O. Sharp wrote....
  Boy, I wish I knew PDP-11 assembler better. Someday.
:) 
Yes, I do wish I knew it better. Then I may have caught the problem myself
;)
 > I'm certain I'm typing in the memory
address test correctly. 
And just to be precise, I was typing the program correctly.
The website I
copied it from has it posted incorrectly. I'll email the person who runs the
website to make a correction.
  Er, is "br loop2" numerically correct here?
It, er, smells wrong.  :) 
I wouldn't have likely caught that. Patrick was right
- thanks! It does in
fact pass the test.
Now that I've got enough confidence in the machine being somewhat
functional, I'm gonna grab an RL02 and see if I can boot :)
Thanks for all the input folks!
Jay