▲ 69 r/beneater
Apple 1 Compatibility with 65C21 and Arduino-Based Video and Keyboard Emulation
With a 65C21 PIA, which is still sold today on Mouser, an HC138 decoder for more granular address decoding, and an Arduino Nano to emulate the Apple 1's keyboard and video, you can modify Ben's circuit to run the entire Apple 1 software library. It was pretty cool for me to go back in time and discover some of the earliest software made for home computers. Fun upgrade if you're looking for an extension to the 6502 project!
Repo: https://github.com/The8BitEnthusiast/apple-1-breadboard-arduino
u/The8BitEnthusiast — 10 days ago