Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!amdcad!ames!ll-xn!mit-eddie!uw-beaver!tektronix!tekcrl!tekgvs!keithe
From: keithe@tekgvs.TEK.COM (Keith Ericson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Hard Reset Switch query
Message-ID: <3642@tekgvs.TEK.COM>
Date: 29 Jun 88 18:25:06 GMT
References: <4393@mit-vax.LCS.MIT.EDU>
Reply-To: keithe@tekgvs.UUCP (Keith Ericson)
Organization: Tektronix, Inc., Beaverton,  OR.
Lines: 34

The question of reset switches is a recurring one which should be
included in a Usenet First-time User's Guide.

	The following contains material which
	could result, if you're not careful, in
	completely wrecking your computer. Kids,
	do not attempt this on your parent's
	computer without their consent. Don't do
	it even WITH their consent.

The simplest way to install a Reset Switch is to wire a normally- open
pushbutton between the power supply's "Power Good" wire (to be
described shortly) and ground. As I recall, this yanks on the interrupt
controller's reset pin which in turn puts the processor through it's
reset/start-up procedure.

The "Power Good" line from the power supply is the (often orange-
colored) wire that connects to the power-connector pin CLOSEST TO THE
REAR/BACK/NOT-THE-FRONT of the computer. I've simply scraped away a
(very) small amount of insulation form this wire (shut the computer off
first) and soldered directly to it. If you're paranoid, wrap a little
tape around it. If you're real good with a small probing implement,
free the contact from the connector housing and slip some heat-shrink
insulation around the connection. Do the same with one of the (usually
black) ground wires and afix the wire from the other side of the switch
there. Or solder on some berg (tm, probably) pins and make a
disconnectable fitting. Anyway, don't be too afraid of it: you'll only
void about 10,000 warranties by doing this. And your the PC service
department will probably refuse to service it should it break. But now
you're a hardware jock and can fix anything, anyway right?

	HEY: BE CAREFUL. YOU MIGHT JUST RUIN THE COMPUTER!!!

keith