[coreboot] gigabyte dual bios programming

[bari]

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 <wangqingpei at gmail.com 
> <mailto:wangqingpei at gmail.com>> 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 <peter at stuge.se
>     <mailto:peter at stuge.se>> 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/coreboot@coreboot.org/msg23613.html
>         http://www.mail-archive.com/linuxbios@linuxbios.org/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
> 
>         --
>         coreboot mailing list: coreboot at coreboot.org
>         <mailto:coreboot at coreboot.org>
>         http://www.coreboot.org/mailman/listinfo/coreboot
> 
> 
> 
> 
>     -- 
>     Wang Qing Pei
>     MSN:wangqingpei at hotmail.com <mailto:MSN%3Awangqingpei at hotmail.com>
>     Gmail:wangqingpei at gmail.com <mailto:Gmail%3Awangqingpei at gmail.com>
>     Phone:86+13426369984
> 
> 
> 
> 
> -- 
> Wang Qing Pei
> MSN:wangqingpei at hotmail.com <mailto:MSN%3Awangqingpei at hotmail.com>
> Gmail:wangqingpei at gmail.com <mailto:Gmail%3Awangqingpei at gmail.com>
> Phone:86+13426369984
>