Any chance you can post a scan of this board? I'd like to compare it to some of
the ones from my Cosmac Development System -- scans at
http://home.earthlink.net/~msmith6020/Cosmac/
-W
> I've just found something rather rare, and I'm willing to part with it,
> so...
>
> For Sale or Trade (Not listed on eBay!):
>
> An RCA CDP 1801 CPU board, New Old Stock, with matching edge-card
> connector. The PCB artwork is labled "RCA GPA 3903822/02 PCA 47-5", and
> "3901822".
>
> This is a 4.25 inch by 2.75 inch (including fingers) blue-colored PCB
> with a 40-pin CDP1801UD data path chip and its
> associated 28-pin SSTC TA6890W control store ROM, along with some
> passive support components. The IC's are
> in white ceramic with gold covers. Even the Beckman 22K resistor DIP is
> in a white ceramic package. PCB traces are tinned over a blue
> substrate, with a 44-pin gold edge finger connector.
>
> The mating connector is a Sullins ETM22DSEH in a matching blue color,
> for some reason (because is looks really cool?).
>
> This two-chip CPU is a very early example of the RCA COSMAC CPU design
> built prior to the much more common CDP1802 single-chip processor.
> Dates codes are 7539 for the data path, and 7525 for the SSTC chip.
> Condition is absolutely mint, NOS-condition, but untested. No
> documentation, but I ~MAY~ be able to find something on this board, just
> don't count on it.
>
> I'll also include a pair of vintage HP hexidecimal displays exactly like
> those used on the original ELF project, to make this combo the starting
> point for a really special ELF project.
>
> (Some ceramic 1852's may also be available)
>
>
>
>
>
Received on Tue Oct 01 2002 - 23:32:00 BST