Increasingly offtopic, but... > That must have been fun. As I recall, this was basically the > Apple ][ disk controller squished into one chip. It was hard to call > that thing a disk controller since it wasn't much more then a TTL > driver and a shift register.
And a state machine as provided by one of the PROMs. A terribly complete analysis can be found in "Understanding the Apple II" by James F Sather. > My first experience with "operating systems" was basically taking > a printout of a disassembly of Apple DOS 3.3, figuring out how it > works, and documenting the entire thing, then mangling it to do various > tricks. I wonder where that printout is? I probably still have it > somewhere. "Beneath Apple DOS", by Worth and Lechner, is probably a good alternative. Both of the books I mentioned appear to be up on scribd these days.
