I have found about 75% of the old games I have on disk (I have a lot of games on disk, haha) run fine on my 3000 towers if I disable the cache from boot menu and choose ocs display. Some even require pal. If you do not wish to wear out a floppy drive I would also suggest WHDLoad. I have found even some 1200 games run, like Zool but the screen sometimes messes up.
