Question

The action performed by the following instruction of 8086 :

MOV [1234h], AX

1. Move contents of memory location 1234H to register AX
2. Move the contents of register AX to memory offset 1234H
3. Add contents at 1234H to register AX
4. Add contents of 1234H and AX and store the result in 1234H

Answer 1

Correct Answer - Option 2 : Move the contents of register AX to memory offset 1234H

mov [1234h], AX

It moves the contents of register AX to the memory offset 1234H

Note:

8086 μP supports the following types of Instructions:

Data copy/transfer instructions: These types of instructions are used to transfer data from source operand to destination operand.

Eg.: Move, load, store, exchange input and output instructions belong to this category.

Arithmetic instructions: These instructions are used to perform operations like addition, subtraction, multiplication & division

Eg.: ADD, SUB, MUL, DIV

Logical instructions: These instructions are used to perform operations like logical AND, OR, NOT, XOR

Machine control instructions: These instructions control the machine status: NOP, HLT, WAIT and LOCK instructions