Date: Tue, 11 Apr 2006 04:39:29 +0000 (UTC) From: Maxim Sobolev <sobomax@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/boot/i386/cdboot cdboot.s Message-ID: <200604110439.k3B4dTOD072774@repoman.freebsd.org>
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sobomax 2006-04-11 04:39:29 UTC
FreeBSD src repository
Modified files:
sys/boot/i386/cdboot cdboot.s
Log:
When enabling A20 put upper limit on amount of time we wait for the keyboard
controller to get ready (65K x ISA access time, visually around 1 second).
If we have wait more than that amount it's likely that the hardware is a
legacy-free one and simply doesn't have keyboard controller and doesn't
require enabling A20 at all.
This makes cdboot working for MacBook Pro with Boot Camp.
MFC after: 1 day
Revision Changes Path
1.14 +10 -3 src/sys/boot/i386/cdboot/cdboot.s
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