def string_from_point(m, x, y)
      m = to_nibble(m)
      x = to_nibble(x)
      byte = [(m << 4) + x].pack("C")
      byte + be_from_int(y)
    end
def string_from_point(m, x, y)
      m = to_nibble(m)
      x = to_nibble(x)
      byte = [(m << 4) + x].pack("C")
      byte + be_from_int(y)
    end
Returns mmmmxxxx yyyyyyyy yyyyyyyy ... (16 bytes of y)