HOSTLEGACYaccess methodDataPortWrite=FCH::PM::RTCEXTINDEXdata port writeDataPortWrite=FCH::IOAPIC::IO_REGISTER_SELECT_REGISTER[indirect_address_offset]data port write
DataPortWrite=FCH::IO::PCI_INTR_INDEX(viaLEGACYIOaccess method)DataPortWrite=UMC::CTRL::ApbCmd[Address](viaSMNaccess method)