Ide Configuration Submenu - Dell Dimension 2100 System Reference Manual

Interrupt
Legacy Set to Disabled if legacy USB support is not desired. Auto (default)
USB and Enabled allow support for legacy USB.
Support
IRQ5 Reserved (default) indicates that the IRQ is reserved for use by legacy
devices. Availableindicates that a specific IRQ is available on the
computer.

IDE Configuration Submenu

Table 5. IDE Configuration Submenu Options
Option Function
IDE Configures the integrated primary and secondary IDE controllers and
Controller detects the types of drives attached to them. If set
to Primary, Secondary, or Both, the designated controller(s) are
enabled, and the types of drives attached are displayed. If set to
eitherPrimary or Secondary, the other controller is not enabled and the
IRQ it normally uses becomes available. If set to Disabled, the computer
cannot detect any drives attached to the controllers and
displays None for all four IDE drive options.
If port is set to Enabled, available interrupts are 7 and 5.