PCI 2.1 Support [Enabled]

This field allows you to enable or disable the PCI 2.1 features. Keep the default setting [Enabled] if you installed PCI 2.1 compliant cards. Set to [Disabled] if you installed any card that is not PCI 2.1 compliant.

Configuration options: [Disabled] [Enabled]

Onboard PCI IDE [Both]

This field allows you to enable either the primary IDE channel or secondary IDE channel, or both. You can also set both channels to [Disabled]. Configuration options: [Both] [Primary] [Secondary] [Disabled]

IDE Bus Master Support [Enabled]

This field allows you to enable or disable the IDE bus master feature. Configuration options: [Disabled] [Enabled]

4.4.2I/O Device Configuration

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Chapter 4: BIOS information

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Asus P4 533 2 I/O Device Configuration, PCI 2.1 Support Enabled, Onboard PCI IDE Both, IDE Bus Master Support Enabled