Fetch-Decode-Execute Cycle

Question 1

Fetch

Answer 1

The PC contents are copied into the MAR

Instructions at address in Memory Address Register -> Memory Data Register -> Current Instruction Register

Question 2

Decode

Answer 2

Instruction is decoded into:

1. Operand -> The data to preform an instruction on
2. OP-Code -> The instruction

Question 3

Execute

Answer 3

Instruction executed
If data is being committed to memory, its held in the MDR
Cycle repeats until stop instruction