> > I wonder if there a way to check that we are realy in real mode ? > > Yes. In real mode bit 0 of the cr0 register should be 0. It is not as simple. There's stuff like "unreal" mode... real mode with 4GB descriptor limits... and similar crazyness. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html