8 Sep
2010
8 Sep
'10
7:05 a.m.
On 9/8/10, Marvin Johnston <marvin at west.net> wrote:
I just found a couple of standard bus cards marked
"CDP 18S 604B" and no
real idea what they are. A Google search gave 3 results, all in German
from their edition of Computer Weekly dated 1981.
I googled for the part number with no spaces and found a reference to
it on the cosmacelf Yahoo Group, including a link to the original
docs.
One looks to be in the original packaging, and the
other looks used with
an expansion PROM board.
Nice.
Unfortunately, no docs...
<http://groups.yahoo.com/group/cosmacelf/files/CDP18S604B.pdf>
(you will probably have to join the cosmacelf Yahoo Group to get the file)
Anyone have any idea what these things are?
RCA 1802 SBCs. More I/O than an Elf, but, AFAIK, meant for embedded
applications more than general-purpose computing. RCA had a 44-pin
cage for larger systems.
I have a 3rd-party board that's mostly compatible with this, but not a
"real" RCA board. Mine has more room for RAM/ROM sockets, but no
prototype area, for instance. Same 44-pin connector on one end and
same parallel I/O connector on the other.
-ethan