A slide deck overview of the PilGRIM processor design (references to which are otherwise sadly behind Springer Link paywalls: <a href="http://link.springer.com/chapter/10.1007%2F978-3-642-24276-2_4" rel="nofollow">http://link.springer.com/chapter/10.1007%2F978-3-642-24276-2...</a>)