PDP-11/53 jumper doc found

From: Jonathan Engdahl <engdahl_at_cle.ab.com>
Date: Fri Jun 29 07:50:06 2001

I guess there must have been only one copy of the 11/53 CPU
board manual left in the world, and Giorgio Ungarelli had it in
Switzerland. He sent me a copy, and I will eventually get this
information up on my web site.

It is a supplement to the MicroPDP-11/73 manual. It documents
the baud rate, boot, and halt option jumpers, etc. for the older
version of the KDJ11-DA, the one with only .5 meg of RAM on
board, and the CPU in the center. I've got one of these boards,
and a couple of the newer ones (KDJ11-SD). I'm sure that once we
know what the jumpers do, we can figure out where they got moved
on the newer boards.

I think the reason the board won't boot when you don't have a
front panel is that the boot option inputs float to "15", which
is "manufaturing test loop".

Jonathan Engdahl             Rockwell Automation
Principal Research Engineer  24800 Tungsten Road
Advanced Technology          Euclid, OH 44117  USA
Euclid Labs                  http://users.safeaccess.com/engdahl
Received on Fri Jun 29 2001 - 07:50:06 BST

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