Computer Science for IGCSE & O level - Hardware (Section 4 - No. 49)
What is the purpose of the Memory Data Register (MDR)?
To hold the address of the memory location being accessed.
To hold the data being read from or written to memory.
To hold the instruction being executed by the CPU.
To control the data flow between the CPU and memory.
Explication
The MDR holds the data that is currently being transferred to or from memory.