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Computer Science - Coggle Diagram

- - - - Replicates by reproducing itself
      - Infects other programs by modifying them
      - Can also infect other parts of the operating system
- - - - Holds the result of calculations done by the ALU
    - - Holds the address of the next instruction to be executed by the memory
    - - Holds the address of where the data is to be fetched or stored
    - - Holds the data fetched from, or to be written to memory
- - - - The address in the program counter is then incremented by one. The program counter now holds the address of the next instruction to be fetched.
        
        The processor sends a signal along the address bus to the memory address held in the MAR.
        
        The instruction/data held in that memory address is sent along the data bus to the MDR.
        
        The instruction/data held in the memory data register (MDR) is copied into the (current instruction register) CIR.
        
        The instruction/data held in the current instruction register (CIR) is decoded and then executed. Results of processing are stored in the ACC.
        
        The cycle then repeats