From owner-freebsd-current Fri Nov 17 10:36:16 2000 Delivered-To: freebsd-current@freebsd.org Received: from post.mail.nl.demon.net (post-10.mail.nl.demon.net [194.159.73.20]) by hub.freebsd.org (Postfix) with ESMTP id 01D5E37B479 for ; Fri, 17 Nov 2000 10:36:12 -0800 (PST) Received: from [212.238.54.101] (helo=freebie.demon.nl) by post.mail.nl.demon.net with smtp (Exim 3.14 #2) id 13wqMt-0004pa-00; Fri, 17 Nov 2000 18:36:11 +0000 Received: (from wkb@localhost) by freebie.demon.nl (8.11.1/8.11.0) id eAH6duL01025; Fri, 17 Nov 2000 07:39:56 +0100 (CET) (envelope-from wkb) Date: Fri, 17 Nov 2000 07:39:56 +0100 From: Wilko Bulte To: Warner Losh Cc: Sheldon Hearn , Alfred Perlstein , "Steven E. Ames" , Soren Schmidt , Boris Popov , Valentin Chopov , current@freebsd.org Subject: Re: CURRENT is freezing again ... Message-ID: <20001117073956.C814@freebie.demon.nl> References: <2967.974461715@axl.fw.uunet.co.za> <200011171826.LAA75925@harmony.village.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <200011171826.LAA75925@harmony.village.org>; from imp@village.org on Fri, Nov 17, 2000 at 11:26:02AM -0700 X-OS: FreeBSD 4.2-BETA X-PGP: finger wilko@freebsd.org Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, Nov 17, 2000 at 11:26:02AM -0700, Warner Losh wrote: > In message <2967.974461715@axl.fw.uunet.co.za> Sheldon Hearn writes: > : The problem with a hard lock-up out of which you can't escape into the > : debugger is that it makes meaningful bug reports impossible. My non-SMP > : workstation has exhibited apparently arbitrary lock-ups since the advent > : of SMPng. > > You can also short IOCHK to ground to get an NMI which kicks you into > the debugger, even in an interrupt context. I have a card I built > from an old multi-function card to do this. I think it is A1 and A2, > but I don't have my ISA bus spec handy. Just stick a metal pin (ballpoint works well) into the ISA connector between the pins closest to the back of the machine. That is IOCHKN and GND respectively. Wilko [hardware designer gone bad..] -- Wilko Bulte Arnhem, the Netherlands wilko@freebsd.org http://www.freebsd.org http://www.nlfug.nl To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message