quoted
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
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(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html