On 18/04/2019 05:47, Grant Taylor via cctalk wrote:
> If you just want core memory, check out the following link:
>
> Link - Core Memory Shield for Arduino
> - https://www.tindie.com/products/kilpelaj/core-memory-shield-for-arduino/
>
> You can actually use Core Memory on a modern computer. }:-
On 2019-Apr-17, at 9:47 PM, Grant Taylor via cctalk wrote:
> On 4/17/19 10:30 PM, Andrew Luke Nesbit via cctalk wrote:
>> Hello all,
>
> Hi,
>
>> I have been wanting to acquire a plane of magnetic core memory as a piece of
>> computing history. My partner actually thinks they look very beautifu
> > > Does anybody here have any ideas? For example, what is it? Or, if you
> > > don't know, could you point me in the right direction so I can do the
> > > research myself? Thanks!!
> > I have no idea.
> >
> > The connectors remind me of a DEC machine bus, but I don't know what the
> > bus
> From: W2HX
> i have a few CPUs available to me, a 11/23+, an 11/73 and I also have
> available to me an 11/83
> I would like to try to run as many different OS's as may interest me,
> including some unixes as possible (bsd...etc).
Early Unixes in general will run on those ma
On 04/18/2019 04:49 AM, Brent Hilpert via cctalk wrote:
It's a 4-wire 3D planar array. By topology and
construction I would guess it date it from the 60s.
Make that EARLY '60s. As soon as somebody figured out that
you could combine the sense and inhibit wires, everybody
immediately went to 3-w
Jussi Kilpelainen's page cited above (
https://www.tindie.com/products/kilpelaj/core-memory-shield-for-arduino/)
refers to the work of Ben North and Oliver Nash to create another core
memory shield for Arduino Unos. Their site inspired Jussi to create his
shield kit, which can be viewed at:
http:
On 4/18/19 9:02 AM, Jim Manley via cctalk wrote:
> Jussi Kilpelainen's page cited above (
> https://www.tindie.com/products/kilpelaj/core-memory-shield-for-arduino/)
> refers to the work of Ben North and Oliver Nash to create another core
> memory shield for Arduino Unos. Their site inspired Jussi
On 4/18/19 9:30 AM, Chuck Guzis via cctalk wrote:
> Anyone with a Williams tube project?
The 1401 guys at CHM were working on one using a real 701 tube.
I don't think it was ever finished.
@tubetimeus built a small core array with Bulgarian cores
https://twitter.com/TubeTimeUS/status/10534244
Not any dec core memory stack board I know of, - fingers are not gold
plated. - it is 8 bit.
I could speculate it might be from a low cost system from the late 70s
or early 80s but
in that time, everything core was in the many thousands of dollars.
On Thu, Apr 18, 2019 at 12:30 PM Chuck Guzis via
My understanding was that the mercury delay lines needed periodic repairs ( not
sure what the cause was but mercury does dissolve into many metals ). If I were
going to make a delay line memory, I'd go with the magnetostrictive. These are
practical to make. One just needs a little ingenuity and
On 4/18/19 2:08 AM, Andrew Luke Nesbit wrote:
This is great and I will look into this.
I'm generally not into SBCs. (I do more with virtualization than have
SBCs proliferate.) But the idea of having core memory, and it working,
is quite appealing to me.
But my original request was for so
On 4/18/19 9:42 AM, Al Kossow via cctalk wrote:
>
> The 1401 guys at CHM were working on one using a real 701 tube.
> I don't think it was ever finished.
I don't expect that any EBAM has survived--I think all of the stuff I
saw at CDC ADL was scrapped. Seems that the technology is all but
forgot
> On Apr 18, 2019, at 11:47 AM, Jon Elson via cctalk
> wrote:
>
> On 04/18/2019 04:49 AM, Brent Hilpert via cctalk wrote:
>> It's a 4-wire 3D planar array. By topology and construction I would guess it
>> date it from the 60s.
> Make that EARLY '60s. As soon as somebody figured out that you
On Thu, 4/18/19, dwight via cctalk wrote:
> My understanding was that the mercury delay lines
> needed periodic repairs ( not sure what the cause
> was but mercury does dissolve into many metals ).
> If I were going to make a delay line memory, I'd go with
> the magnetostrictive. These are practic
I am the enviable owners of a plane of memory (procured a few years back
at VCF-East, when there were a bunch of 32K? boards int he consignment pile.
(Sorry, not currently interested in selling :-)
But, I am thankful for the links, as I have wanted to interface this
with a CPU or PC of some ki
My mention of electron-beam memory devices left off GE's BEAMOS and
RCA's Selectron.
WikiPedia has a nice article on the Selectron, but BEAMOS took a bit of
looking:
http://rcaselectron.com/GEBEAMOS.html
Too bad that neither RCA nor GE were in the computer business in 1978.
