How to change supervivi's serial port (broken )

csle12
Hello everyone.
My mini2440 board's default COM port had just failed to operate. It didn't
show anything. So I wonder is there any way to get supervivi change to
another COM port. I've searched around, but they said that supervivi is
closed source, so we can't modified it. Is there any binary already built
for another port?
Regards.