DOSBox is a DOS-emulator that uses the SDL-library which makes DOSBox very easy to port to different platforms. DOSBox has already been ported to many different platforms, such as Windows, BeOS, Linux, MacOS X...
DOSBox also emulates CPU:286/386 realmode/protected mode, Directory FileSystem/XMS/EMS, Tandy/Hercules/CGA/EGA/VGA/VESA graphics, a SoundBlaster/Gravis Ultra Sound card for excellent sound compatibility with older games...
You can "re-live" the good old days with the help of DOSBox, it can run plenty of the old classics that don't run on your new computer!
DOSBox is totally free of charge and OpenSource.

Most noticeable changes:
* Support for more graphics modes and cards.
* Improved Vista support.
* New OPL emulation cores.
* Sound fixes and improvements for Mac OS X.
* Lots of compatibility fixes.
* Lots of cdrom detection improvements.
* Lots of memory (EMS/XMS) improvements.
* Various fixes and enhancements for the recompiling core.
* Support for evdev.
* Lots of DOS fixes.
* Slightly faster!
* More stable.

The license of this software is Free, you can free download and free use this system utility software.