How to select the COM port mode in BIOS?


Please following the steps to modify the COM port mode from the bios.

Step 1:

Turn on the computer and then press to enter the BIOS Setup Menu during the boot-up. Under the Advanced item, select option AU4 COM RS232/485/422 select.  


Step 2:

You can see the COM1/COM2 ports.


Step 3:

Select the COM port mode you want.