Service Manual Chapter4. Control Electronics
© 2016
Nautilus Hyosung Inc.
All Rights Reserved.
4-13
- Standard Interrupt Assignments
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.
- 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 o
n 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.
