5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
0-4: 001fH 2-second units (0-30 valid)
5-10: 07e0H minute (0-59 valid)
11-15: f800H hour (0-23 valid)
5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
5-8: 01e0H month (1-12 valid)
9-15: e000H years since 1980 (0-119 valid)
Notes: These layouts are seen in directory entries (as when performing
57H (query/set file time/date).
DOS uses a different format for fns 2aH-2dH (system clock
Remember that the date value is relative to 1980 (the
approximate beginning of the IBM-PC era).
See Also: 5700H (query file time/date)
5701H (set file time/date)