IRQ Sharing

I just recently took a look in device manager and I found that all of my PCI devices including my AGP Graphics cards are all sharing the same IRQ: 7. Now I havent had any problems yet but, I think this could be the cause of my PCI USB Adapter not working. So how would it be possible for me to once installed, assign my PCI USB Adapter an IRQ of its own? Thanks in advance.



AMD Thunderbird 850 @ 910 (107x8.5/1.80V)
Alpha PAL6035MUC Socket-A Heatsink/Fan
Abit KT7-RAID KT-133
Dual IBM Deskstar 30gig 7200 UDMA100
configured as one 60 gig RAID-0 Striping Array
BayCool III HD Cooler
1 DIMM - Crucial 256MB PC-133 CAS2 SDRAM
Guillemot 3D Prophet II GeForce2 GTS 64
OCed @ 220MHz Core / 380 MHz Memory
2COOL-PC Card Cooler
Soundblaster Live! X-Gamer
Pioneer 16x DVD Slot-load
Generic floppy drive
Cambridge FPS 2000 Speakers
Addtronics 7896A Full-Tower w/ 300W PS
Keytronic Lifetime keyboard
Microsoft Intellimouse Explorer (Optical)
RatPadz Mousing Surface
iiYama 22inch Vision Master Pro510 0.26mm
Windows 2000 Professional SP1
Tweaked Cable modem with all CAT-6 Wiring
2 answers Last reply
More about sharing
  1. Nice system!
    I don't see how "all" your devices are sharing the same IRQ unless you have them all reserved in the BIOS or in Windows.
    Go to device manager
    highlight "Computer"
    click "Properties"
    click the "Reserve Resources" tab
    Are any IRQs listed? If not check the BIOS.
    In the BIOS it will be under Advanced-->PCI Configuration-->PCI/PNP IRQ Resource Exclusion.
    It may be different depending upon your BIOS version. Nothing should be reserved--set to [Auto] or [No/ICU].

  2. Hey thaReF -

    If you check you'll probably notice that you installed Win2000 with Plug & Play OS in your bios turned ON. Windows 2000 cannot dynamically assign system resources, and I'm pretty much certain that Win2000 does not contain an ACPI profile for your mainboard (it doesnt for my A7V either).

    Big problem is that most of the advice to fix this surrounds people who think a win98 fix (swapping cards around differant slots or trying a million differant drivers & bios versions etc. you know the drill) will work and it doesnt. Anyway its cake to fix:

    1) say NO to Plug n Play OS in the bios.
    2) when your 2000 desktop comes back up stick in your 2000 cd to reinstall and select the "upgrade" rather than "clean install" option; all your settings and software will be saved, no stress (but I always back up to be safe).
    3) when our now familer screen comes up asking for "scsi/ata driver" hit "F5".
    4) eventually you'll be given the option for several types of manual configurations, select "standard pc"
    5) have some coffee and let it finish.
    6) when its done have a look at your system resources and watch the pretty irq distribution.
    7) remember if all else fails read the 1400 page manual and hope the one you bought is more about installs than say networks:)

    BTW this is basically what both AMD and Windoze reccommends right now until SP2 comes out; there is rumor that Windoze may grant non-intel mainboards the right to exist in next version :wink:

    This will solve most problems but you may still encounter difficulty with Via AGP, hot fix and updated drivers or no. In my A7V situation I have a normal (2X) and optimal (4X) in bios I just run it at normal until SP2 comes out with full Via AGP support; I'm running rock solid and flying. hope this helps.

    later Jim

    :cool: <font color=blue>Micron DDR Cult Member</font color=blue>
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