Date: Wed, 08 Jun 2011 09:17:03 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Jung-uk Kim <jkim@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, John Baldwin <jhb@FreeBSD.org> Subject: Re: svn commit: r222795 - head/sys/dev/atkbdc Message-ID: <4DEF13DF.4090103@FreeBSD.org> In-Reply-To: <201106071545.02850.jkim@FreeBSD.org> References: <201106062303.p56N3cjs053024@svn.freebsd.org> <4DEE773B.9090903@FreeBSD.org> <201106071532.01179.jkim@FreeBSD.org> <201106071545.02850.jkim@FreeBSD.org>
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on 07/06/2011 22:45 Jung-uk Kim said the following: > On Tuesday 07 June 2011 03:31 pm, Jung-uk Kim wrote: >> On Tuesday 07 June 2011 03:08 pm, Andriy Gapon wrote: >>> 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 >> >> Yes, that's exactly what I am seeing from all of my AMD systems and >> a 11-year old Pentium III system. >> >>> 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 >> >> INT 15h is relocated under 0xa0000, i.e., "highmem". Are you using >> non-FreeBSD chain loader? Ah, yes, it's a diskless boot using gpxe. > Do you have "relocate to highmem" option >> in the BIOS configuration? > > Sorry, it's actually under 640KB in conventional memory. It must be > done by TSR or boot loader. Ah, good ol'days... :-P > >> Most importantly, does it support keyboard typematic feature? At least there is a BIOS option for setting it. -- Andriy Gapon
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