MasterGear is a really great program to emulate the Sega Master System and Game Gear. It runs on Unix(X-Windows) and DOS. Find out all about it at the web page of its creator.
Now, I like MasterGear, but one thing it doesn't normally do is run under the linux Super VGA library. Instead it runs under X windows. Now, that's all fine and dandy, but I quite like SVGALib, so I wrote a little bit of code to allow it to be played under SVGALib. It seems to work quite well (touch wood).
To use, simply put the above two files in the SMS source directory, and type
patch < SvgaMG.diff
make mg
If you have any questions or comments, email me at tim@rose-cottage.demon.co.uk