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1.1 SYSTEMS ARCHITECTURE - Coggle Diagram

- - - - Decodes instructions retrieved from memory
      - Controls other hardware
      - Moves data around the system
    - - Performs arithmetic calculations such as addition, subtraction, multiplication and division
      - Performs logical operations such as AND, OR and NOT
      - Performs bit shifts
        
        A left shift of one place doubles the value
        
        A right shift of one place halves the value
    - - Small, fast volatile memory
      - Stores frequently used instructions
      - Reduces time taken to retrieve data or instructions
  - - - Stores the memory address of the next instruction to be executed
    - - Stores the memory address of the instruction currently being executed
    - - Stores the data that is being transferred to or from main memory
    - - Stores the results from the ALU