HP Vectra XE310 hp vectra xe310 series 2, technical reference manual - Page 31

BIOS Overview Channel 0 1 2 3 4 5 6 7 DMA controller Function Free Free if not used for parallel port in Setup Floppy disk controller Free if not used for parallel port in Setup Used to cascade DMA channels 0-3 Free Free Free Interrupt Controllers The Interrupt Requests (IRQ) are numbered sequentially, starting with the master controller, and followed by the slave. Windows 98 SE Windows 2000 and Windows XP IRQ (Interrupt Vector) Interrupt Request Description IRQ (Interrupt Vector) Interrupt Request Description INTR INTR IRQ0 System Timer ISA0 System Timer IRQ1 Keyboard Controller ISA1 Standard 101/102-Key or Microsoft Natural PS/2 keyboard IRQ4 Used by serial port if enabled ISA4 Communication Port (COM1) IRQ5 Free if not used for parallel port or audio ISA6 Standard Floppy Disk Controller IRQ6 Floppy Disk Controller ISA8 System CMOS/real time clock IRQ7 LPT1 ISA9 Microsoft ACPI-Compliant System IRQ8 RTC ISA12 PS/2 Compatible Mouse IRQ9 Available for PCI devices, if not used by USB ISA13 Numeric data processor port IRQ10 Available for PCI devices, if not used by USB ISA14 Primary IDE Channel port IRQ11 Available for PCI devices, if not used by USB ISA15 Secondary IDE Channel port IRQ12 Mouse PCI5 Intel(R) 82801BA/BAM SMBus Controller - 2443 IRQ13 Co-processor PCI17 Intel(R) 82801BA/BAM AC'97 Audio Controller - 2445 IRQ14 IDE Primary channel PCI19 Intel(R) 82801BA/BAM USB Universal Host Controller - 2442 IRQ15 IDE Secondary channel. Free unless disabled PCI20 Intel(R) PRO/100 VE Network Connection PCI 23 Intel(R) 82801BA/BAM USB Universal Host Controller - 2444 product description 31