Odd Q-Bus questions 18/22bit

From: Zane H. Healy <healyzh_at_ix.netcom.com>
Date: Sat Aug 15 22:17:20 1998

In looking at the PDP-11/03's that I got today, one thing is very obvious.
They've got disk controllers that are useless to me. The controllers are
from a company called 'Xebec', and it is my understanding that they went to
special drives.

Now I know that the /03's are SLOW, however, they're in a nice little case
so I'm looking at them thinking, hmmmm. I wonder if I can put a DILOG
floppy controller I've got in one of them. What I'm wondering is do such
things as drive controllers care about the 18bit / 22bit differences of the
backplane? At least it's my understanding that a PDP-11/03 has a 18bit
backplane.

On a separate note, I ended up with 3 more VT100's with this, and one of
them had a loose top, so I took a look inside, and noticed that it has what
looks to be a Q-Bus backplane. What is the story here? Can I put some
cards in here and have a working PDP-11? (I know figure the odds) I took
a look through the VT100 tech manual I got today, but couldn't find
anything about the backplane.

On a positive note, I've finally got some documentation, so maybe I'll
quite asking so many stupid questions. :^) On that note, I think I'll
send this, and spend some time trying to find some shelf space for said
documentation :^(

                        Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh_at_ix.netcom.com (primary) | Linux Enthusiast |
| healyzh_at_holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
| http://www.dragonfire.net/~healyzh/ |
Received on Sat Aug 15 1998 - 22:17:20 BST

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