If you are on a Raspberry Pi, do not use vanilla MAME 0.139. Use lr-mame2003 . The "2003" refers to the MAME 0.78 codebase. Wait—this is crucial: Many people confuse MAME 0.139 with MAME 0.78 (MAME 2003). Always check your core. However, the lr-mame2010 core is the direct port of MAME 0.139 for RetroArch.
: To save space, MAME uses a "Parent/Clone" system. The Parent (e.g., sfa2.zip ) contains the main game data, while Clones (e.g., sfa2u.zip for the USA version) contain only the differences. You generally need the Parent for a Clone to work. Common Set Formats mame 0.139 romset
Hardware that was emulated perfectly in 0.139 includes: If you are on a Raspberry Pi, do not use vanilla MAME 0
: Clones are tucked inside the Parent zip file. This is the most space-efficient for a full collection. Wait—this is crucial: Many people confuse MAME 0