fat12 file system

[xyjamepa]

hi every body....
i have just finished my small kernel with commands such as:
help,version,reboot....
so now i want to start writing the file system and i want it to be fat12 so can any one tell me a little about it and give me some source code for commands such as dir...
and i'll be so greatfull...

[Cjmovie]

The OS-Faq is your friend .

http://www.osdev.org/osfaq2/index.php/FAT12%20document

[xyjamepa]

please i need some source codes

[xyjamepa]

okay guys give me some help here
some source codes whatever...
just help me

[Dex4u]

Ok theres some code written for people like you, that includes the "dir" commend etc.
Its available here: http://alexfru.chat.ru/epm.html#los4d
In the "OS Development for Dummies" part and you need to get "OS Loader" along with the source code.

[xyjamepa]

okay now i want to make a command to creat a new text file
or a new directory
please can you help me with this?

[Pype.Clicker]

may i suggest you google for "FAT12 driver sources" ? plenty of open-source projects such as MenuetOS or FreeDos should have these.

That should look like:

Code: Select all

   ede = locate_empty_directory_entry();
   write_directory_entry(ede, filename, etc)
   firstcluster = locate_free_cluster_in_FAT();
   set_cluster(ede, firstcluster);
   while (still some data to write) do {
      write_to(current_cluster);
      next_cluster = locate_free_cluster_in_FAT();
      FAT_chain(current_cluster, next_cluster);
      current_cluster = next_cluster;
   }
   update_file_size(ede);