From owner-freebsd-current@FreeBSD.ORG Mon Apr 11 11:28:18 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9E62616A4CE for ; Mon, 11 Apr 2005 11:28:18 +0000 (GMT) Received: from mail16.syd.optusnet.com.au (mail16.syd.optusnet.com.au [211.29.132.197]) by mx1.FreeBSD.org (Postfix) with ESMTP id CEEA043D1F for ; Mon, 11 Apr 2005 11:28:17 +0000 (GMT) (envelope-from PeterJeremy@optushome.com.au) Received: from cirb503493.alcatel.com.au (c211-30-75-229.belrs2.nsw.optusnet.com.au [211.30.75.229]) j3BBS1Qp029048 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Mon, 11 Apr 2005 21:28:02 +1000 Received: from cirb503493.alcatel.com.au (localhost.alcatel.com.au [127.0.0.1])j3BBS07l097987; Mon, 11 Apr 2005 21:28:01 +1000 (EST) (envelope-from pjeremy@cirb503493.alcatel.com.au) Received: (from pjeremy@localhost)j3BBS0k3097986; Mon, 11 Apr 2005 21:28:00 +1000 (EST) (envelope-from pjeremy) Date: Mon, 11 Apr 2005 21:28:00 +1000 From: Peter Jeremy To: Wilko Bulte Message-ID: <20050411112800.GK89047@cirb503493.alcatel.com.au> References: <20050411093912.GE56099@freebie.xs4all.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050411093912.GE56099@freebie.xs4all.nl> User-Agent: Mutt/1.4.2i cc: freebsd-current@freebsd.org Subject: Re: Potential source of interrupt aliasing X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Apr 2005 11:28:18 -0000 On Mon, 2005-Apr-11 11:39:12 +0200, Wilko Bulte wrote: >On Mon, Apr 11, 2005 at 12:34:01PM +0300, Danny Braniss wrote.. >> ... >> > It's a pity that the modern PC is hamstrung by design decisions made >> > over 25 years ago. >> >> sorry, but couldn't help it :-) >> >> The US Standard railroad gauge (distance between the rails) is 4 >> feet, 8.5 inches. That's an exceedingly odd number. Alternative measurements of 1435mm or 4.787nsec are just as odd. >> Why did the English people build them like that? > >Why would any sane person continue to use inches, feet, stones, yards >etc etc anyway? That could be the problem :-). If the CPU and PCI bus is built using imperial measurements whilst the northbridge/southbridge is a metric BGA, the electrons could be getting confused by the changes in units and are arriving at the wrong interrupt pin. :-) :-) -- Peter Jeremy