22. MOV, Data Transfer Instructions

• The MOV instruction copies the source operand to the destination operand without affecting the source.

• Five types of operand combinations are allowed with MOV:

      Instruction type             Example
      --------------------------   ------------------
      mov   register, register     mov   DX,  CX
      mov   register, immediate    mov   BL,  100
      mov   register, memory       mov   EBX, [count]
      mov   memory, register       mov   [count], ESI
      mov   memory, immediate      mov   [count], 23
  

• Note: the above operand combinations are valid for all instructions that require two operands.