There’s no fixed download link, but I got the UF2 download from this thread “PicoMite V5.07.01b16: Breaking changes and CSUBs”, and the manual lives in this thread “User Manual for the Picomite (draft)”. On installation, the UF2 drops you into the MMBasic REPL.
It supports an impressive range of displays and peripherals. The project gives me a very distinct “This is how we do things” vibe, and it’s quite unlike any other Raspberry Pi Pico project.
To show you what MMBasic code looks like, here’s a little demo that uses one of those “Open Smart” LED traffic lights on physical pins 14-16 which cycles through the phases every few seconds:
' traffic light on gp10-12 (green, yellow, red), pins 14-16 ' set up ports for output FOR i=14 TO 16 SETPIN i, DOUT PIN(i)=0 NEXT i red=16 amber=15 green=14 DO ' green on for 5 seconds PIN(red)=0 PIN(green)=1 PAUSE 5000 ' amber on for 3 seconds PIN(green)=0 PIN(amber)=1 PAUSE 3000 ' red on for 5 seconds PIN(amber)=0 PIN(red)=1 PAUSE 5000 LOOP