nice find - now I have a PDP-11/93 question

From: Gooijen H <GOOI_at_oce.nl>
Date: Thu Feb 14 07:24:34 2002

The 11/93 is hardly "classic", but to my DIGITAL collection
it is still a nice addition and I would like to get it running.

I agree with Jerome that the M9047 grant continuity card could
be removed and move all other boards one position 'up', but the
system had the M8047 when I got it, so I left it there.
Perhaps the cooling of the cpu board is better ...

> What do the DL interface connections consist of? I have a set
> from an 11/94 system, but they really don't seem to fit from a
> hardware point of view into a Qbus system, in particular, in a
> BA23 box.

That is exactly what I have. It is an 11/93 in a BA23 box.
I read somewhere that the 11/94 uses a KTJ11 (?) board to bridge
to UNIBUS, and that the 11/94 system comsumes more power.

The rear panel that connects to the M8981 in my BA23 box has the
following parts on it:
+ 8 9-pin D-shape (DE-9) connectors for 8 extra terminals
+ 1 25-pin D-shape (DB25) connector with "CONSOLE" text next to it
+ 2 7-segment displays
+ 1 DIP switch block with 8 switches

The M8981 board has on the front side a 40-pin male header, next
to it are the 8 LEDs followed by a 50-pin male header. Behind the
LEDs is an other DIP switch module.
The 40- and 50-pin headers are connected to the rear panel with 2
flatcables.

I am still looking for the DIP switch positions.
I will gather all info on the 11/93 and put it on my website. Of
course with several pictures of the system.
Several Google searches did not produce much technical detail info.

TIA,

- Henk.
Received on Thu Feb 14 2002 - 07:24:34 GMT