Beware of this module. I have the MT-200 and it has extensive polyphony issues with lots of stuck notes when used as an SC-55 for games. It's very nice for recording and sequencing away from a computer, though.
Hmmmm.. Sounds like the FG-10 I had. This was sort of an sc-55 in an mt-32 casing, with built in melodies and a timer (it was called Roland Music Timer for a reason of course). This had some troubles when using it as a playback device for midi files as well.