From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailserv2.iuinc.com (IDENT:qmailr@mailserv2.iuinc.com [206.245.164.55]) by puffin.external.hp.com (8.9.3/8.9.3) with SMTP id LAA07442 for ; Wed, 29 Mar 2000 11:13:47 -0700 From: davisg@Celestica.com To: Philippe Benard cc: davisg@Celestica.com, Corne Beerse , parisc-linux@thepuffingroup.com Message-ID: <852568B1.005E6F18.00@tormta3.tor.cel.com> Date: Wed, 29 Mar 2000 12:11:37 -0500 Subject: Re: [parisc-linux] Couple of questions Mime-Version: 1.0 Content-type: text/plain; charset=us-ascii List-ID: Greetings, Phi wrote: > > > > There is no TOC button available on the Model 712. A special debug card is > > used by HP hardware and OS developers for TOC among other things on this > > platform. > > Not sure about it, but I think that pushing the white button 3 time, i.e from > ON state going OFF/ON/OFF (may be more don't remember) does trig a TOC, and > this is High prio, i.e for dump capable OS, this mean post mortem dump > analysis due to a hang possible (i.e what I like :-) > Ooops, I stand corrected, the power switch (used in this manner while running HP-UX) can indeed be used to trigger a TOC. However, I still assert that the power switch itself cannot be directly used to generate a TOC. Refer to the "lasi_ers.ps" on or about page 78. There is a diagram which describes the power switch control circuit. As described in this diagram and elsewhere in this document, the power switch generates a power fail interrupt to the CPU only. The hardware itself cannot directly trigger a TOC on the Model 712. But, apparently, you can cause a TOC on the Model 712 (while running HP-UX) by toggling the power switch a few times. I've tried, it works, I'll be damned, I didn't know that. Thanks for the insight! : ) Regards, Geoge G. Davis Software Engineer, Celestica Chelmsford Design Center 20 Alpha Road Chelmsford, MA 01824