4 System BIOS70PCI-E Slot1 Option ROM: Select Enabled to enable PCI Express Slot1Option ROM. This will boot the computer using a network interfaceunless PCI-E Slot 1 is populated with a graphics device.PCI IDE BusMaster: When Enabled, the BIOS uses PCI bus mastering forreading/writing to IDE drives.Load Onboard LAN1 Option ROM/Load Onboard LAN2 Option ROM:Select Enabled to enable the onboard LAN1 or LAN2 Option ROM. Thisis to boot computer using a network interface.Onboard LAN Option ROM Select: Select iSCSI to use the iSCSI OptionROM to boot the computing using a network device. Select PXE to usethe PXE Option ROM to boot the computer using a network device.Boots Graphic Adapter Boot Priority: This feature allows you to selectthe graphics adapter to be used as the primary boot device.Super IO Device configurationSerial Port1 Address/ Serial Port2 Address: This option specifies thebase I/O port address and the Interrupt Request address of Serial Port 1and Serial Port 2. Select Disabled to prevent the serial port fromaccessing any system resources. When this option is set to Disabled, theserial port physically becomes unavailable. Select 3F8/IRQ4 to allow theserial port to use 3F8 as its I/O port address and IRQ 4 for the interruptaddress.