One note for those who've been away from 4.x for a while...
If you're using a console window for editing and you just wonder why the
full screen of the VT100 doesn't show up -- it's because the getty is
set down at 1200 baud for the good old LA120 DECwriter III.
Set /etc/ttys to 18console or 12console and it's expects 9600baud and
then vi will let you use full screen to edit.
Been a while since I ran a fake Vax under Unix.
Bill