AthenaOS

Clean-room reimplementation of the WonderWitch FreyaBIOS/FreyaOS layer so freely available WonderWitch software can run on emulators and third-party cartridges.

Clean-room Not stated archived

Source code

Stars—

Commits, 30 days—

Latest release—

Last push—

Facts

Original: FreyaBIOS/FreyaOS (WonderWitch)
Platform: WonderSwan
Method: Clean-room
Provenance: Not stated what this means
Status: archived
Licence: MIT
Team: OpenWitch
Started: 2024-07
Needs the original: No

How to get it legally

Download it from the official repository. No original files are needed.

This project was rebuilt clean-room by OpenWitch. Facts last checked 2026-10-17. Suggest a correction

Sources

https://github.com/OpenWitch/AthenaOS

Something wrong or out of date? Send a correction.

All os & system →

Apple Silicon

AGX G16/G17 Clean Room RE

Apple G16/G17 AGX GPU (userspace)

Clean-room reverse engineering notes and probes for the userspace side of Apple's G16 and G17 AGX GPUs.

Clean-room AI-generated

IBM PC · 1981 · ★ 34

bios-8088

8088 PC BIOS

Disassembled BIOS images from 8088-era PCs.

Matching decomp Human-led

PlayStation 2 · 2000 · ★ 26

Biostation

PlayStation 2 BIOS

Clean-room reimplementation of the PS2 BIOS.

Clean-room Human-led

+1 ★ in 3 days

Xbox · 2001 · ★ 93

Cromwell

Original Xbox BIOS

Free, legal BIOS replacement for the original Xbox, written to boot Linux without Microsoft code.

Clean-room Human-led

PlayStation 2 · 2000

CrystalOSD (decomp, legacy)

PlayStation 2 OSDSYS (system menu)

Archived matching decompilation and disassembly of the PS2 OSDSYS menu, kept as reference for its native C++ reimplementation successor.

Matching decomp AI-assisted

Game Boy Advance · 2001 · ★ 71

GBA BIOS disassembly

Game Boy Advance BIOS

Disassembly of the Game Boy Advance BIOS that assembles back to a file with the original checksum.