What's DOSBox?

DOSBox emulates an Intel x86 PC, complete with sound, graphics, mouse, joystick, modem, etc., necessary for running many old MS-DOS games that simply cannot be run on modern PCs and operating systems, such as Microsoft Windows XP, Windows Vista, Linux and FreeBSD. However, it is not restricted to running only games. In theory, any MS-DOS or PC-DOS (referred to commonly as "DOS") application should run in DOSBox, but the emphasis has been on getting DOS games to run smoothly, which means that communication, networking and printer support are still in early development.

How do I install it?

Go to http://www.dosbox.com/download.php?main=1 and download the appropriate file for your operating system. Then install the file

It's installed, and now?

Set up a directory in your local computer for games. For example you can use c:\dosgames and then copy every game in there. For example:

C:\DOSGAMES
├───colonization
└───ultima7

Now run DOSBox and write

mount c c:\dosgames
c:

Now you should be able to run your games:

cd ultima7
ultima7

How can I set it to full-screen mode?

Press Alt+Enter

And that's it?

That's it. You can find further information in these links:

http://www.dosbox.com/wiki/Main_Page
http://vogons.zetafleet.com/index.php?c=7