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Thread: Trouble with BIOS IC - Unusual Flash Chip

  1. #1
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    Default Trouble with BIOS IC - Unusual Flash Chip

    I don't know if this is appropriate for this subforum, but I'm trying to build an MS-DOS/Win98SE gaming rig.

    Last year, I bought a motherboard (A Gigabyte GA-868LX), hoping to make the best gaming rig as much as possible.

    What I have started to do is attempt to upgrade each motherboard's BIOS I come across, to allow newer Pentium III Slot-1 CPUs to be used in them. I was able to get the previous motherboard that I had used working with the CPU, but it had trouble using any video card that I put into the AGP slot.

    Now I have a problem with this GA-868LX's BIOS chip. It is an Intel P28F002BC Flash Memory chip. My IC Programmer's list of settings does not have this particular model's pin arrangement, at least not one that's obvious. I understand that different models from different companies can have compatible pin arrangements and programming settings, which is how I upgraded the previous motherboard's BIOS. (The chip from that one is a Macronix-type 28F2000PPC-12C4, again a Flash Memory chip.)


    I bought a Willem I28F002BC adapter (seemingly allowing me to read it as a Macronix chip), but it still does not read. I even turned off the "Check Chip ID setting" (i.e. even if the chip ID is incorrect, but the pin arrangement and programming settings are compatible, then it will still read/write).

    Yes, I did put the Intel Flash chip back on the motherboard to make sure the computer turned on, just in case I thought I fried it.

    Can someone help me find a way to preserve this BIOS and upload an upgraded BIOS binary to the chip?

  2. #2
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    Well, there is a specific adapter for a Willem that appears to be peculiar to the Intel chip, if that is any help.

  3. #3
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    Quote Originally Posted by Chuck(G) View Post
    Well, there is a specific adapter for a Willem that appears to be peculiar to the Intel chip, if that is any help.
    That's the adapter that I bought. My IC programmer (TL866CS) does have settings for the Macronix chip, but it still does not read.

  4. #4
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    Oh, I thought you had the Willem programmer.

  5. #5
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    Can't you upgrade the BIOS with the official DOS AWDFLASH utility and ROM image that Gigabyte still provides on their website?

    I'm assuming you mean GA-686LX, not GA-868LX.
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  6. #6

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    Hi, did you pick the right chip ? The long one might be the keyboard controller, despite a BIOS sticker.

    Edit: Never mind. Just checked the chip database of my Genius G540.
    It seems to have support for a similar chip. The programmer is around 50€ or so (G840 ~80€).
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    Last edited by Jo22; May 2nd, 2019 at 06:16 AM.
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