Asus P5B - Manual (Page 42)

2-8 Chapter 2: Hardware information
2.5.3 Interrupt assignments
Standard interrupt assignments
IRQ Priority Standard Function
0  System Timer
 2 Keyboard Controller
2 — Re-direct to IRQ#9
 2 IRQ holder for PCI steering*
  Communications Port (COM)*
5  IRQ holder for PCI steering*
6 5 Floppy Disk Controller
7 6 Printer Port (LPT)*
8  System CMOS/Real Time Clock
9  ACPI*
0 5 SMBus Controller*
 6 IRQ holder for PCI steering*
2 7 PS/2 Compatible Mouse Port*
 8 Numeric Data Processor
 9 IDEIRQ (legacy mode, combined mapped as primary),
SMasterATA (Master), SATA (Secondary)
5 0 IDEIRQ (legacy mode, combined mapped as secondary),
SATA2 (Master), SATA (Secondary)
* These IRQs are usually available for PCI devices.
IRQ assignments for this motherboard
A B C D E F G H
PCI — — — — — shared — —
PCI2 — — — — — — shared —
PCI — — — — — — — shared
PCIEX6_ shared — — — — — — —
PCIEX_ shared — — — — — — —
PCIEX_2 — shared — — — — — —
PCIEX_ — — shared — — — — —
On-board ESATA, SATA_RAID shared — — — — — — —
On-board PRI_IDE — shared — — — — — —
On-board HD Audio (ADI988A) — — — — — — shared —
On-board GbEthernet (RTL8B) — — — shared — — — —
USB 2.0 EHCI# — — — — — — — shared
USB2 OBCI# — — — — — — — shared
USB OBCI#2 — — — shared — — — —
USB56 OBCI# — — shared — — — — —
USB 2.0 EHCI# — — shared — — — — —
USB78 OBCI# — shared — — — — — —
USB90 OBCI#5 shared — — — — — — —
SATA, SATA2 (ICH8) — — — shared — — — —
SATA, SATA (ICH8) — — — shared — — — —