At this screen if you press A+B+C buttons all all the same time it will take you into the UniBios config and in here you can set your region and whether or not it is the console or arcade version of the game. Exit out and restart your game, if everything went well you should now see a different boot screen telling you that it is UniBios. In there for Bios select Unibios and then a littel further down you can select specific version of Unibios if it detects you have multiple versions. The way you actually setup your UniBios in Retroarch though is with game loaded bring up the RA quick menu and go into the core options. Ad-free browsing Rom recommendations tailored to you (the more roms you rate or add to your collection, the better the recommendations become). Here's a screenshot of the inside of my neogeo.zip, though yours may be a bit different, but you should have at least UniBios version 3.0 or maybe even 3.1. File Name: Fightcade 2 + Roms Kof + Bios Neogeo.Zip: Upload Date: 07:28:22: Mime Type: Application/zip: Virus Scan Result: Clean: Size: 518.43 MB. The actual UniBios file should be inside your neogeo.zip bios file and that file goes in the same folder as your NeoGeo roms.

Neogeo bios zip