Hi ST, nice to talk to you.
Today I don't have time, I must go to work now, but as soon as I can I will try to make the pin to pin test.
If they are directly connected it's true that maybe a software switch make the selection of which bios take the control at start up, I am not a low level man (a bit a bit), but without specifications and as you say with the patents on hand will be hard to find how it is done. Maybe dis assembling the code, but as I say, my low level knowledge is very low :D.
As soon as I can i will put my hands on the multimeter or the oscilloscope and do something (the bricking is not on my plans, yet :D).
On 3/27/07, ST firstname.lastname@example.org wrote:
Has anyone found anything about the "second" plcc socket?
I was planning to investigate this. But currently i am a little short on free time. So if you are patient or if you have some multimeter you can check if the pins from bios chip are connected to the equivalent free contacts.
I have taken already an look at the dualbios stuff from gigabyte. It seems as both bios chips should contain the same bios (at least partly) and some software logic determines which chip it activates for booting. Well it's patented so there "should" be some information available but so far i haven't found the corresponding patent filings (are they public or only available with the ever involved "bling" when it comes these patents ?).
Then there has to be some logic which decides to boot from which chip. But if s.o. can dig up the filings we probably know more?
Then it would be nice if someone from the list could point out which flash chips might be compatible with the free contacts. Also there has been some remarks on this list that the inner contacts may be some kind of rom contacts and the outer are flash contacts.
So before bricking your mainboard just try to dig up the above information? And probably we will find a way to enable an dual boot between the original bios and the linuxbios, which would be quite neat.
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