11
IRQ Priority
Standard
function
0 N/A
System
Timer
1 N/A
Keyboard
Controller
2 N/A
Programmable
Interrupt
3 *
8
Communications Port (COM2)
4 *
9
Communications Port (COM1)
5 *
6
Sound Card (sometimes LPT2)
6 *
11
Floppy Disk Controller
7 *
7
Printer Port (LPT1)
8
N/A
System CMOS/Real Time Clock
9 *
10
ACPI Mode when enabled
10 *
3
IRQ Holder for PCI Steering
11 *
2
IRQ Holder for PCI Steering
12 *
4
PS/2 Compatible Mouse Port
13
N/A
Numeric Data Processor
14 *
5
Primary IDE Channel
15 *
1
Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
2-5-3 Interrupt Request Table For This Motherboard
Interrupt request are shared as shown the table below:
INT A INT B
INT C
INT D
INT E
INT F
INT G INT H
Slot 1
√
Slot 2
√
Slot 3
√
Slot 4
√
Slot 5
√
Onboard LAN
√
Onboard USB 1
√
Onboard USB 2
√
Onboard USB 3
√
Sound
√
IMPORTANT!
If using PCI cards on shared slots, make sure that the drivers support “Shared
IRQ” or that the cards don’t need IRQ assignments. Conflicts will arise between
the two PCI groups that will make the system unstable or cards inoperable.
2-5-4 AGP Slot
This motherboard provides an AGP Slot, only support the 1.5V 4X/0.8V 8X AGP VGA card.
Do not use AGP 2X card (3.3V) in this motherboard. It will burn and damage the motherboard due to
chipset can not support AGP 2X (3.3V).
IMPORTANT!
Before you plug-in AGP card, please make sure the following notice is fully
understood and practiced. If your AGP card has “AGP 4X notch (show
below) please make sure your AGP card is AGP 4X/8X (1.5V/0.8V) not AGP
2X (3.3V)
