[comp.arch] Old

tjones%sunset.utah.edu@cs.utah.edu (Ray Jones) (05/29/90)

    Some friends and I recently acquired a DG Nova 3, with 10 Meg Disk Platters
and ~32k onboard ram.  Don't ask me why we did this.  Probably because we're 
stupid.  Anyway, the problem is, we can't get it started.
    Suposedly the previous owners spent about a year getting it going and 
finally got it to run a copy of Word Perfect they grabbed somewhere, but we
can't do a thing with it.  It is a front panel switch bootstrap loader, 
something we've all been lucky enough not to come in contact with until now.
    We'd like to get the beast (Actually we've named it BERTHA.) started, but
nothing we've tried has worked.

    (Please no RTFM responses.  We tried that.  Several times.  All the way
through.)

tjones@hell.utah.edu

-------------------------------------------------------------------------------
		      Email: tjones@hell.utah.edu
  Login Name: Thouis Jones                     In Real Life: tjones
   My opinions are my own, but then again, no one else wants them.

terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr) (05/30/90)

In article <1990May29.025253.15707@hellgate.utah.edu>, tjones%sunset.utah.edu@cs.utah.edu (Ray Jones) writes:
>     Some friends and I recently acquired a DG Nova 3, with 10 Meg Disk Platters
> and ~32k onboard ram.  Don't ask me why we did this.  Probably because we're 
> stupid.  Anyway, the problem is, we can't get it started.
>     We'd like to get the beast (Actually we've named it BERTHA.) started, but
> nothing we've tried has worked.

  Ok, you asked for it 8-}

  You've got front panel switches in groups of 3 (octal), right? Your 10Mb
disk should either be a 4234 disk (Diablo 44) drive, or a 6045 (I think
that's right, it's been years) DG-built disk. In any event, it's device
code 33. You need to set the front panel switches to 100033 (left switch
up, middle ones down, 5 right switches UUDUU) and lift Program Load. This
should start a boot sequence to your disk drive. If all is well, you'll
get asked for the date and time (at least you will if you're running RDOS
or a derivative). The prompt is "R;", believe it or not.

  If that doesn't get you going, look at the front panel lights. If you
don't have a RUN state, or the lights just blip and die when you do the
program load, you are probably missing some boards. Check for empty slots
in the backplane. As I recall, slot 0 (not really a slot) was the power
supply, 1 & 2 were the CPU, 3 was MAP, 4-something were memory, and the
rest are peripheral controllers. Empty slots before the last used one
must have 2 grant jumpers installed, but I don't recall exactly where...

  The useless things I remember...

	Terry Kennedy		Operations Manager, Academic Computing
	terry@spcvxa.bitnet	St. Peter's College, US
	terry@spcvxa.spc.edu	(201) 915-9381