--Chuck
> I don't expect that any EBAM has survived--I think all of the stuff I
> saw at CDC ADL was scrapped. Seems that the technology is all but
> forgotten today:
>
> https://bit.ly/2KOOl82
How was the CDC EBAM different from the other memory tubes, like the Radechon?
--
Will
> (Sorry, not currently interested in selling :-)
Well, I am. And I have a LOT of 8K core system modules (planes and
drivers) from old Stewart-Warner (I think) vector graphics terminals
from the 1960s. Check Ebay in a week or three...
--
Will
> Or still do a fluid one, but take Turing's suggestion
> and use gin as the medium.
Better use some good error correction.
--
Will
I don't believe there is a simple non-destructive way to read the state. If you
could remove the cores, I believe you could put each core in a weak magnetic
field. As the field passes from side to side, one should be able to determine
the direction of the saturated cores because one side would a
On 4/18/19 10:33 AM, dwight via cctalk wrote:
> I don't believe there is a simple non-destructive way to read the state.
https://patents.google.com/patent/US3924248
Does anyone know what the current status of this might be? I am
fairly certain Mentec didn't get this and I am not sure anyone
did. Did it merely die when everyone thought Mumps was on the
down hill slide? Was it ever really a DEC product or was it
something DEC picked up along the way after Mas
> * Is there a way to "read" the core non destructively using any kind
> of passive method (I know, it would be tedious, no doubt, but I just
> feel like I should "backup" the core before I go messing with it)?
I'm having trouble figuring out what typical magnetic field strengths on
t
On 04/18/2019 10:56 AM, Noel Chiappa via cctalk wrote:
> > From: W2HX
>
> > i have a few CPUs available to me, a 11/23+, an 11/73 and I also have
> > available to me an 11/83
> > I would like to try to run as many different OS's as may interest me,
> > including some unixes as p
> On Apr 18, 2019, at 1:56 PM, Bill Gunshannon via cctalk
> wrote:
>
>
> Does anyone know what the current status of this might be? I am
> fairly certain Mentec didn't get this and I am not sure anyone
> did. Did it merely die when everyone thought Mumps was on the
> down hill slide? Was i
> On Apr 18, 2019, at 2:19 PM, allison via cctalk wrote:
>
> ...
> There may be other versions that place less of a burden on requiring I&D.
> However I've not encountered a need for FPU connected to OS. Also
> the assumption for many unix is MMU support but not all DEC OS have
> that require
On 4/18/2019 2:27 PM, Paul Koning via cctalk wrote:
> my memory is that DSM-11 is an operating system all its own, not just a
> language processor running on top of a standard OS like RSTS.
In the late 1980s and early 1990s, we used DSM running on VMS 4.7 for a
nationwide (United States) mortgage
On Thu, Apr 18, 2019 at 12:41 PM Dan Veeneman via cctalk <
cctalk@classiccmp.org> wrote:
> On 4/18/2019 2:27 PM, Paul Koning via cctalk wrote:
> > my memory is that DSM-11 is an operating system all its own, not just a
> language processor running on top of a standard OS like RSTS.
>
> In the late
On 4/18/19 2:41 PM, Dan Veeneman wrote:
> On 4/18/2019 2:27 PM, Paul Koning via cctalk wrote:
>> my memory is that DSM-11 is an operating system all its own, not just a
>> language processor running on top of a standard OS like RSTS.
>
> In the late 1980s and early 1990s, we used DSM running on V
On 2019-Apr-18, at 8:47 AM, Jon Elson wrote:
> On 04/18/2019 04:49 AM, Brent Hilpert via cctalk wrote:
>> It's a 4-wire 3D planar array. By topology and construction I would guess it
>> date it from the 60s.
> Make that EARLY '60s. As soon as somebody figured out that you could combine
> the sen
On 2019-Apr-18, at 9:30 AM, Chuck Guzis via cctalk wrote:
> On 4/18/19 9:02 AM, Jim Manley via cctalk wrote:
>> Jussi Kilpelainen's page cited above (
>> https://www.tindie.com/products/kilpelaj/core-memory-shield-for-arduino/)
>> refers to the work of Ben North and Oliver Nash to create another co
> From: Jon Elson
> As soon as somebody figured out that you could combine the sense and
> inhibit wires, everybody immediately went to 3-wire planes.
I"m suprised the idea wasn't patented. Or maybe it was, and they made the
license widely available at modest terms?
Noel
> From: Allison
> Experience is that an 11/23 or 23+ will run V6 as mine does.
What changes did you make to get it to run? (I assume the stock binary
wouldn't run.)
Noel
On 04/18/2019 04:19 PM, Noel Chiappa via cctalk wrote:
> > From: Allison
>
> > Experience is that an 11/23 or 23+ will run V6 as mine does.
