In message <87pu2hqv3r.fsf@snark.piermont.com>"Perry E. Metzger" writes

>Er, Eduardo, the machines in question invented the modern MMU. They
>were the first architecture to have demand paged virtual memory.

Nope, the first demand-paged virtual memory was at Manchester, with
CRT memory.  See the the paper on two-level store by Kilburn &c,
collected in Bell, Siewiorek and Newman's "Computer Architecture".