If you look in the "PDP-11/84 System Technical
and Reference Manual"
Ooops, getting my 84's and 94's (it's the same chassis) mixed up. You of
course want the "PDP-11/94-E System User and Maintenance Guide"
Section 3.7 lists several ways to get into ODT. In
addition to those,
if you look at Section 3.2.2, it allows you to configure the machine to
fall into ODT on power-on (section B gives details).
Basically the same manual, but you want Section 188.8.131.52 in this one for the