若AX=5555H，BX=FF00H，试问在下列程序段执行后，AX=？BX=？CF=？
AND     AX， BX                  ； AX = 5500，BX = FF00H 
XOR     AX， AX                  ； AX = 0000H             
NOT     BX                      ； BX = 00FFH