Place your NeoGeo game ROMs (also zipped) in the same roms folder. When you launch a game, MAME will first load the BIOS from neogeo.zip , then load the game ROM.
In MAME, you can hit Tab -> Configure Machine to switch between MVS (Arcade) and AES (Console) or change regions. mame neogeo bios
: If you want to play in home console mode (AES), you may need an additional aes.zip file depending on your MAME configuration or frontend. How to fix Neo Geo games not found on Bittboy? - Facebook Place your NeoGeo game ROMs (also zipped) in