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To: fullermd@over-yonder.net
From: Warner Losh <imp@bsdimp.com>
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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?)
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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