Re: [patch] vm86: Clear AC on INT

From: Alan Cox (
Date: Thu Aug 01 2002 - 12:47:16 EST

On Thu, 2002-08-01 at 17:21, Kasper Dupont wrote:
> Ehrm, that wasn't my point. My point was that if the feature exist
> in virtual 86 mode but not in real mode, the kernel should prevent
> it from being used in virtual 86 mode because it is supposed to
> emulate real mode.

That would prevent people wanting to run real virtualised 8086 stuff
that does use the AC trap, and other vm86 extensions to the basic real
mode stuff.

If you want an accurate real mode emulation you are stuck with Bochs,
not down to the kernel but down to the fact vm86 is a mode for running
8086 applications under a 32bit system, not a mode for emulation of real

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