CMPS 002 - Computer Literacy

Prof. Paulo Franca

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Datacare   Ahshay

 

The Processor (CPU)

Each type of computer can be designed differently, but those are usual features of a CPU:

  • Can store information in special registers (ex. ACC = accumulator).
  • Can perform arithmetic operations: + - x / using one value in the accumulator and one value from memory
  • Can transfer information between CPU registers and memory
  • Executes instructions, one at a time, fetching them from memory
  • Address bus and data bus are electrical lines used to communicate between processor and memory
  • Instructions may consist of several steps. Each step is executed during a clock cycle
  • Clock: Tics (and tacs) at precise intervals; the faster the clock, the faster things will happen in the computer.
  • Clock speed is measured in Cycles per Second or Hertz. 1MHz is one million cycles per second.