30 Sep
2002
30 Sep
'02
5:49 a.m.
Ok, so replaying to my own email is bed form and all, but a chip
collector has a 1801 chipset for sale, and
is claiming its the old set for sale anywhere. He's asking $1,500.
I, on the other hand, will claim to be sane.
Bob Shannon wrote:
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)