30 Dec
2017
30 Dec
'17
11:21 a.m.
Just curious...can anyone id the system that used these two types of core
memory? I am thinking the first is a hand-made custom core, but the 2nd is
definitely from a commercial system. Looks kind of IBM-ish but it's
nothing I can ID. It's not an IBM 1401 I don't think.
http://vintagecomputer.net/core-memory/
Thanks
Bill
1 Jan
1 Jan
9:28 a.m.
On 12/30/2017 01:21 PM, william degnan via cctalk wrote:
Just curious...can anyone id the system that used
these two types of core
memory? I am thinking the first is a hand-made custom core, but the 2nd is
definitely from a commercial system. Looks kind of IBM-ish but it's
nothing I can ID. It's not an IBM 1401 I don't think.
http://vintagecomputer.net/core-memory/
There are some stamps on the metal frame in
the 6th picture
that REALLY look like IBM markings.
IBM made a number of computer families in the early 60's.
How many wires pass through each core?
if it has 4 wires, that will date it as early 60's, as
almost all systems moved to 3 wires by combining the sense
and inhibit
wires by 1965 or earlier. it does appear to have 40 bit
planes, however, which doesn't ring any IBM bells for me.
The 7070 was supposed to have an 8-digit word plus a sign
digit, so that sounds like 44 bits.
Jon
8:36 p.m.
On Tue, Jan 2, 2018 at 4:28 AM, Jon Elson via cctalk
<cctalk at classiccmp.org> wrote:
wires by 1965 or earlier. it does appear to have 40
bit planes, however,
Elliott 503 and 803 were 40-bit machines, 39 data bits + one parity
bit and from the early 1960s.
https://en.wikipedia.org/wiki/Elliott_803
We have the backing-core stack for the 503 and Bill's stack is quite
different. We also have the main core stack for the 503 but not seen
directly as the example we have is still in its cooling shroud.
I can't find pictures of the 803 core stack but here are pictures of
the 503 core stacks:
https://photos.app.goo.gl/hNA0urEpkPkOhEm22
503 Backing magnetic core store:
https://goo.gl/photos/R2xT85NN1c9DmBZk7
4:03 p.m.
Bill said
Just curious...can anyone id the system that used
these two types of core
memory? I am thinking the first is a hand-made custom core, but the 2nd is
definitely from a commercial system. Looks kind of IBM-ish but it's
nothing I can ID. It's not an IBM 1401 I don't think.
http://vintagecomputer.net/core-memory/
Thanks
Bill
It's not a 1401 core plane. Here are a couple of pictures of what (I am pretty sure)
is a 1401 core plane that I have from my dad:
http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_1.jpg
Close-up. Has a sharp molded corner and the grooves for the wires:
http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_2.jpg
Refer to PDF page 12 of
http://www.bitsavers.org/pdf/ibm/1401/A24-1403-5_1401_Reference_Apr62.pdf
for another photo of this.
Steve.
4:52 p.m.
could be hp or phillips?
On Mon, Jan 1, 2018 at 6:03 PM, Steve Malikoff via cctalk <
cctalk at classiccmp.org> wrote:
Bill said
Just curious...can anyone id the system that used
these two types of core
memory? I am thinking the first is a hand-made custom core, but the 2nd
is
definitely from a commercial system. Looks kind
of IBM-ish but it's
nothing I can ID. It's not an IBM 1401 I don't think.
http://vintagecomputer.net/core-memory/
Thanks
Bill
It's not a 1401 core plane. Here are a couple of pictures of what (I am
pretty sure) is a 1401 core plane that I have from my dad:
http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_1.jpg
Close-up. Has a sharp molded corner and the grooves for the wires:
http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_2.jpg
Refer to PDF page 12 of http://www.bitsavers.org/pdf/
ibm/1401/A24-1403-5_1401_Reference_Apr62.pdf
for another photo of this.
Steve.
8:57 p.m.
Not HP. They used much smaller Ampex made core planes in the 2116.
Marc
On Jan 1, 2018, at 4:52 PM, Adrian Stoness via cctalk
<cctalk at classiccmp.org> wrote:
could be hp or phillips?
On Mon, Jan 1, 2018 at 6:03 PM, Steve Malikoff via cctalk <
cctalk at classiccmp.org> wrote:
> Bill said
>> Just curious...can anyone id the system that used these two types of core
>> memory? I am thinking the first is a hand-made custom core, but the 2nd
> is
>> definitely from a commercial system. Looks kind of IBM-ish but it's
>> nothing I can ID. It's not an IBM 1401 I don't think.
