mame gamename -bios biostag Find biostag in MAME’s -listxml output:
Example folder layout:
| System | Required BIOS File(s) | Notes | |--------|----------------------|-------| | | neogeo.zip | Most common; required for all Neo Geo games | | Capcom CPS-1 | cps1.zip | Some games need Q-Sound BIOS | | Capcom CPS-2 | cps2.zip | Includes key security data | | Capcom CPS-3 | cps3.zip | Complex decryption required | | Nintendo PlayChoice-10 | playch10.zip | Includes dual-screen BIOS | | Sega System 16/18/32 | Various ( segabios.zip , etc.) | Varies by model | | SNK (earlier) | snk.zip | For pre-Neo Geo hardware | | Konami (some) | konamigx.zip , konicvs.zip | Specific models | | Irem (M72, M92) | irem*.zip | Required for sound/graphics init | | Namco System series | namco*.zip | Several variants | | Williams/Midway | williams.zip | For older Z80-based boards | mame bios
mame neogeo -listxml | grep -A5 "<bios" Example:
mame -verifyroms neogeo Output should be: mame gamename -bios biostag Find biostag in MAME’s
romset neogeo is good Check all BIOS files at once (slow):
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). No manual config needed if files are present
bios eur # or jap, usa, etc. for systems that support it | Symptom | Likely Cause | Solution | |---------|--------------|----------| | Game loads to black screen | Missing or wrong BIOS | Verify BIOS present and correct version | | "ROM checksum error" on boot | Corrupt BIOS or mismatch | Re-download BIOS matching MAME version | | Game plays but no sound | Missing sound BIOS (e.g., Q-Sound for CPS-1/2) | Get full BIOS set for that system | | Different region language | Wrong BIOS region | Select correct BIOS in game properties | | Neo Geo: "Insert Card" / crosshatch | BIOS present but game ROM missing | Check game ROM itself, not BIOS | | MAME can’t find BIOS even though file exists | Wrong rompath or zipped incorrectly | Ensure BIOS is in roms folder, still zipped, named exactly as MAME expects | 8. Verifying Your BIOS Setup Use MAME’s built-in audit: