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PDP 11/40 - Looking for M7856 and M9312 Docs

I am doing some work on a PDP 11/40  - Looking for M7856 and M9312
Docs.

I have a PC set up to act as a terminal, and I *believe* the M7856 is
set for 19200, and I *believe* the ROM in position 1 of the M9312 is
the bootstrap program.  I need more details, the PDP 11/40 manual is
not super informative about peripheral cards. I am able to write and
recall memory in the 64K range.

Any tests I can toggle in?

I have a LA36 terminal modded to 1200 baud, but I thought I would use
a terminal program on a laptop emulating a VT52 first, to eliminate
one variable.

I am trying to determine where in ROM the bootstrap is, it's not in
165144, like I expected.  I have only FFFF's and 0000's.  Where should
I look?

Bill