Install the emulator from the Google Play Store.
A "ROM set" is a curated collection of game files that work with a specific version of MAME: roms for mame 0139u1
: Keeps the game list organized and reduces file clutter. Install the emulator from the Google Play Store
If you try to run Killer Instinct with a CHD from MAME 0.200 on MAME 0.139u1, it will fail. CHD versions are not backward-compatible. You need CHD v3 or v4 (depending on the game) for 0.139u1. Newer MAME uses CHD v5. CHD versions are not backward-compatible
Open the MAME emulator, select the game, and press Enter. Troubleshooting If a game does not load:
This was the last version where CPS3 emulation (Street Fighter III series) worked without extensive audio lag. You will need the .chd files placed in a folder named after the ROM inside your roms directory.
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."