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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.
NOTE!
2-5-3 Expansion Slots
AMD 870 Series motherboard series offer two PCI-Express 2.0x16@ 8 lanes graphics
slots. When PE4 installed switch card, the PE1 will doubled its bandwidth. Two PCI
Express x1 I/O slot tackling the most demanding multimedia tasks nowadays. The
AMD 870 motherboards also carry two 32-bit PCI slots and one mini-PCIE WIFIF card
expansion slot to 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
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
PCI-E2.0 x1 Slot
32-bit PCI Slot
11
MINI-PCIE slot
PCI-E 2.0 x16 Slot by 8-lane
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