2 Aug
1998
2 Aug
'98
3:53 p.m.
Here is a snippet I recently posted on comp.sys.dec.micro and a few
other newsgroups asking for identification:
1) 2 dual-height boards, connected by 40-conductor cable
a) board 1: labelled ACC MDMA 6800043
contains 4 AM2901PC bit-sliced processors
11 PROMs (20-pin DIPs)
1 bank of wire-wrap jumpers
b) board 2: labelled ACC X0/1822 6800044
4 PROMs (20-pin DIPs)
5 LEDs
1 26-pin external connector
3 banks of wire-wrap jumpers
Nobody responed. Thanks for answering my question! Want some more
cards?
Dave
P.S. I suspect that these were also a part of the same system:
2) dual-height board
Corvus Systems 1981
LSI-11 Interface
P/N 40020019 Rev 02
contains 28-pin external connector
3) dual-height board
Corvus Systems 1981
LSI-11 Transporter Omninet
P/N 8169
contains 3-pin external connector
LED
8-position DIP switch
4) dual-height board (2 each)
Corvus Systems 1981
LSI-11 Transporter Omninet
P/N 8010-08032
contains 3-pin external connector
LED
8-position DIP switch
William Donzelli wrote:
I finally took a good look at that new PDP-11/23 I purchased some time
ago. It seems to have some normal looking DEC cards in it (LSI-11/2,
others). It does, however, have an interesting looking card set from
Associated Computer Consultants, called "MDMA" (as far as I can tell). It
appears to be from the mid-1980s. One card contains some sort of engine,
with ROMs and (4) 2901s. The other card contains a bunch of glue and
interface stuff, and has a connection to a big round military type
connector (the modern versions of the Cannon connector) on the back panel
of the chassis marked "IMP".
Being that this computer came from a certain spooky branch of the
U.S., that "IMP" looks awfully suspicious. Could this little DEC box have
been slated for the ARPAnet, but came just a little too late?
All I have is the processor - no drives or OS, so I can not tell much if I
power it up.
William Donzelli
william(a)ans.net