Asus P4S533-E - Manual (Page 83)

ASUS P4S533-E motherboard user guide 67
Onboard PCI IDE Enable [Both]
This field enables 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 [Enable]
This field enables or disables the IDE Bus Master Capability under the
DOS environment. Configuration options: [Enabled] [Disabled]