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

From: Jerome Fine <jhfine_at_idirect.com>
Date: Thu Feb 14 19:03:39 2002

>Gooijen H wrote:

> 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.

Jerome Fine replies:

Actually, I believe the 11/93 was first released before 1992,
so at this point, it would be - can't be sure without checking,
but it certainly feels like it.

> 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 ...

Might be - I don't think a CPU board runs hot.

> > 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.

Does not seem like it. Juts that the hardware for a 1//94 does not fit
into a BA23.

> 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.

I am supposed to be receiving an 11/93 cabinet kit this weekend,
but that was said before. A manual is supposed to be coming as
well. I will let you know. The real problem now is that I can
run PDP-11 instructions at 10 times the speed of an 11/93,
so I no longer feel that much of a need to put the system together.

Funny how we can become spoiled.

Sincerely yours,

Jerome Fine
Received on Thu Feb 14 2002 - 19:03:39 GMT