Registers Flashcards
1
Q
What are the 4 registers?
A
PC (program counter)
ACC (Accumulator)
MDR (Memory Data Register)
MAR (Memory Address Register)
2
Q
What does the program counter do?
A
Holds memory address of next instruction
3
Q
What does the memory address register do?
A
Holds memory address of current instruction
4
Q
What does the memory data register do?
A
Holds instructions/data currently in process
5
Q
What does the accumulator do?
A
Results of calculations are added to this