>
> What changes did you make to get it to run? (I assume the stock binary
> wouldn't run.)
>
> Noel
The hardest part was was getting it on a RL
> -Original Message-
> From: cctalk On Behalf Of Chuck Guzis via
> cctalk
> Sent: 18 April 2019 17:30
> To: Jim Manley via cctalk
> Subject: Re: Plane of core memory
>
> On 4/18/19 9:02 AM, Jim Manley via cctalk wrote:
> > Jussi Kilpelainen's page cited above (
> > https://www.tindie.com
>Stewart-Warner (I think) vector graphics terminals
> from the 1960s. Check Ebay in a week or three...
Correction: Hazeltine.
--
Will
> On Apr 18, 2019, at 3:06 PM, Warner Losh wrote:
>
> On Thu, Apr 18, 2019 at 12:41 PM Dan Veeneman via cctalk
> wrote:
> On 4/18/2019 2:27 PM, Paul Koning via cctalk wrote:
> > my memory is that DSM-11 is an operating system all its own, not just a
> > language processor running on top of
On Thu, Apr 18, 2019 at 5:11 PM Paul Koning wrote:
>
>
> > On Apr 18, 2019, at 3:06 PM, Warner Losh wrote:
> >
> > On Thu, Apr 18, 2019 at 12:41 PM Dan Veeneman via cctalk <
> cctalk@classiccmp.org> wrote:
> > On 4/18/2019 2:27 PM, Paul Koning via cctalk wrote:
> > > my memory is that DSM-11 is
DSM went to InterSystems Corp. during their spree of buying up every MUMPS
implementation vendor they could get their hands on. They got DataTree (DTM),
Micronetics (MSM), and DSM. They already had ISM. They merged ISM and features
from the others into OpenM, which evolved into Caché, their curr
> On Apr 18, 2019, at 7:41 PM, Warner Losh wrote:
>
>
>
>> On Thu, Apr 18, 2019 at 5:11 PM Paul Koning wrote:
>>
>> ...
>> Poor man's hypervisor, I like that.
>>
>> That's reasonably accurate. RSTS/E had "run-time systems", originally the
>> interpreter, support library, and user interf
I believe I read they weaved the planes this way to minimize crosstalk, EMI
or heat.
=]
On Thu, Apr 18, 2019, 1:13 PM Paul Koning via cctalk
wrote:
>
>
> > On Apr 18, 2019, at 11:47 AM, Jon Elson via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > On 04/18/2019 04:49 AM, Brent Hilpert via ccta
Well, I was finally able to get a PMI memory board to expand my
11/93 to the full 4 Meg. (Thanks Paul!)
I thought it would be as simple as configuring what bank I wanted
it to fill and inserting it (in front of the CPU). Sadly, that
didn't work. First problem is the only document i could find
So it appears it went for 168 K$ at hammer.
With buyer's premium, that puts the sale price at 210 K$.
https://www.rrauction.com/bidtracker_detail.cfm?IN=5222
weird this only went for 220 bucks
https://www.rrauction.com/bidtracker_detail.cfm?IN=5109
On Thu, Apr 18, 2019 at 9:03 PM Brent Hilpert via cctalk <
cctalk@classiccmp.org> wrote:
> So it appears it went for 168 K$ at hammer.
>
> With buyer's premium, that puts the sale price at 210 K$.
>
>
On 04/18/2019 03:15 PM, Noel Chiappa via cctalk wrote:
> From: Jon Elson
> As soon as somebody figured out that you could combine the sense and
> inhibit wires, everybody immediately went to 3-wire planes.
I"m suprised the idea wasn't patented. Or maybe it was, and they made the
Although, after written, there is little magnetism lost out side of the ring,
while being magnetized, there is quite a bit of stray magnetism. By placing the
the rings at 90 degrees, it minimizes the magnetism induced in the adjacent
ring. The fields follow the inverse square law so the effect d
The second memory boards CSR should be viable in ODT.
The toggle switch internal contacts may be tarnished with age. Cycle
each switch, that is used in the on position, multiple times and see if
the CSR appears.
Try another CSR if necessary to confirm the memory board is responsive
to Q-bus re
Bidding hasn't ended on the display electronics, but, it's not clear when
bidding will end, so, bid high and often! :D
On Thu, Apr 18, 2019 at 8:05 PM Adrian Stoness via cctalk <
cctalk@classiccmp.org> wrote:
> weird this only went for 220 bucks
> https://www.rrauction.com/bidtracker_detail.cfm?I
I believe 3 wire memory was first introduced by IBM in their 360 systems, and
it was a very large development effort. They would almost certainly have
patented their way to do it, but I have not checked.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Jon Elson , "cctalk@
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