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@Muetze1:But where to get ports for example nforce motherboards?Basicly datasheets?But i think nforce info is gathered via PCI.
We discussed all before and all needed thinks are said...
But for you once again: mostly all chipsets implement a SMBus controller PCI device. The device PCI register contains the port address of the SMBus interface. The ports are mostly a little bit vendor specific.
Look for a PCI device with class id 0x0c and sub class id 0x05.