIM &FF ;=> search and validate -- MOS74 0319 F686 20 4D F3 JSR LOOK -- MOS74 0320 F689 68 PLA -- MOS74 0321 F68A 85 B5 STA BLOKNO +&01 -- MOS74 0322 F68C 68 PLA -- MOS74 0323 F68D 85 B4 STA BLOKNO -- MOS74 0324 F68F A5 B6 LDA SRCHBK -- MOS74 0325 F691 05 B7 ORA SRCHBK+&01 -- MOS74 0326 F693 D0 0D BNE SRCHXX MOS74 0326 F693 v72 MOS74 0327 F695 MOS74 0326 F693 v72 MOS74 0328 F695 ;If finding first block, set next expected MOS74 0326 F693 v72 MOS74 0329 F695 ;block to zero so that a load will not MOS74 0326 F693 v72 MOS74 0330 F695 ;fail because of a new file breaking into MOS74 0326 F693 v72 MOS74 0331 F695 ;a previous one thus causing non-sequential MOS74 0326 F693 v72 MOS74 0332 F695 ;blocks and therefore a block? error. MOS74 0326 F693 v72 MOS74 0333 F695 MOS74 0326 F693 v72 MOS74 0334 F695 85 B4 STA BLOKNO ;If first block, no block error MOS74 0326 F693 v72 MOS74 0335 F697 85 B5 STA BLOKNO +&01 MOS74 0326 F693 v72 MOS74 0336 F699 MOS74 0326 F693 v72 MOS74 0337 F699 ;Check header CRC so that we only latch MOS74 0326 F693 v72 MOS74 0338 F699 ;onto non-corrupt file names MOS74 0326 F693 v72 MOS74 0339 F699 MOS74 0326 F693 v72 MOS74 0340 F699 A5 C1 LDA HDRCRC MOS74 0326 F693 v72 MOS74 0341 F69B D0 05 BNE SRCHXX MOS74 0326 F693 v72 MOS74 0342 F69D A2 B1 LDXIM INFO -&01 ;Make sure looking for MOS74 0326 F693 v72 MOS74 0343 F69F 20 78 FB JSR MOVFN ;file name found in subsequent blocks MOS74 0326 F693 v72 MOS74 0344 F6A2 SRCHXX ;Check if run off the end of SROM system MOS74 0326 F693 v72 MOS74 0345 F6A2 MOS74 0326 F693 v72 MOS74 0346 F6A2 AD 47 02 LDA SROMSW -- MOS74 0347 F6A5 F0 18 BEQ SRCHYY ;In CFS, carry on MOS74 0347 F6A5 v67 MOS74 0348 F6A7 70 16 BVS SRCHYY ;Not end of ROM => continue MOS74 0347 F6A5 v67 MOS74 0349 F6A9 FNF MOS74 0347 F6A5 v67 MOS74 0350 F6A9 00 BRK MOS74 0398 F6E0 ^47 MOS74 0351 F6AA D6 = SFSER1 MOS74 0398 F6E0 ^47 MOS74 0352 F6AB [ MOS125 = &FF MOS74 0398 F6E0 ^47 MOS74 0354 F6AB | MOS74 0398 F6E0 ^47 MOS74 0355 F6AB 46 69 6C = "File not found" MOS74 0398 F6E0 ^47 MOS74 0356 F6B9 OPTTAB MOS74 0398 F6E0 ^47 MOS74 0357 F6B9 00 = &00 ;Messages off MOS74 0398 F6E0 ^47 MOS74 0358 F6BA 88 = MSGS1 ;Short messages MOS74 0398 F6E0 ^47 MOS74 0359 F6BB CC = MSGS2 ;Long messages MOS74 0398 F6E0 ^47 MOS74 0360 F6BC 00 = IGBIT MOS74 0398 F6E0 ^47 MOS74 0361 F6BD 22 = RETBIT MOS74 0398 F6E0 ^47 MOS74 0362 F6BE 11 = ABTBIT MOS74 0398 F6E0 ^47 MOS74 0363 F6BF ] MOS74 0398 F6E0 ^47 MOS74 0364 F6BF MOS74 0398 F6E0 ^47 MOS74 0365 F6BF A0 FF SRCHYY LDYIM &FF ;For LOAD and RDBFER MOS74 0398 F6E0 ^47 MOS74 0366 F6C1 8C DF 03 STY OLDFLG ;Fool PRTHDR to print MOS74 0398 F6E0 ^47 MOS74 0367 F6C4 ;extra blank line after "Loading" message MOS74 0398 F6E0 ^47 MOS74 0368 F6C4 60 RTS MOS74 0398 F6E0 ^47 MOS74 0369 F6C5 MOS74 0398 F6E0 ^47 MOS74 0370 F6C5 MOS74 0398 F6E0 ^47 MOS74 0371 F6C5 ECLOSE ;close EXEC file MOS74 0398 F6E0 ^47 MOS74 0372 F6C5 MOS74 0398 F6E0 ^47 MOS74 0373 F6C5 A9 00 LDAIM ZERO MOS74 0398 F6E0 ^47 MOS74 0374 F6C7 ; MOS74 0398 F6E0 ^47 MOS74 0375 F6C7 EXEC ; EXEC MOS74 0398 F6E0 ^47 MOS74 0376 F6C7 MOS74 0398 F6E0 ^47 MOS74 0377 F6C7 ; XY -> filename MOS74 0398 F6E0 ^47 MOS74 0378 F6C7 ; A = $00 MOS74 0398 F6E0 ^47 MOS74 0379 F6C7 ; MOS74 0398 F6E0 ^47 MOS74 0380 F6C7 ; does not corrupt Y if just closing file (used by SHUTES) MOS74 0398 F6E0 ^47 MOS74 0381 F6C7 ; MOS74 0398 F6E0 ^47 MOS74 0382 F6C7 08 PHP ;remember whether to just close exec file MOS74 0398 F6E0 ^47 MOS74 0383 F6C8 84 E6 STY EXECY ;save Y MOS74 0398 F6E0 ^47 MOS74 0384 F6CA ; close any previous exec file MOS74 0398 F6E0 ^47 MOS74 0385 F6CA AC 56 02 LDY EXECH MOS74 0398 F6E0 ^47 MOS74 0386 F6CD 8D 56 02 STA EXECH ;clear execing MOS74 0398 F6E0 ^47 MOS74 0387 F6D0 F0 03 BEQ EXEC2 ;[no current exec file, avoid closing all files] MOS74 0398 F6E0 ^47 MOS74 0388 F6D2 ; A=0 MOS74 0398 F6E0 ^47 MOS74 0389 F6D2 20 CE FF JSR OSFIND ;close previous exec file (assumes X not corrupted) MOS74 0398 F6E0 ^47 MOS74 0390 F6D5 EXEC2 MOS74 0398 F6E0 ^47 MOS74 0391 F6D5 A4 E6 LDY EXECY ;restore Y MOS74 0398 F6E0 ^47 MOS74 0392 F6D7 28 PLP MOS74 0398 F6E0 ^47 MOS74 0393 F6D8 F0 0B BEQ EXEC0 ;[just stop execing] MOS74 0398 F6E0 ^47 MOS74 0394 F6DA ; try opening specified file MOS74 0398 F6E0 ^47 MOS74 0395 F6DA A9 40 LDAIM &40 ;open file for input MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 136 MOS74 C.F.S. UTILITIES - MOS74 MOS74 MOS74 0398 F6E0 ^47 MOS74 0396 F6DC 20 CE FF JSR OSFIND MOS74 0398 F6E0 ^47 MOS74 0397 F6DF A8 TAY MOS74 0398 F6E0 ^47 MOS74 0398 F6E0 F0 C7 BEQ FNF ;[file not found] MOS74 0393 F6D8 v74 MOS74 0399 F6E2 8D 56 02 STA EXECH ;remember exec file handle MOS74 0393 F6D8 v74 MOS74 0400 F6E5 EXEC0 ;Z=1 MOS74 0393 F6D8 v74 MOS74 0401 F6E5 60 RTS -- MOS74 0402 F6E6 -- MOS74 0403 F6E6 -- MOS74 0404 F6E6 RDBFER -- MOS74 0405 F6E6 -- MOS74 0406 F6E6 -- MOS74 0407 F6E6 ;Read a block into input buffer. Used in GETBYTE -- MOS74 0408 F6E6 -- MOS74 0409 F6E6 A2 A6 LDXIM INFILE -&01 -- MOS74 0410 F6E8 20 78 FB JSR MOVFN ;Set file searching for -- MOS74 0411 F6EB 20 B1 F7 JSR RDHEAD -- MOS74 0412 F6EE -- MOS74 0413 F6EE RDBFRS -- MOS74 0414 F6EE -- MOS74 0415 F6EE AD CA 03 LDA INFO +BKFLAG ;Check protection bit MOS74 0469 F73F ^2D MOS74 0416 F6F1 4A LSRA MOS74 0469 F73F ^2D MOS74 0417 F6F2 90 03 BCC RDBFLL ;Not protected -> continue MOS74 0469 F73F ^2D MOS74 0418 F6F4 4C 8F F2 JMP PROTER ;Protected -> error MOS74 0469 F73F ^2D MOS74 0419 F6F7 MOS74 0469 F73F ^2D MOS74 0420 F6F7 AD DD 03 RDBFLL LDA NEXTIN MOS74 0469 F73F ^2D MOS74 0421 F6FA 85 B4 STA BLOKNO MOS74 0469 F73F ^2D MOS74 0422 F6FC AD DE 03 LDA NEXTIN +&01 MOS74 0469 F73F ^2D MOS74 0423 F6FF 85 B5 STA BLOKNO +&01 ;Set block no. to check MOS74 0469 F73F ^2D MOS74 0424 F701 MOS74 0469 F73F ^2D MOS74 0425 F701 A9 00 LDAIM INBUFR MOS74 0469 F73F ^2D MOS74 0426 F703 85 B0 STA BKADDR MOS74 0469 F73F ^2D MOS74 0427 F705 A9 0A LDAIM /(INBUFR ) MOS74 0469 F73F ^2D MOS74 0428 F707 85 B1 STA BKADDR +&01 MOS74 0469 F73F ^2D MOS74 0429 F709 A9 FF LDAIM &FF MOS74 0469 F73F ^2D MOS74 0430 F70B 85 B2 STA BKADDR +&02 MOS74 0469 F73F ^2D MOS74 0431 F70D 85 B3 STA BKADDR +&03 ;Input buffer is in IO proc. MOS74 0469 F73F ^2D MOS74 0432 F70F 20 05 F8 JSR READBK ;Read data into buffer MOS74 0469 F73F ^2D MOS74 0433 F712 20 AA F9 JSR LODHDR MOS74 0469 F73F ^2D MOS74 0434 F715 D0 25 BNE RDBERR MOS74 0469 F73F ^2D MOS74 0435 F717 MOS74 0469 F73F ^2D MOS74 0436 F717 ;Data read ok, inc. next expected block. MOS74 0469 F73F ^2D MOS74 0437 F717 MOS74 0469 F73F ^2D MOS74 0438 F717 AD FF 0A LDA INBUFR +&FF MOS74 0469 F73F ^2D MOS74 0439 F71A 8D ED 02 STA FINBYT ;Store final byte of this buffer in safe place MOS74 0469 F73F ^2D MOS74 0440 F71D MOS74 0469 F73F ^2D MOS74 0441 F71D 20 5E FB JSR NXTBLK ;Next block = current block + 1 MOS74 0469 F73F ^2D MOS74 0442 F720 ;NOTE - corrupts BLOKNO MOS74 0469 F73F ^2D MOS74 0443 F720 MOS74 0469 F73F ^2D MOS74 0444 F720 8E DD 03 STX NEXTIN MOS74 0469 F73F ^2D MOS74 0445 F723 8C DE 03 STY NEXTIN +&01 MOS74 0469 F73F ^2D MOS74 0446 F726 MOS74 0469 F73F ^2D MOS74 0447 F726 A2 02 LDXIM &02 MOS74 0469 F73F ^2D MOS74 0448 F728 MOS74 0469 F73F ^2D MOS74 0449 F728 ;Set block size and flag byte MOS74 0469 F73F ^2D MOS74 0450 F728 MOS74 0469 F73F ^2D MOS74 0451 F728 BD C8 03 RDBFL1 LDAAX INFO +BKSZEL MOS74 0469 F73F ^2D MOS74 0452 F72B 9D EA 02 STAAX INBSZE MOS74 0469 F73F ^2D MOS74 0453 F72E CA DEX MOS74 0469 F73F ^2D MOS74 0454 F72F 10 F7 BPL RDBFL1 MOS74 0469 F73F ^2D MOS74 0455 F731 2C EC 02 BIT BUFFLG MOS74 0469 F73F ^2D MOS74 0456 F734 10 03 BPL RDBFL8 MOS74 0469 F73F ^2D MOS74 0457 F736 20 E5 F2 JSR NOOLN1 ;If last block, new line MOS74 0469 F73F ^2D MOS74 0458 F739 MOS74 0469 F73F ^2D MOS74 0459 F739 4C E7 FA RDBFL8 JMP CASMOF ;Motor off, exit MOS74 0469 F73F ^2D MOS74 0460 F73C MOS74 0469 F73F ^2D MOS74 0461 F73C ;From here down, dealing with errors MOS74 0469 F73F ^2D MOS74 0462 F73C MOS74 0469 F73F ^2D MOS74 0463 F73C RDBERR MOS74 0469 F73F ^2D MOS74 0464 F73C MOS74 0469 F73F ^2D MOS74 0465 F73C ;Retry - search for block number, and MOS74 0469 F73F ^2D MOS74 0466 F73C ;then go back to RDBFRS. MOS74 0469 F73F ^2D MOS74 0467 F73C MOS74 0469 F73F ^2D MOS74 0468 F73C 20 6C F6 JSR SEARCH ;FTPTR already set by RDHEAD. MOS74 0469 F73F ^2D MOS74 0469 F73F D0 AD BNE RDBFRS ;Restart (always jump back) -- MOS74 0470 F741 -- MOS74 0471 F741 -- MOS74 0472 F741 -- MOS74 0473 F741 -- MOS74 0474 F741 -- MOS74 0475 F741 C9 2A RDHDLC CMPIM "*" MOS74 0575 F7BB ^04 MOS74 0476 F743 F0 35 BEQ RDHDLA ;Char OK, go on to rest of block MOS74 0575 F7BB ^04 MOS74 0477 F745 C9 23 CMPIM "#" ;Is this a short header ?? MOS74 0575 F7BB ^04 MOS74 0478 F747 D0 0D BNE ROMER ;No -> illegal char -> error MOS74 0575 F7BB ^04 MOS74 0479 F749 EE C6 03 INC INFO +BKNOLO ;Have "read" short block header, so MOS74 0575 F7BB ^04 MOS74 0480 F74C D0 03 BNE RDHDX2 ;increment block number as if we have read whole header MOS74 0575 F7BB ^04 MOS74 0481 F74E EE C7 03 INC INFO +BKNOHI MOS74 0575 F7BB ^04 MOS74 0482 F751 [ MOS125 = &FF MOS74 0575 F7BB ^04 MOS74 0485 F751 | MOS74 0575 F7BB ^04 MOS74 0486 F751 69 7F RDHDX2 ADCIM &7F ;C=1, A=&23; set V:=1 => not end of SFS, A:=&A3 MOS74 0575 F7BB ^04 MOS74 0487 F753 AA TAX ;Prepare for non-DCD exit (X:=&A3, HW=4; was X:=&FF) MOS74 0575 F7BB ^04 MOS74 0488 F754 ] MOS74 0575 F7BB ^04 MOS74 0489 F754 D0 53 BNE RDHDX1 ;Assumed always +ve MOS74 0575 F7BB ^04 MOS74 0490 F756 MOS74 0575 F7BB ^04 MOS74 0491 F756 A9 F7 ROMER LDAIM NCTBIT MOS74 0575 F7BB ^04 MOS74 0492 F758 MOS74 0575 F7BB ^04 MOS74 0493 F758 ;Switch CAT bit off so messages not in a funny MOS74 0575 F7BB ^04 MOS74 0494 F758 ;state if error occurs in *CAT MOS74 0575 F7BB ^04 MOS74 0495 F758 MOS74 0575 F7BB ^04 MOS74 0496 F758 20 42 F3 JSR ANDSTA MOS74 0575 F7BB ^04 MOS74 0497 F75B 00 BRK MOS74 0575 F7BB ^04 MOS74 0498 F75C D7 = SFSERR MOS74 0575 F7BB ^04 MOS74 0499 F75D 42 61 64 = "Bad ROM" MOS74 0575 F7BB ^04 MOS74 0500 F764 00 = &00 MOS74 0575 F7BB ^04 MOS74 0501 F765 MOS74 0575 F7BB ^04 MOS74 0502 F765 RDHDL2 MOS74 0575 F7BB ^04 MOS74 0503 F765 MOS74 0575 F7BB ^04 MOS74 0504 F765 ;Here, set motor on and 6850 init etc. MOS74 0575 F7BB ^04 MOS74 0505 F765 MOS74 0575 F7BB ^04 MOS74 0506 F765 A0 FF LDYIM READFX ;Indicate read MOS74 0575 F7BB ^04 MOS74 0507 F767 20 87 FB JSR MOTON ;Motor ON and drive select MOS74 0575 F7BB ^04 MOS74 0508 F76A A9 01 LDAIM &01 