Pete Rittwage wrote:
I'm pretty sure you can see what those circuits do
by looking at the Apple
II (or Plus) motherboards- at least for the IIe. :)
For the IIe, and IIc it is mostly obvious. There are perhaps a few
subtleties, though. But I'm pretty sure that I could program CPLD or
FPGA equivalents that would work fine to replce them.
For the IIgs, there's a lot more going on in some of the ASICs. The
broad functionality is clear, but the details are not.