These OS projects are concentrating on 64 bit address spaces on 64 bit CPUs but should provide insights for LispOS nevertheless. Mungi project papers: <http://www.cse.unsw.edu.au/~disy/papers.html> Opal project papers: <http://www.cs.washington.edu/homes/levy/opal/opalpapers.html> Sombrero project (and various SASOS links): <http://www.eas.asu.edu/~sasos/>