MOS74 0575 F7BB ^04 MOS74 0509 F76C 85 C2 STA ITYPE MOS74 0575 F7BB ^04 MOS74 0510 F76E 20 45 FB JSR RXINIT ;Init 6850 and blip motor MOS74 0575 F7BB ^04 MOS74 0511 F771 MOS74 0575 F7BB ^04 MOS74 0512 F771 ;Wait for DCD and '* character indicating MOS74 0575 F7BB ^04 MOS74 0513 F771 ;start of block. MOS74 0575 F7BB ^04 MOS74 0514 F771 MOS74 0575 F7BB ^04 MOS74 0515 F771 20 8B F9 GETHLP JSR ESCAPE MOS74 0575 F7BB ^04 MOS74 0516 F774 A9 03 LDAIM &03 MOS74 0575 F7BB ^04 MOS74 0517 F776 C5 C2 CMP ITYPE MOS74 0575 F7BB ^04 MOS74 0518 F778 D0 F7 BNE GETHLP MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 137 MOS74 C.F.S. UTILITIES - MOS74 MOS74 MOS74 0575 F7BB ^04 MOS74 0519 F77A MOS74 0575 F7BB ^04 MOS74 0520 F77A [ MOS125 = &FF MOS74 0575 F7BB ^04 MOS74 0522 F77A | MOS74 0575 F7BB ^04 MOS74 0523 F77A RDHDLA MOS74 0575 F7BB ^04 MOS74 0524 F77A ] MOS74 0575 F7BB ^04 MOS74 0525 F77A 20 71 FB JSR SETJB1 ;Set cheksum etc. MOS74 0575 F7BB ^04 MOS74 0526 F77D MOS74 0575 F7BB ^04 MOS74 0527 F77D 20 CD F7 RDHDL1 JSR CASIN ;Read and add to checksum MOS74 0575 F7BB ^04 MOS74 0528 F780 50 1A BVC RDHDEX ;Header interrupted by DCD MOS74 0575 F7BB ^04 MOS74 0529 F782 99 B2 03 STAAY INFO ;Store in INFO MOS74 0575 F7BB ^04 MOS74 0530 F785 F0 06 BEQ RDHDL3 ;End of file title (Z set in CASIN) MOS74 0575 F7BB ^04 MOS74 0531 F787 C8 INY MOS74 0575 F7BB ^04 MOS74 0532 F788 C0 0B CPYIM FTSIZE ;Attempting to read over f.t. end MOS74 0575 F7BB ^04 MOS74 0533 F78A D0 F1 BNE RDHDL1 ;No, => continue MOS74 0575 F7BB ^04 MOS74 0534 F78C 88 DEY MOS74 0575 F7BB ^04 MOS74 0535 F78D MOS74 0575 F7BB ^04 MOS74 0536 F78D A2 0C RDHDL3 LDXIM BKINFO ;Now read all info. MOS74 0575 F7BB ^04 MOS74 0537 F78F 20 CD F7 RDHDL4 JSR CASIN MOS74 0575 F7BB ^04 MOS74 0538 F792 50 08 BVC RDHDEX ;Header interrupted by DCD MOS74 0575 F7BB ^04 MOS74 0539 F794 9D B2 03 STAAX INFO MOS74 0575 F7BB ^04 MOS74 0540 F797 E8 INX MOS74 0575 F7BB ^04 MOS74 0541 F798 E0 1F CPXIM BKLAST +&02 MOS74 0575 F7BB ^04 MOS74 0542 F79A D0 F3 BNE RDHDL4 MOS74 0575 F7BB ^04 MOS74 0543 F79C MOS74 0575 F7BB ^04 MOS74 0544 F79C 98 RDHDEX TYA MOS74 0575 F7BB ^04 MOS74 0545 F79D AA TAX ;Preserve Y for exit MOS74 0575 F7BB ^04 MOS74 0546 F79E A9 00 LDAIM &00 MOS74 0575 F7BB ^04 MOS74 0547 F7A0 99 B2 03 STAAY INFO ;Terminate f.t. MOS74 0575 F7BB ^04 MOS74 0548 F7A3 A5 BE LDA CHKSUM MOS74 0575 F7BB ^04 MOS74 0549 F7A5 05 BF ORA CHKSUM +&01 MOS74 0575 F7BB ^04 MOS74 0550 F7A7 85 C1 STA HDRCRC ;Store CRC indication MOS74 0575 F7BB ^04 MOS74 0551 F7A9 20 6D FB RDHDX1 JSR SETJOB MOS74 0575 F7BB ^04 MOS74 0552 F7AC 84 C2 STY ITYPE ;If header interrupted => block fin. MOS74 0575 F7BB ^04 MOS74 0553 F7AE MOS74 0575 F7BB ^04 MOS74 0554 F7AE 8A TXA MOS74 0575 F7BB ^04 MOS74 0555 F7AF D0 1B BNE RDHDXX MOS74 0575 F7BB ^04 MOS74 0556 F7B1 MOS74 0575 F7BB ^04 MOS74 0557 F7B1 RDHEAD MOS74 0575 F7BB ^04 MOS74 0558 F7B1 MOS74 0575 F7BB ^04 MOS74 0559 F7B1 ;Read header info into INFO. Check file title MOS74 0575 F7BB ^04 MOS74 0560 F7B1 ;against FTPTR, and print header info. MOS74 0575 F7BB ^04 MOS74 0561 F7B1 MOS74 0575 F7BB ^04 MOS74 0562 F7B1 ;First, wait for DCD followed by "*" MOS74 0575 F7BB ^04 MOS74 0563 F7B1 MOS74 0575 F7BB ^04 MOS74 0564 F7B1 AD 47 02 LDA SROMSW MOS74 0575 F7BB ^04 MOS74 0565 F7B4 F0 AF BEQ RDHDL2 ;SFS not enabled, carry on MOS74 0575 F7BB ^04 MOS74 0566 F7B6 ;GoMMC tape patch has F77E NOP;NOP MOS74 0575 F7BB ^04 MOS74 0567 F7B6 MOS74 0575 F7BB ^04 MOS74 0568 F7B6 ;Here, SFS enabled, so read first char MOS74 0575 F7BB ^04 MOS74 0569 F7B6 ;(assumed to be "*") and go on to read MOS74 0575 F7BB ^04 MOS74 0570 F7B6 ;rest of block. MOS74 0575 F7BB ^04 MOS74 0571 F7B6 MOS74 0575 F7BB ^04 MOS74 0572 F7B6 RDHDLD MOS74 0575 F7BB ^04 MOS74 0573 F7B6 20 8D EE JSR RDSPCH MOS74 0575 F7BB ^04 MOS74 0574 F7B9 C9 2B CMPIM SFSEND ;Is "end of ROM" char ? MOS74 0575 F7BB ^04 MOS74 0575 F7BB D0 84 BNE RDHDLC MOS74 0555 F7AF v64 MOS74 0576 F7BD A9 08 LDAIM CATBIT MOS74 0555 F7AF v64 MOS74 0577 F7BF 25 E2 AND CFSTAT MOS74 0555 F7AF v64 MOS74 0578 F7C1 F0 03 BEQ RDHDL5 ;If not in CAT, don't do new line MOS74 0555 F7AF v64 MOS74 0579 F7C3 MOS74 0555 F7AF v64 MOS74 0580 F7C3 20 E9 F2 JSR NOOLIN ;New line between ROMs MOS74 0555 F7AF v64 MOS74 0581 F7C6 20 50 EE RDHDL5 JSR SRNEXT MOS74 0555 F7AF v64 MOS74 0582 F7C9 MOS74 0555 F7AF v64 MOS74 0583 F7C9 ;Carry clear => not at end of filing system, so MOS74 0555 F7AF v64 MOS74 0584 F7C9 ;read next character, assumed still to be start MOS74 0555 F7AF v64 MOS74 0585 F7C9 ;of header although in new rom. MOS74 0555 F7AF v64 MOS74 0586 F7C9 MOS74 0555 F7AF v64 MOS74 0587 F7C9 90 EB BCC RDHDLD MOS74 0555 F7AF v64 MOS74 0588 F7CB MOS74 0555 F7AF v64 MOS74 0589 F7CB ;Carry set => end of filing system, so MOS74 0555 F7AF v64 MOS74 0590 F7CB ;indicate to outside world in V flag MOS74 0555 F7AF v64 MOS74 0591 F7CB B8 CLV MOS74 0555 F7AF v64 MOS74 0592 F7CC [ MOS125 = &FF MOS74 0555 F7AF v64 MOS74 0593 F7CC | MOS74 0555 F7AF v64 MOS74 0594 F7CC RDHDXX MOS74 0555 F7AF v64 MOS74 0595 F7CC ] MOS74 0555 F7AF v64 MOS74 0596 F7CC 60 RTS -- MOS74 0597 F7CD -- MOS74 0598 F7CD ;Note assumed exit with Y = 0 -- MOS74 0599 F7CD ;for LOAD and RDBFRS -- MOS74 0600 F7CD -- MOS74 0601 F7CD -- MOS74 0602 F7CD -- MOS74 0603 F7CD -- MOS74 0604 F7CD -- MOS74 0605 F7CD CASIN -- MOS74 0606 F7CD AD 47 02 LDA SROMSW ;is SFS on ? -- MOS74 0607 F7D0 F0 11 BEQ CASIN1 ;Nope, read from tape MOS74 0607 F7D0 v6E MOS74 0608 F7D2 ;GoMMC tape patch has F79A NOP;NOP MOS74 0607 F7D0 v6E MOS74 0609 F7D2 MOS74 0607 F7D0 v6E MOS74 0610 F7D2 ;Force a read from ROM & set IRUPT flag MOS74 0607 F7D0 v6E MOS74 0611 F7D2 MOS74 0607 F7D0 v6E MOS74 0612 F7D2 8A TXA MOS74 0607 F7D0 v6E MOS74 0613 F7D3 48 PHA MOS74 0607 F7D0 v6E MOS74 0614 F7D4 98 TYA MOS74 0607 F7D0 v6E MOS74 0615 F7D5 48 PHA MOS74 0607 F7D0 v6E MOS74 0616 F7D6 20 8D EE JSR RDSPCH MOS74 0607 F7D0 v6E MOS74 0617 F7D9 85 BD STA IBUF MOS74 0607 F7D0 v6E MOS74 0618 F7DB A9 FF LDAIM &FF MOS74 0607 F7D0 v6E MOS74 0619 F7DD 85 C0 STA IFLAG ;=> irupt occurred, no DCD MOS74 0607 F7D0 v6E MOS74 0620 F7DF 68 PLA MOS74 0607 F7D0 v6E MOS74 0621 F7E0 A8 TAY MOS74 0607 F7D0 v6E MOS74 0622 F7E1 68 PLA MOS74 0607 F7D0 v6E MOS74 0623 F7E2 AA TAX MOS74 0607 F7D0 v6E MOS74 0624 F7E3 MOS74 0607 F7D0 v6E MOS74 0625 F7E3 20 AD F8 CASIN1 JSR IWAIT -- MOS74 0626 F7E6 -- MOS74 0627 F7E6 ;Note A=IBUF after IWAIT -- MOS74 0628 F7E6 -- MOS74 0629 F7E6 [ DEBUG=0 -- MOS74 0635 F7E6 ] -- MOS74 0636 F7E6 -- MOS74 0637 F7E6 [ MOS125 = &FF -- MOS74 0667 F7E6 | -- MOS74 0668 F7E6 ;Can't move to MOS05 to branch to OCSREX, fallthrough from CASIN1! -- MOS74 0669 F7E6 08 ADDCRC PHP -- MOS74 0670 F7E7 48 PHA -- MOS74 0671 F7E8 -- MOS74 0672 F7E8 0021 CCITTL * &21 -- MOS74 0673 F7E8 0010 CCITTH * &10 -- MOS74 0674 F7E8 MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 138 MOS74 C.F.S. UTILITIES - MOS74 MOS74 -- MOS74 0675 F7E8 45 BF EOR CHKSUM +&01 -- MOS74 0676 F7EA 38 SEC -- MOS74 0677 F7EB 66 BF ROR CHKSUM +&01 -- MOS74 0678 F7ED 06 BE CRC1 ASL CHKSUM MOS74 0688 F7FE ^6D MOS74 0679 F7EF 2A ROLA MOS74 0688 F7FE ^6D MOS74 0680 F7F0 90 0A BCC CRC2 MOS74 0688 F7FE ^6D MOS74 0681 F7F2 48 PHA MOS74 0688 F7FE ^6D MOS74 0682 F7F3 A5 BE LDA CHKSUM MOS74 0688 F7FE ^6D MOS74 0683 F7F5 49 21 EORIM CCITTL MOS74 0688 F7FE ^6D MOS74 0684 F7F7 85 BE STA CHKSUM MOS74 0688 F7FE ^6D MOS74 0685 F7F9 68 PLA MOS74 0688 F7FE ^6D MOS74 0686 F7FA 49 10 EORIM CCITTH MOS74 0688 F7FE ^6D MOS74 0687 F7FC 46 BF CRC2 LSR CHKSUM +&01 MOS74 0688 F7FE ^6D MOS74 0688 F7FE D0 ED BNE CRC1 -- MOS74 0689 F800 85 BF STA CHKSUM +&01 -- MOS74 0690 F802 68 PLA -- MOS74 0691 F803 28 PLP -- MOS74 0692 F804 60 RTS -- MOS74 0693 F805 ] -- MOS74 0694 F805 -- MOS74 0695 F805 -- MOS74 0696 F805 -- MOS74 0697 F805 -- MOS74 0698 F805 RDBLOK -- MOS74 0699 F805 -- MOS74 0700 F805 READBK -- MOS74 0701 F805 -- MOS74 0702 F805 ;Sets up BG job to read data into BKADDR -- MOS74 0703 F805 ;and read CRC. -- MOS74 0704 F805 -- MOS74 0705 F805 ;Note: must not corrupt Y ! -- MOS74 0706 F805 -- MOS74 0707 F805 A9 00 LDAIM &00 -- MOS74 0708 F807 85 BD CHKBIN STA IBUF ;Indicate read to memory -- MOS74 0709 F809 A2 00 LDXIM &00 -- MOS74 0710 F80B 86 BC STX TEMP ;Pointer into data -- MOS74 0711 F80D ;If empty, data read finished, X=$00 -- MOS74 0712 F80D 50 0A BVC RDBKEM ;If V clear from header read MOS74 0712 F80D v75 MOS74 0713 F80F ;just ignore all data (since hdr. MOS74 0712 F80D v75 MOS74 0714 F80F ;interrupted by DCD). MOS74 0712 F80D v75 MOS74 0715 F80F MOS74 0712 F80D v75 MOS74 0716 F80F AD C8 03 LDA INFO +BKSZEL MOS74 0712 F80D v75 MOS74 0717 F812 0D C9 03 ORA INFO +BKSZEH MOS74 0712 F80D v75 MOS74 0718 F815 F0 02 BEQ RDBKEM ;Empty block => no BG job MOS74 0712 F80D v75 MOS74 0719 F817 MOS74 0712 F80D v75 MOS74 0720 F817 A2 04 LDXIM &04 MOS74 0712 F80D v75 MOS74 0721 F819 86 C2 RDBKEM STX ITYPE -- MOS74 0722 F81B -- MOS74 0723 F81B ;V not important from here on -- MOS74 0724 F81B -- MOS74 0725 F81B 60 RTS -- MOS74 0726 F81C -- MOS74 0727 F81C -- MOS74 0728 F81C -- MOS74 0729 F81C -- MOS74 0730 F81C WRBLOK -- MOS74 0731 F81C -- MOS74 0732 F81C WBLOCK -- MOS74 0733 F81C -- MOS74 0734 F81C ;Write block pointed to by BKADDR. Expects header info -- MOS74 0735 F81C ;to be in INFO and file name in FILNAM. -- MOS74 0736 F81C -- MOS74 0737 F81C ;Assumes 6850 is in reset state, and SERPROC -- MOS74 0738 F81C ;is set with motor on. -- MOS74 0739 F81C -- MOS74 0740 F81C 08 PHP ;Save I'rupt state -- MOS74 0741 F81D A2 03 LDXIM &03 ;Set spare bytes -- MOS74 0742 F81F A9 00 LDAIM &00 -- MOS74 0743 F821 9D CB 03 SETSPR STAAX INFO +BKSPAR MOS74 0745 F825 ^7A MOS74 0744 F824 CA DEX MOS74 0745 F825 ^7A MOS74 0745 F825 10 FA BPL SETSPR -- MOS74 0746 F827 -- MOS74 0747 F827 AD C6 03 LDA INFO +BKNOLO -- MOS74 0748 F82A 0D C7 03 ORA INFO +BKNOHI -- MOS74 0749 F82D D0 05 BNE WRBKL5 ;Not first block, continue MOS74 0749 F82D v7A MOS74 0750 F82F 20 BB F8 JSR LEADER MOS74 0749 F82D v7A MOS74 0751 F832 F0 03 BEQ WRBKL4 ;Always Z exit MOS74 0749 F82D v7A MOS74 0752 F834 MOS74 0749 F82D v7A MOS74 0753 F834 20 BF F8 WRBKL5 JSR PUTGAP ;Put out inter-block gap MOS74 0751 F832 v7C MOS74 0754 F837 MOS74 0751 F832 v7C MOS74 0755 F837 A9 2A WRBKL4 LDAIM "*" -- MOS74 0756 F839 85 BD STA IBUF ;Start of block char is output IMMEDIATELY -- MOS74 0757 F83B ;on TXINIT. -- MOS74 0758 F83B -- MOS74 0759 F83B 20 6D FB JSR