Interrupt Assignments; Pci Slots - Asus Motherboard A8N-SLI Premium User Manual

2.5.3

Interrupt assignments

Standard interrupt assignments
IRQ
0
1
2
4
5
6
7
8
9
10
11
12
13
14
15
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
PCI slot 1
PCI slot 2
PCI slot 3
Onboard USB 1.0 controller
Onboard USB 2.0 controller
Onboard LAN1
Onboard LAN2
Onboard PCI SATA RAID (SI)
Onboard 1394a
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.
2.5.4

PCI slots

The PCI slots support cards such as
a LAN card, SCSI card, USB card, and
other cards that comply with PCI
specifications. The figure shows a
LAN card installed on a PCI slot.
2-16
Priority Standard Function
1 System Timer
2 Keyboard Controller
– Re-direct to IRQ#9
12 Communications Port (COM1)*
13 IRQ holder for PCI steering*
14 Floppy Disk Controller
15 Printer Port (LPT1)*
3 System CMOS/Real Time Clock
4 IRQ holder for PCI steering*
5 IRQ holder for PCI steering*
6 IRQ holder for PCI steering*
7 PS/2 Compatible Mouse Port*
8 Numeric Data Processor
9 Primary IDE Channel
10 Secondary IDE Channel
A
shared
— shared
—
shared
shared
shared
— shared
—
shared
B C D
— — —
— —
— shared —
— — —
— — —
— — —
— —
— — shared
— — —
Chapter 2: Hardware information
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