would sperry univac fit those markings? On Tue, Jan 2, 2018 at 6:09 PM, william degnan via cctalk < [email protected]> 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 >
