If you are still interested in emulating these games, there were versions of both games released for both the Commodore 64 and NES.
Here's a link to the C64 emulator at clickgamer (only $6.95). I use
Morphgear for most of my emulation, but the NES module is 20 big ones. I used to use Pocket Nester available
here at freewareppc.com.
PocketNES is another free option.
I've been an Ultima fan since Ultima 3, myself, and I still log on to Ultima Online when I'm extremely bored (I've just played the game to death :rolling: ).
While many people seem to vehemently prefer games made specifically for the ppc platform over emulation, I have always enjoyed both. Legacy, for example, has been great so far.