Mystery LSI-11 board

[Paul Koning]

>>>>> "tom" == tom ponsford <tponsford at theriver.com> writes:

 tom> I got a LSI-11 (11/03) the other day that is pretty much intact,
 tom> but will need some work.  Included with the chassis, backplane
 tom> and power-supply, were the following cards ...

 tom> I do believe the mystery card at the bottom is in fact a
 tom> terminator/bootstrap?? (TEV11/REV11) But there are no numbers on
 tom> the handles or on the board.  The plastic handles are grey and
 tom> are DEC branded. The board has a 40 pin connector.  Having never
 tom> seen a TEV11 or aa REV11 and finding little by googling, I'm
 tom> wonder if anybody out there can enlighten me!!

 tom> I took a picture and excuse me for the size, but I wanted to
 tom> include as much detail as possible!

 tom> http://personal.riverusers.com/~dponsford/qbus.html

You have bad html (local filename reference for the photos); pasting
the name part into the rest of the URL gets the pictures.

That's definitely not a DEC board.  For one thing, a Qbus board
wouldn't have gray handles, it would have maroon handles (that's what
the M in board part numbers refers to).

Second, the rats nest of wires on the back goes way beyond anything
that DEC would ship (far too many wires) and the "slap them anywhere"
routing is much sloppier than the rework I have seen coming out of
DEC.  It's just barely possible you might see this in a prototype,
though almost always prototypes would be done a lot more cleanly than
that.  But for sure you would not see that in a production board.

       paul