Asus KFN32-D SLI SAS User Guide - Page 38

Interrupt assignments

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2.5.3 Interrupt assignments Standard interrupt assignments IRQ Priority 0 1 1 2 2 - 3 11 4 12 5 13 6 14 7 15 8 3 9 4 10 5 11 6 12 7 13 8 14 9 15 10 Standard Function System Timer Keyboard Controller Programmable interrupt Communications Port (COM2) Communications Port (COM1)* IRQ holder for PCI steering* Floppy Disk Controller Printer Port (LPT1)* System CMOS/Real Time Clock IRQ holder for PCI steering* IRQ holder for PCI steering* IRQ holder for PCI steering* PS/2 Compatible Mouse Port* Numeric Data Processor Primary IDE Channel Secondary IDE Channel * These IRQs are usually available for ISA or PCI devices. PCI Bus Number, IDSEL, and IRQ assignments Description INTA INTB INTC INTD PCI slot 1 IRQF# PCI E x16 slot IRQA# PCI E x1 slot IRQA# PCI E x16 slot IRQA# Onboard USB controller 1 IRQA# Onboard USB controller 2 IRQF# Onboard SATA controller 1 IRQF# Onboard SATA controller 2 IRQ5# Onboard SATA controller 3 IRQB# Onboard PCI E X1 LAN1 IRQ5# Onboard PCI E X1 LAN2 IRQF# Onboard 1394 IRQB# REQ# GNT# REQ0# GNT0# REQ2# GNT2# 2-18 Chapter 2: Hardware information

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2-18
Chapter 2: Hardware information
2.5.3 Interrupt assignments
Standard
interrupt 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
IRQ holder for PCI steering*
6
14
Floppy Disk Controller
7
15
Printer Port (LPT1)*
8
3
System CMOS/Real Time Clock
9
4
IRQ holder for PCI steering*
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
Description
INTA
INTB
INTC
INTD
REQ#
GNT#
PCI slot 1
IRQF#
REQ0# GNT0#
PCI E x16 slot
IRQA#
PCI E x1 slot
IRQA#
PCI E x16 slot
IRQA#
Onboard USB controller 1
IRQA#
Onboard USB controller 2
IRQF#
Onboard SATA controller 1
IRQF#
Onboard SATA controller 2
IRQ5#
Onboard SATA controller 3
IRQB#
Onboard PCI E X1 LAN1
IRQ5#
Onboard PCI E X1 LAN2
IRQF#
Onboard 1394
IRQB#
REQ2# GNT2#
PCI Bus Number, IDSEL, and IRQ assignments