  The Durham adaptive optics real-time controller is a generic, high
performance real-time control system for astronomical adaptive optics systems.
It has recently had new features added as well as performance improvements, and
here we give details of these, as well as ways in which optimisations can be
made for specific adaptive optics systems and hardware implementations. We also
present new measurements that show how this real-time control system could be
used with any existing adaptive optics system, and also show that when used
with modern hardware, it has high enough performance to be used with most
Extremely Large Telescope adaptive optics systems.
