Question

In which addressing mode, the address of the data is stored in a register pair?

• A. Direct addressing mode
• B. Memory indirect addressing mode
• C. Immediate addressing mode
• D. Register indirect addressing mode

Hint:

In register indirect addressing, \[ \boxed{ \text{Register pair } \rightarrow \text{Memory address } \rightarrow \text{Data} } \] Example (8085): \[ \boxed{\texttt{MOV A,M}} \] uses the HL register pair as the memory pointer.

Answer 1

The Correct Option is D

Step 1: Recall the addressing modes. In the register indirect addressing mode, the effective memory address is stored in a register pair (such as HL in the 8085 microprocessor).

Step 2: Identify the correct addressing mode. The processor accesses the data using the memory address contained in the register pair rather than specifying the address directly. Hence, \[ \boxed{\text{Register indirect addressing mode}} \] is the correct answer. Therefore, \[ \boxed{(D)} \] is the correct answer.