If emulating classic DOS games seems like a pain, there's a DOSBox fork 'aiming for simplicity and ease of use', now standalone for the first time

Run the likes of Civilization and Daggerfall as God intended, now easily loaded directly from ZIP files.

Patent Info Suggests Nintendo Has Found Some Ingenious Ways To Make DS Games Work On NSO

How will you fit two screens in one? With some swapping, or shrinking, or just getting a second screen, apparently.