I'm testing this rp2040-based text terminal on an LCD but ultimately it'll be running at 132x53 on a vintage IBM 9" paperwhite CRT. Source at https://github.com/jepler/cr100 is probably not ready for anybody else to use. Coded with pico-sdk
Core 1 races the beam to generate pixels while Core 0 remains free for what will eventually be a PS/2 keyboard decoder, UART communications, and ANSI-style terminal code interpreter.
Why is the text green? Because these old monochrome monitors only used the green signal and ignored red and blue. And it's easier to just not generate it in software, either.
For now, well, the screen update rate is pretty good.
#rp2040 #cathoderaytube #retrocomputing