on 10/09/2009 21:36 Andriy Gapon said the following:
The reason I am asking - this mainboard has Gigabyte DualBIOS feature ("non-virtual"), and there are two physical SPI flash chips on the board. I am curious as to how they are wired. Are they wired to different controllers? Or the same one - then which one? Can I access both of them? Does anybody know about that or has a reasonable guess?
Not sure if I am correct or if it matters to anybody besides me, but it seems that in my case both SPI flash chips are connected to IT8718 SuperIO. And I think that the chips are selected via bit 0 of register 0xEF of device with LDN 7 (i.e. GPIO). That register and bit do not appear to be documented in the publicly available specifications that I could find via google.
Maybe somebody would find this information useful.