2 Mar
2009
2 Mar
'09
11:09 a.m.
Hi,
Before I do it - I thought I should ask :) Can I use a
M9302 as a UNIBUS terminator in a PDP 11/35 or 11/40.
The manual mentions a M930 which I don't have, but I do
have the M9302 which looks a bit more involved (has
some ICs.
The M9302 was from a 11/34 which is a later generation.
Having said that, the 11/35 does work without the
terminator - although I cant see a terminator on
the system.
Thanks
Ian.
2 Mar
2 Mar
12:09 p.m.
It should work although I typically use M9312's since they have the
bootstrap ROMs.
TTFN - Guy
On Mar 2, 2009, at 8:09 AM, silvercreekvalley wrote:
Hi,
Before I do it - I thought I should ask :) Can I use a
M9302 as a UNIBUS terminator in a PDP 11/35 or 11/40.
The manual mentions a M930 which I don't have, but I do
have the M9302 which looks a bit more involved (has
some ICs.
The M9302 was from a 11/34 which is a later generation.
Having said that, the 11/35 does work without the
terminator - although I cant see a terminator on
the system.
Thanks
Ian.
2:23 p.m.
Date: Mon, 2 Mar 2009 08:09:19 -0800
From: silvercreekvalley at yahoo.com
To: cctalk at classiccmp.org
Subject: Can I use a M9302 with a PDP 11/35?
Hi,
Before I do it - I thought I should ask :) Can I use a
M9302 as a UNIBUS terminator in a PDP 11/35 or 11/40.
The manual mentions a M930 which I don't have, but I do
have the M9302 which looks a bit more involved (has
some ICs.
The M9302 was from a 11/34 which is a later generation.
Having said that, the 11/35 does work without the
terminator - although I cant see a terminator on
the system.
Thanks
Ian.
Hi Ian,
I checked my notes (the machines are a bit difficult to
reach, I am moving in 3 weeks). In my notes, I have the
M930 as terminator. The M9302 is for the 11/34, because
of the SACK circuitry. Just a few weeks ago Tony wrote
a good explanation on the termination subject.
I don't know if you can put the M9302 in the 11/35 ...
If you are in the UK (which I seem to remember, I can
send you an M930 for shipping costs. If you are in the
USA, I can do that too, but is more expensive, and
perhaps somebody in the USA has one M930 for you.
- Henk, PA8PDP
(The Netherlands)
4 Mar
4 Mar
4:25 a.m.
On Mon, 2 Mar 2009, Henk Gooijen wrote:
The M9302 is a direct replacement for the M930 for Unibus. I have one in
my 11/45 and it just do its job. Of course you can't put the M9302 in an
RK05 as terminator, there you really need the M930.
Instead of the M9302 you could also use a M9312 bootstrap/terminator card.
Christian
Before I do it
- I thought I should ask :) Can I use a
M9302 as a UNIBUS terminator in a PDP 11/35 or 11/40.
I don't know if you can put the M9302 in the 11/35 ...
2 Mar
2 Mar
2:32 p.m.
Date: Mon, 2 Mar 2009 08:09:19 -0800
From: silvercreekvalley at yahoo.com
To: cctalk at classiccmp.org
Subject: Can I use a M9302 with a PDP 11/35?
Hi,
Before I do it - I thought I should ask :) Can I use a
M9302 as a UNIBUS terminator in a PDP 11/35 or 11/40.
The manual mentions a M930 which I don't have, but I do
have the M9302 which looks a bit more involved (has
some ICs.
The M9302 was from a 11/34 which is a later generation.
Having said that, the 11/35 does work without the
terminator - although I cant see a terminator on
the system.
Thanks
Ian.
A lightly loaded system may run without the terminator,
especially if no "DMA" device (such as the RL11) is on
the bus. The start of the bus is terminated on the CPU,
the other end is normally done by the M930 (in the /35
or /40). I have the M930 in 2 variations. One with
discrete resistors, the other with the resistors in a
modern DIL package.
Needless to say that the machine will run better (read:
less chance of hang-ups) with a terminator.
- Henk, PA8PDP
5620
days inactive
5622
days old
4 comments
4 participants
participants (4)
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