SETJOB -- MOS74 0760 F83E -- MOS74 0761 F83E 20 3F FB JSR TXINIT ;Get 6850 ready -- MOS74 0762 F841 20 AD F8 JSR IWAIT ;Wait for * to go out -- MOS74 0763 F844 -- MOS74 0764 F844 88 DEY ;Set zero by SETJOB -- MOS74 0765 F845 C8 WRBKL1 INY MOS74 0772 F84F ^74 MOS74 0766 F846 B9 D2 03 LDAAY FILNAM ;Set Z flag if file terminator MOS74 0772 F84F ^74 MOS74 0767 F849 99 B2 03 STAAY INFO ;PRTHDR expects INFO to have f.t. in it MOS74 0772 F84F ^74 MOS74 0768 F84C 20 74 F0 JSR PUTCHK MOS74 0772 F84F ^74 MOS74 0769 F84F MOS74 0772 F84F ^74 MOS74 0770 F84F ;Note Z flag kept over PUTCHK MOS74 0772 F84F ^74 MOS74 0771 F84F MOS74 0772 F84F ^74 MOS74 0772 F84F D0 F4 BNE WRBKL1 ;File title out. -- MOS74 0773 F851 -- MOS74 0774 F851 A2 0C LDXIM BKINFO -- MOS74 0775 F853 BD B2 03 WRBKL2 LDAAX INFO ;Rest of header to tape MOS74 0779 F85C ^75 MOS74 0776 F856 20 74 F0 JSR PUTCHK MOS74 0779 F85C ^75 MOS74 0777 F859 E8 INX MOS74 0779 F85C ^75 MOS74 0778 F85A E0 1D CPXIM BKLAST MOS74 0779 F85C ^75 MOS74 0779 F85C D0 F5 BNE WRBKL2 -- MOS74 0780 F85E -- MOS74 0781 F85E 20 A4 F8 JSR PUTCRC -- MOS74 0782 F861 -- MOS74 0783 F861 AD C8 03 LDA INFO +BKSZEL -- MOS74 0784 F864 0D C9 03 ORA INFO +BKSZEH -- MOS74 0785 F867 F0 1B BEQ WRBKEM ;Empty block MOS74 0785 F867 v64 MOS74 0786 F869 MOS74 0785 F867 v64 MOS74 0787 F869 [ MOS125 = &FF MOS74 0785 F867 v64 MOS74 0789 F869 ] MOS74 0785 F867 v64 MOS74 0790 F869 20 71 FB JSR SETJB1 MOS74 0785 F867 v64 MOS74 0791 F86C WRBKL3 MOS74 0785 F867 v64 MOS74 0792 F86C [ MOS125 = &FF MOS74 0785 F867 v64 MOS74 0804 F86C | MOS74 0785 F867 v64 MOS74 0805 F86C [ TUBESW=0 MOS74 0785 F867 v64 MOS74 0806 F86C 20 C6 FB JSR TUBCHK ;Check tube present and top two bytes of address MOS74 0785 F867 v64 MOS74 0807 F86F F0 05 BEQ WRBKL6 ;Yes, continue. (Note TAX done in TUBCHK) MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 139 MOS74 C.F.S. UTILITIES - MOS74 MOS74 MOS74 0785 F867 v64 MOS74 0808 F871 AD E5 FE LDA TREG3 ;No, get from tube MOS74 0785 F867 v64 MOS74 0809 F874 90 02 BCC WRBKL7 ;skip IO read (always; TUBCHK returns CC if Tube) MOS74 0785 F867 v64 MOS74 0810 F876 MOS74 0785 F867 v64 MOS74 0811 F876 WRBKL6 MOS74 0785 F867 v64 MOS74 0812 F876 B1 B0 LDAIY BKADDR ;Load byte from IO proc. MOS74 0785 F867 v64 MOS74 0813 F878 WRBKL7 MOS74 0785 F867 v64 MOS74 0814 F878 | MOS74 0785 F867 v64 MOS74 0816 F878 ] MOS74 0785 F867 v64 MOS74 0817 F878 ] MOS74 0785 F867 v64 MOS74 0818 F878 MOS74 0785 F867 v64 MOS74 0819 F878 20 74 F0 JSR PUTCHK ;Output data MOS74 0785 F867 v64 MOS74 0820 F87B C8 INY MOS74 0785 F867 v64 MOS74 0821 F87C CC C8 03 CPY INFO +BKSZEL MOS74 0785 F867 v64 MOS74 0822 F87F D0 EB BNE WRBKL3 MOS74 0785 F867 v64 MOS74 0823 F881 MOS74 0785 F867 v64 MOS74 0824 F881 20 A4 F8 JSR PUTCRC MOS74 0785 F867 v64 MOS74 0825 F884 20 AD F8 WRBKEM JSR IWAIT ;Wait for irupt => char on tape -- MOS74 0826 F887 20 AD F8 JSR IWAIT -- MOS74 0827 F88A 20 3B FB JSR CRESET ;Reset for interblock gap -- MOS74 0828 F88D A9 01 LDAIM &01 -- MOS74 0829 F88F 20 C1 F8 JSR PAUSE ;1/10 sec delay to clear heads -- MOS74 0830 F892 28 PLP ;Restore I'rupt status -- MOS74 0831 F893 -- MOS74 0832 F893 20 E2 F8 JSR SAVHDR ;Finally, print info -- MOS74 0833 F896 2C CA 03 BIT INFO +BKFLAG -- MOS74 0834 F899 10 08 BPL WRBKEX ;Not last block MOS74 0834 F899 v77 MOS74 0835 F89B 08 PHP MOS74 0834 F899 v77 MOS74 0836 F89C 20 BB F8 JSR TAIL MOS74 0834 F899 v77 MOS74 0837 F89F 20 E2 F2 JSR FINOP MOS74 0834 F899 v77 MOS74 0838 F8A2 28 PLP MOS74 0834 F899 v77 MOS74 0839 F8A3 MOS74 0834 F899 v77 MOS74 0840 F8A3 ;Exit MI if last block, PL otherwise MOS74 0834 F899 v77 MOS74 0841 F8A3 60 WRBKEX RTS -- MOS74 0842 F8A4 -- MOS74 0843 F8A4 -- MOS74 0844 F8A4 -- MOS74 0845 F8A4 -- MOS74 0846 F8A4 -- MOS74 0847 F8A4 -- MOS74 0848 F8A4 [ MOS125 = &FF -- MOS74 0855 F8A4 ] -- MOS74 0856 F8A4 -- MOS74 0857 F8A4 -- MOS74 0858 F8A4 -- MOS74 0859 F8A4 -- MOS74 0860 F8A4 A5 BF PUTCRC LDA CHKSUM +&01 -- MOS74 0861 F8A6 20 AB F8 JSR PUTCAS -- MOS74 0862 F8A9 A5 BE LDA CHKSUM -- MOS74 0863 F8AB -- MOS74 0864 F8AB -- MOS74 0865 F8AB PUTCAS -- MOS74 0866 F8AB -- MOS74 0867 F8AB ;Put byte to cassette -- MOS74 0868 F8AB -- MOS74 0869 F8AB 85 BD STA IBUF -- MOS74 0870 F8AD -- MOS74 0871 F8AD 20 8B F9 IWAIT JSR ESCAPE MOS74 0873 F8B2 ^79 MOS74 0872 F8B0 24 C0 BIT IFLAG MOS74 0873 F8B2 ^79 MOS74 0873 F8B2 10 F9 BPL IWAIT -- MOS74 0874 F8B4 -- MOS74 0875 F8B4 A9 00 LDAIM &00 -- MOS74 0876 F8B6 85 C0 STA IFLAG ;Zero IFLAG -- MOS74 0877 F8B8 A5 BD LDA IBUF ;Restore A -- MOS74 0878 F8BA 60 RTS ;Note V preserved -- MOS74 0879 F8BB -- MOS74 0880 F8BB -- MOS74 0881 F8BB -- MOS74 0882 F8BB LEADER -- MOS74 0883 F8BB -- MOS74 0884 F8BB TAIL -- MOS74 0885 F8BB -- MOS74 0886 F8BB ;Assumes RESET done by WRBLOK -- MOS74 0887 F8BB -- MOS74 0888 F8BB A9 32 LDAIM &32 -- MOS74 0889 F8BD D0 02 BNE PAUSE ;5 secs hitone altogether. MOS74 0889 F8BD v7D MOS74 0890 F8BF MOS74 0889 F8BD v7D MOS74 0891 F8BF MOS74 0889 F8BD v7D MOS74 0892 F8BF MOS74 0889 F8BD v7D MOS74 0893 F8BF PUTGAP MOS74 0889 F8BD v7D MOS74 0894 F8BF MOS74 0889 F8BD v7D MOS74 0895 F8BF ;Note is assumed indivisible by PUTBYT MOS74 0889 F8BD v7D MOS74 0896 F8BF MOS74 0889 F8BD v7D MOS74 0897 F8BF A5 C7 LDA GAPTIM MOS74 0889 F8BD v7D MOS74 0898 F8C1 MOS74 0889 F8BD v7D MOS74 0899 F8C1 PAUSE MOS74 0889 F8BD v7D MOS74 0900 F8C1 MOS74 0889 F8BD v7D MOS74 0901 F8C1 ;Pause for A/10 secs (while putting out MOS74 0889 F8BD v7D MOS74 0902 F8C1 ;leaders and gaps mainly). MOS74 0889 F8BD v7D MOS74 0903 F8C1 MOS74 0889 F8BD v7D MOS74 0904 F8C1 A2 05 LDXIM &05 -- MOS74 0905 F8C3 8D 40 02 PSLOP1 STA CYCLE MOS74 0910 F8CF ^72 MOS74 0906 F8C6 20 8B F9 PSLOOP JSR ESCAPE MOS74 0910 F8CF ^72 MOS74 0907 F8C9 2C 40 02 BIT CYCLE MOS74 0910 F8CF ^72 MOS74 0908 F8CC 10 F8 BPL PSLOOP MOS74 0910 F8CF ^72 MOS74 0909 F8CE CA DEX MOS74 0910 F8CF ^72 MOS74 0910 F8CF D0 F2 BNE PSLOP1 -- MOS74 0911 F8D1 60 RTS -- MOS74 0912 F8D2 -- MOS74 0913 F8D2 -- MOS74 0914 F8D2 -- MOS74 0915 F8D2 PRTHDR -- MOS74 0916 F8D2 -- MOS74 0917 F8D2 ;Print header details. -- MOS74 0918 F8D2 ;Keeps count of file size and prints -- MOS74 0919 F8D2 ;total file length when last block is indicated. -- MOS74 0920 F8D2 ;Expects block info to be in INFO. -- MOS74 0921 F8D2 -- MOS74 0922 F8D2 -- MOS74 0923 F8D2 AD C6 03 LDA INFO +BKNOLO -- MOS74 0924 F8D5 0D C7 03 ORA INFO +BKNOHI -- MOS74 0925 F8D8 F0 05 BEQ PRTHL8 ;If first block, is new file MOS74 0925 F8D8 v7A MOS74 0926 F8DA 2C DF 03 BIT OLDFLG ;If previous block = last block MOS74 0925 F8D8 v7A MOS74 0927 F8DD 10 03 BPL PRTHL3 ;then new line MOS74 0925 F8D8 v7A MOS74 0928 F8DF MOS74 0925 F8D8 v7A MOS74 0929 F8DF PRTHDL MOS74 0925 F8D8 v7A MOS74 0930 F8DF 20 E5 F2 PRTHL8 JSR NOOLN1 ;New line if messages on and no error MOS74 0927 F8DD v7C MOS74 0931 F8E2 MOS74 0927 F8DD v7C MOS74 0932 F8E2 SAVHDR MOS74 0927 F8DD v7C MOS74 0933 F8E2 MOS74 0927 F8DD v7C MOS74 0934 F8E2 ;Entry from WRBLOK MOS74 0927 F8DD v7C MOS74 0935 F8E2 MOS74 MOS74 MOS74 MOS74 Acorn macro assembler Page 140 MOS74 C.F.S. UTILITIES - MOS74 MOS74 MOS74 0927 F8DD v7C MOS74 0936 F8E2 [ MOS125 = &7F MOS74 0927 F8DD v7C MOS74 0937 F8E2 ;Set FSIZE here for correct OSFILE block whether messages on/off MOS74 0927 F8DD v7C MOS74 0938 F8E2 PRTHL3 MOS74 0927 F8DD v7C MOS74 0939 F8E2 AD C8 03 LDA INFO +BKSZEL -- MOS74 0940 F8E5 85 CC STA FSIZE -- MOS74 0941 F8E7 AD C6 03 LDA INFO +BKNOLO -- MOS74 0942 F8EA 18 CLC -- MOS74 0943 F8EB 6D C9 03 ADC INFO +BKSZEH -- MOS74 0944 F8EE 85 CD STA FSIZE + 1 -- MOS74 0945 F8F0 A0 00 LDYIM &00 -- MOS74 0946 F8F2 | -- MOS74 0948 F8F2 ] -- MOS74 0949 F8F2 84 BA STY ERRSW -- MOS74 0950 F8F4 AD CA 03 LDA INFO +BKFLAG -- MOS74 0951 F8F7 8D DF 03 STA OLDFLG ;Set prev. flag -- MOS74 0952 F8FA -- MOS74 0953 F8FA -- MOS74 0954 F8FA 20 5B EA JSR MSGON -- MOS74 0955 F8FD F0 61 BEQ PRTHLX ;Messages off => exit MOS74 0955 F8FD v1E MOS74 0956 F8FF MOS74 0955 F8FD v1E MOS74 0957 F8FF [ MOS125 = &FF MOS74 0955 F8FD v1E MOS74 0960 F8FF | MOS74 0955 F8FD v1E MOS74 0961 F8FF 20 EC FF JSR WRCR MOS74 0955 F8FD v1E MOS74 0962 F902 ] MOS74 0955 F8FD v1E MOS74 0963 F902 MOS74 0955 F8FD v1E MOS74 0964 F902 ; Note assumed here Y is preserved over MOS74 0955 F8FD v1E MOS74 0965 F902 ;calls to MSGON and OSWRCH. MOS74 0955 F8FD v1E MOS74 0966 F902 MOS74 0955 F8FD v1E MOS74 0967 F902 B9 B2 03 PRTHL1 LDAAY INFO MOS74 0955 F8FD v1E MOS74 0968 F905 F0 10 BEQ PRTHL2 ;Zero terminator for filename MOS74 0955 F8FD v1E MOS74 0969 F907 MOS74 0955 F8FD v1E MOS74 0970 F907 C9 20 CMPIM &20 MOS74 0955 F8FD v1E MOS74 0971 F909 90 04 BCC PRTHLD ;A<$20 => control char => invalid MOS74 0955 F8FD v1E MOS74 0972 F90B C9 7F CMPIM &7F MOS74 0955 F8FD v1E MOS74 0973 F90D 90 02 BCC PRTHLC ;$20<=A<$7F => Valid MOS74 0955 F8FD v1E MOS74 0974 F90F MOS74 0955 F8FD v1E MOS74 0975 F90F A9 3F PRTHLD LDAIM "?" ;Otherwise, print ?? MOS74 0955 F8FD v1E MOS74 0976 F911 20 EE FF PRTHLC JSR OSWRCH ;Write file title MOS74 0955 F8FD v1E MOS74 0977 F914 C8 INY MOS74 0955 F8FD v1E MOS74 0978 F915 D0 EB BNE PRTHL1 MOS74 0955 F8FD v1E MOS74 0979 F917 MOS74 0955 F8FD v1E MOS74 0980 F917 AD 47 02 PRTHL2 LDA SROMSW MOS74 0955 F8FD v1E MOS74 0981 F91A F0 04 BEQ PRTHLF ;In CFS -> continue MOS74 0955 F8FD v1E MOS74 0982 F91C 24 BB BIT USFLGS MOS74 0955 F8FD v1E MOS74 0983 F91E 50 40 BVC PRTHLX ;SFS short msgs => file name only MOS74 0955 F8FD v1E MOS74 0984 F920 MOS74 0955 F8FD v1E MOS74 0985 F920 20 87 F9 PRTHLF JSR PRTSP MOS74 0955 F8FD v1E MOS74 0986 F923 C8 INY MOS74 0955 F8FD v1E MOS74 0987 F924 C0 0B CPYIM FTSIZE MOS74 0955 F8FD v1E MOS74 0988 F926 90 EF BCC PRTHL2 MOS74 0955 F8FD v1E MOS74 0989 F928 MOS74 0955 F8FD v1E MOS74 0990 F928 AD C6 03 LDA INFO +BKNOLO MOS74 0955 F8FD v1E MOS74 0991 F92B AA TAX ;Store for final length MOS74 0955 F8FD v1E MOS74 0992 F92C 20 71 F9 JSR WHEX ;Write block no. lo MOS74 0955 F8FD v1E MOS74 0993 F92F MOS74 0955 F8FD v1E MOS74 0994 F92F 2C CA 03 BIT INFO +BKFLAG MOS74 0955 F8FD v1E MOS74 0995 F932 10 2C BPL PRTHLX ;Not last block -> finish MOS74 0955 F8FD v1E MOS74 0996 F934 MOS74 0955 F8FD v1E MOS74 0997 F934 ;Here, is last block -> print total length MOS74 0955 F8FD v1E MOS74 0998 F934 MOS74 0955 F8FD v1E MOS74 0999 F934 [ MOS125 = &7F MOS74 0955 F8FD v1E MOS74 1000 F934 A5 CD LDA FSIZE + 1 MOS74 0955 F8FD v1E MOS74 1001 F936 20 6C F9 JSR WSPHEX MOS74 0955 F8FD v1E MOS74 1002 F939 A5 CC LDA FSIZE MOS74 0955 F8FD v1E MOS74 