Atari 400/800 CPU(6502C Sally Version) Printed Circuit Board Tested with all CPU board parts including the GTIA chip USA NTSC. GTIA C014805(NTSC), ANTIC C012996D(USA), CPU 6502C C014806. Made and assembled by Atari Printed Circuit Board(PCB). We are selling 3 versions of the US NTSC CPU board. The version in this auction uses the 6502C CPU and has Gold edge connector fingers. We have another 1979 version with 6502 CPU, CTIA(not GTIA) and foil edge connector fingers(collectors version) and a third with a 6502 CPU and Gold edge connector fingers which was a later production version but 100% interchange with the one in this auction.. We bought these direct from Atari. The CPU PCB is just one of the several PCB inside of an Atari 400/800. See picture link below that shows other boards that are sold on our web site and in other auctions. Include GTIA Chip. Atari 400/800 CPU(6502C) Printed Circuit Board Tested with all CPU board parts including the GTIA/USA NTSC chip. Made and assembled by Atari Printed Circuit Board(PCB).