I am working on project which requires running devicenet interface scanner card on realtime operating system (Hyperkernel). I have been doing a little bit of shopping around and found that devicenet master source code is available at a cost. But it seems I will have to develop the card specific interface on my own. Since I do not have enough information on devicenet I cannot estimate what exactly do I have to do to write the card specific interface and how much effort it would involve. Any thoughts/ideas?