Developer vibe-codes an operating system from scratch that can run DOOM

A developer under the nickname FunnyName used Claude Code to create an experimental OS called Ember that boots from USB on an old Lenovo Yoga laptop. The 46 KB kernel is written in NASM assembly, the system with desktop takes under 800 KB, supports DOS programs, Sound Blaster emulation and runs DOOM.

• Ember kernel is 46 KB in NASM, whole system under 800 KB
• OS boots directly from USB on a Lenovo Yoga without Linux or FreeDOS
• Supports DOS .COM and .EXE, Sound Blaster and PC speaker emulation
• Sound Blaster emulation took three days of work with Opus 5 High