28 Mar
2002
28 Mar
'02
5:16 a.m.
This hex-width board was found sitting in a UNIBUS
backplane. It looks like
it may have more than two PCB layers. The metal handle, where the board
number is usually stamped, is unmarked; no board number is stamped there. On
the front side, top left, is "AD413A MADE IN USA". The top middle had the
"200415-03" handwritten on it, but that has been crossed out by a marker,
and "200850-02" appears beneath it. The top right has "S/N 5781"
handwritten. There are two 50-pin BERG (maybe formatted Pertec) connectors
at the front top. On the back of the board, at the top right, is "MRX42
200255-02", machine printed. A little to the left of that is "3183",
handwritten.
Google has returned nothing. What have I here?
Just a major WAG, but since it says AD413A in one spot it could be an
"Analog to Digital Converter". Though two 50-pin connectors seem an awful
lot for that.
When you say 50-pin the first thing that comes to mind is SCSI, HOWEVER, I
think it's safe to say it's not that based on the chips. There is
something else that uses 50-pin connectors, but I'm to tired to remember.
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |