unzip the BIOS file; MAME reads the contents directly from the compressed folder. LaunchBox Community Forums specific BIOS zip file is required for a particular game you're trying to run? Primal Rage 2 playable in 0.275 : r/MAME
A failed update or an interrupted installation process may have prevented the file from being written to the disk. 78081g503.ic655 not found
Update your BIOS files ( coh3002c.zip and coh1002m.zip ) to match the version of MAME you are running (MAME 0.181+). unzip the BIOS file; MAME reads the contents