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  • #1

    KA7 AGP support

    Forgive me if this is known issues, I have been trying to keep up with the settings for this mobo. PCIList reports the following:

    AGP transfers
    --------------------------------------------------------
    The AGP aperture is currently set to 256MB.

    The system board does NOT support AGP transfers. The graphics card supports up to 4X AGP transfers.

    AGP 2X transfers are currently enabled.


    --------------------------------------------------------
    Sideband addressing
    --------------------------------------------------------
    The system board does NOT support sideband addressing. The graphics card supports sideband addressing.

    Sideband addressing is currently enabled.

    This is on an Abit KA7 with the Beta BIOS KA7_42. All settings in BIOS are enabled, with the aperture set to 64MB. All video and BIOS shadowing is disabled. Performance is good in 3DMark and Quake2, everything is stable. I'm just wondering about the system board not supporting AGP transfers or sidebanding. Could PCIList be reporting incorrect info (ver 2.00)? Also, the card is 4X capable, I have 4X enabled in BIOS, but it gives a corrupt screen on boot if I force it (Via GART 4.02, driver 5.52). I'm aware the performance gain is none / negligible, but I would like to be able to enable it (no telling how long the folks will have this system, it could be important at some point). Any ideas?

    edit: Forgot to include the (very important) fact that it is a G400 32MB vanilla card. In case anybody was wondering...


    ------------------
    "I wrestled with reality for 27 years and I'm happy to say I finally won out over it."

    [This message has been edited by anid (edited 18 May 2000).]
    "I wrestled with reality for 27 years and I'm happy to say I finally won out over it."
    Tags: None
  • #2
    ok, abit ka7, 128 mo pc133,win98se, athlon 600, g400, 5.52 drivers and 4.00 via agp drivers

    Pcilist says the same thing that for you but i get agp*4
    Wcpuid says agp*4 too
    ps: the key AgpFallback must be set to "1"
    HKLM/system/currentcontrolset/services/class/display/0000/settings/cpu


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    • #3
      How about the same for Win2K?
      "Be who you are and say what you feel, because those who mind don't matter, and those who matter don't mind." -- Dr. Seuss

      "Always do good. It will gratify some and astonish the rest." ~Mark Twain

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      • #4
        The system board does NOT support AGP transfers.
        AGP 2X transfers are currently enabled.
        If it doesn´t support it, how can the 2X transfers be enabled?

        [This message has been edited by Nuno (edited 18 May 2000).]

        Comment

        • #5
          FWIW, I have the KA7 and WCPUID reports it does support 4x and it is enabled (this is after machine.inf and new viaagp.sys fixes). PowerStrip also indicates AGP is enabled at 4x.

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          • #6
            This is a shortcoming of PCIList. I believe it doesn't know how to properly detect the hardware of the VIA chipset related to these functions. So while it's a cool little utility, and it can be used to verify what WinCPUID reports, for some of us it's usefulness is limited.
            <a href="http://www.gaijindesign.com/lawriemalen/jedi" target="_blank"><img src="http://www.gaijindesign.com/lawriemalen/jedi/yoda.jpg" width="285" height="123" border="0"><br>:: how jedi are you? ::</a>

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            • #7
              If it doesn´t support it, how can the 2X transfers be enabled?
              I guess this needs to be changed: the current version is only reporting the state of the AGP master. Its an odd case: if the target can't be enabled, the master shouldn't be enabled either... (Note that enabled and working aren't the same thing.)

              I believe it doesn't know how to properly detect the hardware of the VIA chipset related to these functions.
              Actually, the *only* chipset-specific call in PCIlist is the query for AGP aperture size, and since VIA has not released any register-level documentation for either of their last 2 chipsets, this will be wrong.

              Everything else, however, is chipset-independent.

              Comment

              • #8
                'Swhat I was kinda thinking (PCIList not properly supporting the KX133), but I wanted to be on the safe side, was worried that I was missing something in the BIOS. Didn't wanna use Sandra to verify cuz it is often inaccurate with Via boards as well, forgot that Wcpuid would check it. And I do have the registers for the 133A, which for AGP should be identical to the KX133, just didn't wanna have to go digging through it - the registers hold the AGP settings in at least 3 different places, making it a pain to see which one is superceding which. Thanks everyone.



                ------------------
                "I wrestled with reality for 27 years and I'm happy to say I finally won out over it."
                "I wrestled with reality for 27 years and I'm happy to say I finally won out over it."

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