In his description of the xl3600, peter paine writes: The FPA option is a 125 Transputer hypercube coprocessor which can also be used to run concurrent Lisp through shared memory. I'm baffled ;-) Why does a machine of this class have an FPA option. I would think it should be standard equipment. ^^^^^^ I'm even more baffled by how you configure 125 nodes as a hypercube. drstrip@cs.sandia.gov