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According to the JamesM tutorial, if I with Paging activated, a Page Fault Exception should fire.

And so, how will drivers works?

For example the video driver that points to 0xB8000 shuld generate an Exception, right?

Thanks

You need to identity map those parts of memory you want to write to, so that when the driver tries to access 0xB8000 it is allowed to do so.