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Date:      Mon, 31 Oct 2005 16:36:19 -0700 (MST)
From:      Warner Losh <imp@bsdimp.com>
To:        fullermd@over-yonder.net
Cc:        Alexander@Leidinger.net, phk@phk.freebsd.dk, freebsd-current@FreeBSD.org, rwatson@FreeBSD.org, davidxu@FreeBSD.org
Subject:   Re: TSC instead of ACPI: powerd doesn't work anymore (to be expected?)
Message-ID:  <20051031.163619.59657502.imp@bsdimp.com>
In-Reply-To: <20051031232711.GD1367@over-yonder.net>
References:  <20051031102424.V11619@fledge.watson.org> <81484.1130756628@critter.freebsd.dk> <20051031232711.GD1367@over-yonder.net>

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> > Another thing to remember is that the TSC and ACPI hardware is not
> > the only thing we have to deal with:  Any solution we implement
> > needs to also work on other architectures, including i486 with only
> > i8254 timecounters etc.
> 
> Boy, I'm just becoming the voice of not-so-new hardware, aren't I?  ;)
> 
> My PPro uses the i8254.  So does my P133 laptop.  I presume most other
> Pentium-era machines, and probably PII's, do as well.  When DID ACPI
> become the common case?

Most pentium-era meachine use the tsc timecounter UNLESS ACPI or APM
are configured....

Warner



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