Int 67 Fn 5857  U - Netroom??? - ???                                       [m]

   AX = 5857h
   BX = function??? (0057h,0059h,0159h seen)
   ???

Return: ???

Note:  BX=0059h appears to be analogous to AX=5800h and BX=0159h appears to
     be analogous to AX=5801h; BX=0057h appears to indicate whether
     AX=580xh or AX=5857h/BX=0x59h should be used

See Also: AX=5BF0h