bbcim.exe.patch
Patch file for -40, -80, -max options of bbcim (Win32 binary)
Greg Cook, 21/Mar/2003
For bbcim 0.95 beta 2
(http://www.nvg.org/bbc/util/bbcim095-2-w32.zip)
Usage:	Either patch the binary manually from the listing, or
	enter the following Linux commands:
	mv bbcim.exe bbcim.exe.old
	xd -c bbcim.exe.old bbcim.exe.hex
	patch -Np1 < bbcim.exe.patch
	xd -l bbcim.exe.hex bbcim.exe
(xd: http://www.fourmilab.ch/xd/)

Corrects a problem with the -40, -80 and -max options of
bbcim.  The disc image had two excess bytes at the end,
containing the new sector count, and consequently the old sector
count was not replaced.  Append mode only allows writing at the
end of the file, and so read/write mode is now used instead.

Other versions of the executable (up to 0.97) can be modified in
a similar way, as there is only one occurrence of ab+

NB. I am aware of bbcim version 0.97 alpha 27, and having tried
it, I don't recommend it.  Best wait for the betas or a stable
release.

strings bbcim.exe.old | grep 0.9
0.95-beta 2

cksum bbcim.exe.old bbcim.exe
2285077706 58368 bbcim.exe.old
571042428 58368 bbcim.exe

diff -Naur bbcim.exe.old.hex bbcim.exe.hex
--- bbcim.old/bbcim.exe.hex	Fri Mar 21 15:08:42 2003
+++ bbcim/bbcim.exe.hex	Fri Mar 21 15:10:57 2003
@@ -2979,7 +2979,7 @@
   BA20: 69 73 6B 69 6D 61 67 65  0A 0A 00 00 46 69 6C 65 | iskimage....File
   BA30: 20 25 73 20 63 61 6E 6E  6F 74 20 62 65 20 6F 70 |  %s cannot be op
   BA40: 65 6E 65 64 0A 0A 00 00  61 72 67 73 0A 00 00 00 | ened....args....
-  BA50: 61 62 2B 00 75 6E 65 78  70 65 63 74 65 64 20 65 | ab+.unexpected e
+  BA50: 72 62 2B 00 75 6E 65 78  70 65 63 74 65 64 20 65 | rb+.unexpected e
   BA60: 6E 64 20 6F 66 20 74 68  65 20 64 69 73 6B 69 6D | nd of the diskim
   BA70: 61 67 65 20 61 74 20 66  69 6C 65 20 25 73 0A 0A | age at file %s..
   BA80: 00 00 00 00 73 74 61 72  74 73 65 63 74 6F 72 20 | ....startsector 

diff -Naur bbcim.old/expand_im.c bbcim/expand_im.c
--- bbcim.old/expand_im.c	Mon Jun 30 08:29:14 1997
+++ bbcim/expand_im.c	Fri Mar 21 16:19:19 2003
@@ -9,7 +9,7 @@
   unsigned char byte, bootoption;
   long i, length, expand_length;
 
-  fpdisk=fopen(disk,"ab+");
+  fpdisk=fopen(disk,"rb+");
   fseek(fpdisk,0,SEEK_END);
   length=ftell(fpdisk);
   expand_length=expand*256;

(End of bbcim.exe.patch)