I have some abandonware downloads, but I've been trying to support these games by buying them from sites like Good Old Games (GOG.COM).
GOG is really great because they also weed out MOST of the incompatibilities, add extras like sound tracks, sell the games CHEAP and DRM free and run deals all the time.
No, I don't have any stock in the company. But if I could, I'd soooo buy in!