Somewhat patiently waiting for nextpnr to build so I can start working on some W65C51/MAX232 circuits with my Lattice UP5k board.

Built a test circuit, but I'm limited in what I can test. The UP5k is 3.3v logic and I don't have logic level shifters, so I can't safely read from the 6551.

Show thread

Implemented basic 2-way communication between my desktop and a microcontroller using the w65c51/max232. Now that I understand these chips, the next thing is to add support for them to the emulator for my 6502 machine. Then I'll write and test the serial port routines before moving it all over to hardware again.

Sign in to participate in the conversation

Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.