1003 F93B | MOS74 0955 F8FD v1E MOS74 1015 F93B ] MOS74 0955 F8FD v1E MOS74 1016 F93B 20 71 F9 JSR WHEX MOS74 0955 F8FD v1E MOS74 1017 F93E MOS74 0955 F8FD v1E MOS74 1018 F93E 24 BB BIT USFLGS MOS74 0955 F8FD v1E MOS74 1019 F940 50 1E BVC PRTHLX ;=> Short messages => exit MOS74 0955 F8FD v1E MOS74 1020 F942 MOS74 0955 F8FD v1E MOS74 1021 F942 ;Here doing long messages MOS74 0955 F8FD v1E MOS74 1022 F942 MOS74 0955 F8FD v1E MOS74 1023 F942 A2 04 LDXIM &04 MOS74 0955 F8FD v1E MOS74 1024 F944 20 87 F9 PRTHLV JSR PRTSP MOS74 0955 F8FD v1E MOS74 1025 F947 CA DEX MOS74 0955 F8FD v1E MOS74 1026 F948 D0 FA BNE PRTHLV MOS74 0955 F8FD v1E MOS74 1027 F94A MOS74 0955 F8FD v1E MOS74 1028 F94A A2 0F LDXIM BKLOAD +&03 MOS74 0955 F8FD v1E MOS74 1029 F94C 20 54 F9 JSR PRTHLT MOS74 0955 F8FD v1E MOS74 1030 F94F 20 87 F9 JSR PRTSP MOS74 0955 F8FD v1E MOS74 1031 F952 A2 13 LDXIM BKEXEC +&03 MOS74 0955 F8FD v1E MOS74 1032 F954 MOS74 0955 F8FD v1E MOS74 1033 F954 A0 04 PRTHLT LDYIM &04 MOS74 0955 F8FD v1E MOS74 1034 F956 BD B2 03 PRTHLU LDAAX INFO MOS74 0955 F8FD v1E MOS74 1035 F959 20 71 F9 JSR WHEX MOS74 0955 F8FD v1E MOS74 1036 F95C CA DEX MOS74 0955 F8FD v1E MOS74 1037 F95D 88 DEY MOS74 0955 F8FD v1E MOS74 1038 F95E D0 F6 BNE PRTHLU MOS74 0955 F8FD v1E MOS74 1039 F960 MOS74 0955 F8FD v1E MOS74 1040 F960 [ MOS125 = &FF MOS74 0955 F8FD v1E MOS74 1042 F960 ] MOS74 0955 F8FD v1E MOS74 1043 F960 60 PRTHLX RTS -- MOS74 1044 F961 -- MOS74 1045 F961 -- MOS74 1046 F961 -- MOS74 1047 F961 -- MOS74 1048 F961 [ MOS125 = &FF -- MOS74 1070 F961 ] -- MOS74 1071 F961 -- MOS74 1072 F961 -- MOS74 1073 F961 LNK MOS76 -- MOS76 0001 F961 -- MOS76 0002 F961 TTL C.F.S. - I/O Utilities -> MOS76 -- MOS76 0003 F961 OPT MOS76 MOS76 MOS76 MOS76 MOS76 Acorn macro assembler Page 141 MOS76 C.F.S. - I/O Utilities -> MOS76 MOS76 -- MOS76 0004 F961 -- MOS76 0005 F961 -- MOS76 0006 F961 ;****** UTILITIES II ****** -- MOS76 0007 F961 -- MOS76 0008 F961 ADDBKA -- MOS76 0009 F961 -- MOS76 0010 F961 ;Increment block pointer by 256 bytes, assuming that -- MOS76 0011 F961 ;block received is 256 bytes long. Note BKADDR is 4 bytes -- MOS76 0012 F961 -- MOS76 0013 F961 E6 B1 INC BKADDR +&01 -- MOS76 0014 F963 D0 06 BNE ADDBK1 MOS76 0014 F963 v79 MOS76 0015 F965 E6 B2 INC BKADDR +&02 MOS76 0014 F963 v79 MOS76 0016 F967 D0 02 BNE ADDBK1 MOS76 0014 F963 v79 MOS76 0017 F969 E6 B3 INC BKADDR +&03 MOS76 0014 F963 v79 MOS76 0018 F96B 60 ADDBK1 RTS -- MOS76 0019 F96C -- MOS76 0020 F96C -- MOS76 0021 F96C -- MOS76 0022 F96C -- MOS76 0023 F96C 48 WSPHEX PHA -- MOS76 0024 F96D 20 87 F9 JSR PRTSP -- MOS76 0025 F970 68 PLA -- MOS76 0026 F971 48 WHEX PHA -- MOS76 0027 F972 4A LSRA -- MOS76 0028 F973 4A LSRA -- MOS76 0029 F974 4A LSRA -- MOS76 0030 F975 4A LSRA -- MOS76 0031 F976 20 7A F9 JSR WDIGIT -- MOS76 0032 F979 68 PLA -- MOS76 0033 F97A [ MOS125 = &FF -- MOS76 0037 F97A | -- MOS76 0038 F97A 29 0F WDIGIT ANDIM &0F -- MOS76 0039 F97C 09 30 ORAIM "0" -- MOS76 0040 F97E ] -- MOS76 0041 F97E C9 3A CMPIM &3A -- MOS76 0042 F980 90 02 BCC HXDSKP MOS76 0042 F980 v7D MOS76 0043 F982 69 06 ADCIM &06 MOS76 0042 F980 v7D MOS76 0044 F984 4C EE FF HXDSKP JMP OSWRCH MOS76 0050 F989 ^79 MOS76 0045 F987 MOS76 0050 F989 ^79 MOS76 0046 F987 MOS76 0050 F989 ^79 MOS76 0047 F987 MOS76 0050 F989 ^79 MOS76 0048 F987 MOS76 0050 F989 ^79 MOS76 0049 F987 A9 20 PRTSP LDAIM SPACE MOS76 0050 F989 ^79 MOS76 0050 F989 D0 F9 BNE HXDSKP -- MOS76 0051 F98B -- MOS76 0052 F98B -- MOS76 0053 F98B ESCAPE -- MOS76 0054 F98B -- MOS76 0055 F98B ;Checks ESCAPE happened. If so, does error -- MOS76 0056 F98B ;break with appropriate message after -- MOS76 0057 F98B ;acknowldging the ESCAPE. -- MOS76 0058 F98B -- MOS76 0059 F98B ;Also switches off various status bits -- MOS76 0060 F98B ;Motor switched OFF -- MOS76 0061 F98B -- MOS76 0062 F98B ;Note, no test is done if inside WRCH or RDCH -- MOS76 0063 F98B ;so that ESCAPE cannot occur inside EXEC/SPOOL -- MOS76 0064 F98B -- MOS76 0065 F98B 08 PHP -- MOS76 0066 F98C 24 EB BIT ESSEMA -- MOS76 0067 F98E 30 04 BMI ESCLL0 ;Inside WRCH or RDCH -> no ESCAPE MOS76 0067 F98E v7B MOS76 0068 F990 24 FF BIT ESCADD MOS76 0067 F98E v7B MOS76 0069 F992 30 02 BMI ESCERR MOS76 0067 F98E v7B MOS76 0070 F994 ESCLL0 MOS76 0067 F98E v7B MOS76 0071 F994 28 PLP MOS76 0069 F992 v7D MOS76 0072 F995 60 RTS MOS76 0069 F992 v7D MOS76 0073 F996 MOS76 0069 F992 v7D MOS76 0074 F996 ESCERR MOS76 0069 F992 v7D MOS76 0075 F996 MOS76 0069 F992 v7D MOS76 0076 F996 20 40 F3 JSR CATOFF ;Switch CAT bit off -- MOS76 0077 F999 20 E7 FA JSR CASMOF ;Motor OFF/release -- MOS76 0078 F99C -- MOS76 0079 F99C A9 7E LDAIM &7E -- MOS76 0080 F99E 20 F4 FF JSR OSBYTE ;Acknowledge ESC to MOS -- MOS76 0081 F9A1 -- MOS76 0082 F9A1 00 BRK ;Then error -- MOS76 0083 F9A2 11 45 73 = &11,"Escape",0 -- MOS76 0084 F9AA -- MOS76 0085 F9AA -- MOS76 0086 F9AA -- MOS76 0087 F9AA -- MOS76 0088 F9AA -- MOS76 0089 F9AA 98 LODHDR TYA -- MOS76 0090 F9AB F0 0D BEQ LODHD1 ;Print message depending on Y MOS76 0090 F9AB v72 MOS76 0091 F9AD 20 3B FA JSR MSGOUT MOS76 0090 F9AB v72 MOS76 0092 F9B0 0D 4C 6F = MCR,"Loading",MCR,0 MOS76 0090 F9AB v72 MOS76 0093 F9BA MOS76 0090 F9AB v72 MOS76 0094 F9BA MOS76 0090 F9AB v72 MOS76 0095 F9BA MOS76 0090 F9AB v72 MOS76 0096 F9BA LODHD1 MOS76 0090 F9AB v72 MOS76 0097 F9BA MOS76 0090 F9AB v72 MOS76 0098 F9BA 85 BA STA ERRSW ;A always zero at this point -- MOS76 0099 F9BC ;Set ERRSW so always extra line after "Loading" -- MOS76 0100 F9BC ;and before file name. -- MOS76 0101 F9BC -- MOS76 0102 F9BC -- MOS76 0103 F9BC A2 FF LDXIM &FF ;Set "abort if nesc." flag -- MOS76 0104 F9BE A5 C1 LDA HDRCRC -- MOS76 0105 F9C0 D0 0D BNE HDRCHK ;Header CRC error takes precedence over MOS76 0105 F9C0 v72 MOS76 0106 F9C2 ;file and block errors, since a header error may MOS76 0105 F9C0 v72 MOS76 0107 F9C2 ;spuriously cause either or both of these. MOS76 0105 F9C0 v72 MOS76 0108 F9C2 MOS76 0105 F9C0 v72 MOS76 0109 F9C2 20 67 FA JSR CMPFT MOS76 0105 F9C0 v72 MOS76 0110 F9C5 MOS76 0105 F9C0 v72 MOS76 0111 F9C5 08 PHP ;Store EQ bit from CMPFT MOS76 0105 F9C0 v72 MOS76 0112 F9C6 A2 FF LDXIM &FF ;Set "abort if nesc." flag MOS76 0105 F9C0 v72 MOS76 0113 F9C8 A0 8E LDYIM FILEER MOS76 0105 F9C0 v72 MOS76 0114 F9CA A9 FA LDAIM /(FILEER ) ;Set error pointers MOS76 0105 F9C0 v72 MOS76 0115 F9CC 28 PLP MOS76 0105 F9C0 v72 MOS76 0116 F9CD MOS76 0105 F9C0 v72 MOS76 0117 F9CD D0 1C BNE TAPER0 ;Files don't match MOS76 0117 F9CD v63 MOS76 0118 F9CF MOS76 0117 F9CD v63 MOS76 0119 F9CF CATERR ;Entry from catalogue here MOS76 0117 F9CD v63 MOS76 0120 F9CF HDRCHK MOS76 0117 F9CD v63 MOS76 0121 F9CF A0 83 LDYIM DATAER ;Set lo byte of error pointer MOS76 0117 F9CD v63 MOS76 0122 F9D1 A5 C1 LDA HDRCRC ;Was header CRC ok ? MOS76 0117 F9CD v63 MOS76 0123 F9D3 F0 04 BEQ CHKBKN ;Yes, check block no. MOS76 0117 F9CD v63 MOS76 0124 F9D5 A9 FA LDAIM /(DATAER ) ;No, do error MOS76 0117 F9CD v63 MOS76 0125 F9D7 D0 12 BNE TAPER0 MOS76 0117 F9CD v63 MOS76 0126 F9D9 MOS76 0117 F9CD v63 MOS76 0127 F9D9 MOS76 MOS76 MOS76 MOS76 Acorn macro assembler Page 142 MOS76 C.F.S. - I/O Utilities -> MOS76 MOS76 MOS76 0117 F9CD v63 MOS76 0128 F9D9 AD C6 03 CHKBKN LDA INFO +BKNOLO ;Is expected block ?? MOS76 0117 F9CD v63 MOS76 0129 F9DC C5 B4 CMP BLOKNO MOS76 0117 F9CD v63 MOS76 0130 F9DE D0 07 BNE BLKERR MOS76 0117 F9CD v63 MOS76 0131 F9E0 AD C7 03 LDA INFO +BKNOHI MOS76 0117 F9CD v63 MOS76 0132 F9E3 C5 B5 CMP BLOKNO +&01 MOS76 0117 F9CD v63 MOS76 0133 F9E5 F0 13 BEQ CHEKSM ;No error -> go on MOS76 0117 F9CD v63 MOS76 0134 F9E7 MOS76 0117 F9CD v63 MOS76 0135 F9E7 A0 99 BLKERR LDYIM BLOKER MOS76 0117 F9CD v63 MOS76 0136 F9E9 A9 FA LDAIM /(BLOKER ) MOS76 0117 F9CD v63 MOS76 0137 F9EB MOS76 0117 F9CD v63 MOS76 0138 F9EB 48 TAPER0 PHA ;Store error ptr. MOS76 0133 F9E5 v6C MOS76 0139 F9EC 98 TYA MOS76 0133 F9E5 v6C MOS76 0140 F9ED 48 PHA MOS76 0133 F9E5 v6C MOS76 0141 F9EE 8A TXA ;Store "abort if nesc." flag MOS76 0133 F9E5 v6C MOS76 0142 F9EF 48 PHA MOS76 0133 F9E5 v6C MOS76 0143 F9F0 20 DF F8 JSR PRTHDL ;Print header ON NEW LINE MOS76 0133 F9E5 v6C MOS76 0144 F9F3 68 PLA MOS76 0133 F9E5 v6C MOS76 0145 F9F4 AA TAX MOS76 0133 F9E5 v6C MOS76 0146 F9F5 68 PLA MOS76 0133 F9E5 v6C MOS76 0147 F9F6 A8 TAY MOS76 0133 F9E5 v6C MOS76 0148 F9F7 68 PLA MOS76 0133 F9E5 v6C MOS76 0149 F9F8 D0 14 BNE TAPERR MOS76 0149 F9F8 v6B MOS76 0150 F9FA MOS76 0149 F9F8 v6B MOS76 0151 F9FA 8A CHEKSM TXA MOS76 0149 F9F8 v6B MOS76 0152 F9FB 48 PHA ;Store X over possible IRUPT call MOS76 0149 F9F8 v6B MOS76 0153 F9FC 20 D2 F8 JSR PRTHDR ; Print header info. MOS76 0149 F9F8 v6B MOS76 0154 F9FF MOS76 0149 F9F8 v6B MOS76 0155 F9FF 20 CB FA JSR CHEKLP ;Wait for end of BG job MOS76 0149 F9F8 v6B MOS76 0156 FA02 ;In SFS, CHEKLP reads next SFS block MOS76 0149 F9F8 v6B MOS76 0157 FA02 MOS76 0149 F9F8 v6B MOS76 0158 FA02 ;Note X & Y corrupted by IRUPT, which MOS76 0149 F9F8 v6B MOS76 0159 FA02 ;is only called when SROM system active. MOS76 0149 F9F8 v6B MOS76 0160 FA02 ;Y is restored at ERREXT. MOS76 0149 F9F8 v6B MOS76 0161 FA02 ; MOS76 0149 F9F8 v6B MOS76 0162 FA02 68 PLA MOS76 0149 F9F8 v6B MOS76 0163 FA03 AA TAX ;Restore "abort if nesc." flag MOS76 0149 F9F8 v6B MOS76 0164 FA04 MOS76 0149 F9F8 v6B MOS76 0165 FA04 A5 BE LDA CHKSUM MOS76 0149 F9F8 v6B MOS76 0166 FA06 05 BF ORA CHKSUM +&01 MOS76 0149 F9F8 v6B MOS76 0167 FA08 F0 78 BEQ ERREXX ;No errors, tape ok, exit MOS76 0167 FA08 v07 MOS76 0168 FA0A MOS76 0167 FA08 v07 MOS76 0169 FA0A A0 83 LDYIM DATAER ;Set message ptr. MOS76 0167 FA08 v07 MOS76 0170 FA0C A9 FA LDAIM /(DATAER ) MOS76 0167 FA08 v07 MOS76 0171 FA0E MOS76 0167 FA08 v07 MOS76 0172 FA0E C6 BA TAPERR DEC ERRSW MOS76 0167 FA08 v07 MOS76 0173 FA10 48 PHA ;Store hi byte of error pointer MOS76 0167 FA08 v07 MOS76 0174 FA11 MOS76 0167 FA08 v07 MOS76 0175 FA11 24 EB BIT ESSEMA MOS76 0167 FA08 v07 MOS76 0176 FA13 30 0D BMI ERRABT ;During EXEC/SPOOL can ABORT ONLY ! MOS76 0167 FA08 v07 MOS76 0177 FA15 MOS76 0167 FA08 v07 MOS76 0178 FA15 8A TXA ;If X = 0 => print only, X = $FF abort if nesc. MOS76 0167 FA08 v07 MOS76 0179 FA16 2D 47 02 AND SROMSW ;If not cataloging, and SROM => abort MOS76 0167 FA08 v07 MOS76 0180 FA19 D0 07 BNE ERRABT MOS76 0167 FA08 v07 MOS76 0181 FA1B 8A TXA ;Otherwise, check if "abort on error" option set MOS76 0167 FA08 v07 MOS76 0182 FA1C ;If so, do BRK MOS76 0167 FA08 v07 MOS76 0183 FA1C MOS76 0167 FA08 v07 MOS76 0184 FA1C 29 11 