Int 17 Fn 0500  U - Emulaser Eltsr - ???                                   [P]

   AX = 0500h
   ???

Return: AX = unload status (0001h safe to unload, 0002h not safe)
   BX = ???
   CX = PSP segment of ELTSR
   DX = activity flag (0000h disabled, 0001h capturing, 0002h ???printing)
   SI = ???
   DI = ???

See Also: AH=04h,INT 1A/AH=E5h