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systems architecture - Coggle Diagram

- - - - executes programes
        
        the cpu has a clock, every time the clock 2ticks" a single instruction is proccessed
        
        can proccess billions of instructions per second
  - - - the first instruction in the program is loaded form main memory into the cpu
        (it is fetched)
    - - after the instruction is fetched it will then be decoded
  - - - He was born in Budapest and died in Walter Reed hospital, Bethesda, Maryland, united states.
      - JOB: mathematician, physicist, inventor, educator.
    - - stored program computer
        
        a computer that stores program instructions in electronically or optically accessible memory
      - you can change the program without rewiring
        
        before, computers were fixed program machines
      - just an idea/ concept. not an actual computer
  - - - The bus is a set of wires or tracks laid down on a printed circuit board.
      - Their role is to carry data around the system.
    - - controls the way data moves around the cpu
      - controls/ moniters the way data flows between the cpu and other hardware components
      - executes instructions provided by the program
    - - handels the data proccessing
      - it performs standard arithmetic operations such as addition, subtraction etc.
      - it deals with logic and comparisons such as "is this value greater than that value".
    - - A register is a type of temporary memory located inside the CPU
      - it is faster to shift data to and from registers rather than RAM so it speeds up processing time.
      - there are many registers inside the CPU
    - - there can be both an internal cache (inside the CPU) and an external cache (outside the CPU)
      - another type of temporary memory
      - it is faster than RAM but slower to access than the registers
    - - The clock is a tiny quartz crystal inside the CPU which ticks at a steady speed.
      - Each time the clock ticks the CPU can process one instruction.
      - A typical clock has a speed of around 3GHz which means the CPU can carry out three thousand million instructions per second