ANDIM ABTBIT MOS76 0167 FA08 v07 MOS76 0185 FA1E 25 BB AND USFLGS MOS76 0167 FA08 v07 MOS76 0186 FA20 F0 10 BEQ PRTERR ;Abort not set => print MOS76 0167 FA08 v07 MOS76 0187 FA22 MOS76 0167 FA08 v07 MOS76 0188 FA22 68 ERRABT PLA MOS76 0167 FA08 v07 MOS76 0189 FA23 85 B9 STA FTPTR +&01 ;Set error pointer MOS76 0167 FA08 v07 MOS76 0190 FA25 84 B8 STY FTPTR MOS76 0167 FA08 v07 MOS76 0191 FA27 20 C5 F6 JSR ECLOSE ;close EXEC file MOS76 0167 FA08 v07 MOS76 0192 FA2A 46 EB LSR ESSEMA ;Switch off critical region MOS76 0167 FA08 v07 MOS76 0193 FA2C 20 DD FA JSR BEEPOF ;Motor off/BEEP MOS76 0167 FA08 v07 MOS76 0194 FA2F 6C B8 00 JMI FTPTR ;Abort = break with error msg. MOS76 0167 FA08 v07 MOS76 0195 FA32 MOS76 0167 FA08 v07 MOS76 0196 FA32 68 PRTERR PLA ;Restore hi byte of pointer MOS76 0167 FA08 v07 MOS76 0197 FA33 MOS76 0167 FA08 v07 MOS76 0198 FA33 ;Now must add ONE to pointer to get past BRK MOS76 0167 FA08 v07 MOS76 0199 FA33 ;at front of message. Note MSGOUT does an INC MOS76 0167 FA08 v07 MOS76 0200 FA33 ;before printing, so don't have to add 2. MOS76 0167 FA08 v07 MOS76 0201 FA33 MOS76 0167 FA08 v07 MOS76 0202 FA33 [ MOS125 = &FF MOS76 0167 FA08 v07 MOS76 0207 FA33 | MOS76 0167 FA08 v07 MOS76 0208 FA33 C0 FF CPYIM &FF MOS76 0167 FA08 v07 MOS76 0209 FA35 C8 INY ;Inc lo byte past BRK instruction MOS76 0167 FA08 v07 MOS76 0210 FA36 69 00 ADCIM &00 MOS76 0167 FA08 v07 MOS76 0211 FA38 ] MOS76 0167 FA08 v07 MOS76 0212 FA38 48 PRTEON PHA ;Set stack for MSGOUT MOS76 0167 FA08 v07 MOS76 0213 FA39 98 TYA MOS76 0167 FA08 v07 MOS76 0214 FA3A 48 PHA MOS76 0167 FA08 v07 MOS76 0215 FA3B ; Print message and enter code MOS76 0167 FA08 v07 MOS76 0216 FA3B ; directly AFTER message MOS76 0167 FA08 v07 MOS76 0217 FA3B ; MOS76 0167 FA08 v07 MOS76 0218 FA3B MSGOUT MOS76 0167 FA08 v07 MOS76 0219 FA3B MOS76 0167 FA08 v07 MOS76 0220 FA3B ;Enter here for messages printed if MSGON MOS76 0167 FA08 v07 MOS76 0221 FA3B ;Note, X must be preserved MOS76 0167 FA08 v07 MOS76 0222 FA3B MOS76 0167 FA08 v07 MOS76 0223 FA3B 20 5B EA JSR MSGON MOS76 0167 FA08 v07 MOS76 0224 FA3E A8 TAY ;Store for STROUT MOS76 0167 FA08 v07 MOS76 0225 FA3F MOS76 0167 FA08 v07 MOS76 0226 FA3F STROUT MOS76 0167 FA08 v07 MOS76 0227 FA3F MOS76 0167 FA08 v07 MOS76 0228 FA3F MOS76 0167 FA08 v07 MOS76 0229 FA3F 68 PLA MOS76 0167 FA08 v07 MOS76 0230 FA40 85 B8 STA FTPTR MOS76 0167 FA08 v07 MOS76 0231 FA42 68 PLA MOS76 0167 FA08 v07 MOS76 0232 FA43 85 B9 STA FTPTR +&01 MOS76 0167 FA08 v07 MOS76 0233 FA45 98 TYA MOS76 0167 FA08 v07 MOS76 0234 FA46 08 PHP ;Z bit => print MOS76 0167 FA08 v07 MOS76 0235 FA47 E6 B8 VSTRLP INC FTPTR MOS76 0167 FA08 v07 MOS76 0236 FA49 D0 02 BNE VSTRL1 MOS76 0167 FA08 v07 MOS76 0237 FA4B E6 B9 INC FTPTR +&01 MOS76 0167 FA08 v07 MOS76 0238 FA4D A0 00 VSTRL1 LDYIM &00 MOS76 0167 FA08 v07 MOS76 0239 FA4F B1 B8 LDAIY FTPTR MOS76 0167 FA08 v07 MOS76 0240 FA51 F0 0A BEQ VSTREX MOS76 0167 FA08 v07 MOS76 0241 FA53 28 PLP MOS76 0167 FA08 v07 MOS76 0242 FA54 08 PHP MOS76 0167 FA08 v07 MOS76 0243 FA55 F0 F0 BEQ VSTRLP ;If Z set => don't print MOS76 0167 FA08 v07 MOS76 0244 FA57 20 E3 FF JSR OSASCI MOS76 0167 FA08 v07 MOS76 0245 FA5A 4C 47 FA JMP VSTRLP MOS76 0167 FA08 v07 MOS76 0246 FA5D 28 VSTREX PLP ;Restore stack MOS76 0167 FA08 v07 MOS76 0247 FA5E E6 B8 INC FTPTR MOS76 0167 FA08 v07 MOS76 0248 FA60 D0 02 BNE VSTREZ MOS76 0167 FA08 v07 MOS76 0249 FA62 E6 B9 INC FTPTR +&01 MOS76 0167 FA08 v07 MOS76 0250 FA64 MOS76 0167 FA08 v07 MOS76 0251 FA64 ;Exit always with Z CLEAR MOS76 0167 FA08 v07 MOS76 0252 FA64 MOS76 MOS76 MOS76 MOS76 Acorn macro assembler Page 143 MOS76 C.F.S. - I/O Utilities -> MOS76 MOS76 MOS76 0167 FA08 v07 MOS76 0253 FA64 6C B8 00 VSTREZ JMI FTPTR MOS76 0167 FA08 v07 MOS76 0254 FA67 MOS76 0167 FA08 v07 MOS76 0255 FA67 MOS76 0167 FA08 v07 MOS76 0256 FA67 CMPFT MOS76 0167 FA08 v07 MOS76 0257 FA67 A2 FF LDXIM &FF MOS76 0167 FA08 v07 MOS76 0258 FA69 CMPFT2 MOS76 0167 FA08 v07 MOS76 0259 FA69 E8 INX MOS76 0167 FA08 v07 MOS76 0260 FA6A CMPFT1 ;match filename, equating cases MOS76 0167 FA08 v07 MOS76 0261 FA6A BD D2 03 LDAAX FILNAM MOS76 0167 FA08 v07 MOS76 0262 FA6D D0 07 BNE CMPFT3 ;[not at end of filename] MOS76 0167 FA08 v07 MOS76 0263 FA6F ; MOS76 0167 FA08 v07 MOS76 0264 FA6F ; at end of filename, either: MOS76 0167 FA08 v07 MOS76 0265 FA6F ; X=0 => match on filename "" (null filename) MOS76 0167 FA08 v07 MOS76 0266 FA6F ; X<>0 => INFO(X)=0 => match, <>0 => no match MOS76 0167 FA08 v07 MOS76 0267 FA6F ; MOS76 0167 FA08 v07 MOS76 0268 FA6F 8A TXA MOS76 0167 FA08 v07 MOS76 0269 FA70 F0 03 BEQ CMPFT0 ;[match on filename "", return EQ status] MOS76 0167 FA08 v07 MOS76 0270 FA72 BD B2 03 LDAAX INFO MOS76 0167 FA08 v07 MOS76 0271 FA75 CMPFT0 ;EQ => match, NE => no match MOS76 0167 FA08 v07 MOS76 0272 FA75 60 RTS MOS76 0167 FA08 v07 MOS76 0273 FA76 MOS76 0167 FA08 v07 MOS76 0274 FA76 CMPFT3 ;not at end of filename MOS76 0167 FA08 v07 MOS76 0275 FA76 20 5B E5 JSR CAPS MOS76 0167 FA08 v07 MOS76 0276 FA79 5D B2 03 EORAX INFO MOS76 0167 FA08 v07 MOS76 0277 FA7C B0 02 BCS NALPHA MOS76 0167 FA08 v07 MOS76 0278 FA7E ; filename character is a letter MOS76 0167 FA08 v07 MOS76 0279 FA7E 29 DF ANDIM &DF ;equate cases MOS76 0167 FA08 v07 MOS76 0280 FA80 NALPHA MOS76 0167 FA08 v07 MOS76 0281 FA80 F0 E7 BEQ CMPFT2 MOS76 0167 FA08 v07 MOS76 0282 FA82 ; filenames not equal MOS76 0167 FA08 v07 MOS76 0283 FA82 ; return NE status MOS76 0167 FA08 v07 MOS76 0284 FA82 ERREXX ;Called from around CSON1 MOS76 0167 FA08 v07 MOS76 0285 FA82 60 RTS -- MOS76 0286 FA83 -- MOS76 0287 FA83 -- MOS76 0288 FA83 -- MOS76 0289 FA83 00 DATAER BRK -- MOS76 0290 FA84 D8 = CFSERJ -- MOS76 0291 FA85 0D 44 61 = MCR,"Data?",0 -- MOS76 0292 FA8C -- MOS76 0293 FA8C D0 15 BNE REWIND ;Z always CLEAR after MSGOUT MOS76 0293 FA8C v6A MOS76 0294 FA8E 00 FILEER BRK MOS76 0293 FA8C v6A MOS76 0295 FA8F DB = CFSERF MOS76 0293 FA8C v6A MOS76 0296 FA90 0D 46 69 = MCR,"File?",0 MOS76 0293 FA8C v6A MOS76 0297 FA97 MOS76 0293 FA8C v6A MOS76 0298 FA97 D0 0A BNE REWIND ;Z always CLEAR after MSGOUT MOS76 0293 FA8C v6A MOS76 0299 FA99 00 BLOKER BRK MOS76 0293 FA8C v6A MOS76 0300 FA9A DA = CFSERH MOS76 0293 FA8C v6A MOS76 0301 FA9B 0D 42 6C = MCR,"Block?",0 MOS76 0293 FA8C v6A MOS76 0302 FAA3 MOS76 0293 FA8C v6A MOS76 0303 FAA3 MOS76 0293 FA8C v6A MOS76 0304 FAA3 A5 BA REWIND LDA ERRSW -- MOS76 0305 FAA5 F0 21 BEQ ERROEX ;If no error, leave MOS76 0305 FAA5 v5E MOS76 0306 FAA7 8A TXA MOS76 0305 FAA5 v5E MOS76 0307 FAA8 F0 1E BEQ ERROEX ;If only printing, no retry MOS76 0305 FAA5 v5E MOS76 0308 FAAA A9 22 LDAIM RETBIT ;Otherwise, see if RETRY set MOS76 0305 FAA5 v5E MOS76 0309 FAAC 24 BB BIT USFLGS MOS76 0305 FAA5 v5E MOS76 0310 FAAE F0 18 BEQ ERROEX MOS76 0305 FAA5 v5E MOS76 0311 FAB0 20 3B FB JSR CRESET MOS76 0305 FAA5 v5E MOS76 0312 FAB3 A8 TAY ;Assume A is non-zero from RESET MOS76 0305 FAA5 v5E MOS76 0313 FAB4 20 3F FA JSR STROUT MOS76 0305 FAA5 v5E MOS76 0314 FAB7 0D 07 52 = MCR,BEL,"Rewind tape",MCR,MCR,0 MOS76 0305 FAA5 v5E MOS76 0315 FAC7 MOS76 0305 FAA5 v5E MOS76 0316 FAC7 MOS76 0305 FAA5 v5E MOS76 0317 FAC7 ;Note NZ set by VSTRIN here MOS76 0305 FAA5 v5E MOS76 0318 FAC7 60 CSON1 RTS MOS76 0305 FAA5 v5E MOS76 0319 FAC8 MOS76 0305 FAA5 v5E MOS76 0320 FAC8 MOS76 0305 FAA5 v5E MOS76 0321 FAC8 20 E9 F2 ERROEX JSR NOOLIN ;New line if msgs on MOS76 0327 FACD ^78 MOS76 0322 FACB MOS76 0327 FACD ^78 MOS76 0323 FACB ;Wait for BG job to finish since if IGNORE set, must MOS76 0327 FACD ^78 MOS76 0324 FACB ;allow LOADs etc. to complete. MOS76 0327 FACD ^78 MOS76 0325 FACB MOS76 0327 FACD ^78 MOS76 0326 FACB A5 C2 CHEKLP LDA ITYPE MOS76 0335 FAD5 ^74 MOS76 0327 FACD F0 F8 BEQ CSON1 ;If BG job finished exit with EQ status MOS76 0335 FAD5 ^74 MOS76 0328 FACF MOS76 0335 FAD5 ^74 MOS76 0329 FACF ;Note: loop must check ITYPE first, coz may be no MOS76 0335 FAD5 ^74 MOS76 0330 FACF ;BG job in the case of zero length file. Therefore MOS76 0335 FAD5 ^74 MOS76 0331 FACF ;don't want to read next SROM byte. MOS76 0335 FAD5 ^74 MOS76 0332 FACF MOS76 0335 FAD5 ^74 MOS76 0333 FACF 20 8B F9 JSR ESCAPE MOS76 0335 FAD5 ^74 MOS76 0334 FAD2 AD 47 02 LDA SROMSW MOS76 0335 FAD5 ^74 MOS76 0335 FAD5 F0 F4 BEQ CHEKLP ;If no speech, wait for end -- MOS76 0336 FAD7 ;GoMMC tape patch has FAE0 NOP;NOP -- MOS76 0337 FAD7 20 C2 F5 JSR IRUPT ;Otherwise, get next byte -- MOS76 0338 FADA 4C CB FA JMP CHEKLP ;And loop -- MOS76 0339 FADD -- MOS76 0340 FADD -- MOS76 0341 FADD -- MOS76 0342 FADD ;CHIP CONTROL -- MOS76 0343 FADD -- MOS76 0344 FADD 20 5B EA BEEPOF JSR MSGON -- MOS76 0345 FAE0 F0 05 BEQ CASMOF MOS76 0345 FAE0 v7A MOS76 0346 FAE2 A9 07 LDAIM &07 MOS76 0345 FAE0 v7A MOS76 0347 FAE4 20 EE FF JSR OSWRCH ;Cannot use MSGOUT, coz called from inside it MOS76 0345 FAE0 v7A MOS76 0348 FAE7 A9 80 CASMOF LDAIM TUBERL ;Tube release number -- MOS76 0349 FAE9 20 B0 FB JSR TBINIT ;Release tube -- MOS76 0350 FAEC -- MOS76 0351 FAEC ;NOTE - TBINIT checks BKADDR. However, either at this point -- MOS76 0352 FAEC ;the tube has been claimed, in which case BKADDR is still a -- MOS76 0353 FAEC ;tube address and the release will go through; or the tube -- MOS76 0354 FAEC ;has not been claimed, in which case it don't matter if the -- MOS76 0355 FAEC ;release don't happen. NOTE also that a claim is done in -- MOS76 0356 FAEC ;TBINIT before the release, so that spurious claims may -- MOS76 0357 FAEC ;result depending on the values in BKADDR. These will, however -- MOS76 0358 FAEC ;be immediately released again. -- MOS76 0359 FAEC -- MOS76 0360 FAEC A2 00 LDXIM &00 -- MOS76 0361 FAEE 20 8C FB JSR CMOTOR ;Motor off: drive set in MOTOR. -- MOS76 0362 FAF1 ; -- MOS76 0363 FAF1 RELEAS -- MOS76 0364 FAF1 ; called by CFS on exit from any cassette operation -- MOS76 0365 FAF1 ; N.B. RS423 might not have been claimed beforehand -- MOS76 0366 FAF1 ; -- MOS76 0367 FAF1 08 PHP -- MOS76 0368 FAF2 78 SEI ;must disable interrupts -- MOS76 0369 FAF3 ; -- MOS76 0370 FAF3 ; restore MOS 6850 and serproc byte -- MOS76 0371 FAF3 ; -- MOS76 0372 FAF3 AD 82 02 LDA SPREGA -- MOS76 0373 FAF6 8D 10 FE STA SERPRC MOS76 MOS76 MOS76 MOS76 Acorn macro assembler Page 144 MOS76 C.F.S. - I/O Utilities -> MOS76 MOS76 -- MOS76 0374 FAF9 ; -- MOS76 0375 FAF9 A9 00 LDAIM ZERO -- MOS76 0376 FAFB 85 EA STA RSTUT -- MOS76 0377 FAFD F0 01 BEQ RELX ;[ALWAYS jump] MOS76 0377 FAFD v7E MOS76 0378 FAFF ; MOS76 0377 FAFD v7E MOS76 0379 FAFF MC6850 