Int 7F Fn 0D  - G8bpq V4.07+ - Host Mode - Allocate/deallocate Stream      [N]

   AH = 0Dh
   AL = stream number (01h-FFh)
   CL = function
       01h allocate stream

       Return: CX = status (0000h successful, else already in use)
       02h deallocate stream

See Also: AX=0D00h