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

[Mike Ross]

Are the X-numbers stamped on the metal handles? Damn... that rings a
bell... I'm sure I've seen boards from a big DEC system with
four-digit X numbers on the handles but I can't remember which! A big
VAX or something... or was it an 11/70 memory system or something?

Or a KL or KS 10... are they standard hex Unibus size?

Mike

On Sun, May 29, 2016 at 8:29 AM, Paul Anderson <useddec at gmail.com> wrote:
> the 50xxxxx number with the letter behind it could be a dec board number.
>
> The 50 class could be the artwork, and the letter the board rev.  If that
> is the case, there is probably a 54- class on the other side of the board
> one number higher. The 54  number is the board with components, and can be
> tracked down, but not easily.
>
> They could have been renamed by another company.
>
> Any other print in the etch?
>
> Any pictures?
>
>
> On Sat, May 28, 2016 at 5:51 AM, P Gebhardt <p.gebhardt at ymail.com> wrote:
>
>> Hello list,
>>
>> 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.
>>
>>
>> No backplane, unfortunately.
>> Any hints about the type of system and application these boards were for?
>> Many thanks for any pointers.
>>
>> Wish a nice weekend to all of you,
>> Pierre
>>
>>
>>
>> -------------------------------------------------------------------------------
>>
>> Pierre's collection of classic computers moved to:
>> http://www.digitalheritage.de
>>



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