Setup and Operation 2-19
IRQ Reservation
Use this field to reserve specified IRQs for legacy ISA boards. Select “Reserved”
to choose an IRQ. The default for each IRQ is “Available.” The following list
includes the reservable IRQs:
IRQ 3
IRQ 4
(Serial Port A
COM1)
IRQ 5
(Audio)
IRQ 7
(Parallel Port
LPT1)
IRQ 10
IRQ 11
IRQ 14 (Present only if secondary IDE channel is disabled)
IRQ 15 (Present only if secondary IDE channel is disabled).
Peripheral Configuration
Adjustments must sometimes be made in the Setup Utility when peripheral devices are
added, removed or changed.
Use the fields in the following list to configure the system when making any peripheral
configuration changes.
Serial Ports A and B
Selectable parameters for these fields are “Disabled,” “Enabled,” and “Auto.” The
default setting for Serial Port A is “Enabled.” The default setting for Serial
Port B supports the hardware shipped in the system. (For instance, if the system
shipped with a fax/modem board, Serial Port B defaults to “Disabled.) The serial
ports can be auto detected by choosing “Auto.” The “Auto” parameter enables
the serial device, but the BIOS will not place its resources unless the “PnP OS”
field is set to “No.”
Use the Enabled setting if you want to choose a specific address for the serial
port. The following options become available:
Base I/O address
Available addresses include “3F8h” (Serial Port A default), “2F8h” (Serial
Port B default), “3E8h,” and “2E8h.”
Interrupt
Available IRQs include “IRQ4” (Serial Port A default) and “IRQ3” (Serial
Port B default).
NOTE:
When an option is selected for more
than one serial port, that selection appears with
an asterisk, indicating a conflict.