Chapter
4
I
MS-DOS
Disk
Allocation
02H Hidden file. The file is excluded from nor-
mal directory searches.
System file, The file is excluded from nor-
mal directory searches.
The entry contains the volume label in the
first
11
bytes. The entry contains no other
usable information (except date and time
of
creation) and may exist only in the
root
directory.
10H The entry defines a sub-directory, and is
excluded from normal directory searches.
20H Archive bit. The bit is set
to
1
whenever the
file has been written to and closed.
Note: The system files (I0.SYS and MSDOS.SYS)
are marked
as
read only, hidden, and system files.
Files can be marked hidden when they are created.
Also, the read only, hidden, system, and archive at-
tributes may be changed through the Change Attri-
butes function call (43H).
04H
08H
OCH-15H Reserved.
16H-17H Time the file was created
or
last updated. The
hour. minutes. and seconds are mapped into two
ytes
as
followS:
Offset 17H
Offset 16H
MMM
7 16
15
H
MMM
4
1:
12
I1
I0
I
where:
HHHHH
MMMMMM
59)
SSSSS
increments
is the binary number
of
hours (0-23)
is the binary number
of
minutes (0-
is the binary number
of
two-second
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