Thanks! I might take you up on the offer if this 11/84 memory is
unstable. Meantime I'm trying to figure out just what kind of
performance improvement PMI memory really gives. So far it's looking
like zero when it comes to disk or I/O performance.
Are there benchmarks one can compile for
On 04/23/2020 07:43 PM, Anders Nelson via cctalk wrote:
Hey this is all super useful info, thanks!
Any idea how to visually identify a tantalum cap? I suppose I could Google
it but maybe standards have changed between 1984 and 2020?
They would be small ones on the circuit boards, not likely
I have a stack of them here if you need them. I think they are $175 each,
$150
each for 2 or more, + $12.50 shipping for any qty.
Paul
On Thu, Apr 23, 2020 at 5:40 PM Glen Slick via cctalk
wrote:
> On Thu, Apr 23, 2020 at 3:30 PM Chris Zach via cctalk
> wrote:
> >
> > Error 47
> > Memory CSR
Well I turned on block mode DMA on my MTI controller, booted RT11 5.5,
did an init on VM0: and tried to copy a .dsk file of 2500 blocks in size
with 2mb of PMI memory from an 11/84 (CA, bad memory for Q Bus).
First time was not good:
.copy dungeo.dsk vm:
Files copied:
?PIP-F-Input error
Hey this is all super useful info, thanks!
Any idea how to visually identify a tantalum cap? I suppose I could Google
it but maybe standards have changed between 1984 and 2020?
On Thu, Apr 23, 2020, 8:06 PM Jon Elson via cctalk
wrote:
> On 04/23/2020 12:53 PM, Robert via cctalk wrote:
> > I'm
Yes, same failure. Likewise if I put board 1 in the same dip settings as
board 0 I get the same failure (and pulling out board 0 the 2mb board)
Running the 2mb memory board here with RT11, seems fine.
C
On 4/23/2020 6:39 PM, Glen Slick wrote:
On Thu, Apr 23, 2020 at 3:30 PM Chris Zach via
On Thu, Apr 23, 2020 at 3:30 PM Chris Zach via cctalk
wrote:
>
> Error 47
> Memory CSR Error
>
> Memory Map
> Starting Ending Size inCSR CSR Bus
> Addressaddress K Bytesaddress typetype
>
> - 0776 2048 17772100 ECC PMI
So the memory board might be bad. When the 11/83 runs memory tests the
1mb board (of course the one that's fixed to run on Q bus systems) fails
out with:
Testing in progress - Please wait
Memory Size is 3072 K Bytes
9 Step memory test
Step
Error 47
Memory CSR Error
See troubleshooting
On 4/23/20 12:12 PM, Al Kossow via cctalk wrote:
> The 9800 is the 8" little brother to the 9000 tension arm drive. The
> service manual
> is on bitsavers, it probably has a linear power supply. There is also an
> inverter
> supply shown but that is probably for special applications.
That's the
On 4/23/20 1:12 PM, Anders Nelson via cctalk wrote:
> Thanks for all the input!
>
> @Chuck: I assume you are talking about a 100W incandescent light bulb, I
> like that idea for current-limiting. And I agree a SMPS should cut off the
> switch if it detects a short; not sure what kind of supply is
> On Apr 23, 2020, at 3:56 PM, Fred Cisin via cctalk
> wrote:
>
> On Thu, 23 Apr 2020, Fred Cisin via cctalk wrote:
>> Aperture cards (piece of 35mm micro-film mounted in card)
>> (As opposed to Emmanuel Goldberg's "Rapid Selector", or Vannevar Bush's
>> "Memex")
>
> Goldberg's
Thanks for all the input!
@Chuck: I assume you are talking about a 100W incandescent light bulb, I
like that idea for current-limiting. And I agree a SMPS should cut off the
switch if it detects a short; not sure what kind of supply is in there but
I'll take a look.
@Patrick: There's a stamp on
On Thu, 23 Apr 2020, Fred Cisin via cctalk wrote:
Aperture cards (piece of 35mm micro-film mounted in card)
(As opposed to Emmanuel Goldberg's "Rapid Selector", or Vannevar Bush's
"Memex")
Goldberg's "Statistical machine" (Zeiss Ikon in Dresden, USA patent in
1931) was the use of light and
emanuel stiebler writes:
>> I have made emulators for more obscure hardware than this.
> You've written an emulator for it?
No... not yet. But now it's on my to-do list.
Here are some notes I made about the MIT system:
https://github.com/PDP-10/its/issues/1837
Aperture cards (piece of 35mm micro-film mounted in card)
(As opposed to Emmanuel Goldberg's "Rapid Selector", or Vannevar Bush's
"Memex")
Round hole Univac/Remington-Rand 90 column
There was folklore that IBM had PATENTED their rectangular hole shape, and
the use of a wire brush and brass
I’m fairly sure there was one at University of Texas Center for Space Research,
circa 1980 (+/- a year or 4). It would have been in a separate room from the
PDP-11 I normally used. I got to “fly” a space-suit with a manned maneuvering
unit around a wire-frame space shuttle representation on it
How about 96 column and EPC (Edge Punched) Cards?
