: All files for a game and its clones (e.g., Pac-Man and its Japanese version Puckman ) are stored in a single ZIP file. This is the most space-efficient method but requires the entire "parent" set to run any variation.
MAME ROMs are . You can:
: Significant emulation improvements allowed it to reach the desktop mode. MAME 0.217 ROMset Structure Mame 0.217 Roms