I played a couple of the Ultima games on a Nintendo console, IIRC. I tried to find a computer version, but couldn't turn up much except Ultima Online. <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" />
There is a group recreating
Ultima V: Lazarus using the Dungeon Siege engine. When they are done, they hope to get permission from Origin to distribute it. However, from the fine print, it looks like you have to own a copy of the original PC game, as well as Dungeon Siege.