Which CPU register stores the address of the memory location currently being accessed for a Read or Write operation?

Subject: Computer Architecture and Organization

Topic: Register Transfer & Microoperations

Options:

1. Option A: Program Counter (PC)
2. Option B: Memory Data Register (MDR)
3. Option C: Memory Address Register (MAR)
4. Option D: Instruction Register (IR)

Correct Answer:

Option C: Memory Address Register (MAR)

Explanation:

The Memory Address Register (MAR) holds the memory address that the CPU wants to read from or write to over the address bus.