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

PLCC Replaces Game Boy Cartridge ROM

Prototypes by system/Game Boy Advance - Hidden Palace

The 10 Best GBA Emulators for Android in 2023

Prototypes by system/Game Boy Advance - Hidden Palace

The Emulation64 Network - NextGen and Retro Emulation News and Support

K1 GBA SP - The Independent Video Game Community

Another Nintendo leak uploaded online, features betas and source

Nintendo GameCube Prototype From Space World 2000 Expo is

Divers] Universe Bios v4.0 - Emu-France

WiiMednafen - GameBrew

Surface Mount SMD Fuse: Game Boy Advance SP F1 F2

Prototype GBA BIOS

Altered GBA BIOS ? - The Independent Video Game

Play Game Boy Advance Games on Other Devices- Dr.Fone