I have an old copy of Sun's "Field Engineers Handbook". In it there is a few pages
on the 4/110's jumper settings. J900 pins 1-2 looks interesting. The description
says "IN=Shorts 3V battery". I have not tried this nor does it explane what this does.
But it sounds to me like a reset action. I cant imagine why someone would want
that jumper shorted perminantly.

I can scan in the pages for the 4/110 if you like. Since you have the hardware,
you might want Sun's explination of the settings.


Joe
> 
> At 05:09 PM 11/5/98 +0100, Edwin Mons wrote:
> >At 08:04 AM 05/11/1998 -0800, Rick Copeland wrote:
> >>At 08:45 AM 11/5/98 +0100, Edwin Mons wrote:
> >>>At 01:55 PM 04/11/1998 -0800, you wrote:
> >>>>At 04:02 PM 11/4/98 -0500, Michael C. Ibarra wrote:
> >>>>>Hi:
> >>>>>
> >>>>>	Try looking at http://www.squirrel.com/sun-nvram-hostid.faq.html in fact
> >>>>this
> >>>>>site has an excellent FAQ for other hardware questions as well.
> >>>>
> >>>>Been there done that! The FAQ clearly states that it does not include data
> >>>>or procedures for the 4/xxx series!
> >>>
> >>>I have the complete set of manuals that came with the Sun386i.  If my
> memory
> >>>serves me right, manual 2 contains a description of all NVRAM's at that
> >time,
> >>>including the Sun3, Sun4 and Sun386i.  I can look it up for you if you want
> >>>to.
> >>
> >>You can certainly check it out, but I have several 3/80's, two Sparc 2's,
> >>one 3/150, one 3/160, one Sparc Station 330, so I am familiar with what a
> >>nvram looks like and I am telling you that the 4/110 DOES NOT HAVE A NVRAM
> >>ON IT
> >No need to shout...
> >
> >>(at least not like the 3/80, Sparc 2, etc.).  There is a 2816
> >>soldered to the board and a clock chip soldered as well but no NVRAM chip.
> >Well, isn't the NVRAM just a clock + battery + RAM on a chip?  At least,
> in my
> >4/60 it is.  Anyway, if my memory serves me right (I do have a Sun 4/110 at
> >home, but didn't open in for ages) the 2816 and the clock are fed by a 3V
> >battery, so the complete set is (at least from a users point of view)
> >compatible with an NVRAM.  Therefore, you can edit it with the 'q' command
> >in the monitor.
> >
> Sorry about the loud text! I feel that a lot of people are not really
> listening. I can't get to the monitor.  After the system checks, the 4/110
> tries to boot from sd(0,0,0) then bounces to the PROM:pass requirement.  I
> have tried to access via ttya in diagnostics mode but after system checks I
> get locked out there as well (clever little PROM).  I do not have the
> original disk drive that was with the system and so I can't boot into it
> and enter as root to change the eeprom that way.  I have tried to boot a
> disk with Solaris on it I made on my Sparc 2 but it will not boot for some
> reason.  I may end up de soldering the chip extracting the data, writing it
> to another (sans the password) and reinstalling it (of course I would put a
> socket in there just in case).
> 
> Rick 
>