Higan emulator essential use note

Play GBA games with higan

Higan expects a GBA BIOS to run GBA games. You may grab an open-source one from TempGBA. Its source code in github has the Normmatt's open-source GBA BIOS replacement in its bios/ folder. Rename the file to bios.rom and put it under Game Boy Advanced.sys/ folder of higan.