"Brixius was working without an assembler back then, something he deeply regrets. He does not, however, regret his pack-rat tendencies, which have left him with these pieces to pull together:
Executable machine code, mostly from May 1985, but some from as late as 1989, with hand-written notes on it
A printed-out memory dump of all 4K of RAM from the game at some point
Cassettes and disks, some of which load, but none with an uncorrupted game running
Listings of the code from 1986, used to test machine language routines
Extensive handwritten and drawn notes, maps, and other explanations of the game's design."
