Question

what is the purpose of the MAR? ​

Answer 1

Memory address register (MAR) - holds the address of the current instruction that is to be fetched from memory, or the address in memory to which data is to be transferred. memory data register (MDR) - holds the contents found at the address held in the MAR, or data which is to be transferred to primary memory.

Answer 2

(MAR) - holds the address of the current instruction that is to be fetched from memory, or the address in memory to which data is to be transferred.