Path: utzoo!attcan!uunet!tektronix!tekcrl!tekgvs!keithe
From: keithe@tekgvs.LABS.TEK.COM (Keith Ericson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Reset Switch
Message-ID: <5208@tekgvs.LABS.TEK.COM>
Date: 23 May 89 03:41:16 GMT
References: <1966@ur-cc.UUCP> <18@consult.UUCP>
Reply-To: keithe@tekgvs.LABS.TEK.COM (Keith Ericson)
Organization: Tektronix, Inc., Beaverton,  OR.
Lines: 25

In article <1966@ur-cc.UUCP> chu2_ltd@uhura.cc.rochester.edu (Jim Huang) writes:
>I have an original 6mhz IBM PC AT (Model 5170) and I would like
>to wire up a reset switch so that when the system is really hung,
>i.e. Ctrl-Alt-Del has no effect, I don't have to shut the whole
>system down to reboot it.

I almost NEVER post things to worldwide distribution; but this one
is asked often enuff that it must be of universal interest, much
less international...

There is a signal line that comes out of the Power Supply that
signifies that the power is good (it's called the "Power Good" line,
by coincidence.)  By installing a switch to momentarily short this
line to ground the machine will go through its reset procedure.

The "Power Good" line (on ATs and Clones; I'm pretty sure on PC's
and XT's, too) is the line closest to the rear of the instrument.
Pick any of the black wires in the bundle as a ground line.

Have Fun.  And if you don't know how to proceed from this
description, DON'T!  If you can figure it out from this purposely
limited description you probably know enough to take on the project
without screwing it up too badly.  *I* ain't takin' the blame!!!

kEITHe