DOSBox provides a full DOS environment, but by default it does not have access to any of your Windows files and folders. Thus, before you can run a program in DOSBox, you must mount its folder inside ...
If I play video games they're usually pretty low tech ones. One of the few games I miss from the old days is Duke Nukem, and I'm talking about the Duke before he went 3D. If you have an old DOS game ...