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Device Resources

Discussion in 'Windows Vista / 7 / 8 Client Exams' started by Sneakydave, Oct 10, 2005.

  1. Sneakydave

    Sneakydave Bit Poster

    I am slightly confused. My Lab PC (the one I am using now) has 2 devices set to use IRQ 16, my Soundblaster Audigy soundcard and my Radeon 9600 Graphics Card are both set to use IRQ 16 according to the device manager. Are devices supposed to be able to share IRQ addresses as I don't have any problems with the display or the sound.

    Device manager also lists the Radeon 9600 as a PCI device which I know is incorrect as it is an AGP8 card.

    Comments please :)
    WIP: MCSA 70-270
  2. tripwire45
    Honorary Member

    tripwire45 Zettabyte Poster

    As I understand it, devices can share IRQs under certain circumstances. Here's Microsoft's article on it: Link
    Certifications: A+ and Network+
  3. Dream_In_Infrared

    Dream_In_Infrared Nibble Poster

    From what little I know, the two devices sharing the same IRQ is a feature of the PCI self-configuring mechanism known as 'shareable interrupt' channels. It leads to a setup that is far removed from the traditional one device per IRQ setup of old and leaves some of your settings in Device Manager looking decidely odd.

    As for the graphics card showing up as a PCI device, it does on mine too and I have the same card as you. I think this is because the AGP slot is a more advanced version of a PCI slot and is known as such in Device Manager. My card graphics card is in the AGP slot but this is listed as PCI bus 1 in my Device Manager. :shrugs: Sorry for not being able to be more specific.

    I hope this is right. Someone correct me if I am not. :oops:
    Certifications: None :(
    WIP: A+
  4. Sneakydave

    Sneakydave Bit Poster

    Thanks for the info chaps all is now clear :)
    WIP: MCSA 70-270
  5. Pete01

    Pete01 Kilobyte Poster

    I think it's because your AGP card wants to really be a PCI express and is just confused about it's 'interfaceality' :biggrin

    I know my AGP card is..
    Certifications: MCP (NT4) CCNA
    WIP: 70-669, Learning MSI packaging
  6. ffreeloader

    ffreeloader Terabyte Poster

    Just as a sidelight.... Linux shows agp cards as PCI cards too. Running "lspci" on a Linux machine will always show agp cards.
    Certifications: MCSE, MCDBA, CCNA, A+
    WIP: LPIC 1

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