Made-In-Basement/ember
An operating system written from scratch: boot sector, FAT filesystem, DOS-compatible interrupts, sound, a 32-bit runtime and a graphical desktop
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README & documentation
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An operating system written from scratch: its own boot sector, FAT filesystem, DOS-compatible interrupts, sound driver, 32-bit runtime and graphical desktop. It boots from a USB stick on a real laptop, runs real DOS programs (with Sound Blaster sound, on a machine that has no Sound Blaster), and gives you a desktop with a music player, a word processor, a paint program, touch input and 3D graphics. Nothing is borrowed from Linux, Windows or FreeDOS. The code was written by Claude (Anthropic) through Claude Code. Every feature was asked for, every design directed and every build booted and tested on real hardware by a person, who sent back what broke. Underneath is a 16-bit kernel in NASM assembly (src/, about 46 KB), a DOS-compatible INT 21h, and a 32-bit runtime (nano/) that loads flat protected-mode programs above 1 MB and lends them the BIOS. The whole desktop, every application included,…
Read the full README ↗ · Preview checked 2026-10-29T17:37:37.713Z
Inside the original README — Document outline
- Ember
- At a glance
- The desktop (EMBER)
- Features
- Building
- Running in QEMU
- Booting a real PC from a USB stick
- Legacy BIOS / CSM
- UEFI only: Ember 2.0
- Tested on
- Running DOS programs, including Doom
- NDOOM: Doom compiled for Ember
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What this repository does
An operating system written from scratch: boot sector, FAT filesystem, DOS-compatible interrupts, sound, a 32-bit runtime and a graphical desktop
Repository facts
- Owner
- Made-In-Basement
- Primary language
- Assembly
- Stars
- 149
- Forks
- 11
- Open issues + pull requests
- 1
- License
- Other
- Archived
- No
- Default branch
- main
- Created
- 2026-09-13T15:24:32.000Z
- Last push
- 2026-09-14T01:12:06.000Z
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