LVDS and Cyclone II Nios DEV Kit

I understand, that only need tri-state LVDS drivers, but not bidirectional ones. So the point is to use pseudo-differential drivers. This simply means, you have two pins, one is driven by the positive and one by the negative (inverted) signal, both use a common tri-state signal. The solution won't work at high LVDS speeds and series resistors should be provided, if a correct LVDS differential voltage level is intended.