Date: Wed, 5 Dec 2001 14:44:50 -0600 From: Alfred Perlstein <bright@mu.org> To: "PSI, Mike Smith" <mlsmith@mitre.org> Cc: hackers@freebsd.org Subject: Re: Tracking down system freeze Message-ID: <20011205144450.L92148@elvis.mu.org> In-Reply-To: <3C0E641B.F65BAC6@mitre.org>; from mlsmith@mitre.org on Wed, Dec 05, 2001 at 01:14:51PM -0500 References: <3C0E641B.F65BAC6@mitre.org>
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* PSI, Mike Smith <mlsmith@mitre.org> [011205 12:12] wrote:
> Hi all.
>
> Does anyone have ANY suggestions on how to determine where the
> kernel/program is when the system freezes??? Even hardware solutions,
> such as the infamous paperclip across two pins will do.
Ohh... the infamous paperclip trick...
That's what I used to debug the wi wireless driver.
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Ok, now..
What you do is fold a paperclip then use it to make the last
two pins of the ISA bus short:
here
vv
________________________________
| || || || || :: :: :: | [-] <- blow up diagram
| || || || || :: :: :: | [ ] make paperclip short
| || || || || :: :: :: | [ ] the last two terminals
| || || || || :: :: :: | [ ] that face each other
| || || || || :: :: :: | [ ]
| || || || || :: :: :: | [ ]
| || || || || | [ ]
| || || || || \_____/ | [ ]
| PCI slots |
| \________/ |
| ISA slots |
| |
| |
|________________________________|
Be warned, this doesn't work on all motherboards!
The one that I had that it didn't work on didn't have any damage
though.
--
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.'
http://www.morons.org/rants/gpl-harmful.php3
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