Once upon a time (on the "Classic" systems) there was a machine 
instruction which would cause an immediate warmstart or coolstart 
(and maybe additional options, but I'd have to check the old 
"Classic" machine instruction set manual).

I worked on a government project with a few dozen HP3000s scattered 
around the globe that were often unattended, and that machine 
instruction came in very handy as I could remotely reboot a system when needed.

I don't know if that "Classic" code would work on an iX box.  Maybe 
Stan would know.

John

At 2008-03-26 09:01 PM, Hawkins, Jim (HP, MPE/iX Lab) wrote:
>Jeff wrote:
> >There was, at some point in the 3000s history, a facility for automatic
> >recovery from a system failure (Easytime?  Autoboot?).
>
>AUTORESTART/iX
>ISL> start -R
>-R turns system aborts from an infinite loop displaying "Bxxx DEAD 
>xxxx" into a poke of a magic address which causes the equivalent of 
>a "Control B (GSP)>TC".
>You then need an AUTOBOOT flag set to do an automatic "main> bo pri" 
>or equivalent.
>Then IF you have AUTOBOOT file configured (via SYSGEN) the ISL can 
>read commands out of in (like DUMP and START -R RECOVERY) and 
>possibly get back to the MPE colon prompt. . .
>
>UPS Monitor:
>Will call preventative system abort if you're on battery and the 
>battery is near death.
>UPS Monitor actually clears the -R flag to protect you from trying 
>to reboot with little remaining power.
>
>PDC (PA-RISC Processor Dependent Code):
>As Craig mentions some HPMCs seem to cause "TC" or "RS" like 
>behavior.   Without autoboot flag and AUTOBOOT you should get stuck 
>in the pre-ISL steps of boot-up.
>
>
>Jim
>
>-----Original Message-----
>From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On 
>Behalf Of Jeff Kell
>Sent: Wednesday, March 26, 2008 4:54 PM
>To: [log in to unmask]
>Subject: Re: [HP3000-L] Unexpected boot on HP3000
>
>Herb Statham wrote:
> > Has anyone on the list gone through an "automatic" boot on a HP3000 box
> > before? If so, were you able to identify what caused the machine to
> > reboot itself? Our HP3000 is a 959-KS400 running MPE6.5 power patch
> > level 2.
>
>There was, at some point in the 3000s history, a facility for automatic
>recovery from a system failure (Easytime?  Autoboot?).  It would dump
>memory to disk, and reboot itself.  But this was generally propagated by
>a system failure.
>
>Did the system completely reboot, or pause at an ISL prompt?
>
>It sounds suspiciously like a power failure at the main processor, or
>some other "reset" (certain hardware machine checks) that initiated the
>hard reset.
>
>Jeff
>
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>2008-03-25 07:17 PM


John
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