28 Mar
2002
28 Mar
'02
8:01 a.m.
On Thu, 28 Mar 2002, Zane H. Healy wrote:
Eight inch floppy disk drive.
- don
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 |
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