> On Feb 26, 2022, at 2:19 AM, Noel Chiappa via cctalk
> wrote:
> So, either (console halt, or a HALT instruction) will cause the identical
> response in the processor; see Section 4.10.3 "Halt Grant Requests": the CPU
> sends HLT GRANT to the console, which returns SACK. As long as SACK is
>
>> (I have yet to check and see if the KY11-LB asserts SACK if the CPU
>> halts on its own accord - probably 'yes', but that's a project for
tomorrow.)
Yes, it does. I toggled in the following program:
5000
5200
776
0
(what, you all can't program a PDP-11 in octal? :-) and hit
Sent: Friday, February 25, 2022 2:29 AM
To: Noel Chiappa ; General Discussion: On-Topic and
Off-Topic Posts
Subject: Re: Is The M9312 Boot Module Essential?
What about the M9300 board? Do you have an idea what the purpose is of that
card? It look a bit like a M9302 but with more logic
> From: Mattis Lind
> What about the M9300 board? Do you have an idea what the purpose is of
> that card?
Yes, that one's well-documented and understood.
It's intended for use on the 'B' UNIBUS of the RH11-AB, in deployment
configuratons where that UNIBUS is in use, but there's no
> -Original Message-
> From: cctalk On Behalf Of Noel Chiappa via
cctalk
> Sent: Monday, February 21, 2022 10:19 AM
> To: cctalk@classiccmp.org
> Cc: j...@mercury.lcs.mit.edu
> Subject: Re: Is The M9312 Boot Module Essential?
>...
> Since the M9302 appears in EK-
What about the M9300 board? Do you have an idea what the purpose is of that
card? It look a bit like a M9302 but with more logic on it and a few
jumpers and a LED. It also have a delay line and a monostable flip-flop.
Here is a photo of a (dusty) M9300:
> On Feb 24, 2022, at 8:24 PM, Noel Chiappa via cctalk
> wrote:
> … at first I thought that maybe you were thinking of the M7850 Parity
> Controller (which is
> actually a memory option, not KD11-E/EA specific; more below), but that's a
> dual card.
Yes, I was thinking of the M7850, but I
First, a minor correction:
> the M8264 Sack Timeout module ... there's next to nothing in print
> about them
There is also some coverage in EK-KD11E-TM-001, at: Section 4.7.2.4 "M8264
NO-SACK Timeout Module" (pg. 4-41, pg. 87 of the PDF), which I found while
looking for parity stuff
> On Feb 21, 2022, at 10:29 AM, Fritz Mueller wrote:
> Also, in taking a look this morning at the M9302 schematic around page 70 in
> the commonly available 11/34 engineering drawings set (rev B, Sep 76), there
> appears to be a mistake! The output of the SACK turnaround circuit is
>
>> From: Fritz Mueller
>> I think you are thinking of the M9302, Noel: a far-side terminator card
>> with integrated SACK turnaround?
> On Feb 21, 2022, at 7:19 AM, Noel Chiappa via cctalk
> wrote:
> No; the M8264 Sack Timeout module. What's an M8264, you say? ...
Ah, quite interesting, didn’t
>> On Feb 19, 2022, at 10:51 AM, Noel Chiappa wrote:
>> The -11/34 (not the /34A) has something unusual for grant timeouts,
>> but I forget the details. I'll look it up.
And here it is...
> From: Fritz Mueller
> I think you are thinking of the M9302, Noel: a far-side
> Neither the KD11-E nor the KD11-EA has built-in termination and pull-ups
> ... I haven't yet checked, but it may be the only PDP-11 CPU of which
> that is true
Also the KD11-D of the -11/04.
