Made by: Sega Variants: Mega Drive 2, Genesis 3, Sega Mega Jet, Sega Nomad, Sega Teradrive Processor: Motorola 68000 (or equivalent), 7.67MHz NTSC/7.61MHz PAL; Zilog Z80 (or equivalent) for sound programming and Master System compatibility, 3.58MHz NTSC/3.55MHz PAL Released in US: 9 January 1989 Released in EU: Winter 1990 Released in JP: 29 October 1988