From owner-freebsd-hackers Sat Sep 11 23:50: 8 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from dingo.cdrom.com (castles554.castles.com [208.214.165.118]) by hub.freebsd.org (Postfix) with ESMTP id 7A4AC14F6E for ; Sat, 11 Sep 1999 23:50:04 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (LOCALHOST [127.0.0.1]) by dingo.cdrom.com (8.9.3/8.8.8) with ESMTP id XAA00669; Sat, 11 Sep 1999 23:43:04 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Message-Id: <199909120643.XAA00669@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: Chuck Robey Cc: Mike Smith , Luigi Rizzo , hackers@FreeBSD.ORG Subject: Re: damn ATX power supplies... In-reply-to: Your message of "Sat, 11 Sep 1999 00:22:53 EDT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sat, 11 Sep 1999 23:43:04 -0700 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > > any idea on how to force ATX power supplies to restart after a power > > > outage without having someone press the 'power' button on the front > > > panel ? All the motherboards i can find now have their bios with two > > > options: > > > > > > Disabled > > > no automatic restart on power failure > > > > You _should_ be able to change this. > > > > > none of them is satisfactory especially for picoBSD things such as > > > routers or firewalls where an UPS is overkill... > > > > You can always hotwire the supply; go dig up a pinout for the ATX power > > connector and you'll see that if you ground the power-on line the PSU > > will come up... > > It's not just a ground, the line that brings up the power is a momentary > switch, so a longish (about 1/2 second) pulse would do it. That would The switch is not connected to the power enable line to the ATX power supply; it's connected to logic on the system board which in turn (in some cases) drives the PE line. If you ground the power enable line for 1/2 a second, you will get (at most) 1/2 a second of power. Sheesh. You could at least speak from _experience_ here. -- \\ The mind's the standard \\ Mike Smith \\ of the man. \\ msmith@freebsd.org \\ -- Joseph Merrick \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message