Question

54. The instruction, MOV AX,[BX] is an example of

(A) direct addressing mode

(B) register addressing mode

(C) register relative addressing mode

(D) register indirect addressing mode​

Answer 1

) register indirect addressing mode

Answer 2

Answer:

The instruction, MOV AX,[BX] is an example of register indirect addressing mode​.

Therefore, option (D) register indirect addressing mode​ is the correct option.

Addressing modes in 8086 microprocessor:

1. Register addressing mode

MOV AX , DX

ADD AL , CL

2. Immediate addressing mode

MOV AL , 3FH

ADD AX , 0E31H

3. Displacement addressing mode

MOV AL , [2000H]

4. Register indirect addressing mode

MOV AX , [BX]

ADD DL , [SI]

5. Based indexed addressing mode

MOV AX, [BP + DI]

MOV DL , [BX + SI]

6. Indexed addressing mode

MOV AX, [DI + 2000H]

MOV DL , [SI + 5050H]

7. Based addressing mode

MOV AX, [BP + 1000H]

MOV DL , [BX + 0500H]

8. Based indexed displacement addressing mode

MOV AX, [BP + DI + 1000H]

MOV DL , [BX + SI + 0100H]

9. String addressing mode

MOVS W

MOVS B

10. Input / Output addressing mode

OUT A, 32

IN A, 20