Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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▀ If your program is going to use a record size other than 128 bytes, it
  should set the record size field at FCB offset 0EH after the file is
  successfully opened and before any other disk operation.
 
▀ If random access is to be performed, the calling program must also set
  the FCB relative-record field (offset 21H) after successfully opening
  the file.
 
▀ For format of directory time and date, see Int 21H Function 57H.
 
▀ Int 21H Function 3DH, which allows full access to the hierarchical
  directory structure, should be used in preference to this function.
 
▀ [3.0+] If the program is running on a network, the file is opened for
  read/write access in compatibility sharing mode.
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