On Wed, 2006-02-15 at 15:06 +0100, Lembit Soobik wrote:

> We developed the new generation machines using core memory and blocking 
> oscillators (rather than flip-flops, monoflops) because they worked with 
> only one transistor. Transistors were expensive, around 5 to 10 $ a piece.
> 
> Lembit

That's interesting.  The only computers that I know of using cores for
logic werebuiltby Elliott Bros.in England.   There is a brief
description of the logic here
http://members.ozemail.com.au/~jacksmth/ell803b.htm

I'm currently working on a software "core level" emulation of this
machine.  Luckily I have a (nearly) complete set of the logic diagrams
and the descriptive texts for the machine.  So far it's running simple
programs and I'm just coding up the logic for the flaoting point
instructions.

Peter

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