ID some core memory

[Adrian Stoness]

would sperry univac fit those markings?

On Tue, Jan 2, 2018 at 6:09 PM, william degnan 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.
> > >>
> > >>
> >
>
>
> 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
>