No luck with the BIOS, unfortunately.

I went to Mamedev (hope that doesn’t count as linking to roms) to find the BIOS and put the whole .zip into the /mame/ folder. I can see it in EmulationStation along with the other roms. I feel like I’m missing something here. I haven’t done anything with the Geo at all. Was I supposed to put anything into /pi/BIOS/, or anywhere in /mame4all-pi/?

I’m trying to test with Pac-Man and Metal Slug 6 if that would affect anything.