CPU 2 Flashcards
1
Q
What does the Von Neumann architecture describe?
A
A system where the CPU runs programs stored in the memory. Programs consist of instructions and data which are stored in memory addresses.
2
Q
What does the PC stand for and do?
A
Program counter
Holds the memory address of the instruction for each cycle
3
Q
What does MAR stand for and what does it do?
A
Memory address register
Holds any memory address about to be used by the CPU.
4
Q
What does MDR stand for and what does it do?
A
Memory data register
Holds the actual data or instruction.
5
Q
What does the accumulator do?
A
Stores intermediate results of calculations in the ALU
