[rescue] Unhappy MicroVAX II

Ian Finder ian.finder at gmail.com
Tue Apr 16 14:00:18 CDT 2013

Nope, no hex display at all. Totally dark, even with all the other optional
cards removed. All ends of the cables were reseated and checked a lot.
There's still lights on the card edge; the green DC-OK led, and some red

But the hex display (and serial console) is totally a no show.

At MC6810's suggestion I'll check the voltages& scope the PSU when I get
home, but the LEDs on the front turn on and DC-GOOD is among them.

On Tue, Apr 16, 2013 at 10:25 AM, Mouse <mouse at rodents-montreal.org> wrote:

> > [...]  Still nothin' on the hex display. :(
> Nothing at all?  As in, it's not even lit up?  That's definitely not
> right; no matter what the data lines are driven as you should get
> something displayed.  My first suspect there would be unplugged or
> mis-plugged cables or some such.  (Don't forget to check the cab kit
> end of the cable too, not just the CPU end.)
> I don't know the details, but it strikes me as at least possible that a
> mis-plugged or loose cable could have the CPU thinking it's not CPU 0
> and it's thus holding itself in reset waiting for some other CPU to
> tell it to boot.
> Or if you mean it's just stuck showing F, that has a lot more possible
> failure modes - it's set to F at power-up and the second instruction
> executed from the ROMs sets it to E.
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   Ian Finder
   (206) 395-MIPS
   ian.finder at gmail.com

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