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Write assembly language instructions to perform the following tasks:I. Set the register AX equal to zero.

Question

Write assembly language instructions to perform the following tasks:

I. Set the register AX equal to zero.

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Solution

To set the register AX equal to zero in assembly language, you can use the following instructions:

  1. Using MOV instruction:

    MOV AX, 0
    
  2. Using XOR instruction (a common method for clearing registers):

    XOR AX, AX
    

Explanation:

  • The MOV AX, 0 instruction directly moves the value 0 into the AX register.
  • The XOR AX, AX instruction performs an exclusive OR operation on the AX register with itself, which results in zero. This is often preferred for clearing registers as it can be more efficient on some architectures.

You can use either method to achieve the desired outcome of setting the AX register to zero.

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