Hi PulkoMandy, > I'd like to write a driver to read floppies (or floppies images) from > my old Amstrad CPC. I have all the needed information on the > filesystem structure, but I don't really know where to start... I was in the same situation when I started to write vmwfs (a filesystem to access VMware shared folders) ;-) There is some documentation on the subject: http://factory.haiku-os.org/documentation/Haiku_Book_doxygen/html/fs_modules.html. The fat and iso9660 filesystems are relatively simple to understand. You can also take a look at the vmwfs sources at http://dev.osdrawer.net/projects/vmwaddons/repository/show/trunk/vmwfs, but I don't guarantee that I did everything correctly :-p Regards, Vincent