>
> Of course they are analogue devices, but their analogue nature makes no
> difference to the computation. If the ripple in the power supply of a TTL
> circuit were >4 volts then the computer's true analogue nature would
> intrude and it would malfunction.
>
> Stathis Papaioannou

Of course you are right..The original intent of my statement was to try
and correct any mental misunderstandings about the difference between the
real piece of material manipulating charge and the notional 'digital'
abstraction represented by it. I hope I did that.

Colin


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