On Fri, Oct 23, 2020 at 11:57 AM Eric Smith wrote:
> On Wed, Oct 21, 2020 at 6:22 AM Pontus Pihlgren via cctalk <
> cctalk@classiccmp.org> wrote:
>
I have seen PDP-15 core memory and it is not that format. It looks like
>>
> the memory modules from a PDP-8/I or -8/L
>>
>
> The ME15 memory for the
On Wed, Oct 21, 2020 at 6:22 AM Pontus Pihlgren via cctalk <
cctalk@classiccmp.org> wrote:
> On Tue, Oct 20, 2020 at 11:26:22PM -0400, Chris Zach via cctalk wrote:
> > > Or maybe a PDP-15? 18 bits plus parity.
> >
> > Possible, did the pdp15 use that type of board?
> >
>
> I have seen PDP-15 core
> (Whether that's all done on the companion driver boards, and the H21x
> card would just bring the wiring of the two banks out to the edge
> connector in parallel, letting the driver board do what it wants, I
> don't know - you'd have to look at the MM11-L engineering drawings/TM.)
> From: Chris Zach
> My guess is the H215 has two more core fields on it
I uploaded a (crappy - sigh) image of an H215 I have to here:
https://gunkies.org/wiki/File:H215-core-memory-board.jpg
and it's clearly not symmetrical, but does have a slightly bugger blank space
than yours. It
Ok, then my guess is this either came from a KI or a KA with a very
different memory box. I'll put it in the collection, and oddly enough
I'll bet that it could work in the 11/05 if one of those boards ever
blow out.
C
On 10/22/2020 1:56 PM, Pontus Pihlgren wrote:
I know for certain they had
I know for certain they had KL and KS machines but no KA.
It is possible they had a KI machine.
/P
On Thu, Oct 22, 2020 at 01:42:43PM -0400, Chris Zach wrote:
> Exactly. See:
>
> http://www.crystel.com/pdp/DSC_0032.JPG
>
> So which class of pdp-10 did QZ have? KA or KI?
>
> CZ
>
> On 10/22/2
Exactly. See:
http://www.crystel.com/pdp/DSC_0032.JPG
So which class of pdp-10 did QZ have? KA or KI?
CZ
On 10/22/2020 1:33 PM, Pontus Pihlgren wrote:
Does yours look like this:
https://digitaltmuseum.se/021026360851/ferritkarnminne
The one pictured should be from QZ which had PDP-10 machin
Does yours look like this:
https://digitaltmuseum.se/021026360851/ferritkarnminne
The one pictured should be from QZ which had PDP-10 machines.
On Wed, Oct 21, 2020 at 05:48:22PM -0400, Chris Zach via cctalk wrote:
> Very similar to mine, however this one has only one of the core mats
> un-woven
My guess is the H215 has two more core fields on it since mine has 3 (18
bits plus parity). Odd they could fit up to 20 bits, maybe an early ECC
(16b+4 ECC?)
C
On 10/21/2020 7:17 PM, Noel Chiappa via cctalk wrote:
> From: Richard Sheppard
> There's a piece of core on eBay .. which
I'm pretty sure the H216 was too new to have been used in an MA10 or
MB10, but I don't know which core planes or other modules were used.
They might have still been using core modules made by external vendors
like Ferroxcube.
It's looking to be the same vintage as the 11/05 memory I have (the
3. Tell us more about Doug, and his apartment :-)
Alas, those legends are lost in the mists and tubes of time... Only
fragments remain to cause giggles at random intervals.
CZ
> From: Richard Sheppard
> There's a piece of core on eBay .. which claims to be H214. The
interesting
> thing is the label says 8K x 16 but the silkscreen says 8K x 19.
DEC did that a lot; used one silkscreen (and etch) for two different modules,
with differing componet sets to prod
Very similar to mine, however this one has only one of the core mats
un-woven. Want me to take a picture of it?
C
On 10/21/2020 1:33 PM, Richard Sheppard via cctalk wrote:
There’s a piece of core on eBay
https://www.ebay.com/itm/DEC-Digital-H214-Digital-Equipment-Core-Memory-Litton-38540-1/11
There’s a piece of core on eBay
https://www.ebay.com/itm/DEC-Digital-H214-Digital-Equipment-Core-Memory-Litton-38540-1/111384040291
which claims to be H214. The interesting thing is the label says 8K x 16 but
the silkscreen says 8K x 19.
Sent from Mail for Windows 10
On Tue, Oct 20, 2020 at 11:26:22PM -0400, Chris Zach via cctalk wrote:
> > Or maybe a PDP-15? 18 bits plus parity.
>
> Possible, did the pdp15 use that type of board?
>
I have seen PDP-15 core memory and it is not that format. It looks like
the memory modules from a PDP-8/I or -8/L
Admittedly
Doug Jackson wrote:
> Those of us late to the party may like to know:
> 1. What was AL
> 2. Why was it famous?
Not AL, but AI. Also known as MIT-AI on the ARPANET. It was the PDP-10
used by the MIT AI lab, hence the name. The Incompatible Timesharing
System was developed on their PDP-6, later
Those of us late to the party may like to know:
1. What was AL
2. Why was it famous?
3. Tell us more about Doug, and his apartment :-)
Kindest regards,
Doug Jackson
em: d...@doughq.com
ph: 0414 986878
Check out my awesome clocks at www.dougswordclocks.com
Follow my amateur radio adventures at
Chris Zach wrote:
> Did AI use MA10 memory boxes?
No. It had the original 256K "moby" from Fabri-Tek, and another 256K
from Ampex. The associated PDP-6 had an older DEC Type 16x-something
16K memory.
> Did any of that stuff survive?
Maybe bits and pieces here and there. The AI KA10 went to Co
On Tue, Oct 20, 2020 at 10:02 PM Chris Zach wrote:
> Ok, so the MF10 would have been hooked up to a KI10.
>
The ME10 was the first core box for the PDP-10 memory bus that supported
22-bit addressing, and could be used on the KA10, KI10, or KL10 (with a
DMA20 memory bus interface, not available o
Ok, so the MF10 would have been hooked up to a KI10. That makes sense
then. Still interesting wonder what set of bad decisions led it to my
box of parts
Anyone need DZ11's?
C
On 10/20/2020 11:39 PM, Eric Smith wrote:
On Tue, Oct 20, 2020 at 8:06 PM Chris Zach via cctalk
mailto:cctalk@cla
On Tue, Oct 20, 2020 at 8:06 PM Chris Zach via cctalk
wrote:
> The real weird one is a quad board H216. I thought it was a Unibus core
> memory board,
Most of the DEC core plane boards were not specific to any particular bus.
though there are some exceptions.
> but it's 8k*19 bits, which mean
Or maybe a PDP-15? 18 bits plus parity.
Possible, did the pdp15 use that type of board?
I would guess that that would be much more likely.
Problem is I have never been near a pdp15, but I have been in proximity
to AI. I don't remember what happened to it after Doug's apartment, I do
remem
On 10/20/2020 9:05 PM, Chris Zach via cctalk wrote:
> Now I'm starting to look through boxes to see if I have another 11/24
> CPU. I seem to recall picking a second one up somewhere, I also want to
> see if I still have the driver board for the second Plessy core memory.
> Might be around, might ha
Now I'm starting to look through boxes to see if I have another 11/24
CPU. I seem to recall picking a second one up somewhere, I also want to
see if I still have the driver board for the second Plessy core memory.
Might be around, might have been pitched.
So far I did find a box of DZ11's. Not
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