Dreamcast Question

Hey guys, I was just wondering if it is possible to play Dreamcast games on PC? If not, how far has the Dreamcast emulation has gone through? I want to be able to download the games and play them on an emulator running my PC. Just want save a few bucks if it can happen.

Thanks to all who took the time to read this.

Chankast and DEmul are pretty good, but not perfect. They allow you to play many games, but not perfect. Since 99% of all Dreamcasts can play backups without modding them, I would suggest you just to buy one. They are pretty cheap anyway.