Do not unzip your BIOS files. MAME reads the contents of the zip folders dynamically. Leave them as .zip or .7z archives. Step 3: Place in the Correct Directory
While there are hundreds of specific hardware setups, a handful of BIOS files are responsible for running the majority of popular games. 1. Neo Geo ( neogeo.zip ) all mame bios
Your BIOS file is outdated for your current version of MAME. Do not unzip your BIOS files
To help me tailor any troubleshooting steps or history, let me know: Which are you currently running? What specific game or arcade system is giving you an error? all mame bios