Fetch-execute cycle

Question 1

What are the full names of the pecial purpose registers used in the fetch part of the fetch-execute cycle

Answer 1

Program Counter
Memory Address Register
Memory Buffer Register
Current Instruction Register

Question 2

What is the purpose of the MAR?

Answer 2

Enter answer here

Question 3

What is the purpose of the Program Counter?

Answer 3

To know which address you need to go to. It will also be incremented by 1 each cycle.

Question 4

What does MAR stand for?

Answer 4

Memory address register

Question 5

What is the CIR?

Answer 5

Current instruction register

Question 6

What do the terms op code and operand mean?

Answer 6

Op code: the instruction to be performed

Operand: the data for the instruction

Question 7

What is the purpose of the status register?

Answer 7

Store the status result from executing an instruction

Question 8

What are 3 types of data that can make up an operand?

Answer 8

Value, memory address or

register