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Doom (DOS extender games) is an easier protected mode application as it does not use complex page tables. Linux is much more complex.

I have faith in you!!

If modern x86 microcode ever gets sufficiently understood and reverse engineered I bet someone gets a PLAYDOOM instruction working. (I know it's been at least partially implemented on FPGAs)

haha, this was my first thought when I read the headline, because this "classic test" always comes up here :-))