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Every modern computer, when you get right down to the bare metal, is doing basically the same sort of thing. Ive said before that computers are just overgrown calculators, but how do you go from a simple calculator to playing video games, sending stuff over the internet, or even decompressing and displaying the millions of pixels in this video? In short, whats your computer actually doing? Behind me is a scaled-up version of a computer, but were going to go much, much simpler. If you take apart your phone or PC, somewhere in the heart of it will a Central Processing Unit, or CPU, connected to all the other devices that make it work. Now, to show a really basic example, were not going to use all those devices. The first one we are going to use is the clock. With every tick of the clock, our CPU goes through a step in whats called the Fetch-Execute cycle, or Fetch-Decode-Execute. This clock is slightly magic, in that it ticks (click) every time (click) I click my fingers. (clic
