Disklavier

I bought an upright Disklavier MX500QA last January.  At the time I 
was told that it only came with the controler that plays the old 
format disks.  Now when I see the specs on the same unit, it appears 
as though it is sold with the new type that has midi and pc 
connectors.   Do you know whether my unit will  play the new type 
disks (midi) or do I need to get another controler from Yamaha?

Thanks, Charlie