Pics of the industrial PDP stuff + unknown ones

[Ethan Dicks]

On 11/16/09, Ed Groenenberg <quapla at xs4all.nl> wrote:
> I also have placed a picture of an ACT board I cannot identify.
> Anybody able to tell me what it is?
>
> The url is http://tinyurl.com/yzqknd7

Just based on the shape and the presence of numerous DS8641s top and
bottom, I'd say that looks like a Qniverter or Univerter-type bus
adapter board.  I'd check the locations of power/ground and groupings
of signals to the DS8641s by the upper edge socket, but you probably
plug this board into a Qbus box and run a BC11 cable to a DD11CK or
DD11DK to use Unibus peripherals in your Qbus machine.  It's possible
it's some other specific configuration (since DEC _did_ make a
hex-height Qbus backplane for mounting an IBV11 in a BA11 cab to use
it with a Unibus processor), but those sorts of bus adapters tend to
use a different cabling arrangement than a BC11.

I am unfamiliar with the ACT name, but that's my opinion based on the
board shape and chips present.

-ethan