Roland XV-5050 belongs to the Super JV / XV / Fantom synth line.
It also has the waveforms of Super JD JD-990. They are PCM synths with various inter-oscillator modulation routings (called Structures).
Here are quick sound demos of its Ring-Modulation / Booster structures.
I'll add more contents in time.
Roland XV-5050 (2002)
Sound Examples
Here are .mp3 sound examples of Roland XV-5050.
All sounds are recorded without external effects.