Int 21 Fn Sect  - Dos 2+ - Get File's Last-written Date And Time           [!]

   AX = 5700h
   BX = file handle

Return: CF clear if successful
       CX = file's time (see #1351)
       DX = file's date (see #1352)
   CF set on error
       AX = error code (01h,06h) (see #1366)

Note:  under DR DOS 3.41 and 5.0, this function returns 0 (no date/time) for
     character devices; MS-DOS returns date and time of opening

See Also: AX=5701h,AX=5704h"Windows95"

Bitfields for file time:
Bit(s) Description (Table 1351)
 15-11 hours (0-23)
 10-5  minutes
 4-0   seconds/2

Bitfields for file date:
Bit(s) Description (Table 1352)
 15-9  year - 1980
 8-5   month
 4-0   day