2 Chapter
2.5.3Interrupt assignments
Standard interrupt assignments
IRQ | Priority Standard function |
01 System Timer
12 Keyboard Controller
2– Redirect to IRQ#9
412 Communications Port (COM1)*
513 IRQ Holder for PCI Steering*
614 Floppy Disk Controller
7 | 15 | Reserved |
83 System CMOS/Real Time Clock
94 IRQ Holder for PCI Steering*
105 IRQ Holder for PCI Steering*
116 IRQ Holder for PCI Steering*
127 Reserved
138 Numeric Data Processor
149 Primary IDE Channel
*These IRQs are usually available for PCI devices.
IRQ assignments for this motherboard
IOH
| 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
PCIE16_1 | shared | – | – | – | – | – | – | – |
PCIE16_2 | – | – | – | – | – | – | shared | – |
PCIE16_3 | – | – | – | – | shared | – | – | – |
ICH
| A | B | C | D | E | F | G | H |
PCIE1_1 | shared |
| – | – | – | – | – | – |
LAN | – | – | shared | – | – | – | – | – |
PCI_1 | shared | – | – | – | – | – | – | – |
PCI_2 | – | shared | – | – | – | – | – | – |
USB controller 1 | – | – | – | – | – | – | – | shared |
USB controller 2 | – | – | – | shared | – | – | – | – |
USB controller 3 | – | – | shared | – | – | – | – | – |
USB controller 4 | shared | – | – | – | – | – | – | – |
USB controller 5 | – | – | – | – | – | shared | – | – |
USB controller 6 | – | – | – | shared | – | – | – | – |
USB 2.0 controller 1 | – | – | – | – | – | – | – | shared |
USB 2.0 controller 2 | – | – | shared | – | – | – | – | – |
SATA controller 1 | – | – | – | – | shared | – | – | – |
SATA controller 2 | – | – | – | – | shared | – | – | – |
Audio Azalia | – | – | – | – | – | – | shared | – |
Chapter 2: Hardware information |