MOS76 0377 FAFD v7E MOS76 0380 FAFF 08 PHP MOS76 0377 FAFD v7E MOS76 0381 FB00 ; MOS76 0377 FAFD v7E MOS76 0382 FB00 RELX MOS76 0377 FAFD v7E MOS76 0383 FB00 ; CORRUPTS A MOS76 0377 FAFD v7E MOS76 0384 FB00 ; setup MC6850 MOS76 0377 FAFD v7E MOS76 0385 FB00 ; disable Rx/Tx interrupts MOS76 0377 FAFD v7E MOS76 0386 FB00 ; divide by 64, 7 data bits + 1 stop bit, even parity MOS76 0377 FAFD v7E MOS76 0387 FB00 ; or 8 bits, one stop bit, no parity!! MOS76 0377 FAFD v7E MOS76 0388 FB00 ; MOS76 0377 FAFD v7E MOS76 0389 FB00 20 3B FB JSR CRESET ;master reset -- MOS76 0390 FB03 ; -- MOS76 0391 FB03 ; reset data format bits -- MOS76 0392 FB03 ; -- MOS76 0393 FB03 AD 50 02 LDA RSCTFL -- MOS76 0394 FB06 ; -- MOS76 0395 FB06 4C 25 E2 JMP STARSC ;share code with 'RS423' -- MOS76 0396 FB09 -- MOS76 0397 FB09 -- MOS76 0398 FB09 RSWT1 -- MOS76 0399 FB09 28 PLP MOS76 0438 FB30 ^57 MOS76 0400 FB0A 24 FF BIT ESCFLG MOS76 0438 FB30 ^57 MOS76 0401 FB0C 10 18 BPL CLAIM ;[no escape, ALWAYS jump] MOS76 0438 FB30 ^57 MOS76 0402 FB0E ; MOS76 0438 FB30 ^57 MOS76 0403 FB0E ; escape condition MOS76 0438 FB30 ^57 MOS76 0404 FB0E ; MOS76 0438 FB30 ^57 MOS76 0405 FB0E 60 RTS MOS76 0438 FB30 ^57 MOS76 0406 FB0F MOS76 0438 FB30 ^57 MOS76 0407 FB0F MOS76 0438 FB30 ^57 MOS76 0408 FB0F A5 E3 SETSDF LDA OPTS ;Set options for sequential access MOS76 0438 FB30 ^57 MOS76 0409 FB11 0A ASLA ;=> bottom nybble of OPTS MOS76 0438 FB30 ^57 MOS76 0410 FB12 0A ASLA MOS76 0438 FB30 ^57 MOS76 0411 FB13 0A ASLA MOS76 0438 FB30 ^57 MOS76 0412 FB14 0A ASLA MOS76 0438 FB30 ^57 MOS76 0413 FB15 85 BB STA USFLGS MOS76 0438 FB30 ^57 MOS76 0414 FB17 AD D1 03 LDA SEQGAP ;Set (variable) PUTBYTE gap time MOS76 0438 FB30 ^57 MOS76 0415 FB1A D0 08 BNE GAPOUT ;[ALWAYS JUMP] MOS76 0438 FB30 ^57 MOS76 0416 FB1C ; MOS76 0438 FB30 ^57 MOS76 0417 FB1C A5 E3 SETDEF LDA OPTS MOS76 0438 FB30 ^57 MOS76 0418 FB1E 29 F0 ANDIM &F0 ;Chop out seq. opts MOS76 0438 FB30 ^57 MOS76 0419 FB20 85 BB STA USFLGS ;Set options for load/save operation MOS76 0438 FB30 ^57 MOS76 0420 FB22 [ GLYN =0 ;If special system for glyn MOS76 0438 FB30 ^57 MOS76 0422 FB22 | MOS76 0438 FB30 ^57 MOS76 0423 FB22 A9 06 LDAIM GAP ;Set SAVE gap -> unchangeable MOS76 0438 FB30 ^57 MOS76 0424 FB24 ] MOS76 0438 FB30 ^57 MOS76 0425 FB24 85 C7 GAPOUT STA GAPTIM MOS76 0438 FB30 ^57 MOS76 0426 FB26 ; MOS76 0438 FB30 ^57 MOS76 0427 FB26 ; fall thru into CLAIM MOS76 0438 FB30 ^57 MOS76 0428 FB26 ; MOS76 0438 FB30 ^57 MOS76 0429 FB26 CLAIM MOS76 0438 FB30 ^57 MOS76 0430 FB26 ; Claim RS423 h/w interface MOS76 0438 FB30 ^57 MOS76 0431 FB26 ; Called by CFS MOS76 0438 FB30 ^57 MOS76 0432 FB26 58 CLI MOS76 0438 FB30 ^57 MOS76 0433 FB27 08 PHP MOS76 0438 FB30 ^57 MOS76 0434 FB28 78 SEI MOS76 0438 FB30 ^57 MOS76 0435 FB29 2C 4F 02 BIT RSFLAG MOS76 0438 FB30 ^57 MOS76 0436 FB2C 10 DB BPL RSWT1 ;[RS423 busy] MOS76 0438 FB30 ^57 MOS76 0437 FB2E A5 EA LDA RSTUT MOS76 0438 FB30 ^57 MOS76 0438 FB30 30 D7 BMI RSWT1 ;[RS423 dormant, but still timing out] -- MOS76 0439 FB32 ; RS423 dormant and timed out OR claimed => RS423 available -- MOS76 0440 FB32 ; RSTUT>=0 -- MOS76 0441 FB32 ; headline: 'CFS Claims RS423' -- MOS76 0442 FB32 A9 01 LDAIM &01 ;allow for many call claims -- MOS76 0443 FB34 85 EA STA RSTUT ;RSTUT := 1 -- MOS76 0444 FB36 -- MOS76 0445 FB36 [ &00=0 -- MOS76 0446 FB36 20 3B FB JSR CRESET -- MOS76 0447 FB39 28 PLP -- MOS76 0448 FB3A 60 RTS -- MOS76 0449 FB3B | -- MOS76 0452 FB3B ] -- MOS76 0453 FB3B -- MOS76 0454 FB3B -- MOS76 0455 FB3B A9 03 CRESET LDAIM &03 -- MOS76 0456 FB3D D0 1B BNE SETCHP MOS76 0456 FB3D v64 MOS76 0457 FB3F MOS76 0456 FB3D v64 MOS76 0458 FB3F MOS76 0456 FB3D v64 MOS76 0459 FB3F TXINIT MOS76 0456 FB3D v64 MOS76 0460 FB3F A9 30 LDAIM TXSTAT MOS76 0456 FB3D v64 MOS76 0461 FB41 85 CA STA TXFLAG MOS76 0456 FB3D v64 MOS76 0462 FB43 D0 13 BNE CHPINT MOS76 0456 FB3D v64 MOS76 0463 FB45 MOS76 0456 FB3D v64 MOS76 0464 FB45 A9 05 RXINIT LDAIM SEROFF MOS76 0456 FB3D v64 MOS76 0465 FB47 MOS76 0456 FB3D v64 MOS76 0466 FB47 ;Switch motor off without going through OS MOS76 0456 FB3D v64 MOS76 0467 FB47 ;coz don't want user to be bothered with each MOS76 0456 FB3D v64 MOS76 0468 FB47 ;motor blip MOS76 0456 FB3D v64 MOS76 0469 FB47 MOS76 0456 FB3D v64 MOS76 0470 FB47 8D 10 FE STA SERPRC MOS76 0456 FB3D v64 MOS76 0471 FB4A MOS76 0456 FB3D v64 MOS76 0472 FB4A A2 FF LDXIM &FF ;250 * 2.5 usecs = 1 millisec MOS76 0456 FB3D v64 MOS76 0473 FB4C CA RXINL1 DEX MOS76 0456 FB3D v64 MOS76 0474 FB4D D0 FD BNE RXINL1 MOS76 0456 FB3D v64 MOS76 0475 FB4F 86 CA STX TXFLAG MOS76 0456 FB3D v64 MOS76 0476 FB51 MOS76 0456 FB3D v64 MOS76 0477 FB51 A9 85 LDAIM SERON MOS76 0456 FB3D v64 MOS76 0478 FB53 8D 10 FE STA SERPRC ;Motor on again MOS76 0456 FB3D v64 MOS76 0479 FB56 MOS76 0456 FB3D v64 MOS76 0480 FB56 A9 D0 LDAIM RXSTAT MOS76 0456 FB3D v64 MOS76 0481 FB58 05 C6 CHPINT ORA SPEED ;Put in bottom bit, set in INIT from MOS MOS76 0456 FB3D v64 MOS76 0482 FB5A 8D 08 FE SETCHP STA STATUS -- MOS76 0483 FB5D 60 RTS -- MOS76 0484 FB5E -- MOS76 0485 FB5E -- MOS76 0486 FB5E AE C6 03 NXTBLK LDX INFO +BKNOLO -- MOS76 0487 FB61 AC C7 03 LDY INFO +BKNOHI -- MOS76 0488 FB64 E8 INX -- MOS76 0489 FB65 86 B4 STX BLOKNO -- MOS76 0490 FB67 D0 01 BNE NXTBLX MOS76 0490 FB67 v7E MOS76 0491 FB69 C8 INY MOS76 0490 FB67 v7E MOS76 0492 FB6A 84 B5 NXTBLX STY BLOKNO +&01 -- MOS76 0493 FB6C 60 RTS -- MOS76 0494 FB6D -- MOS76 0495 FB6D A0 00 SETJOB LDYIM &00 -- MOS76 0496 FB6F 84 C0 STY IFLAG -- MOS76 0497 FB71 [ MOS125 = &FF MOS76 MOS76 MOS76 MOS76 Acorn macro assembler Page 145 MOS76 C.F.S. - I/O Utilities -> MOS76 MOS76 -- MOS76 0499 FB71 | -- MOS76 0500 FB71 A0 00 SETJB1 LDYIM &00 -- MOS76 0501 FB73 84 BE STY CHKSUM -- MOS76 0502 FB75 ] -- MOS76 0503 FB75 84 BF STY CHKSUM +&01 -- MOS76 0504 FB77 60 RTS -- MOS76 0505 FB78 -- MOS76 0506 FB78 -- MOS76 0507 FB78 A0 FF MOVFN LDYIM &FF -- MOS76 0508 FB7A C8 MOVFNL INY MOS76 0512 FB82 ^76 MOS76 0509 FB7B E8 INX MOS76 0512 FB82 ^76 MOS76 0510 FB7C BD 00 03 LDAAX VARPGE MOS76 0512 FB82 ^76 MOS76 0511 FB7F 99 D2 03 STAAY FILNAM MOS76 0512 FB82 ^76 MOS76 0512 FB82 D0 F6 BNE MOVFNL -- MOS76 0513 FB84 60 RTS -- MOS76 0514 FB85 -- MOS76 0515 FB85 -- MOS76 0516 FB85 A0 00 MOTONW LDYIM WRITFX ;Motor on for output -- MOS76 0517 FB87 58 MOTON CLI ;Ensure can talk to tape -- MOS76 0518 FB88 A2 01 LDXIM &01 ;Motor on -- MOS76 0519 FB8A 84 C3 STY CURDRV ;Store current drive -- MOS76 0520 FB8C A9 89 CMOTOR LDAIM FXMOTR ;=> motor function -- MOS76 0521 FB8E -- MOS76 0522 FB8E ;Load drive number into Y, so switching motor -- MOS76 0523 FB8E ;off is always done with the drive most recently -- MOS76 0524 FB8E ;switched on (seems logical). -- MOS76 0525 FB8E -- MOS76 0526 FB8E A4 C3 LDY CURDRV -- MOS76 0527 FB90 4C F4 FF JMP OSBYTE -- MOS76 0528 FB93 -- MOS76 0529 FB93 CHKHND -- MOS76 0530 FB93 -- MOS76 0531 FB93 ;Check handle in Y is open -- MOS76 0532 FB93 ;and corresponds to mask in A -- MOS76 0533 FB93 -- MOS76 0534 FB93 [ MOS125 = &FF -- MOS76 0548 FB93 | -- MOS76 0549 FB93 ;squash and bugfix: Y=0 not accepted by RFS when OUTHND open in CFS -- MOS76 0550 FB93 25 E2 AND CFSTAT -- MOS76 0551 FB95 C0 02 CPYIM OUTHND -- MOS76 0552 FB97 D0 02 BNE CHKHN1 MOS76 0552 FB97 v7D MOS76 0553 FB99 4A LSRA MOS76 0552 FB97 v7D MOS76 0554 FB9A 88 DEY MOS76 0552 FB97 v7D MOS76 0555 FB9B CHKHN1 MOS76 0552 FB97 v7D MOS76 0556 FB9B 88 DEY -- MOS76 0557 FB9C CC 47 02 CPY SROMSW -- MOS76 0558 FB9F D0 03 BNE HNDERR MOS76 0558 FB9F v7C MOS76 0559 FBA1 4A LSRA MOS76 0558 FB9F v7C MOS76 0560 FBA2 B0 4D BCS CHKHXX MOS76 0560 FBA2 v32 MOS76 0561 FBA4 ] MOS76 0560 FBA2 v32 MOS76 0562 FBA4 MOS76 0560 FBA2 v32 MOS76 0563 FBA4 MOS76 0560 FBA2 v32 MOS76 0564 FBA4 00 HNDERR BRK MOS76 0560 FBA2 v32 MOS76 0565 FBA5 DE = CFSERB MOS76 0560 FBA2 v32 MOS76 0566 FBA6 43 68 61 = "Channel",0 MOS76 0560 FBA2 v32 MOS76 0567 FBAE MOS76 0560 FBA2 v32 MOS76 0568 FBAE MOS76 0560 FBA2 v32 MOS76 0569 FBAE MOS76 0560 FBA2 v32 MOS76 0570 FBAE TWINIT MOS76 0560 FBA2 v32 MOS76 0571 FBAE A9 01 LDAIM TUBEW ;Write init. for tube MOS76 0560 FBA2 v32 MOS76 0572 FBB0 TBINIT MOS76 0560 FBA2 v32 MOS76 0573 FBB0 ;Check the address at BKADDR is accross tube MOS76 0560 FBA2 v32 MOS76 0574 FBB0 ;and that tube is present. If so, claim tube, and call MOS76 0560 FBA2 v32 MOS76 0575 FBB0 ;address routine with value origionally in A on entry. MOS76 0560 FBA2 v32 MOS76 0576 FBB0 MOS76 0560 FBA2 v32 MOS76 0577 FBB0 20 C6 FB JSR TUBCHK ;Check address + tube present. MOS76 0560 FBA2 v32 MOS76 0578 FBB3 F0 3C BEQ TINIT0 ;Don't tube. (NOTE TAX done in TUBCHK) MOS76 0560 FBA2 v32 MOS76 0579 FBB5 8A TXA ;Restore tube reason code MOS76 0560 FBA2 v32 MOS76 0580 FBB6 A2 B0 LDXIM BKADDR MOS76 0560 FBA2 v32 MOS76 0581 FBB8 A0 00 LDYIM /(BKADDR ) ;Address for tube routine MOS76 0560 FBA2 v32 MOS76 0582 FBBA 48 TBINT1 PHA ;Entry from RUN with non-BKADDR address MOS76 0560 FBA2 v32 MOS76 0583 FBBB A9 C0 LDAIM TUBECL ;"Claim" reason code MOS76 0560 FBA2 v32 MOS76 0584 FBBD 20 06 04 TUBELP JSR TBADDR ;Attempt claim MOS76 0560 FBA2 v32 MOS76 0585 FBC0 90 FB BCC TUBELP ;Continue to try and claim MOS76 0560 FBA2 v32 MOS76 0586 FBC2 68 PLA ;Restore address reason code MOS76 0560 FBA2 v32 MOS76 0587 FBC3 4C 06 04 JMP TBADDR MOS76 0560 FBA2 v32 MOS76 0588 FBC6 MOS76 0560 FBA2 v32 MOS76 0589 FBC6 MOS76 0560 FBA2 v32 MOS76 0590 FBC6 MOS76 0560 FBA2 v32 MOS76 0591 FBC6 AA TUBCHK TAX ;Store A MOS76 0560 FBA2 v32 MOS76 0592 FBC7 A5 B2 LDA BKADDR +&02 MOS76 0560 FBA2 v32 MOS76 0593 FBC9 25 B3 AND BKADDR +&03 MOS76 0560 FBA2 v32 MOS76 0594 FBCB C9 FF CMPIM &FF ;If $FF, address is IO proc., so exit MOS76 0560 FBA2 v32 MOS76 0595 FBCD F0 05 BEQ TUBCHX MOS76 0560 FBA2 v32 MOS76 0596 FBCF AD 7A 02 LDA TUBE MOS76 0560 FBA2 v32 MOS76 0597 FBD2 29 80 ANDIM &80 ;Returns NZ if tube present, EQ if not MOS76 0560 FBA2 v32 MOS76 0598 FBD4 60 TUBCHX RTS MOS76 0560 FBA2 v32 MOS76 0599 FBD5 MOS76 0560 FBA2 v32 MOS76 0600 FBD5 MOS76 0560 FBA2 v32 MOS76 0601 FBD5 MOS76 0560 FBA2 v32 MOS76 0602 FBD5 BUGFIX MOS76 0560 FBA2 v32 MOS76 0603 FBD5 MOS76 0560 FBA2 v32 MOS76 0604 FBD5 ;When the 6850 counter divide bits are reset, it MOS76 0560 FBA2 v32 MOS76 0605 FBD5 ;is possible for the SERPROC to get out of synch. MOS76 0560 FBA2 v32 MOS76 0606 FBD5 ;for a few bits. This has the effect of corrupting MOS76 0560 FBA2 v32 MOS76 0607 FBD5 ;the first character of the first block of a SAVE, MOS76 0560 FBA2 v32 