Prototype GBA BIOS

No clue where I picked this up, but it's definitely strange. In addition to the changed sound, using this BIOS causes minor graphics corruption in some game

gbatek-gbaonly/index.md at gh-pages · rust-console/gbatek-gbaonly

Proto:Nintendo DS/ver.40820D - The Cutting Room Floor

Massive Nintendo Gigaleak Exposes Source Code Of Classic Games And

08, June, 2021

Dolphin Emulator - mGBA Integration: Introducing the Integrated GBA

Game Boy Advance / Useful Notes - TV Tropes

Didj gpSP GBA Emulator

Game Boy Camera Flashcart, 2x1MB, FRAM

The Emulation64 Network - NextGen and Retro Emulation News and Support

Prototypes by system/Game Boy Advance - Hidden Palace