A451 cpu fetch execute cycle (2-12 & 2-14)

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A451 cpu fetch execute cycle (2-12 & 2-14)

  1. 1. The Fetch Execute Cycle A451 – 2.12 Computer Hardware (CPU) 2.14 Representation of data (Instructions)
  2. 2. Get your brains logged on! <ul><li>What are the four main parts of a computer’s specification that affect performance? </li></ul><ul><li>What unit of measurement is used to measure cycles per second? </li></ul><ul><li>How many instructions can a CPU running at 1 gig process in 1 second? </li></ul>
  3. 3. Get your brains logged on! <ul><li>What are the four main parts of a computer’s specification that affect performance? </li></ul><ul><ul><li>Clock speed, cache size, number of cores and amount of RAM </li></ul></ul><ul><li>What unit of measurement is used to measure cycles per second? </li></ul><ul><ul><li>Hertz (Hz) </li></ul></ul><ul><li>How many instructions can a CPU running at 1 gig process in 1 second? </li></ul><ul><ul><li>1,000,000,000 (one thousand million) </li></ul></ul>
  4. 4. By the end of this lesson: <ul><li>All of you will be able to follow the steps involved in the Fetch Execute cycle of a CPU to carry out a simple calculation. </li></ul><ul><li>Most of you will understand what a bit pattern is and how they are used to create CPU instructions; and will be able to explain how the CPU knows the difference between instructions and data </li></ul><ul><li>A few of you will write your own CPU instructions to control the processor. </li></ul>
  5. 5. Motherboard CPU RAM INPUTS and OUTPUTS
  6. 6. Little Man Computer
  7. 7. Op codes for LMC 1 Load 2 Store 3 Add 4 Subtract 5 Input 6 Output 7 Halt
  8. 8. Lesson Objectives recap: <ul><li>All of you will be able to follow the steps involved in the Fetch Execute cycle of a CPU to carry out a simple calculation. </li></ul><ul><li>Most of you will understand what a bit pattern is and how they are used to create CPU instructions; and will be able to explain how the CPU knows the difference between instructions and data </li></ul><ul><li>A few of you will write your own CPU instructions to control the processor. </li></ul>

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