Date: Mon, 11 Apr 2005 21:28:00 +1000 From: Peter Jeremy <PeterJeremy@optushome.com.au> To: Wilko Bulte <wb@freebie.xs4all.nl> Cc: freebsd-current@freebsd.org Subject: Re: Potential source of interrupt aliasing Message-ID: <20050411112800.GK89047@cirb503493.alcatel.com.au> In-Reply-To: <20050411093912.GE56099@freebie.xs4all.nl> References: <E1DKvIv-0008eB-RO@cs1.cs.huji.ac.il> <20050411093912.GE56099@freebie.xs4all.nl>
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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
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