Acer AR380 F1 - Manual (Page 104)

4 System Bios 86
Super IO Configuration
Serial Port1 Address/ Serial Port2 Address: This option specifies the
base I/O port address and the Interrupt Request address of Serial Port 1
and Serial Port 2. Select Disabled to prevent the serial port from
accessing any system resources. When this option is set to Disabled, the
serial port physically becomes unavailable. Select 3F8/IRQ4 to allow the
serial port to use 3F8 as its I/O port address and IRQ 4 for the interrupt
address.
Serial Port 2 Attribute: Select COM to configure the onboard COM2
port as a normal serial port. Select SOL (Serial Over_LAN) to configure
the onboard COM2 port as a virtual COM port for SOL use.