In the "I have my suspicions" dept.

From: David C. Jenner <djenner_at_halcyon.com>
Date: Sun Aug 2 19:53:20 1998

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_at_ans.net
Received on Sun Aug 02 1998 - 19:53:20 BST