>> However, this console starts doing things at the same time that the
>> video would.

Perhaps on a 4/260; on a 3/50, the PROM selftests, MMU tests and page
map tests get dumped to serial, as does the overall memory test, but
they don't go to video. (This can be distressing on a 12M sun3, as the
memory test for 12M takes a *long* time...)