MOS76 0608 FBD5 ;or the first character of ANY block during sequential MOS76 0560 FBA2 v32 MOS76 0609 FBD5 ;access (since the 6850 is reset for every block MOS76 0560 FBA2 v32 MOS76 0610 FBD5 ;during putbytes). MOS76 0560 FBA2 v32 MOS76 0611 FBD5 ; The cure is to write a dummy byte to tape at the MOS76 0560 FBA2 v32 MOS76 0612 FBD5 ;start of a SAVE, and at the start of every block MOS76 0560 FBA2 v32 MOS76 0613 FBD5 ;during putbytes. This must be done by polling, MOS76 0560 FBA2 v32 MOS76 0614 FBD5 ;since there must be a period of high-tone after MOS76 0560 FBA2 v32 MOS76 0615 FBD5 ;the dummy byte, which is difficult to accomplish MOS76 0560 FBA2 v32 MOS76 0616 FBD5 ;if the 6850 is interrupting all the time. MOS76 0560 FBA2 v32 MOS76 0617 FBD5 ; BUGFIX is thus called after the SERPROC is set MOS76 0560 FBA2 v32 MOS76 0618 FBD5 ;and before the 6850 is set to interrupt during MOS76 0560 FBA2 v32 MOS76 0619 FBD5 ;a block write operation. MOS76 0560 FBA2 v32 MOS76 0620 FBD5 MOS76 0560 FBA2 v32 MOS76 0621 FBD5 A9 85 LDAIM SERON MOS76 0560 FBA2 v32 MOS76 0622 FBD7 8D 10 FE STA SERPRC ;Set SERPROC on MOS76 0560 FBA2 v32 MOS76 0623 FBDA 20 3B FB JSR CRESET ;Reset 6850 to be on safe side MOS76 0560 FBA2 v32 MOS76 0624 FBDD A9 10 LDAIM &10 MOS76 0560 FBA2 v32 MOS76 0625 FBDF 20 58 FB JSR CHPINT ;Set 6850 at appropriate clock rate MOS76 0560 FBA2 v32 MOS76 0626 FBE2 MOS76 0560 FBA2 v32 MOS76 0627 FBE2 20 8B F9 BUGLP JSR ESCAPE MOS76 0560 FBA2 v32 MOS76 0628 FBE5 AD 08 FE LDA STATUS MOS76 0560 FBA2 v32 MOS76 0629 FBE8 29 02 ANDIM &02 ;Ready to TX ? MOS76 0560 FBA2 v32 MOS76 0630 FBEA F0 F6 BEQ BUGLP ;Nope -> loop MOS76 0560 FBA2 v32 MOS76 0631 FBEC A9 AA LDAIM &AA MOS76 0560 FBA2 v32 MOS76 0632 FBEE 8D 09 FE STA PORT ;Shove out the dummy byte MOS76 MOS76 MOS76 MOS76 Acorn macro assembler Page 146 MOS76 C.F.S. - I/O Utilities -> MOS76 MOS76 MOS76 0560 FBA2 v32 MOS76 0633 FBF1 CHKHXX MOS76 0560 FBA2 v32 MOS76 0634 FBF1 TINIT0 MOS76 0560 FBA2 v32 MOS76 0635 FBF1 60 RTS -- MOS76 0636 FBF2 -- MOS76 0637 FBF2 [ MOS125 = &FF -- MOS76 0638 FBF2 | -- MOS76 0639 FBF2 ;FSC jump table moved to end of main section. -- MOS76 0640 FBF2 ;This displaces the free space into the middle -- MOS76 0641 FBF2 ;of the ROM where it can be used for any purpose -- MOS76 0642 FBF2 ;(an opcode or branch address at &FBFF would cause -- MOS76 0643 FBF2 ;a dummy read cycle in FRED.) -- MOS76 0644 FBF2 -- MOS76 0645 FBF2 JMPTAB -- MOS76 0646 FBF2 96 = CFSOPT-&01 -- MOS76 0647 FBF3 52 = CFSEOF-&01 -- MOS76 0648 FBF4 F0 = RUN-&01 ;"*." -- MOS76 0649 FBF5 88 = MBDCMD-&01 ;"*" = Bad command -- MOS76 0650 FBF6 F0 = RUN-&01 ;"*RUN " -- MOS76 0651 FBF7 2F = CAT-&01 -- MOS76 0652 FBF8 04 = SHUTES-&01 ;die -- MOS76 0653 FBF9 0007 NOTAB * .-JMPTAB -- MOS76 0654 FBF9 F5 = /(CFSOPT-&01) -- MOS76 0655 FBFA F6 = /(CFSEOF-&01) -- MOS76 0656 FBFB F2 = /(RUN-&01) -- MOS76 0657 FBFC E3 = /(MBDCMD-&01) -- MOS76 0658 FBFD F2 = /(RUN-&01) -- MOS76 0659 FBFE F3 = /(CAT-&01) -- MOS76 0660 FBFF E3 = /(SHUTES-&01) -- MOS76 0661 FC00 -- MOS76 0662 FC00 ;MOS 1.25: Adjust padding in MOS38 to hit &FC00 here -- MOS76 0663 FC00 ] -- MOS76 0664 FC00 -- MOS76 0665 FC00 END -- MOS76 0666 FC00 -- MOS76 0667 FC00 [ $Tutu -- MOS76 0669 FC00 ] -- MOS76 0670 FC00 -- MOS76 0671 FC00 ; pad with zero bytes to ensure ROM CRCs consistent -- MOS76 0672 FC00 00 00 00 % &100 -- MOS76 0673 FD00 -- MOS76 0674 FD00 [ . > &FC00+&100 -- MOS76 0676 FD00 ] -- MOS76 0677 FD00 -- MOS76 0678 FD00 < 1 -- MOS76 0679 FD00 -- MOS76 0680 FD00 LNK MOS99 -- MOS99 0001 FD00 ; MOS99 -- MOS99 0002 FD00 TTL MOS99 Operating system ROM entry points and hardware vectors -- MOS99 0003 FD00 OPT MOS99 MOS99 MOS99 MOS99 MOS99 Acorn macro assembler Page 147 MOS99 MOS99 Operating system ROM entry points and hardware vectors MOS99 -- MOS99 0004 FD00 -- MOS99 0005 FD00 ;(c) 1981 ACORN Computers Limited -- MOS99 0006 FD00 ;BBC Microcomputer Machine Operating System (MOS) -- MOS99 0007 FD00 -- MOS99 0008 FD00 ;Change record: -- MOS99 0009 FD00 -- MOS99 0010 FD00 ;Author(s): -- MOS99 0011 FD00 ;PB Paul Bond -- MOS99 0012 FD00 -- MOS99 0013 FD00 ORG &FC00 -- MOS99 0014 FC00 -- MOS99 0015 FC00 28 43 29 = "(C) 1981 Acorn Computers Ltd." -- MOS99 0016 FC1D 54 68 61 = "Thanks are due to the following contributors to the development of the BBC Computer " -- MOS99 0017 FC71 28 61 6D = "(among others too numerous to mention):- " -- MOS99 0018 FC9A 44 61 76 = "David Allen," -- MOS99 0019 FCA6 42 6F 62 = "Bob Austin," -- MOS99 0020 FCB1 52 61 6D = "Ram Banerjee," -- MOS99 0021 FCBE 50 61 75 = "Paul Bond," -- MOS99 0022 FCC8 41 6C 6C = "Allen Boothroyd," -- MOS99 0023 FCD8 43 61 6D = "Cambridge," -- MOS99 0024 FCE2 43 6C 65 = "Cleartone," -- MOS99 0025 FCEC 4A 6F 68 = "John Coll," -- MOS99 0026 FCF6 4A 6F 68 = "John Cox," -- MOS99 0027 FCFF 41 6E 64 = "Andy Cripps," -- MOS99 0028 FD0B 43 68 72 = "Chris Curry," -- MOS99 0029 FD17 36 35 30 = "6502 designers," -- MOS99 0030 FD26 4A 65 72 = "Jeremy Dion," -- MOS99 0031 FD32 54 69 6D = "Tim Dobson," -- MOS99 0032 FD3D 4A 6F 65 = "Joe Dunn," -- MOS99 0033 FD46 50 61 75 = "Paul Farrell," -- MOS99 0034 FD53 46 65 72 = "Ferranti," -- MOS99 0035 FD5C 53 74 65 = "Steve Furber," -- MOS99 0036 FD69 4A 6F 6E = "Jon Gibbons," -- MOS99 0037 FD75 41 6E 64 = "Andrew Gordon," -- MOS99 0038 FD83 4C 61 77 = "Lawrence Hardwick," -- MOS99 0039 FD95 44 79 6C = "Dylan Harris," -- MOS99 0040 FDA2 48 65 72 = "Hermann Hauser," -- MOS99 0041 FDB1 48 69 74 = "Hitachi," -- MOS99 0042 FDB9 41 6E 64 = "Andy Hopper," -- MOS99 0043 FDC5 49 43 4C = "ICL," -- MOS99 0044 FDC9 4D 61 72 = "Martin Jackson," -- MOS99 0045 FDD8 42 72 69 = "Brian Jones," -- MOS99 0046 FDE4 43 68 72 = "Chris Jordan," -- MOS99 0047 FDF1 44 61 76 = "David King," -- MOS99 0048 FDFC 44 61 76 = "David Kitson," -- MOS99 0049 FE09 50 61 75 = "Paul Kriwaczek," -- MOS99 0050 FE18 43 6F 6D = "Computer Laboratory," -- MOS99 0051 FE2C 50 65 74 = "Peter Miller," -- MOS99 0052 FE39 41 72 74 = "Arthur Norman," -- MOS99 0053 FE47 47 6C 79 = "Glyn Phillips," -- MOS99 0054 FE55 4D 69 6B = "Mike Prees," -- MOS99 0055 FE60 4A 6F 68 = "John Radcliffe," -- MOS99 0056 FE6F 57 69 6C = "Wilberforce Road," -- MOS99 0057 FE80 50 65 74 = "Peter Robinson," -- MOS99 0058 FE8F 52 69 63 = "Richard Russell," -- MOS99 0059 FE9F 4B 69 6D = "Kim Spence-Jones," -- MOS99 0060 FEB0 47 72 61 = "Graham Tebby," -- MOS99 0061 FEBD 4A 6F 6E = "Jon Thackray," -- MOS99 0062 FECA 43 68 72 = "Chris Turner," -- MOS99 0063 FED7 41 64 72 = "Adrian Warner," -- MOS99 0064 FEE5 52 6F 67 = "Roger Wilson," -- MOS99 0065 FEF2 41 6C 61 = "Alan Wright." -- MOS99 0066 FEFE ; -- MOS99 0067 FEFE ; test ROM indirection -- MOS99 0068 FEFE 66 = MRESET -- MOS99 0069 FEFF D9 = /(MRESET ) -- MOS99 0070 FF00 -- MOS99 0071 FF00 ; ORG $FF00 -- MOS99 0072 FF00 ; Page $FF contains code which has to be located at a fixed -- MOS99 0073 FF00 ; place in memory. Two main types of code come into this -- MOS99 0074 FF00 ; category: -- MOS99 0075 FF00 ; (a) Code to call a routine located in a paged ROM -- MOS99 0076 FF00 ; (b) Fixed OS calls -- MOS99 0077 FF00 -- MOS99 0078 FF00 ; Calls to the operating system are normally made by calling -- MOS99 0079 FF00 ; JMIs located at the top of the address space of the m/c. -- MOS99 0080 FF00 ; The indirection vectors are located in page 2 starting at -- MOS99 0081 FF00 ; $0200. To redirect an OS call which indirects thru location -- MOS99 0082 FF00 ; $0200+2*x: -- MOS99 0083 FF00 ; (a) Set up a 3-byte tuple at location ROMVEC+3*x to refer -- MOS99 0084 FF00 ; to the paged ROM entry point -- MOS99 0085 FF00 ; (b) Set the OS indirection at location $0200+2*x to value -- MOS99 0086 FF00 ; $FF00+3*x -- MOS99 0087 FF00 ; A JMI $0200+2*x will then result in the routine in paged ROM -- MOS99 0088 FF00 ; being called. The routine is entered with A, X, Y and P -- MOS99 0089 FF00 ; unaltered since the point of call. Similarly, no registers -- MOS99 0090 FF00 ; are corrupted on return from the routine. -- MOS99 0091 FF00 ; -- MOS99 0092 FF00 ; Locations $FF00 onwards contain JSRs to the same location (OSROM); -- MOS99 0093 FF00 ; thus when OSROM is entered the top entry on the stack determines -- MOS99 0094 FF00 ; which JSR OSROM was called, enabling the OS call made to be -- MOS99 0095 FF00 ; identified (by convention paged ROM routed indirections thru -- MOS99 0096 FF00 ; $0200+2*x jump to location $FF00+3*x). -- MOS99 0097 FF00 -- MOS99 0098 FF00 ROMUSR -- MOS99 0099 FF00 20 92 FF JSR OSROM -- MOS99 0100 FF03 -- MOS99 0101 FF03 ROMBRK -- MOS99 0102 FF03 20 92 FF JSR OSROM -- MOS99 0103 FF06 -- MOS99 0104 FF06 ROMIRA -- MOS99 0105 FF06 20 92 FF JSR OSROM -- MOS99 0106 FF09 -- MOS99 0107 FF09 ROMIRB -- MOS99 0108 FF09 20 92 FF JSR OSROM -- MOS99 0109 FF0C -- MOS99 0110 FF0C ROMCOM -- MOS99 0111 FF0C 20 92 FF JSR OSROM -- MOS99 0112 FF0F -- MOS99 0113 FF0F ROMBYT -- MOS99 0114 FF0F 20 92 FF JSR OSROM -- MOS99 0115 FF12 -- MOS99 0116 FF12 ROMWRD -- MOS99 0117 FF12 20 92 FF JSR OSROM -- MOS99 0118 FF15 -- MOS99 0119 FF15 ROMWRC -- MOS99 0120 FF15 20 92 FF JSR OSROM -- MOS99 0121 FF18 -- MOS99 0122 FF18 ROMRDC -- MOS99 0123 FF18 20 92 FF JSR OSROM -- MOS99 0124 FF1B MOS99 MOS99 MOS99 MOS99 Acorn macro assembler Page 148 MOS99 MOS99 Operating system ROM entry points and hardware vectors MOS99 -- MOS99 0125 FF1B ROMFIL -- MOS99 0126 FF1B 20 92 FF JSR OSROM -- MOS99 0127 FF1E -- MOS99 0128 FF1E ROMARG -- MOS99 0129 FF1E 20 92 FF JSR OSROM -- MOS99 0130 FF21 -- MOS99 0131 FF21 ROMBGT -- MOS99 0132 FF21 20 92 FF JSR OSROM -- MOS99 0133 FF24 -- MOS99 0134 FF24 ROMBPT -- MOS99 0135 FF24 20 92 FF JSR OSROM -- MOS99 0136 FF27 -- MOS99 0137 FF27 ROMGPB -- MOS99 0138 FF27 20 92 FF JSR OSROM -- MOS99 0139 FF2A -- MOS99 0140 FF2A ROMFND -- MOS99 0141 FF2A 20 92 FF JSR OSROM -- MOS99 0142 FF2D -- MOS99 0143 FF2D ROMFSC -- MOS99 0144 FF2D 20 92 FF JSR OSROM -- MOS99 0145 FF30 -- MOS99 0146 FF30 ROMEVT -- MOS99 0147 FF30 20 92 FF JSR OSROM -- MOS99 0148 FF33 -- MOS99 0149 FF33 ROMUPT -- MOS99 0150 FF33 20 92 FF JSR OSROM -- MOS99 0151 FF36 -- MOS99 0152 FF36 ROMNET -- MOS99 0153 FF36 20 92 FF JSR OSROM -- MOS99 0154 FF39 -- MOS99 0155 FF39 ROMVDU -- MOS99 0156 FF39 20 92 FF JSR OSROM -- MOS99 0157 FF3C -- MOS99 0158 FF3C ROMKEY -- MOS99 0159 FF3C 20 92 FF JSR OSROM -- MOS99 0160 FF3F -- MOS99 0161 FF3F ROMINS -- MOS99 0162 FF3F 20 92 FF JSR OSROM -- MOS99 