Kent after Joseph:

> On the back of your Jamaica box are 8 four bin octal settings
> the identify = each device to the CPU.  If the number are not set
> right you will have a = conflict.
>
> So, Get a Flashlight(it's dark back there), a magnifying glass(the =
> switches are small) and a little straitened paper clip to set them.

While doing above, also recommended flipping those tiny little DIP
switches back and forth a couple times;  and as best you can try and
sense if any of them are noticeably "weaker" than the others.  When
I configured our two Jamaica boxes a few years ago, I found one
switch that had essentially no "tension" left:  The switch would just
*barely* stay in the "up" position if left totally undisturbed.  "Tap" the
switch just slightly and it would fall to the "down" position.....  Which
would obviously lead to unhappy results if it happened while up and
running...

SIDEBAR (and NOT officially supported) solution to above problem;
assuming you very rarely if ever expect to have to change setting on
any "weak" DIP switches:   Make sure the switch is as firmly in the
"up" position as possible....  Then take one big drop of RTV silicone
and cover the switch.  Verify switch did not move during application
of silicone...   Once RTV has hardened, you can be guaranteed that
it will never "fall down" on its own again..  Of course if you ever *do*
need to change the setting on that switch again, you will have to
scrape / cut away the RTV.....   We never had a problem after I did
the above, but the usual YMMV disclaimers apply.....

Ken Sletten

* To join/leave the list, search archives, change list settings, *
* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *