DFI G5C900-B - Manual (Page 56)

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COM Express Board
Serial Port 1 Mode
COM 1 functions as a serial port or IrDA. You cannot use both at
the same time.
Normal This option sets COM 1 as serial port.
IrDA This option sets COM 1 as IrDA.
Serial Port 1 Use IRQ, Serial Port 2 Use IRQ, Serial Port 3 Use
IRQ and Serial Port 4 Use IRQ
These fields are used to select an IRQ for the onboard serial port 1,
2, 3 or 4.
W83627HF/HG.WDT Time
This field is used to select the time interval of the Watchdog timer. If
the system hangs or fails to function, it will reset at the set time
interval so that your system will continue to operate.
GLAN ROM
Enable this field if you wish to use the boot ROM (instead of a disk
drive) to boot-up the system and access the local area network
directly. If you wish to change the boot ROM’s settings, type the
<Shift> and <F10> keys simultaneously when prompted during
boot-up. Take note: you will be able to access the boot ROM’s
program (by typing <Shift> + <F10>) only when this field is
enabled.