Chapter 2: Hardware setup
2-16
2.5.4
Configuring an
expansion.card
After installing the expansion card, configure the it by adjusting the software
settings.
1. Turn on the system and change the necessary BIOS settings, if any. See
Chapter 5 for information on BIOS setup.
2. Assign an IRQ to the card. Refer to the following tables.
3. Install the software drivers for the expansion card.
Standard.interrupt.assignments
When using PCI cards on shared slots, ensure that the drivers support “Share
IRQ” or that the cards do not need IRQ assignments. Otherwise, conflicts will
arise between the two PCI groups, making the system unstable and the card
inoperable.
PCI.Bus.Number,.IDSEL,.and.IRQ.assignments
*These IRQs are usually available for ISA or PCI devices.
IRQ
Priority
Standard function
0
1
System Timer
1
2
Keyboard Controller
2
-
Programmable Interrupt
3*
11
Communications Port (COM2)
4*
12
Communications Port (COM1)
5*
13
--
6
14
Floppy Disk Controller
7*
15
--
8
3
System CMOS/Real Time Clock
9*
4
ACPI Mode when used
10*
5
IRQ Holder for PCI Steering
11*
6
IRQ Holder for PCI Steering
12*
7
PS/2 Compatible Mouse Port
13
8
Numeric Data Processor
14*
9
Primary IDE Channel
15*
10
Secondary IDE Channel
INTA#
INTB#
INTC#
INTD#
REQ#
GNT#
PATA controller
PIRQA#
SATA controller
PIRQD#
SMBus controller
PIRQB#
USB UHCI controller 1 PIRQH#
USB UHCI controller 2 PIRQD#
USB 2.0 EHCI controller PIRQH#
BCM5721 #1
PIRQA#
BCM5721 #2
PIRQB#
XG2 Z9s
PIRQF#
PCI Express Slot 1
PIRQA#
PCI Express Slot 2
PIRQA#
