Open mame.ini (if it doesn’t exist, run mame -cc from the command line to create it). Ensure your rompath includes the directory with the BIOS files:
Note: MAME 0.238 does NOT require a separate “BIOS pack” in the sense of a single zip file—the correct way is to have individual ZIPs per system inside the roms/ folder. Many online “BIOS packs” simply bundle these together. Mame 0.238 Bios Pack-
A standard BIOS pack for version 0.238 typically includes hundreds of files, but some of the most sought-after include: Open mame
BIOS files are consolidated into fewer ZIPs (e.g., all Neo Geo variants in one neogeo.zip ). Size: Smaller, but may require specific naming. Open mame.ini (if it doesn’t exist