A tiny lil OS
Instructions:
Downloading source: Download source and extract it somewhere, then simply run compile.sh, it will compile it and run QEMU
Downloading precompiled: Move it somewhere and run: qemu-system-x86_64 -drive file=os.img,format=raw,if=floppy
Note: The compile script requires NASM and Qemu, and also uses linux commands, so please do it in WSL if on windows.
It runs on Real mode on x86_64 BIOS machines, It has been recorded running on 515 bytes of RAM, but i recommend more like 1KB.