Anyone have a M8340 (EAE) schematic rev.D? Or M8341 rev.D sch?

Paul Anderson useddec at
Thu Mar 5 00:22:04 CST 2015

I've been in touch with Kyle, and can't find my boards. I have 2 sets that
should be here by Friday and will  check the revs as soon as they get here.

I will try to look for prints and fiche by tomorrow night. I plan on
sending a package to Kyle by Friday, express mail. Do either of you have
access to a fiche reader?

If there is anything else I can do let me know.


On Wed, Mar 4, 2015 at 5:23 PM, Stephen Lafferty <steve at> wrote:

> Hi Folks,
> We're trying to get an EAE (extended arithmetic element) board set working
> in a PDP-8/e. It turns out that DEC made changes which render M8340 rev.D
> incompatible with M8341 rev.D. (Both of the boards we have are rev.D,
> sigh.) M8340 rev.D requires at least an M8341 rev.E.
> We would like to modify the boards to be compatible but the only schematic
> of M8340 that we've been able to find is rev.F. So it's difficult to figure
> out what changes are needed.
> If anyone has an M8340 schematic earlier than rev.F or an M8341 rev.D sch,
> that would be a huge help.
> The goal is to get Spacewar! working on the PDP-8/e for the upcoming VCFSE
> show. This version of Spacewar! requires the EAE. We GOTTA get Spacewar!
> working for the PDP-8's 50th! :)  Please help.
> Thanks,
> Steve
> PS: The revision letter can be found in the lower right-hand corner of the
> DEC schematics that I have.

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