Set of mystery DEC boards: who can help me identifying these?

[Rod Smallwood]

On 18/06/2016 06:32, P Gebhardt wrote:
> Hello all,
>
>> I recently got a bunch of boards from somebody who was either not able to tell me where they were from.
>> The boards seem to be unibus-based with numbers starting with X. I neither came across these before, nor could find any information in the web about it:
>>
>> Type, P/N     , Description
>> X029, 5013132B, AUC interconnect
>> X022, 5012197C, unibuswindow
>> X021, 5012181C, CD ROM control (did that ever exist for unibus?)
>> X020, 5012180B, data path
>>
>> Two 16K mos memory modules M7847 came with the set.
>>
>
> Thanks to everybody who tried to help figuring out from what installation these DEC boards with Unibus-type connecction are. I'm somehow amazed that there seem to be some board types from DEC around that seem pretty much unknown. I also didn't find any information in the DEC part number catalogs on bitsavers. I confirm that the X-type numbers (x020, X029 etc) are found on the metal etches of the boards.
>
> Anyway, I will keep the photos of the boards at the below link. Maybe somebody who steps over it someday can tell us what these boards are from :)
>
>
> http://www.digitalheritage.de/other/dec_mystery_boards/
>
> Thanks again to the list for your help so far on this,
> Pierre
*
Here's a ref to a unibus window But  they are quad modules

Digital-pdp11 Peripherals Handbook (1975*) ... *Digital* to Analog 
Subsystem, ... *UNIBUS* Link, DA11-B. *UNIBUS Window*, DA11-F.