Asus p4r800vm P4R800-VM User Manual - Page 23

1.8.1 Standard interrupt assignments IRQ Priority Standard Function 0 1 System Timer 1 2 Keyboard Controller 2 N/A Programmable Interrupt 3* 11 Communications Port (COM2) 4* 12 Communications Port (COM1) 5* 13 IRQ holder for PCI steering 6 14 Floppy Disk Controller 7* 15 Printer Port (LPT1) 8 3 System CMOS/Real Time Clock 9* 4 IRQ holder for PCI steering 10* 5 Advance AC'97 CODEC 11* 6 Standard PCI Graphics Adapter (VGA) 12* 7 PS/2 Compatible Mouse Port 13 8 Numeric Data Processor 14* 9 Primary IDE Channel 15* 10 Secondary IDE Channel * These IRQs are usually available for ISA or PCI devices. 1.8.2 IRQ assignments for this motherboard PCI slot 1 PCI slot 2 PCI slot 3 AGP slot Onboard USB controller 1 Onboard USB controller 2 Onboard USB controller 3 Onboard USB 2.0 controller Onboard LAN Onboard audio A B C D - - shared - - - - shared shared - - - shared - - - - - - shared - - - shared - - - shared - - - shared - - shared - - used - - When using PCI cards on shared slots, ensure that the drivers support "Share IRQ" or that the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable. ASUS P4R800-VM motherboard user guide 1-13