Date: Tue, 21 Feb 1995 18:49:45 -0800 (PST) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: mark@communica.oz.au (Mark Newton) Cc: mrm@sceard.com, freebsd-hackers@FreeBSD.org Subject: Re: 2.0-950210-SNAP hangs Message-ID: <199502220249.SAA23235@gndrsh.aac.dev.com> In-Reply-To: <9502220232.AA21379@augean.eleceng.adelaide.edu.au> from "Mark Newton" at Feb 22, 95 12:57:16 pm
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> > > > >Does anyone have any suggestions on how to debug a problem like this > > >when there is no indication of where to start before it manifests itself > > >and no way to perform a post mortem after it has happened? > > > > Yeah, fun. Where are those front panel lights when you need 'em? > > Y'know, that's something I've often thought about: An ISA-bus profile card > with jumpers on it connecting LEDs to bus lines, with the LEDs inset into > a 5.25" drive bay blanking plate -- Blinkenlites on a PeeCee! It'd be worth > it for the debugging value it'd have the potential to have, and even more > worth it for the strange looks it'd get. > > One of these days I may even be in a dumb enough mood to do it :-) I've used a POST card and added outb's to the POST display port so I can see how far it gets before things blow up to debug things in the past, it works, but you do have to be able to compile what ever it is you are trying to debug. > - mark -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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