The Gigabyte 785GMT-UD2H has a fully functional dual SPI flash bios circuit. Peter's circuit is for boards that leave out one SPI flash device and you if wish to use a toggle switch to choose between the SPI flash device you wish to boot from.

The Gigabyte 785GMT-UD2H has everything already soldered in place. You just need to use the patch for ITE it8720/18 dual bios that Vadim Girlin wrote, or something very similar. It worked for him on his Gigabyte GA-MA770-UD3 AMD 770 (RX780 / SB700) with ITE IT8718/20.

-Bari

Qing Pei Wang wrote:
i saw teh method from http://stuge.se/m57sli/ .
i have some questions:

1. U9: Populate flash chip.
2. R509: Remove. (I can not find the from your pic 
m57sli_soic_detail_labels.jpg )

3. R89,R130: Populate 0402 100k resistors.
how can i know which register i should move for my own board?
On Wed, Jul 7, 2010 at 8:05 AM, Qing Pei Wang <[email protected] <mailto:[email protected]>> wrote:

    hi peter,
    there used to have too bios chips, but i remove the B_BIOS, just
    leave the M_BIOS which means the main bios .
    I am pretty interested with your method. Is that useful for the
other Gigabyte mainboards like my 785GMT-UD2H

    On Wed, Jul 7, 2010 at 1:30 AM, Peter Stuge <[email protected]
    <mailto:[email protected]>> wrote:

        Hi,

        Qing Pei Wang wrote:
         > i faced a problem about Gigabyte dual bios mainboard. my SF100
         > programmer can not detect the spi chip unless i removed it from
         > the mainboard,
        ..
         > Is there any idea about this? it's pretty strange about these
        dual
         > bios things.
         > Any suggestion will be welcome for me.

        Please see
        http://www.mail-archive.com/[email protected]/msg23613.html
        http://www.mail-archive.com/[email protected]/msg05929.html

        And there's info about this as implemented on the GA-M57SLI-S4 board
        on http://stuge.se/m57sli/

        Do you have two flash chips populated, or only a single one?


        //Peter

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-- Wang Qing Pei
    MSN:[email protected] <mailto:msn%[email protected]>
    Gmail:[email protected] <mailto:gmail%[email protected]>
    Phone:86+13426369984




--
Wang Qing Pei
MSN:[email protected] <mailto:msn%[email protected]>
Gmail:[email protected] <mailto:gmail%[email protected]>
Phone:86+13426369984


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