I tried MESS, and that thing is a mess regarding Atari 5200 emulation...... only plays a little handful of games.
I like "jum52" since this plays a bunch of games, however, it does not display correctly on my TV ..... it does not allow me to play around with the resolution settings, so my TV card interface displays two small game images on the left side of the screen, rather than one big fullscreen image. This occurred on a couple other emulators I had, but once I played around with the resolution settings, I was able to find a match which worked.
Also, I still can not find a 5200 emulator which plays "Wizard Of Wor", "Pitfall" and "Pitfall2". I remember loving "Wizard of Wor" when I was much younger ..... but can not find one to play now....
I downloaded the "vss" emulator but it had horrible sound, although if I use the VDMSound2.1.0 application (as "vss" recommends), I can correct the sound problems but then I can not figure out how to configure a frontend to use the VDMSound interface?
Basically, does anyone know of any other 5200 emulator which plays games well?