Revive 11/34

[william degnan]

Ray Fantini knows the 11/34 very well
https://www.youtube.com/watch?v=pU8DOKVxDJ8

He helped me with UNIBUS diagnosis.
I am sure you have seen this:
http://bitsavers.org/pdf/dec/pdp11/1134/

I would definitely start with the power supply and work my way through the
voltage regulators, etc.  If you already did this, I apologize for missing
that you mentioned.

BIll

On Mon, Dec 11, 2017 at 8:15 AM, william degnan <billdegnan at gmail.com>
wrote:

>
> > >>
> > >> Any suggestions as to what to try first?  I may have the bus grant in
> backwards.  I have other boards I can try.
> > >>
>
> For an 11/34A can one test for DC LO / AC LO?  If so and you don't get the
> correct reading that's a show stopper right there.  Remove all but the
> essential cards, terminate the UNIBUS to the shortest poss. size and least
> RAM.  I no longer have an 11/34A but there are a lot of similarities to the
> 11/40.  Many cards interchangable.
>
> Bill
>