Asus P4B533 - Manual (Page 95)

ASUS P4B533 motherboard user guide 4-27
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]
4.4.3.1 PCI IRQ Resource Exclusion
USB 2.0 Controller [Enabled]
This field allows you to enable or disable the onboard USB 2.0 controller.
Set to [Enabled] if you wish to install USB 2.0 devices. Configuration
options: [Disabled] [Enabled]
Primary VGA BIOS [PCI VGA Card]
This field allows you to select the primary graphics card. Configuration
options: [PCI VGA Card] [AGP VGA Card]
Onboard PCI Audio Controller [Enabled]
This field allows you to enable or disable the onboard PCI audio controller.
Configuration options: [Disabled] [Enabled]