How Do Computers Work – Part 3/3 (What A Microprocessor Does)

I never knew what a microprocessor did, but the more I find out about it, the more I realize how wonderfully complex they are. It’s fascinating. The computer works together with the same precision as a human body. The first thing talked about in this video was the fetch-execute cycle for microprocessors. There are four steps in the fetch-execute process: fetch, decode, execute, and store. Starting with the fetch process, the computer releases a pulse that tells the control unit to release the next cycle. The control unit then instructs the program counter to put the number of the next step of the program on an address bus. Then, the decoding process starts. This step only includes the control unit. Like the name suggests, this step is all about figuring out the best way to perform an action based on the instructions given. The execute step sends instructions to different parts of the computer. The last step is the store process. The results of these instructions and calculations are stored back in system memory. The system memory reads the data, and saves it in the correct location. I swear, it seems the more I learn about computers, the less I feel like I actually know.



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