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gcse computer science (1.1 systems architecture (1.1.2 &1.1.3 i can…

- - - - arithmatic logic unit
        
        does simple maths
        
        compares things
    - - memory data register
        
        stores the data bieng processed
    - - the guy who created the cpu
    - - memory adress register
        
        where the data is fetched by the cpu
    - - Counts The programs and records where the processor is up to
    - - controls the flow of data around the cpu
    - - Short term intermediate storage used between the fde cycle loops
    - - A portion of memory made from high speed static RAM
  - - - microwave
      - toaster
      - washing machine
  - - - has 3 levels
        
        level 2
        
        level 3
        
        level 1
      - expensive
      - fast to access
      - Used for common tasks that the processor does all the time
    - - there are different types of cores
        
        dual(2)
        
        quad(4)
        
        single(1)
        
        octo(8)
      - Number of cores could be compared to driving on a road: the more lanes/cores there are the more cars/instructions can pass/be executed
    - - measures the number of times the fde cycle is completed in hertz
- - - - 100 page book with 30 postcard sized photos
        
        (100x0.1)+(30x6)=
        
        190Mb
    - - 1 page word document with no pictures
        
        0.1Mb
      - Postcard sized photograph
        
        6Mb
      - 3 minute MP3 music file
        
        6Mb
      - 1 minute compressed video file
        
        50Mb
      - Standard definition feature film
        
        4Gb
      - High definition feature film
        
        8-15Gb
  - - - hard disk drive
      - magnetic tape(vhs)
    - - dvd
      - blu-ray
      - cd