For physical consoles, UniBIOS 2.3 usually requires a hardware modification.
If you are using this BIOS in an emulator or on real hardware, use these button combinations at startup: Google Groups Main Setup Menu: during the splash screen. In-Game Menu: Start + Select (or Start + A + B + C) during gameplay. Are you looking to set this up for a specific emulator like RetroArch or using it on original hardware UniBios for NeoGeo games in RetroArch uni bios23 zip
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