the fetch-execute-decode cycle

Question 1

What happens during the fetch part of the cycle?

Answer 1

The instruction is copied from the program counter to the MAR. It is then copied from the MAR to the MDR.

Question 2

What happens during the decode part of the cycle?

Answer 2

The instruction is decoded by the control unit. It then prepares for the next step.

Question 3

What happens during the execute part of the cycle?

Answer 3

The instruction is performed.