Question

what is the purpose of 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.

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Answer 2

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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.