Question

Consider the following statements :
A. MOV A, M copies data from memory (pointed by HL) to accumulator

B. LXI H, 2025H loads 2025H into register pair HL

C. STA 2050H stores the accumulator content into memory at address 2050H

D. LDA 2050H loads HL with the contents of memory location at 2050H

Choose the correct answer from the options given below :

• A. A, B, C only
• B. B, C, D only
• C. A, D only
• D. A, C, D only

Hint:

In 8085, the 'M' in instructions always refers to the memory location pointed to by the HL register pair.

Answer 1

The Correct Option is A

This question tests knowledge of the 8085 microprocessor instruction set. 1. Analyzing A, B, and C:
• A: MOV A, M moves data from the memory location specified by the HL register pair into the accumulator. This is correct.
• B: LXI H, 2025H is Load Register Pair Immediate. It loads the 16-bit value 2025H into the HL pair. This is correct.
• C: STA 2050H is Store Accumulator Direct. It copies the content of the accumulator to memory address 2050H. This is correct. 2. Analyzing D:
• D: LDA 2050H is Load Accumulator Direct. It loads the Accumulator, not the HL pair, with the data from address 2050H. Thus, D is incorrect. Conclusion: Statements A, B, and C are correct.