Asus P5SD2-VM User Manual - Page 32

1.8.3 Interrupt assignments Standard interrupt assignments IRQ Priority Standard Function 0 1 System Timer 1 2 Keyboard Controller 2 - 3 11 IRQ holder for PCI steering 4 12 Communications Port (COM1) 5 13 Standard IRQ holder for PCI steering 6 14 Floppy Disk Controller 7 15 Printer Port (LPT1) 8 3 System CMOS/Real Time Clock 9 4 Microsoft ACPI-Compliant 10 5 IRQ holder for PCI steering* 11 6 IRQ holder for PCI steering* 12 7 PS/2 Compatible Mouse Port 13 8 Numeric Data Processor 14 9 Primary IDE Channe * These IRQs are usually available for PCI devices. IRQ assignments for this motherboard A B C D E F GH PCI1 shared shared shared shared - - - - PCI2 shared shared shared shared - - - - PCIEX16_1 shared - - - -- -- PCIEX1_1 shared - - - -- -- Onboard USB controller 1 - - - - shared - -- Onboard USB controller 2 - - - - - shared - - Onboard USB 2.0 controller - - - - - - shared - Onboard HD audio - - shared - -- -- Onboard LAN - - - shared - - -- Onboard IDE port shared - - - -- -- Onboard SATA port - shared - - -- -- 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. 1-20 Chapter 1: Product introduction