Asus pch-dl motherboard 2-17 – Asus PCH-DL User Manual
Page 35
ASUS PCH-DL motherboard
2-17
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.
Standard interrupt assignments
IRQ assignments for this motherboard
IRQ
Priority
Standard Function
0
1
System Timer
1
2
Keyboard Controller
2
N/A
Programmable Interrupt
3*
11
Communications Port (COM2)
4*
12
Communications Port (COM1)
5*
13
Sound Card (sometimes LPT2)
6
14
Floppy Disk Controller
7*
15
Printer Port (LPT1)
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
*
These IRQs are usually available for ISA or PCI devices.
INTA#
INTB#
INTC#
INTD#
PCI slot 1
IRQ_F#
IRQ_G#
IRQ_H#
IRQ_E#
PCI slot 2
IRQ_G#
IRQ_H#
IRQ_E#
IRQ_F#
PCI slot 3
IRQ_H#
IRQ_E#
IRQ_F#
IRQ_G#
PCI-X slot 1
PI_IRQ0#
PI_IRQ1#
PI_IRQ2# PI_IRQ3#
PCI-X slot 2
PI_IRQ1#
PI_IRQ2#
PI_IRQ3# PI_IRQ0#
AGP Pro/8X slot
IRQ_A#
IRQ_B#
—
—
Onbd. USB controller #1
IRQ_A#
—
—
—
Onbd. USB controller #2
IRQ_D#
—
—
—
Onbd. USB controller #3
IRQ_C#
—
—
—
Onbd. USB controller #4
IRQ_A#
—
—
—
Onbd. USB 2.0 controller
IRQ_H#
—
—
—
Onbd. LAN controller (Intel 82547GI)
IRQ_F#
—
—
—
Onbd. RAID controller (Promise 20378)
IRQ_H#
—
—
—
Onbd. IDE controller
IRQ_C#
Onbd. SATA controller (6300ESB ICH)
IRQ_C#
—
—
—
Onbd. 1394 controller (TSB43AB22A)
IRQ_E#
—
—
—
Onbd. audio controller (AD1980)
IRQ_B#
—
—
—