From owner-freebsd-questions@FreeBSD.ORG Tue Mar 23 22:04:33 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3C37916A4CE for ; Tue, 23 Mar 2004 22:04:33 -0800 (PST) Received: from www.mcmanis.com (www.mcmanis.com [66.125.189.29]) by mx1.FreeBSD.org (Postfix) with SMTP id ECBAF43D1D for ; Tue, 23 Mar 2004 22:04:32 -0800 (PST) (envelope-from cmcmanis@mcmanis.com) Received: (qmail 49037 invoked from network); 24 Mar 2004 06:14:41 -0000 Received: from home.mcmanis.com (HELO manowar.mcmanis.com) (66.125.189.30) by www.mcmanis.com with SMTP; 24 Mar 2004 06:14:41 -0000 Message-Id: <6.0.0.22.2.20040323220519.025e72c0@66.125.189.29> X-Mailer: QUALCOMM Windows Eudora Version 6.0.0.22 Date: Tue, 23 Mar 2004 22:09:18 -0800 To: Nathan Kinkade , Steve Ireland From: Chuck McManis In-Reply-To: <20040323164411.GE12464@nkinkade.bmp.ub> References: <405FCE37.5060104@users.sourceforge.net> <038c01c4109d$858a4dc0$1a01a8c0@blackstar.net> <20040323164411.GE12464@nkinkade.bmp.ub> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed cc: freebsd-questions@freebsd.org Subject: Re: disconnecting keyboard: big trouble !?! X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Mar 2004 06:04:33 -0000 At 08:44 AM 3/23/2004, Nathan Kinkade wrote: >Can anyone on the list point me to a manufacturers site or documentation >that unequivocally states in clear terms the real dangers of hotplugging >a PS/2 device? Like some of the other people who have replied, in the >past I have hot-plugged many a PS/2 device to no detriment. However, I >now only do it if there is no other practical alternative just to be on >the safe side. No because you would need the schematic of the mainboard and no manufacturer will give you that (go figure.) Power is supplied on the PS/2 pin and the WinHEC "standard" calls for there to be a fuse on that supply. If you short the power pin to ground while attempting to plug in something (or while unplugging) and blow that fuse, the motherboard is toast. This is not a user replacable part. (you'd have to find it amongst the many surface mount parts if it wasn't already in the PS/2 shroud, and then you would have to pull just that part off the board. I'm sure if you get the Intel ATX Motherboard documentation (need a signed non-disclosure with Intel) it specifies the size/type of fuse. --Chuck