Kearney & Trecker Core memory, may be PDP8

Noel Chiappa jnc at
Tue Nov 11 23:12:40 CST 2014

    > From: Paul Anderson

    > 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.

That would be really useful.

If I had to bet, I'd go with the 8: DEC SPC/MUD memory boards often have CA1
jumpered to CB1 (NPG), and I don't see that here. And the way CC1 is ganged
to CF1 to CT1 is very odd - CC1 is Parity A in an SPC/MUD slot. (Yes, it
could be for a specially wired system unit - but those don't usually use hex
cards.) And then there are a number of different kinds of component (e.g. the
transistors in the cans, TO-18 I think?) which seem to be in multiples of 12.

Too bad there's no picture of the edge of the handles to give us an M-number!


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