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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.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 this function is never called by the program, the DTA defaults
     to a 128-byte buffer at offset 0080h in the program segment
     prefix.
 
     In general, it is the programmer's responsibility to ensure that
     the buffer area specified is large enough for any disk operation
     that will use it. The only exception to this is that MS-DOS will
     detect and abort disk transfers that would cause a segment wrap.
 
     The only handle-type operations that rely on the current DTA
     address are the directory search functions (Int 21h Functions 4Eh
     and 4Fh).
                                    -♦-