TEST : Logical Compare Instruction: The TEST instruction performs bit by bit logical AND operation on the 2 operands. Each bit of the result is then set to value I, if the equivalent bits of both operands are I, else the result bit is reset to  value 0. The result of this ending operation is not available for further use) but flags are affected. The affected flags are CF, OF, WF, SF and PF. The operands might be registers, immediate data or memory. The instance of this instruction are as follows:

Example :

1.  TEST       AX,         BX

2.  TEST       [0500], 06H

3.  TEST       [BX]       [Dl],       CX