Asus P5LD-MR User Manual - Page 37

Interrupt assignments

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2.5.3 Interrupt assignments Standard interrupt assignments IRQ Priority Standard Function 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 System Timer Keyboard Controller Re-direct to IRQ#9 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 IDE Controller PIRQC# SATA Host Controller PIRQD# SMBus Controller PIRQD# USB UHCI Host controller #1 PIRQE# USB UHCI Host controller #2 PIRQF# USB UHCI Host controller #3 PIRQC# USB UHCI Host controller #4 PIRQD# USB EHCI Host controller PIRQE# BCM5753A #1 PIRQA# BCM5753A #2 PIRQB# PCI slot 1 PIRQG# PIRQF# PIRQE# PIRQH# PCI slot 2 PIRQF# PIRQE# PIRQH# PIRQG# PCI E x 8 slot PIRQA# PIRQB# PIRQC# PIRQD# PCI E x 16 slot PIRQA# PIRQB# PIRQC# PIRQD# REQ# REG0# REG1# GNT# GNT0# GNT1# ASUS P5LD-MR 2-17

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ASUS P5LD-MR
2-17
2.5.3 Interrupt assignments
IRQ
Priority
Standard Function
0
1
System Timer
1
2
Keyboard Controller
2
—
Re-direct to IRQ#9
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
* These IRQs are usually available for ISA or PCI devices.
Standard
interrupt assignments
PCI Bus Number, IDSEL, and IRQ assignments
Description
INTA
INTB
INTC
INTD
REQ#
GNT#
IDE Controller
PIRQC#
SATA Host Controller
PIRQD#
SMBus Controller
PIRQD#
USB UHCI Host controller #1
PIRQE#
USB UHCI Host controller #2
PIRQF#
USB UHCI Host controller #3
PIRQC#
USB UHCI Host controller #4
PIRQD#
USB EHCI Host controller
PIRQE#
BCM5753A #1
PIRQA#
BCM5753A #2
PIRQB#
PCI slot 1
PIRQG# PIRQF#
PIRQE#
PIRQH#
REG0# GNT0#
PCI slot 2
PIRQF# PIRQE#
PIRQH#
PIRQG#
REG1# GNT1#
PCI E x 8 slot
PIRQA# PIRQB#
PIRQC#
PIRQD#
PCI E x 16 slot
PIRQA# PIRQB#
PIRQC#
PIRQD#