MOV CX, 128 ; SEARCH 128 BYTES MOV AL, VALUE ; VALUE TO BE FOUND MOV AH, AL ; SAME VALUE IN AH MOV DI, OFFSET ; START OF MEMORY TO SEARCH DEC DI TOP: INC DI ; 2 clocks MOV AL, AH ; 2 clocks SUB AL, [DI] ; 14 clocks LOOPNZ TOP ; 19 clocks