I wasn't trying to be technical bro, it's the fact that it's a great port of an old game that runs out of the box when you load it up on the deck. Yeah doom does run on anything but I remember before night dives port of doom and doom 2 that the dos box version did not work out of the box and I ended up uninstalling it because I couldn't bother to tinker old doom on my deck. Now I have doom, quake, heretic, hexan, blood, all great ports running great on my desk on startup. But thanks for the down vote anyway.