- Original Message -
From: "Peter Van Peborgh via cctech"
To:
Sent: Thursday, April 23, 2020 2:03 PM
Subject: Odd punched cards
> Guys,
>
> I got a positive response about the Port-A-Punch cards so no longer any need
> to respond to
Peter,
I have several Port-A-Punch cards. Would you like 1 of each?
Do a search at www.ibmjunkman.com and check Holders 162, 568 and 1856.
Donald
Guys,
I got a positive response about the Port-A-Punch cards so no longer any need
to respond to this one. Very encouraging.
Still looking for Jacquard cards and original Hollerith cards. Hope springs
eternal.
peter
|| | | || | | ||
Peter Van Peborgh
62 St Mary's
On 2020-04-23 11:28, Lars Brinkhoff wrote:
> Emanuel Stiebler
>>> https://apps.dtic.mil/dtic/tr/fulltext/u2/a086098.pdf
>> GREAT FIND! I think it is the fridge I was talking/thinking about.
>
> I think it's an early generation from Grinnell. Note the year ~1977.
> The MIT one was from 1976, but
On 4/23/20 11:21 AM, Patrick Finnegan via cctalk wrote:
As a minimal step, I might disconnect the PSU from the rest of the drive,
and plug it in like that for a moment, but it's probably best to not run it
without a load for very long.
The 9800 is the 8" little brother to the 9000 tension
On Thu, Apr 23, 2020 at 11:59 AM Anders Nelson via cctalk <
cctalk@classiccmp.org> wrote:
> Cool, thanks for your take. I found some articles:
>
>-
>
> http://www.angelfire.com/electronic/funwithtubes/steps_to_first_power_on.html
>-
On 4/23/20 10:53 AM, Robert via cctalk wrote:
> I'm under caffeinated and not really with it yet, having recently gone semi
> nocturnal, so you'll want to double check this with someone who's actually
> awake.
>
> That said, variacs aren't a universal panacea and can sometimes be harmful
> rather
On 04/23/2020 12:53 PM, Robert via cctalk wrote:
I'm under caffeinated and not really with it yet, having recently gone semi
nocturnal, so you'll want to double check this with someone who's actually
awake.
That said, variacs aren't a universal panacea and can sometimes be harmful
rather than
I'm under caffeinated and not really with it yet, having recently gone semi
nocturnal, so you'll want to double check this with someone who's actually
awake.
That said, variacs aren't a universal panacea and can sometimes be harmful
rather than helpful. My disorganized memory is offering TVs as
Cool, thanks for your take. I found some articles:
-
http://www.angelfire.com/electronic/funwithtubes/steps_to_first_power_on.html
- http://www.angelfire.com/electronic/funwithtubes/Restore_cap.html
Given this unit doesn't have any tubes, I imagine the motor drivers/amps in
this thing
On Thu, Apr 23, 2020 at 1:57 PM emanuel stiebler wrote:
>
> On 2020-04-23 03:45, Tony Duell wrote:
>
> > Remember them? I have one. A rackmount box (quite tall, possible 12U
> > or more) with 2 PSUs at the bottom and mostly wire-wrapped boards in
> > the top part. Links to a DR11-B.
> >
> > Alas
Emanuel Stiebler
>> https://apps.dtic.mil/dtic/tr/fulltext/u2/a086098.pdf
> GREAT FIND! I think it is the fridge I was talking/thinking about.
I think it's an early generation from Grinnell. Note the year ~1977.
The MIT one was from 1976, but maybe the same model GMR-27(0?).
The DTIC document
> Date: Tue, 21 Apr 2020 16:17:07 -0400
> From: Chris Zach
> To: cctalk@classiccmp.org
> Subject: Re: pdp11/84 PMI memory: What is the problem with Q bus?
> Message-ID: <27647f0e-19d4-b484-d288-e9f3bb715...@alembic.crystel.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Thanks
On 2020-04-23 03:45, Tony Duell wrote:
> Remember them? I have one. A rackmount box (quite tall, possible 12U
> or more) with 2 PSUs at the bottom and mostly wire-wrapped boards in
> the top part. Links to a DR11-B.
>
> Alas I don't have any documentation for it.
Which one exactly do you have?
On 2020-04-23 05:20, Lars Brinkhoff via cctalk wrote:
> This has some interesting information.
>
> https://apps.dtic.mil/dtic/tr/fulltext/u2/a086098.pdf
>
GREAT FIND! I think it is the fridge I was talking/thinking about.
Ours was on a 11/34 running RSX ...
THANKS!!!
This has some interesting information.
https://apps.dtic.mil/dtic/tr/fulltext/u2/a086098.pdf
On Wed, Apr 22, 2020 at 10:31 PM emanuel stiebler via cctalk
wrote:
>
> Hi all,
> was just fishing in old memories & graphics systems. We had in the
> 1980's a big fridge from Grinnell Systems as a frame buffer on a 11/34.
>
> Anybody remember those? Links to any documentation?
Remember them? I
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