Disklavier

can anyone tell me where there is a succinct listing of all the Yamaha  
models and their compatible operating systems..  or preferred file  
source...

I mean, good grief as long as MIDI standard has been out it seems like  
every unit has some sort of proprietary file system, designed  
utilized, maintained, and written by Yamaha for that piano only.. I  
never have heard of so many file types and endings.. whatever happened  
to just plain MIDI data.. ?

i have had a Yamaha c-6 (bought new) for 20 years.  I just want some  
piano music that plays MIDI files through MIDI out (DKC-100R) from a  
computer and not those dumb little floppies but everything I try to  
download seems to have pedal sustain data missing...  anyone help?   
thanks... it's frustrating.

Its an awesome piano.. but eberything but a Yamaha sourced disc seems  
whacked.

Richard