Asus A8N-SLI A8N-SLI English edition user's manual, version E1947 - Page 42

2.5.3 Interrupt assignments Standard interrupt assignments IRQ Priority 0 1 1 2 2 - 4 12 5 13 6 14 7 15 8 3 9 4 10 5 11 6 12 7 13 8 14 9 15 10 Standard Function System Timer Keyboard Controller Re-direct to IRQ#9 Communications Port (COM1)* IRQ holder for PCI steering* Floppy Disk Controller Printer Port (LPT1)* System CMOS/Real Time Clock IRQ holder for PCI steering* IRQ holder for PCI steering* IRQ holder for PCI steering* PS/2 Compatible Mouse Port* Numeric Data Processor Primary IDE Channel Secondary IDE Channel * These IRQs are usually available for ISA or PCI devices. IRQ assignments for this motherboard A B C D E F G H PCI slot 1 shared - - -- - - - PCI slot 2 - shared - - - - - - PCI slot 3 - - shared - - - - - Onboard USB 1.0 controller shared - - -- - - - Onboard USB 2.0 controller shared - - -- - - - Onboard LAN1 shared - - -- - - - Onboard 1394a 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. 2-16 Chapter 2: Hardware information