GAMES:Ultima VII Part 2: Serpent Isle

Ultima VII is playable through Exult, which may be preferable to emulating it in DOSBox, but you should check the current status of Serpent Isle support in Exult as it tends to be less well supported than The Black Gate.

Alternatively, a guide to running it in DosBox can be found here: http://www.bootstrike.com/Ultima/Online/u7dosbox.html