I used to have a shit load of Atari and NES emulators on my 'puter before my hard drive took a dump. I remember during my last semester of college, I spent most of my free time playing classic NES games with my roommates while the PS2 and Game Cube sat idle in the living room!
I tried to hook up my actual Atari again, but I think it fried. My NES, however, works great.