Installing the GBA BIOS¶
For most of the systems higan emulates, the console itself contains (almost) no actual software, so emulating the system does not require infringing the copyright of the hardware manufacturer. However, the Game Boy Advance is different: every device contains a standard library of software routines for common functions games require, often called a “BIOS” by analogy with the Basic Input/Output System used in IBM PC compatibles.
For the same legal reasons that commercial games cannot be distributed with emulators, the GBA BIOS cannot be distributed with higan, but is required for GBA software to run.
If you have a real GBA and a flashcart, the Internet contains many tools that will extract the BIOS image so it can be copied to your desktop computer. The correct GBA BIOS file is exactly 16384 bytes long, and has the SHA-256 hash fd2547724b505f487e6dcb29ec2ecff3af35a841a77ab2e85fd87350abd36570.
Once you have the correct BIOS file:
- rename it to
- if you’re using Windows,
turn off “hide extensions for known file types”
so you don’t wind up with a file called
bios.rom.dator whatever the file’s original extension was.
- if you’re using Windows, turn off “hide extensions for known file types” so you don’t wind up with a file called
- Copy the file into higan’s
Game Boy Advance.sysdirectory, alongside the
manifest.bmlfile that is already there.
- In Windows,
Game Boy Advance.sysin the same folder as
- In Linux,
Game Boy Advance.sysin
- In Windows, find
If you upgrade this version of higan to a newer version,
make sure the
winds up in the
Game Boy Advance.sys directory
of the new version.