The Sega CD (known as the Mega-CD outside North America) requires specific BIOS files to function in emulators like (using the Genesis Plus GX or PicoDrive cores) and
: Some multi-region games or homebrew titles check for specific BIOS versions to determine video frequency (50Hz vs 60Hz). Recommended BIOS Files sega cd bios-cd-e.bin bios-cd-j.bin bios-cd-u.bin
Most official BIOS versions include checks that prevent a disc from one region from booting on a console (or BIOS) of another. The Sega CD (known as the Mega-CD outside