Help ID'ing a PDP-8/A Omnibus board

systems_glitch systems.glitch at
Thu Aug 8 11:16:09 CDT 2019

>From the layout and text font, I'd guess Sundstrand (CNC machine company)
but usually they put their logo/name on boards. I only have Unibus
Sundstrand boards in the shop at the moment, but none of them have that B
logo. Wouldn't be surprised if the B logo is from whoever made the boards,
as in the actual board fab house.


On Thu, Aug 8, 2019 at 12:07 PM Josh Dersch via cctalk <
cctalk at> wrote:

> Hey all --
> Got a PDP-8/A at VCFW this past weekend.  It's an OEM model sans programmer
> panel and was apparently used in a CNC application.  It contains a board
> I'm trying to ID.  It says "PDP-8/A CONSOLE ROM" on it and has no other
> identifying marks other than a logo on the back.  See the pictures here:
> <>
> None of the braintrust at VCF were able to identify this mark.  I'd guess
> that the board provides a simple ODT interface or something similar.  The
> three ICs in the upper-left with the handwritten labels are 82S129 256x4
> bipolar PROMs.  They're not socketed so I haven't read them in yet.  The
> 8/A's gonna need some TLC before I dare power it on...
> I'm mostly curious if anyone can ID the logo -- it would be interesting to
> know who made this thing.
> Thanks!
> Josh

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