romset neogeo is good Check all BIOS files at once (slow):
mame gamename -bios biostag Find biostag in MAME’s -listxml output: mame bios
Use a (e.g., ClrMAMEPro, ROMVault) to keep BIOS files up-to-date with your MAME version. 6. Configuring BIOS in MAME Default behavior MAME automatically loads the correct BIOS based on the game driver. No manual config needed if files are present. Manual BIOS selection (multiple versions) Some systems have alternative BIOS versions (e.g., Neo Geo: MVS vs AES, or different regions). romset neogeo is good Check all BIOS files