Plugging a DOS game to an SDL(2) library won't "just work". Some concepts are inherent to the hardware and the O/S. Hardware example: EGA (not the case of doo

Plugging a DOS game to an SDL(2) library won't "just work". Some concepts are inherent to the hardware and the O/S. Hardware example: EGA (not the case of doom, but of other, slightly older games) uses bitplanes, it's not just an array of byes; audio cards used specific drivers. O/S: timers may need to be emulated, as the game may not have a straightforward game loop; due to this, even exiting cleanly may not be trivial to implement.