System Architecture

Question 1

What are the 4 registers inside Von Neumann Architecture?

Answer 1

Program Counter
Memory Address Register
Memory Data Register
Accumulator

Question 2

What is the function of the Program Counter?

Answer 2

Holds the address of the next instruction being executed

Question 3

What is the function of the MAR?

Answer 3

Holds the memory address of the current instructions

Question 4

What is the function of the MDR?

Answer 4

Holds the contents found in MAR.
It holds the actual instruction, and then the data that has been fetched from memory

Question 5

What is the function of the ACC?

Answer 5

It hold the results of an instruction

Question 6

What is the function of the ALU?

Answer 6

A component of the CPU that performs arithmetic and logic calculations. The arithmetic performs simple math calculations and logic performs logical decisions

Question 7

What is the function of the CU?

Answer 7

Manages the F-D-E cycle

Manages the input and output signals ensuring these are dealt with correctly