From Sega Retro
The SC-5000 was an unreleased computer platform announced alongside the SC-3000 by Sega in 1983. Not much was known, other than it was shown in prototype form at the 1983 Micom Show and was planned to have hardware specifications on par with NEC's PC-8800 series. Presumably it was scrapped in favor of the SC-3000H.
|Sega SG-1000 Hardware|
|SG-1000 Variations||SG-1000 | SG-1000 II | SC-3000 | SC-5000 | Othello Multivision | SD-G5 | Arcade|
|Add-ons||Super Control Station SF-7000 | 4 Color Plotter Printer | Data Recorder SR-1000 | Sega Keyboard|
|Game Controllers||Joystick (SJ-200) | Joystick (SJ-300) | Joypad (SJ-150) | SJ-151 | Handle Controller | Bike Handle | Sega Graphic Board|
|Misc. Hardware||Card Catcher | JC-100 | SD-80 |Sega Compact Floppy Disk|
|Unlicensed Clones||Dina 2 in one | Fullwis Video Game FR-II|