Kearney & Trecker Core memory, may be PDP8

Paul Anderson useddec at
Tue Nov 11 22:01:55 CST 2014

The first board is definitely a DEC  core board.  If it will help anyone I
can pull a MM8-A and MM11-D and compare them to the pic to see which.

I have hundreds of DEC compatible boards here including Warner Swaysea,
White/ Sunstrand, K/T, G/L, etc. if anyone of someone interested in them.

BTW, I have a few people sorting for me and they are making progress.

On Tue, Nov 11, 2014 at 9:18 PM, Johnny Billquist <bqt at> wrote:

> On 2014-11-12 04:00, Jon Elson wrote:
>> On 11/11/2014 07:33 PM, jwsmobile wrote:
>>> I can't tell for sure, but this auction may be for  PDP8 core board.
>>>  Boy, that SURE looks like PDP-11 memory, not PDP-8.
>> The cast metal stiffener I think came in at least very late in the game
>> for the PDP-8.  PDP-8s usually had the colored plastic pull handles.
> The fact that the board have four edge connectors and not six totally
> excludes PDP-11. As for hex size with metal handles, that was used on the
> 8/A. (Which indeed is late in the PDP-8 game, but then again, it wasn't
> until the 8/A that you saw hex boards either, so if this would be for a
> PDP-8, it would have to be an 8/A, since no other model fits the hex
> boards.)
> But this is not 8/A core memory either, since those actually have all six
> connectors on the board, even if only a few signals were used on connector
> 5, and no signals were used on 6.
> But since this isn't even DEC stuff, it could still possibly have been
> something for a PDP-8. PDP-11 is still out of the question because of the
> four connectors.
>         Johnny
> --
> Johnny Billquist                  || "I'm on a bus
>                                   ||  on a psychedelic trip
> email: bqt at             ||  Reading murder books
> pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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