1 Jul
2018
1 Jul
'18
5:11 a.m.
From: Paul Birkel
Same thing in this case.
The CPU looks to see a PMI signal that is generated by the KTJ11 - no signal
-> 11/83.
My impression is that except for the speed of the J11 (and the crystal), and
whether or not it came with the FPJ11, all four of the M8190 board variants
are otherwise identical. Whether it's a /73, /83 or /84 depends entirely on
whether it has/sees PMI memory and the KTJ11-B UNIBUS converter (and the
correct backplane, for the latter, of course).
The 11/84 is an 11/83 extended by a Unibus interface
to support legacy
peripherals.
It has a special backplane which is mostly UNIBUS slots, with a few QBUS/PMI
slots on the front, and a 'special' slot in the middle into which the UNIBUS
adapter goes.
Noel
1 Jul
1 Jul
6:14 a.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Noel
Chiappa via cctalk
Sent: Sunday, July 01, 2018 8:12 AM
To: cctalk at classiccmp.org
Cc: jnc at mercury.lcs.mit.edu
Subject: Re: DEC FPJ11-AA
From: Paul Birkel
Same thing in this case.
The CPU looks to see a PMI signal that is generated by the KTJ11 - no signal
-> 11/83.
My impression is that except for the speed of the J11 (and the crystal), and
whether or not it came with the FPJ11, all four of the M8190 board variants
are otherwise identical. Whether it's a /73, /83 or /84 depends entirely on
whether it has/sees PMI memory and the KTJ11-B UNIBUS converter (and the
correct backplane, for the latter, of course).
The 11/84 is an 11/83 extended by a Unibus interface
to support legacy
peripherals.
It has a special backplane which is mostly UNIBUS slots, with a few QBUS/PMI
slots on the front, and a 'special' slot in the middle into which the UNIBUS
adapter goes.
Noel
-----
Indeed. As you say WRT the question asked, "same difference" excepting the
Xtal/speed rating. The backplanes, power supplies, enclosures are of course
radically different as they serve different commercial objectives. And as
you say, the -AE ought to work in either environment.
paul
10:14 a.m.
On 07/01/2018 08:11 AM, Noel Chiappa via cctalk wrote:
It has a special backplane which is mostly UNIBUS slots, with a few QBUS/PMI
slots on the front, and a 'special' slot in the middle into which the UNIBUS
adapter goes.
Speaking of PMI....? Anybody have any PMI memory modules they
might let go for less than my first born male child?? I have one
11/93 with 2 Meg and would love to bring it up to full memory.
And then probably run BSD 2.11 and Ultrix-11 on it.? At least
until RSTS/E become Open Source.? :-)
bill
10:45 a.m.
what are the part numbers you are looking for
On Sun, Jul 1, 2018 at 1:14 PM Bill Gunshannon via cctalk <
cctalk at classiccmp.org> wrote:
On 07/01/2018 08:11 AM, Noel Chiappa via cctalk wrote:
It has a special backplane which is mostly UNIBUS slots, with a few
QBUS/PMI
slots on the front, and a 'special' slot
in the middle into which the
UNIBUS
adapter goes.
Speaking of PMI.... Anybody have any PMI memory modules they
might let go for less than my first born male child? I have one
11/93 with 2 Meg and would love to bring it up to full memory.
And then probably run BSD 2.11 and Ultrix-11 on it. At least
until RSTS/E become Open Source. :-)
bill
8:04 p.m.
On Sun, Jul 1, 2018 at 10:14 AM, Bill Gunshannon via cctalk
<cctalk at classiccmp.org> wrote:
Speaking of PMI.... Anybody have any PMI memory modules they
might let go for less than my first born male child? I have one
11/93 with 2 Meg and would love to bring it up to full memory.
And then probably run BSD 2.11 and Ultrix-11 on it. At least
until RSTS/E become Open Source. :-)
Maybe also try jtcomputer. I bought some M8637-E MSV11-JE boards from
their eBay account (conflansrd) a few years back somewhere around the
$50 range if I remember correctly.
They have some listed at $75 on their website. I have no idea if that
is current information or out of date stale information. You'd have to
try sending them an email to find out:
http://www.jtcomputer.com/search.asp?t=k&s=MSV11&page=3
2 Jul
2 Jul
5:26 a.m.
On 01/07/2018 18:14, Bill Gunshannon via cctalk wrote:
Speaking of PMI....? Anybody have any PMI memory
modules they
might let go for less than my first born male child?? I have one
11/93 with 2 Meg and would love to bring it up to full memory.
If you really mean 11/93 (as opposed to, say, 11/83), it would normally
only use its on-board memory. It does work with PMI memory, but might
it not be easier to just add the extra ICs on the CPU board?
--
Pete
Pete Turnbull
6:16 a.m.
On 07/02/2018 08:26 AM, Pete Turnbull via cctalk wrote:
On 01/07/2018 18:14, Bill Gunshannon via cctalk
wrote:
It's an 11/93 all right.? It has 2 meg on the board.? The chips are
surface mount
and even if I could find some I could trust were good (all I saw with a
quick search
were "refurbished" which means taken out of something else!) I am not
sure I would
want to risk working on what I consider a rare find and my best PDP-11.?
Everything
I have found so far says PMI works fine so I would prefer to find a 2meg
or even a
pair of 1 meg PMI boards.? Not looking at commercial resellers because I
have dealt
with them in the past and know I can't afford them.
bill
Speaking of PMI....? Anybody have any PMI memory
modules they
might let go for less than my first born male child?? I have one
11/93 with 2 Meg and would love to bring it up to full memory.
If you really mean 11/93 (as opposed to, say, 11/83), it would
normally only use its on-board memory.? It does work with PMI memory,
but might it not be easier to just add the extra ICs on the CPU board?
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6 comments
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participants (6)
-
bill.gunshannon＠hotmail.com -
billdegnan＠gmail.com -
glen.slick＠gmail.com -
jnc＠mercury.lcs.mit.edu -
pbirkel＠gmail.com -
pete＠dunnington.plus.com