I am Arthur Krewat - the guy who did the final conversion of the C64 Impossible Mission to the Atari 7800.
It was originally started by another contractor in the company (Brian Richter, Computer Magic, LTD), but I had to finish it up after he quit. I had to re-work major sections of the game because of performance - mostly graphics.
For the record, I did supply Atari with a game that was able to be completed. I played it myself all the way to the end a few times before giving it over to the Atari testing department and they signed off on it so Computer Magic would get paid for the game.
However, they either used an earlier version from during development, or did something else to reduce the amount of RAM it required and introduced that "unfinishable" bug.
Does anyone have any info about the fix?
Does anyone have a copy of the IM ROM? I have one I found on the net, but not sure it's not corrupt.
I checked it against some HEX files I have of the version I supplied to Atari, and it appears to be intact, except there are areas that do not match WHATSOEVER. Yes, I have the source code, or at least 99% of it. I have to reconstruct one file from an earlier version I had, which is also why I am hunting for a good ROM image. I want to examine that ROM image and reconstruct one ASM file from it.
DO NOT ask for the source code. Yet. I signed a non-disclosure agreement, granted that was 20+ years ago, but I am still bound by it. I want to figure out what the problem with Atari's version was, and see if it's my fault or not
PS: Anyone know anything about 2500 AD x6502 cross compiler for MSDOS (command was x6502) plus it's linker (link2) ?
Edited by krewat, Fri Dec 5, 2008 4:36 PM.