The Color Graphics Adapter Redux board is a more or less faithful clone of the original IBM CGA, based on the original schematics
hkzlab
46
A homebrew Sega SG-1000, with an eye towards SC-3000 compatibility
barbeque
25
fabiodl
8
Recreation of early Dragon 32 mainboard
jimbro1000
8
Clone of the Board of ROM + RTC for Sinclair QL Computer
alvaroalea
4
Figuring out the schematic of PC110's mainboard
ahmadexp
4
jimbro1000
3
A trainer board for digital electronics
RetroStack
1