Asus P4B-LS Motherboard DIY Troubleshooting Guide - Page 87
PCI IRQ Resource Exclusion
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Onboard LAN Boot ROM [Disabled] This field allows you to enable or disable the boot ROM on the onboard LAN chipset. Set this field to [Enabled] if you wish to use the onboard LAN boot ROM. Configuration options: [Disabled] [Enabled] ONB SCSI BIOS First [No] When set to [Yes], this field allows the onboard SCSI BIOS to start up before the PCI devices. When set to [No], the onboard SCSI BIOS starts up after the PCI devices have been initialized. Configuration options: [No] [Yes] 4.4.3.1 PCI IRQ Resource Exclusion IRQ XX Reserved [No/ICU] These fields indicate whether or not the displayed IRQ for each field is being used by a legacy (non-PnP) ISA card. The setting [No/ICU] for an IRQ field indicates that you are using the ISA Configuration Utility (ICU), and that this particular IRQ is NOT required by a legacy ISA card. Set the IRQ field to [Yes] if you install a legacy ISA card that requires a unique IRQ and you are NOT using ICU. Configuration options: [No/ICU] [Yes] ASUS P4B-LS motherboard user guide 4-23