Like, yes, i know it’s electric and such. But I recently talked to an engineer and he, as I understand, said that there are still switches and other mechanics but microscopic inside CPUs and circuit boards.
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They are only transistors. A transistor is basically an electrically commanded switch.
Arrange transistors in some way and you make logic cells, AND, OR, NOT, that kind of thing. arrange these in some way and you get memory, additioners, multipliers, and so on.
Mix all that in a billion way and you get complex instruction sets across multiple cores and memory cache, basically a modern CPU.
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