Von Neumann Architecture

Question 1

What does MAR stand for?

Answer 1

Memory Address Register

Question 2

What does the MAR do?

Answer 2

Holds any memory address about to be used by the CPU.

Question 3

What does MDR stand for?

Answer 3

Memory Data Register

Question 4

What does the MDR do?

Answer 4

Holds the data or instruction fetched from or waiting to be written to memory.

Question 5

What does PC stand for?

Answer 5

Program Counter

Question 6

What does the PC do?

Answer 6

Holds the memory address of the instruction for each cycle.

Question 7

What does the accumulator do?

Answer 7

Stores the results of the ALU.

Question 8

What does Von Neumann’s architecture describe?

Answer 8

A system where the CPU runs programs stored in memory.