Date: Tue, 07 Jun 2011 22:08:43 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org>, Jung-uk Kim <jkim@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: svn commit: r222795 - head/sys/dev/atkbdc Message-ID: <4DEE773B.9090903@FreeBSD.org> In-Reply-To: <201106071402.11620.jhb@freebsd.org> References: <201106062303.p56N3cjs053024@svn.freebsd.org> <201106070952.49563.jhb@freebsd.org> <201106071139.41955.jkim@FreeBSD.org> <201106071402.11620.jhb@freebsd.org>
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on 07/06/2011 21:02 John Baldwin said the following: > On Tuesday, June 07, 2011 11:39:26 am Jung-uk Kim wrote: >> On Tuesday 07 June 2011 09:52 am, John Baldwin wrote: >> The whole point of this commit is to blacklist *recent* BIOS (or CSM) >> from probing keyboard typematic information, more specifically, >> recent Intel chipset platforms. They don't support many INT 15h/16h >> functions but only cause trouble at best. OTOH, I haven't seen such >> problems with AMD chipset systems and they all seem to have >> traditional entry points at the interrupt vector table, for example. > > Err, but you didn't blacklist recent BIOS. You blacklist _all_ BIOS that use > entry points other than the ones from the UEFI spec, including BIOSes that > don't claim to support UEFI and the BIOS from the two systems I quoted. I'd like to simply add two datapoints: 1) recent AMD system: $ dd if=/dev/mem bs=4 iseek=0x15 count=2 | hd 00000000 59 f8 00 f0 2e e8 00 f0 2) very old PIIX/440BX system (manufactured ~1999): $ dd if=/dev/mem bs=4 iseek=0x15 count=2 | hd 00000000 9a 06 b8 9c 2e e8 00 f0 -- Andriy Gapon
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