Asus P2-P5945GC - Manual (Page 80)

5-25 ASUS P1/P2-P5945GC
LAN Option ROM [Disabled]
Allows you to enable or disable the option ROM in the onboard LAN
controller. This item appears only when the Onboard LAN item is set
to Enabled. Configuration options: [Disabled] [Enabled]
Serial Port1 Address [3F8/IRQ4]
Allows you to select the Serial Port1 base address.
Configuration options: [Disabled] [3F8/IRQ4] [2F8/IRQ3] [3E8/IRQ4]
[2E8/IRQ3]