CPU

CPU

1. ALU

   • Carries addresses from the processor to memory and input and output devices.
   • Handles all the arithmetic/ logical operations.

2. Address bus

   • Carries addresses from the processor to memory and input and output devices.

3. control unit

   • Coordinates all the activities taking place inside the CPU.
   • Shift operations e.g the bits in a computer word can be shifted left or right by a certain number of places.

4. clock speed

   • measures how many fetch/execute/decode cycles happen every second

5. cpu

   • Processes instructions and executes them

6. Cores

   • Separate processors More cores more information processed at same time

7. Cache size

   • fast memory that stores most commonly used instructions

8. Data Bus

   • Sends data between the processor, memory and input/output devices.

9. Control Bus

   • Carries signals to coordinate all the computer activities.

10. Register

    • A register is a very fast memory location within the CPU.

11. Memory address register (MAR)

    • Holds the address (location in memory) of the instructions or piece of data to be fetched or stored. Memory

12. Memory Data register (MDR)

    • The fetched instruction is temporarily held here.

13. Program counter (PC)

    • holds the memory address of the next instruction to be processed.

14. Current instruction Register (CIR)

    • holds the current instruction to be executed, which has been copied from MDR.

15. Accumulator

    • All calculations are carried out here