MAME 2003-Plus (or mame2003-plus) is a Libretro core designed for high performance and broad compatibility.
: It is optimized for systems with limited processing power, where the latest "mainline" MAME might run too slowly. mame 2003plus reference link full nonmerged romsets
: It was forked from MAME 2003 (based on MAME 0.78) but is actively maintained, backporting hundreds of games and features from newer MAME versions. MAME 2003-Plus (or mame2003-plus) is a Libretro core