Topic: Electronics Engineering
The content of the accumulator of 8085 microprocessor after execution of the following instructions will be
MVI A, A7H
ORA A
RLC
- A. FFH
- B. 4FH
- C. 3FH
- D. CEH
Answer: B. 4FH
Explanation: $A = 1010~0111$ (A7H). Logical OR with A: 1010 0111, CY=0. Before execution of instruction RLC: CY=0, A=1010 0111. After execution of instruction RLC (Rotate Left without Carry): CY=1, A=0100 1111 i.e., $4FH$.