mame/ ├── roms/ │ ├── neogeo.zip ← BIOS files (never delete) │ └── samsho.zip ← any Neo Geo game ROM
MAME officially supports the original SNK BIOSes and the Universe BIOS as a softlist addition. mame neogeo bios
MAME requires the BIOS to remain inside the ZIP archive. mame/ ├── roms/ │ ├── neogeo