LUnix on Famicom Disk System
Someone ported this 8-bit miniature Unix-like from Commodore to Nintendo.
The YouTube title is a little bit clickbaity, but the project is cool so I don't mind.
I experimented with this a little bit on C64 a few years ago! it’s very surprising what you can do with a 6502 — check out OS-9 for a cool 80s multitasking kinda-Unix-like that ran on Tandy Color Computers for an interesting comparison with LUnix