I am curious, generally speaking, as to what are the physical processes behind the workings of a CPU. I understand that the reason why computers use binary is because it means that data can be stored magnetically by direction, or electrically by charged/discharged.
For example, if I have two bytes 01110000 and 00001111, what electrically happens when, say, the second is subtracted from the first?
(I understand that a fully-detailed answer to this would be company secret, but I am asking out of curiosity and not for anything specific to a given manufacturer.)
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