DEC DSSI board? Maybe?
tpeters at mixcom.com
Wed Jun 10 19:19:11 CDT 2009
What is it?
I have an unidentified board, approx 3.75 inches by 4, or about 94mm x 104mm.
It says on the silkscreen, "DSSI DAUGHTER CARD" and "50-21836-01 B1"
There's about 4 chips on it, and some SMD caps & resistors and a big
The main chip has something like 200 pins, on all four sides of the chip,
soldered to the component side of the board, and sporting a tower-style
heat sink apparently cemented to the top of the chip.
There's also 3 each 10-pin SIP resistors next to each other, like
termination r's. And three each 2-pin jumpers marked "4 2 1" - addressing,
obviously. All three are in place = 7.
The two main connectors are a black D-shaped one that makes me thing of
SCSI SCA, with 50 pins. The other is a blue Berg-style, I'm guessing for an
IDC connector on the end of a ribbon cable. The pins that are marked on the
board say "1" and "49" so I'm going to say 50 pins as well, with locking
ears you close to seat the cable and lock it in place.
It was in a Digital Equipment Corp shipping box, one that looks to be the
right width for the board but probably twice as long as it needed to be. It
was in a static bag- the original, from the looks of it. The grainy
photograph on the box doesn't match the board.
It's in perfect shape. On the box someone has scrawled "Single DSSI
controller for 4000's"
Worth anything to anyone?
465. [Philosophy] ". . . a boss who is forced to part a man's hair with a
wrench has failed at some point." Heinlein: Podkayne, quoting her mother,
_Podkayne of Mars_
--... ...-- -.. . -. ----. --.- --.- -...
tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio)
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