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OTHER SYSTEM FUNCTIONS
27.4.2
Change file
27.4 --
Diskette File Functions
and RES contain the full image of the
director~
entr~.
DEN
will
cont~in
the
computed
di~ector~
entr~
number.
The
remainder
of
the
DFT
is
unchanged.
The
sector
buffer
contains
the
current
directory
sector.
IT
no
directory
entr~
was
r
0
un d ,
the d ire c tor yen try fie
1 d
$
NAM
through
RES,
inclusive,
will
be
unchanged.
DEN and the
contents
of
the sector buffer are indeterminate.
B
=
2.
The
DFT
is affected the same as
for
3=1.
B
=
4.
If
a
neUl
directory
entry
UJas
13
=
B
=
B =
created, RIB and DEN will reflect the
appropriate values for
the new
entry.
The
sector
buffer
will contain the
current directory sector.
If
a
new
entry was not created (duplicate Tile
name),
then the
DFT
will be
affected
in the same way as for
B=l.
S.
The exit conditions ror this case
are
the
same
as
for
B=4.
In
addition,
if
a
-dup
1
icate
entry
already existed in -the directory,
the
directory
entry
fields
NAN through
RES,
inclusive, UJill contain the full
image
of
the
duplicate entry.
DEN
will
also
contain
the
duplicate
entry's directory entry number.
16.
If
the
entry
is
deleted,
the
complete
directory
entrtJ
will
be
returned
in
rields NAM through RES,
inclusive.
In addition,
RIB will
be
z er o.
The
contents
of
the sector
bufTer
are
i
ndetermi
nate~
If
the
en tr
lJ
is not deleted, all parameters
except
RES
and DEN !JIill be unc hang ed.
RES,
DEN
and
the
contents
oT
the
sector buffer will be indetermi nate.
32.
The DFT is affected in the
same
way as for
B=l.
name/attributes
--
. CHANG
The .
CHANG
functi9n alloUJs a directory entry to have its
name~
SUTTix~
and/or attribute fields changed.
Page
27-17
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