You can’t run them natively. You run them through DOSBox.
Launch DOSBox and mount your dos folder. For example
mount c /home/pi/RetroPie/roms/dos
You can also add the mount command to the DOSBox config file located at /home/pi/.dosbox/dosbox-SVN.conf
. You add the command to the end of the file, in the [autoexec]
section. If there’s just one game you want to play, you can have the autoexec launch that game. Otherwise, you’re gonna have to whip out a keyboard. It is DOS after all :)
Here’s some more info:
http://www.codingepiphany.com/2013/03/30/raspberry-pi-retro-gaming-mania-part-2-dosbox/