A full MAME 0.139 set typically weighs in at approximately for the ROM files alone, depending on whether it includes "CHDs" (Compressed Hard Disk images for newer arcade games). ROM sets generally come in three formats:
In the RetroArch ecosystem, the MAME 2010 core is designed to run the 0.139 romset. mame 0.139 romset
The most popular MAME emulator on Android is built specifically on the 0.139 engine. A full MAME 0