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Vertical-scroll
display
control
mode
(12)
<DC2>
12
Purpose:
Sets
vertical-scroll
display
control
mode
(DC2)
and
permits
data
to
be
written
to
either
line.
When
the
display
position
is
at
the
last
position
of
the
top
line,
the
cursor
moves
to
the
first
position
of
the
bottom
line.
When
either
valid
character
data
or
a
Horizontal
Tab
command
is
sent
to
the
last
position
of
the
bottom
line,
the
data
on
the
bottom
line
is
transferred
to
the
top
line
and
the
cursor
is
moved
to
the
lower
left
position.
Note
that
a
Carriage
Return
command
does
not
cause
the
data
on
the
bottom
line
to
be
transferred
to
the
top
line.
This
mode
is
the
default
setting
for
power
on
and
reset.
The
display
remains
in
DC2
mode
until
a
DC1
mode
command
is
issued.
Cursor
on
(13)
<DC3>
13
Purpose:
Turns
on
the
cursor.
The
command
is
the
power-on
default
setting.
Cursor
off
(14)
<DC4>
14
Purpose:
Turns
off
the
cursor.
Reset
(1F)
<US>
1F
Purpose:
Causes
the
display
to
reset
some
programmable
parameters
to
the
power-on
state,
which
is
defined
as:
v
Cursor
on.
v
Scrolling
alphanumeric
message
off.
v
All
character
positions
filled
with
X'20'.
v
Write
position
for
next
write
at
position
X'00'
(top
left).
v
Default
code
page
(437)
selected.
v
DC2
mode
enabled.
v
Default
(Logic
Controls)
emulation
mode
selected.
v
Brightness
set
to
100%.
v
IBM
user-defined
characters
not
erased.
The
Logic
Controls
user-defined,
character
key
is
reset.
All
byte
values
between
X'00'
and
X'1F'
not
defined
in
this
section
are
ignored
by
the
display
in
Logic
Controls
mode.
User-defined
characters
in
the
IBM
mode
that
have
not
been
defined
previously
are
spaces.
Input/output
device
commands
11-9-2005
Appendix
A.
Input/output
device
commands
A-7
Содержание 31x
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