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Some thoughts and ideas about ProDOS filecracking

From Steve Nickolas <usotsuki@buric.co>
Newsgroups comp.sys.apple2
Subject Some thoughts and ideas about ProDOS filecracking
Date 2025-11-25 00:24 -0500
Organization A noiseless patient Spider
Message-ID <alpine.DEB.2.21.2511250018190.27817@sd-159945.dedibox.fr> (permalink)

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I might not exactly be the name you think of when it comes to ProDOS 
filecracking.  I've done a bunch though.

Generally, I've tended to stick to single-load stuff, or stuff where 
finding the patch points is not difficult.  And when I've run into 
difficulties, I've often found hints in places like Computist.

While fighting with a few games that are giving me grief, I got to 
thinking about one particular one: "Ae".  This one takes two disk sides, 
and so it's a different challenge.  My first thought was to try putting 
the unprotected back of the disk into a disk image (this only works 
because of sparse files).  Then I want to try to do something like how 
AppleWorks allows itself to run either from two sides of a floppy, or a 
high-capacity storage media; this might be the way to get Ae to work from 
a floppy under ProDOS-8!  But the location of the disk code, on the text 
screen and page BF, is giving me grief.

My attempt to reconstruct Zenith from a postmortem hasn't been working, 
but I do think I got Neptune to work.

For Mr. Cool, I just neutered out the high score save.

-uso.

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Some thoughts and ideas about ProDOS filecracking Steve Nickolas <usotsuki@buric.co> - 2025-11-25 00:24 -0500

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