Re: PDP-11/45 RSTS/E boot problem

[Paul Koning via cctalk]

> On Feb 4, 2019, at 12:18 PM, Bob Smith via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
> I keep wondering about the psu. I just recall the /45 in my lab was
> always a little flakey.
> We suspected everything in the machine, and it was ak to chasing a sea
> bat in the dark.

Good theory.

In RSTS development we once ran into DMC-11s not working reliably.  The field 
service tech knew exactly what to look for, and started checking all the supply 
voltages.  The spec says allowed tolerances are +/- 5%.  He knew the reality 
for correct operation was -0%, +5%, so he tweaked all the supplies to read a 
hair above nominal.

Is there any way to attach a logic analyzer to various data paths on this 
machine?

        paul