Real PDP11 model question

From: Pete Turnbull <>
Date: Mon Sep 20 02:23:34 2004

On Sep 19 2004, 21:14, Jerome H. Fine wrote:

> As far as I understand, some backplanes that handle the PDP-11/03
> can't handle the 11/23 or the 11/73. But some might be able to
> handle all 3 CPU types. Are you aware of this problem and which
> backplanes are in which category?

All I can think of is the obvious -- that you couldn't put some of the
quad-height devices in a serpentine backplane, but that isn't an 11/03
vs. 11/23 issue. There are backplanes (H9273-A and H9275-A) where you
are supposed to change jumpers. Unless someone has meant that the
11/03 is 16-bit and the others are 22-bit, but they still work in
18-bit backplanes.

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Mon Sep 20 2004 - 02:23:34 BST

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