Either I did not RTFM, or I did not see that far into the project. Somehow (I don't recall doing it manually) the FileSystem in my CF0 mountlist was set to CrossDOSFileSystem, and I was operating under the assumption that I would keep that. I later switched back to fat95 when CrossDOS wouldn't recognize the large FAT cluster size.
Does fat95 support writing to FAT32, or just reading? And is it stable for doing so?
