How do I change IRQ?

By theo.aku ยท 4 replies
Apr 24, 2006
  1. Hi I've just got myself a new sound card but it's fitted in on an IRQ channel with 2 other PCI devices and I think that this must be the reason that since installing it my PC is hanging on a black screen during start up for about 3 minutes, just after the windows splash screen.

    Could someone please let me know how to change the IRQ settings (if this is indeed what I need to do) through the BIOS as I can't do it in windows (something to do with ACPI I beleive).

    Thanks very much for your time.....

    Theo, London

    My settings look like this at the moment:

    0 : System timer
    1 : Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
    4 : COM1
    4 : Communications Port (COM1)
    6 : Standard floppy disk controller
    8 : System CMOS/real time clock
    9 : Microsoft ACPI-Compliant System
    10 : MPU-401 Compatible MIDI Device
    12 : Microsoft PS/2 Port Mouse (IntelliPoint)
    13 : Numeric data processor
    14 : Primary IDE Channel
    15 : Secondary IDE Channel
    16 : MEDION RADEON 9600 TX
    17 : CMI8738/C3DX PCI Audio Device <--- new sound card (a Trust SC-5250)
    17 : Creatix V.9X DSP Data Fax Modem
    17 : OHCI Compliant IEEE 1394 Host Controller
    19 : MEDION (7134) WDM Video Capture
    19 : SiS 900-Based PCI Fast Ethernet Adapter
    20 : SiS 7001 PCI to USB Open Host Controller
    21 : SiS 7001 PCI to USB Open Host Controller
    22 : SiS 7001 PCI to USB Open Host Controller
    23 : SiS PCI to USB Enhanced Host Controller


    Model : 1x Intel Pentium 4 CPU 2.60GHz
    Speed : 2.61GHz
    Performance Rating : PR2867 (estimated)
    Type : Standard
    L2 On-board Cache : 512kB ECC Synchronous ATC (8-way sectored, 64 byte line size)

    Bus(es) : ISA AGP PCI USB FireWire/1394 i2c/SMBus
    MP Support : 2 CPUs
    MP APIC : No
    System BIOS : Phoenix Technologies, LTD 6.00 PG
    System : MEDIONPC
    Total Memory : 1023MB DDR-SDRAM

    Chipset 1
    Model : Silicon Integrated Systems (SiS) SiS648 CPU to PCI Bridge
    Front Side Bus Speed : 4x 100MHz (400MHz data rate)
    Total Memory : 1024MB DDR-SDRAM
    Memory Bus Speed : 2x 166MHz (332MHz data rate)
  2. Mictlantecuhtli

    Mictlantecuhtli TS Evangelist Posts: 4,345   +11

    Usually, with the current Windows OSes, the easiest way to change the IRQ is to change the PCI slot.
  3. theo.aku

    theo.aku TS Rookie Topic Starter Posts: 25

    Thanks, but unfortunately the setup I've got won't allow it. The Trust card effectively uses two slots and so there is no scope for moving it around.

    There must be a way round this. I have empty IRQ slots sitting there so why isn't there a simple way of changing the IRQ. Perhaps someone knows a way of doing this in DOS?
  4. Peddant

    Peddant TS Rookie Posts: 1,446

    "Windows XP cannot rebalance resources in the same way that Microsoft Windows 98 does. After PCI resources are set, they generally cannot be changed. If you change to an incorrect IRQ setting or I/O range for the bus that a device is on, Windows XP cannot compensate by rebalancing the resource that was assigned to that bus."

    From - William Gates
  5. theo.aku

    theo.aku TS Rookie Topic Starter Posts: 25

    Crap. Anyone want to make me an offer on the card then!?
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