Asus M2S-X M2S-X user's manual - Page 29

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 IRQ holder for PCI steering 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 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 Channel 15* 10 Secondary IDE Channel * These IRQs are usually available for PCI devices. 1.8.2 IRQ assignments for this motherboard PCI slot 1 PCI slot 2 PCI slot 3 PCIe x1 slot 1 PCIe x1 slot 2 PCIe x16 slot Onboard USB controller 1 Onboard USB controller 2 Onboard USB controller 3 Onboard USB 2.0 controller Onboard LAN Onboard Audio Serial ATA A B C DE F G H shared - - - - ­ - - ­ - - shared - - - ­ - - ­ - - - shared - - ­ - - ­ - shared - - shared - - shared - - - - - - used ­ - ­ - - - - - - - ­ used - ­ - - - - - - ­ - ­ used - - - - used - - - used - - - - - - shared - 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. ASUS M2S-X 1-17