The Gameboy Advance emulator allows you to play gba games on your computer. To do so you must download a game you want, i reccomend using limewire to find some gba games. Once found save it into a folder you will remember then go onto your gba emulator and load the game. Once done enjoy playing! ^^
The games ran at full speed (with sound) on my Celeron 900 Mhz., so if you have a similar or faster PC you shouldn't have any problem either. A Pentium III 500 Mhz. is the absolute minimum requirement to play games. The Gameboy Advance is a 32-bit machine so emulating it requires more CPU power.
Download:
Visual Boy Advance