Acer AB460 F1 - Manual (Page 204)

3 Server Blades: Setup and Installation 184
Super IO Device configuration
Figure 3-119. Super IO Device 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.