Since T uses the low bits for tags on the 68000 and the Vax we
are able to use the full available address space on each, 24 bits
in the case of the apollo and 31 bits in the case of the Vax.
Also note that the Tern has a 28 bit address space. And yes, GCing
such a large address space would presumably be a bitch, but our
experience at Multiflow is that it ain't no great joy on the 3600
either.
-- Nat