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Patch Fix for Sargon
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1993-10-20
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The following are instructions for patching your copy of Sargon IV (Mac) so
that it will work on newer Mac computers. Apart from this patch, Sargon
crashes on any Mac later than the IIci due to some kind of a ROM conflict.
To apply this patch, you'll need a hex editor capable of editing a file's
resource fork directly. You could probably use ResEdit, but I don't know
which CODE resource needs modified (there are several). I used Norton Disk
Editor (part of Norton Utilities). There's also an old freeware progam
called FEdit that would do it, as well as some others that I'm probably not
familiar with (Central Point MacTools?).
As always, work only on a _copy_ of Sargon, not on the original disk
verison. If you badly botch something (which is very possible editing hex),
you can just toss it and make a new copy to try again.
Here are the instructions, as they worked for me in Norton:
1. Open the resource fork of Sargon IV.
2. Search for the following hex bytes:
226F 0004 5229 FFDA 337C 000A 000A
and change the first 4 bytes so it looks like....
2248 4E71 5229 FFDA 337C 000A 000A
3. Find the next occurance of
226F 0004
and change to
2248 4E71
4. Save the changes and quit Norton.
Sargon IV has worked flawlessly on my Centris 610 with system 7.1, caches on,
32 bit processing on. I've had one crash on my PowerBook 160, when I put the
system to sleep while Sargon was thinking. Otherwise, it works normally! The
original poster on rec.games.chess cautioned about program switching under
System 7 or Multifinder while Sargon is thinking. I haven't seen this type of
crash yet, but rarely switch out while playing a game anyway.
John Rummel 71333,1073
GO CHESSFORUM