Mystery board

[Allison]

>
>Subject: Re: Mystery board
>   From: joe heck <trash3 at splab.cas.neu.edu>
>   Date: Sun, 08 May 2005 07:37:36 -0400
>     To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>Well, I cannot tell exactly what it is, but there are lots of clues:
>
>Not Qbus, it's a hex board. Well, I have actually seen some custom 
>backplanes that are six wide and use qbus cards, but that is pretty rare.
>
>Very few external connectors that I can see.  Probably not disk/tape.
>
>At least three types of memory, although I cannot read the numbers.  It 
>looks like a bank of 8 dynamic memory chips, then three static ram and 
>finally an EPROM.  I'll bet on the top edge is the Z80, but the I/O chip 
>next to it (if that is what it is) would give some more clues.
>
>It would be good to see if the crystal is divided for various baud 
>rates, and if the connector on top has 8 bits or is serial.  the missing 
>chip on the upper left might be serial i/o.  best guess, some sort of 
>intelligent slave serial communications I/O processor.
>
>But it's just a guess.
>
>Joe Heck
>
>Charles wrote:
>
>> I have an unknown hex-height board which was included in a
>> miscellaneous lot of PDP-8A boards I recently purchased. But there
>> is no manufacturer's info except what looks like "K-3VO" in the
>> lower left corner, where there is a strange looking clamp-on
>> connector. Nothing is engraved on the metal "handles". There is a
>> Mostek 3880 (Z80 CPU) at the upper right, too. Date codes on all
>> the chips are '82 - '83.
>> 
>> Here is a link to a picture of it:
>> http://img2.imageweb.info/img2/6gj14927.jpg
>> 
>> and a closeup:
>> http://img2.imageweb.info/img2/aqw15714.jpg
>> 
>> Anyone know what this board is?
>> 
>> thanks
>> Charles
>> 

Another SWAG is a cp/m board for a UNIBUS VAX class system.
Actually got to use one once.

Allison