Sega · Gen 3
Sega's 8-bit home console, known as the Mark III in Japan. Competed with the Nintendo Entertainment System.
Hardware
Early Japanese version of the Master System. Does not include the FM Sound Unit built in.
Japanese version of the Master System with a built-in FM Sound Unit (YM2413), providing enhanced audio for supported games.
Original European Master System with card slot and cartridge slot.
Revised, cost-reduced Master System. Removed card slot and expansion port.