How scarce (valuable) is core for the PDP-8?

From: allisonp_at_world.std.com <(allisonp_at_world.std.com)>
Date: Wed Apr 21 14:41:42 1999

> Most of the DEC core planes use a fair number of special-purpose
> transistor arrays (often specially matched) for drivers as well as pulse
> transformers and delay lines. If you look back at alt.sys.pdp8 archives
> (or its mailing-list twin, PDP8-LOVERS) you'll find some suggestions
> for part substitutions and/or rebuild directions.

If your repairing a existing core that is significant. If your doing
something small that just has to work for demo reasons that is not a show
stopper.

> of driving and sensing. There were at least a few implementations of
> S-100 core memory in the mid-70's, and one of them was a S-100 to
> Unibus translator of sorts. (Not to be confused with the IMSAI
> S-100/Unibus shared memory module, which is in several of my IMSAI
> price lists from 1977/1978 but which I believe to be vaporware.)

Byte, kilobaud or interfaceage in the late 70s (76 thru 79) I distinctly
remember an articale with some detail.


I have an advantage... 8E printset and a Electronics engineering caseboot
describing several designs from the late 50s including a code converter
and the Lincoln TX2. There are enough fragments there for me to do
something.

Allison
Received on Wed Apr 21 1999 - 14:41:42 BST