13 Dec
2005
13 Dec
'05
2:17 a.m.
Subject: Re: PDP-11/73 booting!
From: Pete Turnbull <pete at dunnington.plus.com>
Date: Tue, 13 Dec 2005 00:10:56 +0000 (GMT)
To: "General Discussion: On-Topic and Off-Topic Posts"<cctalk at
classiccmp.org>
On Dec 12 2005, 18:01, Allison wrote:
I did say 73B didn't I? There were two different J11 cards, I am using
the M8190 KDJ11-B which is Q22. However there is a later J11 that uses
the PMI memory. I have memory for that one but not the CPU.
I have every Qbus PDP-11 from the LSI-11/03 through the 11/73.
Here in the greater Maynard area we get to see more of the bits that DEC
sold. Then again I got the option during the great bleed to purchase my
underdesk systems for a token amount as we all left that facility. Many
others did as well.
Allison
uVAX-II and 11/73B need/require over the top.
11/23B (and 11/73A)
is strictly Q22. I happen to have the earlier non-pmi 11/73.
And of course the uVAXII.
11/73 doesn't need over-the-top and has no provision for it. As an
11/73 it's supposed to be used with normal QBus memory, but all will
work with PMI memory (a la 11/83, in fact they're the same board).