Asus P4XP-X User Manual - Page 23

1.10 Expansion slots The motherboard has five PCI slots and one Accelerated Graphics Port (AGP) slot. To install and configure an expansion card: 1. Install an expansion card following the instructions that came with the chassis. 2. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for BIOS information. 3. Assign an IRQ to the card. Refer to the tables below. 4. Install the drivers and/or software applications for the expansion card according to the card documentation. 1.10.1 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 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. 1.10.2 IRQ assignments for this motherboard A PCI slot 1 - PCI slot 2 - PCI slot 3 - PCI slot 4 - PCI slot 5 - AGP slot used Onboard USB controller 1 - Onboard USB controller 2 - VIA VT6202 USB controller 1 - VIA VT6202 USB controller 2 - VIA VT6202 USB 2.0 controller - VIA VT6105L LAN (optional) - Onboard audio (optional) - BCD shared --- shared - - - shared - - - shared - shared - shared - - E - - - used F shared - - - shared GH -- 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 arise between the two PCI groups making the system unstable and the card inoperable. ASUS P4XP-X motherboard user guide 1-13