Atari
810
Disk
Drive
251
number
of
the
la
st character acce
sse
d
within
that sector
will
be
assigned
to
the variable named in character.
The sector
number
returned
is
the absolute sector
number
on
the diskette.
It
can be any
number
from
1
to
719.
Remember
, a
file's sector
numbers
need
not
necessarily be sequential. For
example,
the
first sector
for
a file
might
be sector
57,
the
second
147,
the
third
32
, etc.
The
POINT
statement moves
the
file
pointer
to
the
sector and
character
number
specified.
Any
subsequent
file
access
will
begin at
the
new
file
pointer
location specified by POINT.
POINT
uses
the
following
configuration:
POI NT #channel, sector, character
The file
open
under
the
channel
number
specified
will
have its
file
pointer
moved
. The file
pointer
will
be
moved
to
the
sector
number
indicated
in sector, and the character
within
that
sector
indicated
by character. Both sector and character must
be
numeric
variables. Constants may
not
be used.
If the fi
Ie
poi
nter
is
moved
to
a sector
not
assigned
to
the
file
opened
under
the channel
number
specified in
channel,
one
of
the
following
errors
will
result when
an
attempt
is
made
to
read
from
or
write
to
that
file
.
Error
170
(End
of
File)--Attempted
read.
Error
171
(Point
Invalid)--Attempted
write
.
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