I've barely looked at LINUX, so I'm not sure how useful it is, but there is some code available at
http://www.global.yamaha.com/download/disklavier_markiv/
athomik
On Oct 24 2007, James Fry wrote:
>I also have a software background (and some hardware experience) and
>took a look at the MarkIV software.
>
>The MarkIV doesn't run RedHat, its an embedded distribution based on
>Redhat (as are many distros) that runs on a non-x86 cpu. Mounting the
>disk is likely easy, but not very useful. You can see quite a lot of
>stuff on the MarkIV install CDs, but I don't think there is anything
>useful there for the hobbyist hoping to make a PC based controller - its
>all for a different CPU, and all of the useful software is proprietary
>Yamaha software and will likely have licensing restriction. There are
>some playable media files there, but nothing interesting.
>