Specifications
OPERATION
24
lines/page
48
lines/page
Area
of
memory
in
which
data
will
scroll
Area
of
screen
in
which
data
will
scroll
<
-
Lines
of
page
2
^
that
will
scroll
Figure
3-7.
Locking Lines
Example:
Suppose that
Lines/page
is 24.
To
lock rows
10,15,19,
and 20,
move
the
cursor
to
row
10
and
enter
the
sequence
ESC ! 1
move
the
cursor
to
each
of the
other
rows
and
enter
the
sequence
In
this
situation,
lines
10,15,19,
and 20 are
locked, i.e., excluded from scrolling. Only
the
unlocked
lines
scroll.
The
first unlocked line
of the
page,
in
this case line
1,
is
identified
on the
Status Line
as
line
1,
the
second unlocked line
as
line
2
and so on.
Line
10
on the
Status
Line
is the
data
on
line
11
in
memory (the data
on
line
10
in
memory
is
locked,
and
thus
not
counted here). Line
20,
the
last line
of the
scrolling area,
is the
data
on
line
24 in
memory.
When
all
lines
are
unlocked again, data scrolls
in the
usual
way.
NOTE
If
lines
per
page
is 48 or 96,
scroll-order
of the
locked lines depends
on
which unlocked lines
were
on-screen when
all
lines
were
unlocked.
3-17