I doubt you're anything else than some dumb troll screwing around in the forums, but
You could of course just use simple, raw square/saw/triangle/sine waves and (bitcrushed perhaps) white noise- it will turn out sounding pretty authentic, that's for sure. But if you don't want to roll like that, scroll through the December MAC07, you might find some of the links provided through the first pages of the thread useful. also here
Or ask somebody who's experienced with chiptunes (unlike I, who have no idea what I'm talking about), Advertise-play and Pixlcrushr are the NG people on top of my head