Which Dec Emulation is the MOST useful and Versatile?

Brent Hilpert bhilpert at shaw.ca
Fri Oct 27 15:38:59 CDT 2017

On 2017-Oct-27, at 12:57 PM, Paul Koning via cctalk wrote:
>> On Oct 27, 2017, at 3:21 PM, Al Kossow via cctalk <cctalk at classiccmp.org> wrote:
>> On 10/27/17 12:16 PM, Chuck Guzis via cctalk wrote:
>>> I've long had a fantasy about building a core-logic CPU such as the
>>> Univac Solid State.
>> I have been told the behavior of Univac magnetic logic was similar to NMOS
> That doesn't sound even close.

It does seem like a strange statement.
I wonder if they were just trying to draw an analogy between the inherent dynamic operation requirements of magnetic logic and the dynamic operation requirements of some (many?) NMOS designs (not really inherent to NMOS).

> Ken Olsen did his thesis on magnetic core logic.  There is some (but surprisingly little) information on line about this technology.  There are two flavors: with permanent magnetic cores (memory cores) and with "soft" cores (transformers).  Apollo "rope" core memory ROM is an example of the former.
> 	paul

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