Searched for a 54kb neogeo.zip. Neogeo.zip in mame4all - what and where to put exactly. @SteffenMB The neogeo.zip is the bios pack and it goes directly to the. Download MAME BIOS pack. (Download didn't work? Click here) Step-by-Step Usage Instructions Step 1.

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So I started from scratch after getting back in to MAME from years ago. Downloaded a full.164 from pleasuredome. Downloaded MAME.164 64-bit and also MAMEUI. I can't get NEO-GEO roms to work. Error is simply 'none: invalid bios'. Now if I rename the neo-geo.zip file, it will actually list which rom files are missing which makes sense. But with the file name correct, it doesn't say what's missing.

I downloaded another older neo-geo.zip file I found on another site from an older romset and I get the same error. If I search for just that exact error, I get one link that leads to someone with the same issue who doesn't seem to have resolved it.