Int 83 Fn 16  - Jm Pro Tracker V5.0 - ???                                  [s]

   AH = 16h
   AL = subfunction
       00h ???

       Return: BX = ???
           CX = ???
           DX = ???
           ES:DI -> ???
           CF indicates ???
       01h ???

       Return: BX = ???
           CX = ???
           DX = ???

Return: CF clear if successful
   CF set on error
       AX = error code (FFxxh) (see #3647)