stands for Basic Input/Output System . In a home computer, the BIOS initializes hardware. In an arcade context, the BIOS is the low-level firmware stored on a ROM chip on the arcade motherboard itself.
: To force MAME to use UniBIOS by default, you can edit your neogeo.ini file (located in your MAME ini folder) and set the bios line to your preferred version, such as bios unibios40 . 4. Troubleshooting Common Issues mame neogeo bios