Noel
So, I've made what I think is a significant discovery about the -11/34:
> 1B _is_ necessary, but can be provided anywhere on the bus; most
> UNIBUS/QBUS CPU [pullups] have it built in
I was wrong. Neither the KD11-E nor the KD11-EA has built-in termination and
pull-ups (those are both
On Sat, Feb 19, 2022 at 4:40 PM Fritz Mueller via cctalk
wrote:
> > On Feb 19, 2022, at 12:11 PM, Fritz Mueller wrote:
> A few additional details, in case it is helpful:
>
> IIRC, the 11/34 doesn’t have SACK timeout implemented in the CPU cards (the
> /34A did add this, however.) So without an
> On Feb 19, 2022, at 10:51 AM, Noel Chiappa via cctalk
> wrote:
> The -11/34 (not the /34A) has something unusual for grant timeouts, but I
> forget the details. I'll look it up.
> On Feb 19, 2022, at 12:11 PM, Fritz Mueller wrote:
> I just did an 11/34 restoration last year, so this is fresh
Here is how I used mine on a PDP 11/05. Literally right now.
1. Boot up the system and use the front panel to load 165020(8)
2. Run from this address
3. My system is set to communicate with a Teletype, so it comes to life
and prints the status of the CPU registers to the teletype
4. I type in
> On Feb 19, 2022, at 10:51 AM, Noel Chiappa via cctalk
> wrote:
> The -11/34 (not the /34A) has something unusual for grant timeouts, but I
> forget the details. I'll look it up.
I just did an 11/34 restoration last year, so this is fresh in mind — I think
you are thinking of the M9302,
> From: Jay Jaeger
> SACK turnaround capability so that the machine doesn't hang accessing
> an address that doesn't respond on the UNIBUS.
Umm, I think you're mixing up i) grant timeouts and ii) master-slave
timeouts.
All PDP-11 CPUs have master-slave timeout handling; after a
Speaking of which, what does the console rom "DO"? Is it like the
interactive boot from a pdp11/23+ or better where you can type in the
device name, run little memory diagnostics and such?
I recall that with the real boot chips on a unibus 11/34 you could just
jump to the location of the ROM
: Is The M9312 Boot Module Essential?
You need some way to initialize the system to the peripheral that contains
the.OS media. The m9312 is a general purpose co ntroller for that purpose.
There are roms that install on the 9312 for almost any drive hardware. When
you get a system that comes
.
Thanks
Rob
-Original Message-
From: cctalk On Behalf Of Noel Chiappa via
cctalk
Sent: 19 February 2022 09:18
To: cctalk@classiccmp.org
Cc: j...@mercury.lcs.mit.edu
Subject: Re: Is The M9312 Boot Module Essential?
> From: Rob Jarratt
> is the M9312 essential to ev
> From: Rob Jarratt
> I suspect some of the other cards that were in the machine might do the
> necessary termination stuff.
Different answers for each part of the functionality.
1A and 1C fundamentally have be at the end of the bus, physically. So,
unlikely; since _other_ cards
f Noel Chiappa via
> cctalk
> Sent: 19 February 2022 09:18
> To: cctalk@classiccmp.org
> Cc: j...@mercury.lcs.mit.edu
> Subject: Re: Is The M9312 Boot Module Essential?
>
> > From: Rob Jarratt
>
> > is the M9312 essential to ever get this machine
there?
Regards
Rob
From: Bill Degnan
Sent: 19 February 2022 08:29
To: r...@jarratt.me.uk; Rob Jarratt ; General
Discussion: On-Topic and Off-Topic Posts
Subject: Re: Is The M9312 Boot Module Essential?
You need some way to initialize the system to the peripheral that contains
the.OS media
> From: Rob Jarratt
> is the M9312 essential to ever get this machine to boot up an operating
> system?
Interesting question. I don't have my -11/24 running yet, so this reply is
theoretical, not tried in practice (and as we all know, the difference
between theory and practice is
You need some way to initialize the system to the peripheral that contains
the.OS media. The m9312 is a general purpose co ntroller for that
purpose. There are roms that install on the 9312 for almost any drive
hardware. When you get a system that comes with an M9312, it will have the
I have a PDP-11/24. I have never got very far with it because of power
supply problems which I am hopeful will be resolved soon. Looking at the
technical manual, it describes an M9312 bootstrap/terminator module. The
machine did not come with one of these.
I am not sure how the machine could
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