User`s manual

PICO121 AMD G-Series Embedded SoC Pico-ITX Board
AMI BIOS Setup Utility 55
 Serial Port 1 (COM1)
Serial Port
Enable or disable serial port 1. The optimal setting for base I/O address is 3F8h and for
interrupt request address is IRQ4.
COM Mode
Use this option to set RS-232/RS-422/RS-485 communication mode for serial port 1.