The feat is made possible thanks to a jailbroken iPad and DOSPAD (based on DOSBox) which was installed from the Cydia repo: http://cydia.litchie.com.
8bitsince86 has posted a zip file with his dospad configuration and a couple batch files made to load games within Windows. Before you can use those files you will need to follow instructions to install Windows.
Here's a tutorial for DOSBox (Android); however, the steps are similar for DOSPAD (iOS).
Check out the video below or hit the link for more details...
Read More [via Antoine]