It has been April since my last post. I have been coding up the structures to handle the basic FAT filesystem. I am at the point where all I have left is complex kernel code to figure out. These issues are as follows.

1. Bringing an inode by number into memory from disk, or accessing it already there. Up till now I had a file struct pointer.
2. Identifying what that inode is (regular file, directory, irregular file,...:)
3. Determining if slack space exists
4. Getting to the last logical block to read or write
5. Writing the inode in cache back down to disk (aka The Cache Incoherency Problem)

I have a few other issues that are minor and are not worth mentioning unless they really start to cause problems. More later.