Using an RP2040 to Load Programs from a SD Card into a ZX81 Microcomputer
This was a fun project, putting together my old and new hobbies. Back in the 80s, cheap personal computers used K7 tape to store programs. I still got a few of these old computers, but tape is pretty rare these days and my K7 players are breaking apart. You can find a lot of ZX81 software in the internet, as files for emulators. How about using an RP2040 to generate the necessary audio signals from these files? The final assembly