VISUAL
TECHNOLOGY
INCORPORATED,
RAILROAD
AVENUE,
DUNDEE
PARK,
ANDOVER,
MA
01810
4.5 ERASE
COMMANDS
All
erase
commands clear
only
foreground data. Foreground/background mode
is
retained.
ERASE END OF
FIELD:
Erases
foreground data
to
foreground
spaces
from
the cursor
to
the end
of
the field. The cursor remains in its position.
ERASE END OF
LINE:
Erases
foreground data
to
foreground
spaces
from
the cursor posi-
tion
to
the end
of
the line. The cursor does
not
move.
ERASE END OF PAGE:
Erases
foreground data
to
foreground
spaces
from
the cursor
position
to
the end
of
the screen. The cursor does
not
move.
ERASE PAGE:
Erases
foreground data
from
the entire screen. The
erased
areas
will
be
set
to
foreground
spaces.
The cursor
is
relocated
to
the home position.
4.6
FORMAT
COMMANDS
SET FOREG ROUND: Sets a mode where all data
following
the command
will
be
displayed
at
full
intensity. This mode remains
until
a set background command
is
received.
If
there
is
background data present on the screen, the beginning
of
each
foreground
area
will
be
a field
tab stop location.
SET
BACKGROUND:
This command
causes
all subsequent data
to
be
displayed at reduced
intensity. A
potentiometer
(rear most) located on
the
left
rear underside
of
the terminal
adjusts the intensity level
of
background data.
SET
SECURITY:
This command
causes
subsequent data
to
be
blanked
(not
displayed)
from
the screen.
RESET
SECURITY:
This command
causes
subsequent data
to
be
displayed.
BLINK
LINE:
This command
causes
the line in which
the
cursor
is
located
to
blink
at
a
5 Hz. rate.
Only
one line
on
the screen
can
blink.
If
one line
is
blinking
and this command
is
issued
with
the cursor on another line, the
first
line
will
cease
blinking
and the line in
which the cursor
is
located
will
now
blink.
Moving the cursor
from
the
blinking
line does
not
affect the
function.
The
line which
is
blinking
is
fixed
in location in-so-far
as
scrolling
is
concerned. When the screen
is
scrolled up
or
down
new data
will
enter the
blink
area
rather
than the
blink
area
moving
with
the data.
STOP
BLINK:
The stop
blink
command
will
reset the
blink
function.
The cursor need
not
be
located on the
blinking
line.
SLOW
SCROLL
ENABLE:
This command enables the slow scroll
function
wherein
the
screen
will
scroll at a slow smooth rate rather than a
quick
rate. This mode
is
particularly
useful at the lower data rates and long
messages,
allowing the operator
to
easily
read
the
data.
On power up and reset the terminal
is
set
in the slow scroll mode.
SLOW
SCROLL
DISABLE:
Disables slow scroll and places the terminal in the
traditional
fast scroll mode.
SET
HOLD
SCREEN: This command places the terminal in the hold screen mode.
After
entering the mode, data
will
be
displayed
until
the
point
when the screen
would
normally
scroll
(LF,
CUrsor Down in
ADDS
520+ and
ADM-3A+
modes, Cursor Right in
ADDS
520+ mode when at the
right
margin, receipt
of
the
80th
character on the
bottom
line
with
Auto
New Line set,
or
receipt
of
CR
with
Auto
LF set). The character which
would
cause
15
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