Not every arcade game is contained within a single ZIP file. Some games require extra data:
Because of copyright laws, ROM files are not hosted on official emulator websites. However, the retro gaming community has preserved these files extensively. When searching, look for reputable archive sites that specifically list the "Reference Set" for 0.139u1. This ensures that the CRC (Cyclic Redundancy Check) values of the files match what the emulator expects. How to Setup Your ROMs roms for mame 0139u1
MAME ROMs are essentially digital copies of the data stored on the original arcade machine chips. As the MAME team finds better or more complete "dumps" of these chips, they update the emulator to require the new files. If your ROM set does not match your emulator version, you will see errors like "Missing Files" or "Required Files Not Found." Not every arcade game is contained within a single ZIP file
One of the most confusing aspects of MAME is that ROMs are version-specific. You cannot simply take a ROM intended for MAME 0.250 and expect it to work on version 0.139u1. When searching, look for reputable archive sites that