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Hardware

Description

Mind Map on Hardware, created by bcook11 on 13/01/2016.
bcook11
Mind Map by bcook11, updated more than 1 year ago
bcook11
Created by bcook11 over 8 years ago
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Resource summary

Hardware
  1. CPU
    1. ALU - arithmatic logic unit
      1. does the maths
      2. immediate access store
        1. register
        2. control unit
          1. recieves instructions from RAM and directs
          2. fetch, decode, execute cyle
            1. process it
              1. work out what to do
                1. fetch instructions from RAM
                2. number of cores
                  1. not twice as fast
                    1. dues improve speed
                      1. dual/quad/out
                      2. clock speed
                        1. measured - 1000 million in GHz per second
                        2. cache
                          1. high speed memory
                        3. users with special needs
                          1. speech recognition
                            1. eyetyper
                              1. braille keyboard
                              2. secondary storage
                                1. solid state
                                  1. like USB
                                  2. optical
                                    1. colour
                                    2. magnetic
                                    3. memory
                                      1. cashe
                                        1. virtual
                                          1. RAM
                                            1. volitile
                                            2. Flash
                                              1. USB
                                              2. ROM
                                                1. Boot sequence
                                              3. Binary logic
                                                1. allows use of logic gates
                                                  1. AND
                                                    1. OR
                                                      1. NOT
                                                      2. high tolerance
                                                        1. stops mistakes
                                                        2. computer components use O & I (on and off)
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