Computer Science for IGCSE & O level - Hardware (Section 5 - No. 46)
What is the purpose of the Memory Data Register (MDR)?
To store the address of the memory location to be accessed.
To hold the instruction currently being executed.
To hold the data being transferred between the CPU and memory.
To decode the instructions.
Paliwanag
The MDR holds the data that is currently being transferred to or from memory.