Von Neumann architecture

Question 1

What is Von Neumann architecture

Answer 1

It’s where both the data and software that are currently being used are stored in computer memory (RAM), a.k.a. stored program

Question 2

What is the layout of Von Neumann architecture

Answer 2

Memory holds both data and program, CU and ALU under it, Input and output under ALU, All trade info apart from input and output

Question 3

What features are in Von Neumann architecture

Answer 3

There is enough memory available to hold both programs and data. This makes it easy to change task by loading a different program. In modern computers this memory is RAM. Data and instructions are carried on buses

Question 4

What registers are in a CPU

Answer 4

Memory Data Register (MDR), Program counter, Accumulator, many general purpose registers, memory address registers (MAR)

Question 5

What is the MDR

Answer 5

The MDR is where data is temporarily stored when it’s on its way to the CPU or RAM.

Question 6

What is the MAR

Answer 6

The address of the data/instruction being accessed is temporarily stored in the memory address register

Question 7

What is the PC

Answer 7

As each instruction is processed, the software that is currently running updates the program counter with the address of the next instruction to fetch. The program counter then passes this next address to the memory address register as part of the standard fetch/decode/execute cycle

Question 8

What is the Accumulator

Answer 8

The Accumulator is used to temporarily store data whilst calculations are being performed within the Arithmetic Logic Unit (ALU)