>> http://vintagecomputer.net/core-memory/
>> Thanks
>> Bill
>
> It's not a 1401 core plane. Here are a couple of pictures of what (I am
> pretty sure) is a 1401 core plane that I have from my dad:
> http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_1.jpg
> Close-up. Has a sharp molded corner and the grooves for the wires:
> http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_2.jpg
>
> Refer to PDF page 12 of http://www.bitsavers.org/pdf/
> ibm/1401/A24-1403-5_1401_Reference_Apr62.pdf
> for another photo of this.
>
> Steve.
>
>
2 Jan
2 Jan
4:09 p.m.
> Bill said
>> Just curious...can anyone id the system that used these two types of
core
>> memory? I am thinking the first is a
hand-made custom core, but the
2nd
> is
>> definitely from a commercial system. Looks kind of IBM-ish but it's
>> nothing I can ID. It's not an IBM 1401 I don't think.
>> http://vintagecomputer.net/core-memory/
>> Thanks
>> Bill
>
> It's not a 1401 core plane. Here are a couple of pictures of what (I am
> pretty sure) is a 1401 core plane that I have from my dad:
> http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_
plane_1.jpg
> Close-up. Has a sharp molded corner and the
grooves for the wires:
> http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_
plane_2.jpg
>
> Refer to PDF page 12 of http://www.bitsavers.org/pdf/
> ibm/1401/A24-1403-5_1401_Reference_Apr62.pdf
> for another photo of this.
>
> Steve.
>
>
10:28 p.m.
would sperry univac fit those markings?
On Tue, Jan 2, 2018 at 6:09 PM, william degnan via cctalk <
cctalk at classiccmp.org> wrote:
am
I think given the IBM-esque printed markings all types of IBM core should
be ruled out first. For example the IBM 1620. But now you can see why I
am asking, what I have does not quite fit.
On the wirewrap side there are four numbered grids on 4 physical plates,
wired together. The ...'s represent "the continuation of wirewrap rows"
1,2,3,4,5,...33 etc.
1 [wirewrap] --- 133 [wirewrap] 67 1
.... .... .... ..
33 165 99 32
33
34
34 [wirewrap] --- 166 [wirewrap] 100 35
.. ... ... ...
... 66
66 198 132
> Bill said
>> Just curious...can anyone id the system that used these two types of
core
>> memory? I am thinking the first is a
hand-made custom core, but the
2nd
>> is
>>> definitely from a commercial system. Looks kind of IBM-ish but it's
>>> nothing I can ID. It's not an IBM 1401 I don't think.
>>> http://vintagecomputer.net/core-memory/
>>> Thanks
>>> Bill
>>
>> It's not a 1401 core plane. Here are a couple of pictures of what (I >
pretty sure) is a 1401 core plane that I have from my dad:
> http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_
plane_1.jpg
> Close-up. Has a sharp molded corner and the
grooves for the wires:
> http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_
plane_2.jpg
>
> Refer to PDF page 12 of http://www.bitsavers.org/pdf/
> ibm/1401/A24-1403-5_1401_Reference_Apr62.pdf
> for another photo of this.
>
> Steve.
>
>
1 Jan
1 Jan
7:06 p.m.
On 01/01/2018 04:03 PM, Steve Malikoff via cctalk wrote:
It's not a 1401 core plane. Here are a couple of pictures of what (I am pretty sure)
is a 1401 core plane that I have from my dad:
http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_1.jpg
Close-up. Has a sharp molded corner and the grooves for the wires:
http://web.aanet.com.au/~malikoff/ibm/IBM_1401_core_memory_plane_2.jpg
Refer to PDF page 12 of
http://www.bitsavers.org/pdf/ibm/1401/A24-1403-5_1401_Reference_Apr62.pdf
for another photo of this.
I've got one of those sitting in a desk drawer, if you need closeups.
--Chuck
2313
days inactive
2317
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8 comments
7 participants
participants (7)
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billdegnan＠gmail.com -
cclist＠sydex.com -
curiousmarc3＠gmail.com -
elson＠pico-systems.com -
nw＠retrocomputingtasmania.com -
steven＠malikoff.com -
tdk.knight＠gmail.com