CPU

Description

Mind Map on CPU, created by Maddie Bellew on 14/01/2020.
Maddie Bellew
Mind Map by Maddie Bellew, updated more than 1 year ago
Maddie Bellew
Created by Maddie Bellew almost 6 years ago
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Resource summary

CPU
  1. The brain of the computer
    1. Fetch, decode, execute cycle
      1. Fetching new instructions from memory, decoding them and then executing them
        1. Fetch: the information is moved.
          1. The cycle repeats itself until the computer is switched off.
            1. The fetches information from the RAM and sent to the CPU to be decoded and then executed
              1. Decode: the information is understood.
                1. Executed: it is carried out.
                2. Central processor unit
                  1. Components of a computer
                    1. CPU: processes information
                      1. Fan: cools the components that might get hot
                        1. Motherboard: connects all components
                          1. Power supply: supplies power to the components
                            1. RAM: stores data while powered
                              1. Optical drive: reads and writes data stored on compact drives
                                1. Hard drive: reads and writes data onto metal platters
                                  1. Floppy drive: reads and writes information from floppy discs
                                    1. Graphics card: Controls what comes up on screen and is populalr with gamers and people who use screens
                                      1. Bootstrap loader: a programme in the ROM which allows the computer to start up properly.
                                      2. 1 instruction is carried out per second
                                        1. 1 hertz=1 second=1 cycle ,1 kilohertz=1 second=1 thousand cycles, 1 megahertz=1 second=1 million cycles, 1 gigahertz=1 second=1billion cycles
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