So I hacked Pitfall 2 to add a save/load game state feature. Press OPTION during the game to pull up the menu. You can format a disk, save to the disk, or load from the disk. Pitfall 2 was "fun" to hack since the protections on it were so hard to bypass. In the end, I wound up leaving the rom strictly alone; instead, I reassembled the game code to 10KB below the rom, stripping out the protection code and adding the save state hack. This hack is a DOS binary program and will play on any Atari with 48KB of RAM. You can run it in Atari800 using the -run option.
Edited by Chilly Willy, Fri Dec 31, 2010 5:21 PM.