Manufacturer: Sega Released: 1985 Units sold: 18 to 21 million (incl. Tectoy variants) Best-selling game: Alex Kidd in Miracle World CPU: 8-bit Zilog Z80 @ 3.58 MHz RAM: 8 KB / VRAM: 16 KB Graphics: Sega VDP (custom TI TMS9918) Resolution: 256×192 pixels, 32 colors (64 color palette) Sound: TI SN76489 PSG, YM2413 FM add-on module Cart size: 32 KB to 1 MB