But there is a difference between downloading a few ROMs and executing a . A "full set" (often nicknamed a "MAME Split Set" or "MAME Merged Set") includes every single game, clone, bootleg, and regional variant that MAME supports. This is not a simple drag-and-drop. It is a project.
Remember the pillars:
Introduction: The Holy Grail of Emulation full mame roms install