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Standard Interrupt Assignments
IRQ
Priority
0
1
2
3 *
4 *
5 *
6 *
7 *
8
9 *
10 *
11 *
12 *
13
14 *
15 *
* 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:
Slot 1
Slot 2
Slot 3
Onboard USB 3
HD Audio/MC97
IMPORTANT!
2-5-4 PCI Express 2.0 Slot
AMD 780G Series motherboard series offer one PCI-Express2.0 x16@ 16 lane graphics slots
and one PCI-Express2.0 x16 by 4lane. PCI-Express2.0 x16by 16 slots deliver up to
8Gbyte/sec data transfer rate at each relative direction and up 16 Gbyte/sec concurrently
while PCI-Express2.0 x16by 4 slots deliver up to 2 Gbyte/sec data transfer rate at each
relative direction and up 4 Gbyte/sec concurrently Fully compliant to the PCI Express Base
Specification revision 2.0, support PCI Express VGA card, and other PCI Express device.
One PCI Express2.0 x1 I/O slot offers 1 Gbyte/sec concurrently, over 7 times more
bandwidth than PCI at 133Mbye/sec, tackling the most demanding multimedia tasks
nowadays. The AMD 780G motherboards also carry two 32-bit PCI slots guarantee the rich
connectivity for the I/O peripheral devices.
N/A
System Timer
N/A
Keyboard Controller
N/A
Programmable Interrupt
8
Communications Port (COM2)
9
Communications Port (COM1)
6
Sound Card (sometimes LPT2)
11
Floppy Disk Controller
7
Printer Port (LPT1)
N/A
System CMOS/Real Time Clock
10
ACPI Mode when enabled
3
IRQ Holder for PCI Steering
2
IRQ Holder for PCI Steering
4
PS/2 Compatible Mouse Port
N/A
Numeric Data Processor
5
Primary IDE Channel
1
Secondary IDE Channel
INT A
INT B
√
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.
Standard function
INT C
INT D
INT E
√
√
√
√
11
INT F
INT G
INT H
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