Int 17 Fn 0D  U - Emulaser Eltsr - Get True Scrllk State                   [P]

   AH = 0Dh

Return: AX = state (0000h off, 0010h on)
Desc:  determine the actual state of ScrlLk even when Emulaser is controlling
     the ScrlLk light as its activity indicator

See Also: AH=0Ch,INT 16/AH=02h,INT 1A/AH=E5h