Ver 2.07 

New file system  like dos.

  CHDIR pathname
 To let current-folder move to new 'pathname'.
 Currentp-folder is the folder working present.
 In the file specification of each command,
  when it is omitted specifying absolute path with "/"(root) at the beginning,
  it's judged as a file under current folder.
 By 'chdir' command, it's possible to move current folder
  to the location of "current-folder/pass-name" newly.(subordinate move)
 By description "../" of the beginning,
  it's possible to move to upper pass relatively.(multiple description OK)
   chdir "test"
   'move to "mnt/sdcard/and.bas/test/"
   chdir ".."
   'move to upper folder
   chdir "../txt"
   'move to upper folder, and move to lower "txt/".

 File system
  There are two basic current-folder to handle the file, the next.

  Specifying SD card side:
  Startup subpath(followed behind the current-folder)

  Specifying main storage side:
  Startup subpath(followed behind the current-folder)

  When specifying SD card side and start-up,
  usually, it start from here.(and.bas/ is subpath)
  (Sometimes, there are different case by depend on the model,
   the majority of the models will be in this location)

  A part of this subpath can move by 'chdir' command.
  but can not go up to upper than current-folder.

  The 'mkdir' command can create a new folder.

  Key-assign state is saved main storage side.
  The current folder name can be acquired in 'curdir$()'.

  Save & load by command.

  When the head start with "/", it mean to have specified the full path.
   e.g.    load"/mnt/sdcard/my/test/file1.bas"  just described location.

  When non "/" beginning,
  it's judged as the path & file-name that it continue in present current-folder.
   e.g.    load"file1.bas" -> mnt/sdcard/and.bas/file1.bas  (judged as this)

  And, to refer to hierarchy upper, "../" can be used like DOS.(multiple OK)
   e.g.    load"../my/file1.bas" -> mnt/sdcard/my/file1.bas  (judged as this)
  (up to upper 'sdcard/' once, and down to 'my/')
  *The location without access permission can't be accessed.

 Load by dialog (Menu>Load)
  The file list is displayed, it can be loaded by touch & selection.
  When folder(sentence-end"/") is chosen, it will be in the folder movement.
  For move to hierarchy upper, chose '..'.

  When load file, it became that it have been 'chdir' to the location automatically,
  Current-folder is transferred to that location.
  *When finish dialog by back-button, load is not executed,
  Only current-folder move by 'chdir' is done.

  When chose 'New folder', it becomes text input mode for folder-name,
  A new folder can be made.

 Save by dialog (Menu>Save)
  It can input file name and save.
  It's saved in the location of the current-folder.
  By entering the path-name at the head,
  it can specify the path following a current.

  When want to specifiey the path of the hierarchy upper,
  Please put the "../" in the head,(multiple OK)

  File deletion management:
  Program 'filedel.bas' can do file deletion work in the current folder.
  (Selected one is deleted)
  (Not empty folder cann't be deleted)
  File name can also be changed by choosing 'Rename'.