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From: "H. Peter Anvin" <hpa@transmeta.com>
To: Rogier Wolff <R.E.Wolff@BitWizard.nl>
Cc: "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: Linux Post codes during runtime, possibly OT
Date: Sun, 28 Jan 2001 02:18:19 -0800	[thread overview]
Message-ID: <3A73F1EB.B6F69A93@transmeta.com> (raw)
In-Reply-To: <200101281012.LAA04278@cave.bitwizard.nl>

Rogier Wolff wrote:
> 
> Ok. I've thought about it some more, but I don't care enough about
> this issue to do the painstaking legwork: I don't have one of those
> POST-code indicators on port 0x80.
> 
> I've made the "pause" in outb_p just a few (*) ns slower, because it
> now loads a variable before outputting the value to port 0x80. As the
> whole idea about this is "pausing", making it a bit slower shouldn't
> matter too much.  I've tested it: It compiles, it boots.
> 
> I'm not too familar with the syntax of the "asm" statement. So I may
> illegally be modifying the AX register. I don't care enough about this
> to figure it out right now.
> 

It is; you'd have to specify "eax" as a clobber value, and that is
undesirable.

And you're still overwriting the POST value written by the BIOS.

	-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
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  reply	other threads:[~2001-01-28 10:19 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-01-25 21:46 Linux Post codes during runtime, possibly OT Ian S. Nelson
2001-01-25 22:26 ` H. Peter Anvin
2001-01-25 22:31   ` Matthew Dharm
2001-01-25 22:32     ` H. Peter Anvin
2001-01-25 22:41       ` Matthew Dharm
2001-01-25 22:45         ` H. Peter Anvin
2001-01-25 23:08       ` Richard B. Johnson
2001-01-25 23:10         ` H. Peter Anvin
2001-01-26 13:58           ` Richard B. Johnson
2001-01-26 16:19             ` H. Peter Anvin
2001-01-26 17:54               ` David Welch
2001-01-29  2:35               ` Paul Gortmaker
2001-01-27 10:20   ` Rogier Wolff
2001-01-27 20:47     ` H. Peter Anvin
2001-01-27 21:01       ` Rogier Wolff
2001-01-27 21:24         ` H. Peter Anvin
2001-01-28 10:12           ` Rogier Wolff
2001-01-28 10:18             ` H. Peter Anvin [this message]
2001-01-28 11:03               ` Rogier Wolff
2001-01-28 17:22               ` Jamie Lokier
2001-01-28 22:34               ` Pavel Machek
2001-01-29 15:09                 ` Richard B. Johnson
2001-01-29 19:21                 ` H. Peter Anvin
2001-01-28 22:29         ` Pavel Machek
2001-01-30 17:44         ` Mark H. Wood
2001-01-30 18:10           ` Richard B. Johnson
2001-01-30 18:16           ` mirabilos
2001-01-30 18:36             ` Richard B. Johnson
2001-01-30 18:41               ` mirabilos
  -- strict thread matches above, loose matches on Subject: below --
2001-01-26 15:41 Petr Vandrovec
2001-01-26 15:07 ` Richard B. Johnson
2001-01-26 15:15   ` Mark Hahn
2001-01-26 15:31     ` Jamie Lokier
2001-01-26 16:03       ` Richard B. Johnson
2001-01-26 16:22         ` Jamie Lokier
2001-01-26 15:42 Manfred Spraul
2001-01-26 16:07 ` Richard B. Johnson
2001-01-26 16:33   ` Brian Gerst
2001-01-27 12:28     ` Pavel Machek

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