Int 7F Fn 564D  U - Voyetra Multimedia Player - Vmp.exe Api                [s]

   AX = 564Dh ('VM')
   BH = C1h
   BL = function (00h-1Bh)
       00h ???

       Return: CF clear
           AX = 0000h
   ???

Return: AX = FFFFh if invalid function
   ???

See Also: AX=4331h,AX=5658h