C++ model of pcie/usb

Question

Is it possible to obtain a software model of the industry standard interfaces such as PCI Express or USB? Is it available in the open source?

Answer

Yes, the complete specifications are available. Otherwise they wouldn't be standards, would they?

See: http://en.wikipedia.org/wiki/PCI_Express http://www.pcisig.com/specifications/pciexpress/

And: http://en.wikipedia.org/wiki/Universal_Serial_Bus http://www.nalanda.nitc.ac.in/industry/datasheets/philipsIC22/CONTENTS/USBSTAND.PDF