0163 FF42 -- MOS99 0164 FF42 ROMREM -- MOS99 0165 FF42 20 92 FF JSR OSROM -- MOS99 0166 FF45 -- MOS99 0167 FF45 ROMCNP -- MOS99 0168 FF45 20 92 FF JSR OSROM -- MOS99 0169 FF48 -- MOS99 0170 FF48 20 92 FF JSR OSROM -- MOS99 0171 FF4B -- MOS99 0172 FF4B 20 92 FF JSR OSROM -- MOS99 0173 FF4E -- MOS99 0174 FF4E 20 92 FF JSR OSROM -- MOS99 0175 FF51 -- MOS99 0176 FF51 [ MOS125 = &FF -- MOS99 0276 FF51 ] -- MOS99 0277 FF51 -- MOS99 0278 FF51 [ MOS125 = &7F -- MOS99 0279 FF51 [ STARGO = &00 -- MOS99 0280 FF51 00 % 1 ;1 byte padding -- MOS99 0281 FF52 -- MOS99 0282 FF52 ARGSW -- MOS99 0283 FF52 C9 01 CMPIM &01 -- MOS99 0284 FF54 D0 0D BNE UPARGS MOS99 0284 FF54 v72 MOS99 0285 FF56 C0 00 CPYIM &00 MOS99 0284 FF54 v72 MOS99 0286 FF58 D0 09 BNE UPARGS MOS99 0284 FF54 v72 MOS99 0287 FF5A AC D1 02 LDY TAILHI ;OSARGS A=1, Y=0 return command line tail MOS99 0284 FF54 v72 MOS99 0288 FF5D F0 04 BEQ UPARGS ;return *GO/CFS pointer if valid MOS99 0284 FF54 v72 MOS99 0289 FF5F 88 DEY MOS99 0284 FF54 v72 MOS99 0290 FF60 4C AD DF JMP RETAIL MOS99 0284 FF54 v72 MOS99 0291 FF63 UPARGS ;call upstream OSARGS MOS99 0284 FF54 v72 MOS99 0292 FF63 6C 14 02 JMI ARGVEC -- MOS99 0293 FF66 | -- MOS99 0295 FF66 ] -- MOS99 0296 FF66 FXBPUT ;FX entry, C=1 -- MOS99 0297 FF66 8A TXA ;A = character -- MOS99 0298 FF67 B0 6B BCS OSBPUT ;[ALWAYS jump] MOS99 0298 FF67 v14 MOS99 0299 FF69 ] MOS99 0298 FF67 v14 MOS99 0300 FF69 MOS99 0298 FF67 v14 MOS99 0301 FF69 [ MOS125 = &00 MOS99 0298 FF67 v14 MOS99 0303 FF69 ] MOS99 0298 FF67 v14 MOS99 0304 FF69 MOS99 0298 FF67 v14 MOS99 0305 FF69 [ MOS125 = &FF MOS99 0298 FF67 v14 MOS99 0306 FF69 | MOS99 0298 FF67 v14 MOS99 0307 FF69 48 FUDGE PHA MOS99 0298 FF67 v14 MOS99 0308 FF6A 48 PHA MOS99 0298 FF67 v14 MOS99 0309 FF6B 08 PHP MOS99 0298 FF67 v14 MOS99 0310 FF6C 48 PHA MOS99 0298 FF67 v14 MOS99 0311 FF6D 8A TXA MOS99 0298 FF67 v14 MOS99 0312 FF6E 48 PHA MOS99 0298 FF67 v14 MOS99 0313 FF6F 98 TYA MOS99 0298 FF67 v14 MOS99 0314 FF70 48 PHA MOS99 0298 FF67 v14 MOS99 0315 FF71 BA TSX ;y x a p a a 88 FF el eh cl ch MOS99 0298 FF67 v14 MOS99 0316 FF72 BC 09 01 LDYAX &0109 ;get vector offset+2 MOS99 0298 FF67 v14 MOS99 0317 FF75 B9 9D 0D LDAAY ROMVEC-&02+&00 MOS99 0298 FF67 v14 MOS99 0318 FF78 9D 05 01 STAAX &0105 ;copy LSB vector over placeholder MOS99 0298 FF67 v14 MOS99 0319 FF7B B9 9E 0D LDAAY ROMVEC-&02+&01 MOS99 0298 FF67 v14 MOS99 0320 FF7E 9D 06 01 STAAX &0106 ;copy MSB vector over placeholder MOS99 0298 FF67 v14 MOS99 0321 FF81 A5 F4 LDA ROMID ;copy ROM slot over MSB vector offset MOS99 0298 FF67 v14 MOS99 0322 FF83 9D 0A 01 STAAX &010A ;y x a p vl vh 88 FF el r cl ch MOS99 0298 FF67 v14 MOS99 0323 FF86 68 PLA ;Y in A ready to restore MOS99 0298 FF67 v14 MOS99 0324 FF87 BE 9F 0D LDXAY ROMVEC-&02+&02 ;get vector ROM slot MOS99 0298 FF67 v14 MOS99 0325 FF8A A8 TAY ;restore Y MOS99 0298 FF67 v14 MOS99 0326 FF8B 68 PLA ;X in A ready to restore MOS99 0298 FF67 v14 MOS99 0327 FF8C 20 E2 DB JSR STXROM ;set destination ROM slot MOS99 0298 FF67 v14 MOS99 0328 FF8F AA TAX ;restore X MOS99 0298 FF67 v14 MOS99 0329 FF90 68 PLA ;restore A MOS99 0298 FF67 v14 MOS99 0330 FF91 40 RTI ;restore P and jump to vector MOS99 0298 FF67 v14 MOS99 0331 FF92 MOS99 0298 FF67 v14 MOS99 0332 FF92 20 69 FF OSROM JSR FUDGE ;push restore address on stack, RTS returns below MOS99 0298 FF67 v14 MOS99 0333 FF95 ;routine to restore ROM slot from indirection MOS99 0298 FF67 v14 MOS99 0334 FF95 08 PHP MOS99 0298 FF67 v14 MOS99 0335 FF96 48 PHA MOS99 0298 FF67 v14 MOS99 0336 FF97 8A TXA MOS99 0298 FF67 v14 MOS99 0337 FF98 48 PHA MOS99 0298 FF67 v14 MOS99 0338 FF99 BA TSX ;x a p el r cl ch MOS99 0298 FF67 v14 MOS99 0339 FF9A BD 05 01 LDAAX &0105 MOS99 0298 FF67 v14 MOS99 0340 FF9D 85 F4 STA ROMID MOS99 0298 FF67 v14 MOS99 0341 FF9F 8D 30 FE STA ROM ;restore ROM slot MOS99 0298 FF67 v14 MOS99 0342 FFA2 BD 03 01 LDAAX &0103 MOS99 0298 FF67 v14 MOS99 0343 FFA5 9D 04 01 STAAX &0104 MOS99 0298 FF67 v14 MOS99 0344 FFA8 9D 05 01 STAAX &0105 ;copy status over vec offset and ROM slot MOS99 0298 FF67 v14 MOS99 0345 FFAB 68 PLA MOS99 0298 FF67 v14 MOS99 0346 FFAC AA TAX ;restore X MOS99 MOS99 MOS99 MOS99 Acorn macro assembler Page 149 MOS99 MOS99 Operating system ROM entry points and hardware vectors MOS99 MOS99 0298 FF67 v14 MOS99 0347 FFAD 68 PLA ;restore A MOS99 0298 FF67 v14 MOS99 0348 FFAE 28 PLP MOS99 0298 FF67 v14 MOS99 0349 FFAF 28 PLP MOS99 0298 FF67 v14 MOS99 0350 FFB0 28 PLP ;restore status (and discard 2 copies) MOS99 0298 FF67 v14 MOS99 0351 FFB1 VINUSE ;target of vectors in use by a client waiting for a server MOS99 0298 FF67 v14 MOS99 0352 FFB1 EA NOP MOS99 0298 FF67 v14 MOS99 0353 FFB2 DEFEVT ;default EVENT routine MOS99 0298 FF67 v14 MOS99 0354 FFB2 DEFUPT ;default user print routine (simulate printer busy) MOS99 0298 FF67 v14 MOS99 0355 FFB2 DEFNET ;default net routine (simulate printer busy) MOS99 0298 FF67 v14 MOS99 0356 FFB2 RTS MOS99 0298 FF67 v14 MOS99 0357 FFB2 60 RTS MOS99 0298 FF67 v14 MOS99 0358 FFB3 ] MOS99 0298 FF67 v14 MOS99 0359 FFB3 MOS99 0298 FF67 v14 MOS99 0360 FFB3 [ MOS125 = &7F MOS99 0298 FF67 v14 MOS99 0361 FFB3 ;FXBPUT gives up its place to OSWRSC MOS99 0298 FF67 v14 MOS99 0362 FFB3 ;to keep VINUSE and RTS in the same place MOS99 0298 FF67 v14 MOS99 0363 FFB3 | MOS99 0298 FF67 v14 MOS99 0367 FFB3 ] MOS99 0298 FF67 v14 MOS99 0368 FFB3 MOS99 0298 FF67 v14 MOS99 0369 FFB3 [ MOS125 = &FF MOS99 0298 FF67 v14 MOS99 0381 FFB3 ] MOS99 0298 FF67 v14 MOS99 0382 FFB3 MOS99 0298 FF67 v14 MOS99 0383 FFB3 [ MOS125 = &7F MOS99 0298 FF67 v14 MOS99 0384 FFB3 4C 1C D1 OSWRSC JMP WRSC MOS99 0298 FF67 v14 MOS99 0385 FFB6 ] MOS99 0298 FF67 v14 MOS99 0386 FFB6 MOS99 0298 FF67 v14 MOS99 0387 FFB6 ; security copy of indirection data MOS99 0298 FF67 v14 MOS99 0388 FFB6 36 = VLEN MOS99 0298 FF67 v14 MOS99 0389 FFB7 D9 = IPAGE2 MOS99 0298 FF67 v14 MOS99 0390 FFB8 D8 = /(IPAGE2 ) MOS99 0298 FF67 v14 MOS99 0391 FFB9 ; MOS99 0298 FF67 v14 MOS99 0392 FFB9 4C D7 DB JMP RPROM ;read byte from paged ROM MOS99 0298 FF67 v14 MOS99 0393 FFBC 4C C0 C4 JMP VDU ;raw VDU WRCH (corrupts A, X and Y) MOS99 0298 FF67 v14 MOS99 0394 FFBF 4C 0C E5 JMP EVENT ;signal event MOS99 0298 FF67 v14 MOS99 0395 FFC2 4C 85 EA JMP GSINTS ;used by paged ROMs MOS99 0298 FF67 v14 MOS99 0396 FFC5 4C 96 EA JMP GSREAD ;used by paged ROMs MOS99 0298 FF67 v14 MOS99 0397 FFC8 4C 78 DE JMP RDCH ;used by tube MOS99 0298 FF67 v14 MOS99 0398 FFCB 4C 08 E1 JMP WRCH ;used by tube MOS99 0298 FF67 v14 MOS99 0399 FFCE 6C 1C 02 OSFIND JMI FNDVEC MOS99 0298 FF67 v14 MOS99 0400 FFD1 MOS99 0298 FF67 v14 MOS99 0401 FFD1 6C 1A 02 OSBGPB JMI GPBVEC MOS99 0298 FF67 v14 MOS99 0402 FFD4 6C 18 02 OSBPUT JMI BPTVEC -- MOS99 0403 FFD7 6C 16 02 OSBGET JMI BGTVEC -- MOS99 0404 FFDA [ MOS125 = &7F -- MOS99 0405 FFDA [ STARGO = &00 -- MOS99 0406 FFDA 4C 52 FF OSARGS JMP ARGSW -- MOS99 0407 FFDD | -- MOS99 0409 FFDD ] -- MOS99 0410 FFDD | -- MOS99 0412 FFDD ] -- MOS99 0413 FFDD 6C 12 02 OSFILE JMI FILVEC -- MOS99 0414 FFE0 6C 10 02 OSRDCH JMI RDCVEC -- MOS99 0415 FFE3 C9 0D OSASCI CMPIM MCR -- MOS99 0416 FFE5 D0 07 BNE OSWRCH MOS99 0416 FFE5 v78 MOS99 0417 FFE7 A9 0A OSNEWL LDAIM MLF MOS99 0416 FFE5 v78 MOS99 0418 FFE9 20 EE FF JSR OSWRCH MOS99 0416 FFE5 v78 MOS99 0419 FFEC [ MOS125 = &FF MOS99 0416 FFE5 v78 MOS99 0420 FFEC | MOS99 0416 FFE5 v78 MOS99 0421 FFEC WRCR MOS99 0416 FFE5 v78 MOS99 0422 FFEC ] MOS99 0416 FFE5 v78 MOS99 0423 FFEC A9 0D LDAIM MCR MOS99 0416 FFE5 v78 MOS99 0424 FFEE 6C 0E 02 OSWRCH JMI WRCVEC -- MOS99 0425 FFF1 6C 0C 02 OSWORD JMI WORVEC -- MOS99 0426 FFF4 6C 0A 02 OSBYTE JMI BYTVEC -- MOS99 0427 FFF7 6C 08 02 OSCLI JMI COMVEC -- MOS99 0428 FFFA -- MOS99 0429 FFFA ; hardware vectors -- MOS99 0430 FFFA 00 = NMI ;non-maskable interrupt -- MOS99 0431 FFFB 0D = /(NMI ) -- MOS99 0432 FFFC 66 = MRESET ;hardware reset -- MOS99 0433 FFFD D9 = /(MRESET ) -- MOS99 0434 FFFE E8 = IRQ ;interrupt -- MOS99 0435 FFFF DB = /(IRQ ) -- MOS99 0436 0000 ENDROM ;end of ROM -- MOS99 0437 0000 -- MOS99 0438 0000 [ ENDROM=0 -- MOS99 0439 0000 | -- MOS99 0441 0000 ] -- MOS99 0442 0000 -- MOS99 0443 0000 TTL BBC Microcomputer Machine Operating System (MOS) -- MOS99 0444 0000 -- MOS99 0445 0000 OPT OPPON -- MOS99 0446 0000 -- MOS99 0447 0000 END Assembly finished, no errors Action : *spool This Perl script creates the slack columns from the raw listing. Copy the text between the cut lines. Paste it into a new file, slack.pl, and remove the first 30 characters from each line. Then call it with perl slack.pl stargo.asm.txt >stargo-slack.txt -------->8--- #!/usr/bin/perl $base=0xc000; @slack = (0x80) x 0x4001; open(ASM,'<'.shift(@ARGV))or die; while(){ y/ -~//cd; if(/^Action :\s*asm\s+([A-Z0-9._-]+)/i) { $file=sprintf("%-7s",$1); } elsif(/^[0-9A-F]{4} [0-9A-F]{4} ...... LNK\s+([A-Z0-9._-]+)\s*$/) { $file=sprintf("%-7s",$1); # Link filename not held over as LNK lines do not assemble instructions. } elsif(/^([0-9A-F]{4}) ([0-9A-F]{4}) .. .. .. /) { $line=$1; $pc=hex($2); $label[$pc-$base] = $file.' '.$line.' '.$2 if $pc >= $base; } if(/^([0-9A-F]{4}) ([0-9A-F]{4}) [13579BDF]0 ([0-9A-F]{2}) ...... B/){ $line=$1; $pc=hex($2); $op=hex($3); if($op & 0x80) { $dest = $pc + 2 - 0x100 + $op; $slack = $op - 0x80; for($i = $pc + 2 - $base + $op - 0xFF; $i <= $pc - $base; ++$i) { if($slack[$i] > $slack) { $slack[$i] = $slack; $source[$i] = $pc-$base; } } } else { $dest = $pc + 2 + $op; $slack = 0x7f - $op; for($i = $pc + 2 - $base; $i <= $pc + 2 - $base + $op; ++$i) { if($slack[$i] > $slack) { $slack[$i] = $slack; $source[$i] = $pc-$base; } } } } } undef $file; undef $link; seek(ASM,0,0); while(){ y/ -~//cd; if(/^Action :\s*asm\s+([A-Z0-9._-]+)/i) { $link=sprintf("%-7s",$1); } elsif(/^[0-9A-F]{4} [0-9A-F]{4} ...... LNK\s+([A-Z0-9._-]+)\s*$/) { $link=sprintf("%-7s",$1); } elsif(/^[0-9A-F]{4} [0-9A-F]{4} ...... END\s*$/) { $link=sprintf("%-7s",""); } if(/^([0-9A-F]{4}) ([0-9A-F]{4})(.*)$/) { $line=$1; $pc=hex($2); $source=$3; if($pc>=$base && $slack[$pc-$base] < 0x80) { printf("%-17s %s%02X %-7s %s\n", (($pc>=$base && defined($source[$pc-$base]) && defined($label[$source[$pc-$base]])) ? $label[$source[$pc-$base]] : ''), (($source[$pc-$base] < $pc-$base) ? 'v' : '^'), $slack[$pc-$base], $file, $_); } else { printf(" -- %-7s %s\n", $file, $_); } } else { printf(" %-7s %s\n", $file, $_); } if(defined($link)) { $file=$link; undef $link; } } -------->8--- End of stargo-slack.txt