1 Apr
2022
1 Apr
'22
12:54 p.m.
On Apr 1, 2022, at 3:38 PM, Joshua Rice <Rice43 at
btinternet.com> wrote:
Nice. Is that actually a transformer ROM, or a square loop type core rope ROM? The
physical appearance supports both conclusions. To be sure you'd have to analyze the
driving circuitry, or check the properties of the cores used in it.
paul
On Apr 1, 2022, at 7:51 PM, Paul Koning via
cctalk <cctalk at classiccmp.org> wrote:
Neat looking stuff. It doesn't look like core rope memory in the sense of the AGC
ROM, nor in the sense of the Electrologica X1. It looks more like the transformer memory
used in Wang calculators that you documented in your core ROM paper.
paul
I second the Transformer ROM theory. I guess the transformers are the epoxied modules on
the top half of the board, with some weird magnetic/inductance wizardry at the bottom
doing the adressing. You may find it?s a hybrid of core rope and transformer ROM for super
dense ROMs. I?m no expert at the nuances of this field though.
Reminds me a bit of my Wagenr Computer transformer ROM:
https://www.reddit.com/r/vintagecomputing/comments/m3pe29/a_very_photogenic…