Reply To: neo geo and psx emulation problems Welcome Page › Forums › RetroPie Project › New to RetroPie? Start Here! › neo geo and psx emulation problems › Reply To: neo geo and psx emulation problems 01/17/2016 at 13:30 #114165 shoothereParticipant The neogeo.zip file should be in the neogeo folder, not the BIOS folder. Also: when in doubt, make sure you have a working neogeo bios. For me I was convinced I had a working one but in the end I had to download a fresh one and start from htere.