Question

The content of register (B) and register (C) of 8085 microprocessor are 0AFH and 0BH. It is desired to multiply the content of register B and register C and store the results in accumulator. A part of 8085 program for this purpose is given as : \[ \texttt{MVI A,00H} \] \[ \texttt{LOOP : _________} \] \[ \texttt{_________} \] \[ \texttt{_________} \] \[ \texttt{HLT} \] A sequence of instructions to complete the program would be :

• A. JNZ LOOP, ADD B, DCR C
• B. ADD B, JNZ LOOP, DCR C
• C. DCR C, JNZ LOOP, ADD B
• D. ADD B, DCR C, JNZ LOOP

Hint:

8085 multiplication logic: \[ \text{Multiplication}=\text{Repeated addition} \] Typical loop structure: \[ \texttt{ADD operand} \] \[ \texttt{DCR counter} \] \[ \texttt{JNZ LOOP} \]

Answer 1

The Correct Option is D