1
Q
What does PC stand for?
A
Program Counter
2
Q
What does the PC do?
A
It is the address of the next instruction in memory
3
Q
What does MAR stand for?
A
Memory Address Register
4
Q
What does the MAR do?
A
Address of next instruction during fetch phase or can be the address to retrieve data from during execute phase
5
Q
What does MDR stand for?
A
Memory Data Register
6
Q
What is a register?
A
Areas of memory in the CPU
7
Q
What does the MDR do?
A
Holds the current data that has been fetched from memory or is about to be stored in memory
8
Q
What is another name for the MDR?
A
Memory Buffer Register
9
Q
What does CIR stand for?
A
Current Instruction Register
10
Q
What does the CIR do?
A
Holds instruction to be executed
11
Q
What does ACC stand for?
A
Accumulator
12
Q
What does the ACC do?
A
Holds the result of the current calculation
