Intel System Board G4H875-N - Manual (Page 82)

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BIOS Setup
Onboard Serial Port 3 (G4H875-N only)
This field is used to select the serial port 3’s I/O address.
Onboard Serial Port 3 IRQ (G4H875-N only)
This field is used to select the serial port 3’s IRQ address. This field
is not configurable if the “Onboard Serial Port 3” field is set to
Disabled.
Onboard Serial Port 4 (G4H875-N only)
This field is used to select the serial port 4’s I/O address.
Onboard Serial Port 4 IRQ (G4H875-N only)
This field is used to select the serial port 4’s IRQ address. This field
is not configurable if the “Onboard Serial Port 4” field is set to
Disabled.
3.1.4.4 Onboard LAN Boot 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 and
keys simultaneously when prompted during boot-up. Take
note: you will be able to access the boot ROM’s program (by typing
+ ) only when this field is enabled.