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Re: ProDOS-cracking DOS 3.3?

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On Wed, 26 Nov 2025, Peter Ferrie wrote:

> https://github.com/a2-4am/probable
> runs DOS disk images from ProDOS.  Maybe start there?

That sounds like what I call the "MECC Method" - use a disk image to run 
DOS 3.3 software but replace RWTS with ProDOS calls.  For something like 
Ae, (using the "AppleWorks" method of doing boot/program with ProDOS-8) 
this could be the best way to implement the second side of the disk (but 
some additional code would be needed to implement the front/loader side).

(Part of the answer to Ae is sparse files; back in 2019 I attempted to 
filecrack it myself and was able to create a disk image with the back side 
of the game disk and 3.5K to spare, but I wasn't able to actually create 
the loader.)

What I was trying to do was something a bit more complex: hack into DOS 
3.3 at the level of - I think it's referred to as the File Manager. 
Implementing the CHR$(4) hooks would be a lot easier but it would only 
work for a few programs - this would theoretically work for something like 
Railroad Works, which does seem to rely on the filesystem, but doesn't use 
the CHR$(4) hooks.

-uso.

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ProDOS-cracking DOS 3.3? Steve Nickolas <usotsuki@buric.co> - 2025-11-07 21:24 -0500
  Re: ProDOS-cracking DOS 3.3? Peter Ferrie <peter.ferrie@gmail.com> - 2025-11-26 04:44 +0000
    Re: ProDOS-cracking DOS 3.3? Steve Nickolas <usotsuki@buric.co> - 2025-11-26 06:48 -0500

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