From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: setup.S: A20 enable sequence (once again)
Date: 6 Nov 2000 11:56:04 -0800 [thread overview]
Message-ID: <8u72ck$7i1$1@cesium.transmeta.com> (raw)
In-Reply-To: <00110618083400.11022@rob>
Followup to: <00110618083400.11022@rob>
By author: Robert Kaiser <rob@sysgo.de>
In newsgroup: linux.dev.kernel
>
> The attached patch fixes this by doing "fast A20" enable first and then
> checking if A20 already is enabled. If it is, the keyboard controller sequence
> is skipped. This works for me, so, could people please have a look at this.
>
I just looked at the code, and it's worse than I first thought: if
memory location 0x200 happens to contain 0x0001 when the kernel is
entered, this code with loop indefinitely.
-hpa
--
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"Unix gives you enough rope to shoot yourself in the foot."
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next prev parent reply other threads:[~2000-11-06 19:57 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-06 16:50 setup.S: A20 enable sequence (once again) Robert Kaiser
2000-11-06 19:10 ` H. Peter Anvin
2000-11-06 21:30 ` Alan Cox
2000-11-06 22:06 ` H. Peter Anvin
2000-11-06 19:56 ` H. Peter Anvin [this message]
-- strict thread matches above, loose matches on Subject: below --
2000-11-06 19:29 Robert Kaiser
2000-11-06 20:16 ` H. Peter Anvin
[not found] <200011062003.VAA11818@rob.devdep.sysgo.de>
2000-11-06 20:20 ` Robert Kaiser
2000-11-06 20:43 ` H. Peter Anvin
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