I don't have any mpX player where RockBox is working

[alker]

I don't have any mpX player where RockBox is working. I need boot-Loader for my mp4 player. Do you any can make Boot-Loader what work any mp4 players?

[saratoga]

If you're asking about what targets rockbox can run on, see the front page.

If you're asking about porting rockbox to a new device, see:

http://www.rockbox.org/wiki/NewPort