PDP-11/45 RSTS/E boot problem

4 Feb 2019

...
    The obvious answer is bad memory.  
 At the board level, yes.  Deeper, it could be bad memory bits or bad
 memory decode.  
 Yes, one of the standard early PDP-11 memory tests is the "no duplicate address
test". 
I should say that the memory board is not _completely_ whack -- it is passing the rather
thorough MAINDEC ZQMC, a 0-124k exerciser with multiple pattern/sequence tests which also
kicks around the KT11.

That doesn't rule out the possibility that there is a lurker in there not covered by
the DEC diags.  But if there is, its something subtle...

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PDP-11/45 RSTS/E boot problem