Quote Originally Posted by sky071022 View Post
By the way, do we have to do something to the jumper setting for reflashing the VDIP1? Which mode of jumper should we use?
If you are using serial mode then the two sets of jumpers with three pins should be jumped across 1 and 2 or 2 and 3. It does not matter as long as both are the same.

How do we know that the Firmware has been loaded in successfully?
The easy way I think is to connect pin 6 through a level shifter (max232) and monitor the VDIP on a terminal. It does not take long to update/change the firmware, small file.

For that matter , use a terminal to learn how the VDIP works, practice sending commands and reading the feed back.