The SG-1000 was released simultaneously with a home computer version with almost identical hardware, the SC-3000. It seems to have been cloned from the ColecoVision hardware.
There are 3 models, quite similar in specs:
CPU: Zilog Z80 @ 3.58 MHz
GPU: Texas Instruments TMS9918
Audio: Texas Instruments SN76489
Specs:
Memory : 1 KB RAM Resolution : 256x192 Colors : 15-color fixed palette Tiles : 8x8 pixel tiles Sprites : 32 single-color sprites, max 4 per horizontal line Audio : 3 square waves, 1 noise
Borderline Sega SG1000 1983 1 video 1 logs C-So! Compile SG1000 1985 1 video 2 logs Champion Boxing Sega SG1000 1984 1 video 1 logs Girl's Garden Sega SG1000 1985 2 videos 5 logs Golgo 13 Sega SG1000 1984 1 video 1 logs Gulkave Compile SG1000 1986 1 video 3 logs Guzzler Tehkan SG1000 1983 1 video 2 logs Hustle Chumy Compile SG1000 1984 1 video 3 logs Ninja Princess Sega SG1000 1986 1 video 3 logs Pacar Sega SG1000 1983 1 video 1 logs Rock n' Bolt Action Graphics SG1000 1985 1 video 1 logs Safari Hunting Sega SG1000 1983 1 video 1 logs Safari Race Sega SG1000 1984 1 video 1 logs Sega Flipper Sega SG1000 1983 1 logs Sega-Galaga Sega SG1000 1984 1 video 3 logs Sindbad Mystery Sega SG1000 1983 1 video 1 logs Space Armor Tsukuda Original SG1000 1984 1 video 1 logs Space Invaders Taito SG1000 1985 1 video 1 logs Star Force Tehkan SG1000 1985 1 logs
ocdgamer.rb:336:output_game_list(
19 games, mode:list, tag id:88, sortby:title,
url_arg_prefix:, output_list_selection:true)
execution time:
output_game_list: 0.40s
get_all_entries : 0.23s
developer : 0.07s
system : 0.00s
entries : 0.10s