Now the Gigatron is emulating a 6502 processor, the same CPU found in the Apple II and almost every other retrocomputer that isn’t running a Z80. There’s a thread over on the Gigatron forums ...

Luckily, some frugal engineers at MOS back in the 70s came up with the 6507, a variant on the 6502 in a 28-pin DIP. The other key to this build is the 6532 RAM-I/O-timer chip or RIOT, which puts a ...