Sega SG-1000

Sega's first home console, and one of Sega's lesser known consoles, the Sega SG-1000 was surprisingly popular during its time.


After reportedly being test-marketed in 1981, the Sega SG-1000 (Sega Game 1000) was released by Sega the same day as Nintendo's Family Computer (Famicom/NES) in 1983 and was almost competition. The console sold well in Japan and Asia and then was launched in New Zealand, Australia, and France as well as other countries. The original SG-1000 was never released in the USA, but its other models were. Tsukuda originally released the Othello Multivision with its own brand games. Because the SG-1000s hardware was similar to the ColecoVision, Telegames created a clone known as the Telegames Personal Arcade in the U.S., which played ColecoVision and Sega SG-1000. The system was based on a clone of the ColecoVision known as the Dina 2-in-1. Also, Taiwan was one of the few countries to receive a platform known as the SG-1000 Mark IV.

Hardware Specs

  • CPU: NEC 780C (clone of Zilog Z80)
    • 3.579545 MHz for NTSC, 3.546893 MHz for PAL
  • Main RAM: 16 kbit (2 kB)
  • Video RAM: 128 kbit (16 kB)
  • Video processor: Texas Instruments TMS9928A
    • 256×192 resolution
    • 32 sprites
    • 16 colors
  • Sound: Texas Instruments SN76489
    • 4-channel mono sound
    • 3 sound generators, 4 octaves each, 1 white noise generator
  • Ports:
    • 1 cartridge
    • 1 DIN composite video/audio (SC-3000 only)
    • 1 RF out
    • 1-2 joystick (1 port for SG-1000, 2 for SG-1000 II and SC-3000)
    • 1 expansion parallel bus (used for SK-1100 keyboard and FM Sound Unit; (SK-1100)SG-1000 and SG-1000 II and Sega MarkIII / (FM Sound Unit)Sega MarkIII only )
    • 1 cassette (SC-3000 and SK-1100 keyboard)
    • 1 printer (SC-3000 and SK-1100 keyboard

Sega SG-1000 games