von neumann Flashcards
1
Q
Function of PC
A
Holds address of next instruction to be fetched
2
Q
Function of MAR
A
Holds address of next instruction to be fetched/next data item to be transferred to memory
3
Q
Function of MDR
A
Holds instruction/data fetched from memory or data about to be transferred to memory
4
Q
Function of CIR
A
Holds instruction currently being decoded/executed
5
Q
Function of ACC
A
Holds results of processing
6
Q
What are the 3 buses
A
Address, control, data
7
Q
How are instructions and data stored/carried in Von Neumann architecture?
A
Stored in the same memory, carried on the same bus
8
Q
How are instructions performed in Von Neumann?
A
In order (serially)
9
Q
What is the difference between the MAR and the MDR?
A
MAR tells memory where to find data, MDR holds data being stored
