Table of Contents
Advertisement
KEYBOARD CONTROLS
4023
Users
Used
as
a
preparatory
command
key
to notify
the
Terminal
that
the
next
character
is
to
perform
a
function
other
than
its
normal
function.
For
a
keyboard example,
pressing
ESC
then simultaneously
pressing
the
SHIFT
and L keys
is
the
keyboard
equivalent
of
the
PAGE
key.
Works
only
in
Buffer or
with an
Echo
condition.
A
dual function
key
whose
function
depends on
whether
the
SHIFT
key
is
pressed or
not
pressed.
Pressing
without
SHIFT
causes
all
unprotected data
on
a
formatted
display
to
be
erased.
Protected data
(form
headings,
etc.)
is
not
erased. Pressing
with
SHIFT
causes
a
clear
page
(erase)
function.
All
displayed
information
is
erased
(including
non-
displayed information such
as Field
Attribute Codes),
the
Terminal
logic
is
reset
to
the
initial
condition,
and
the cursor
resides
at
the
home
position
(upper
left
hand
corner
which
corresponds
to the
first
character
position of the
first line).
Used with formatted
displays to
tab
the
cursor
to
the
first
character
position of the
next unprotected
(input)
field.
The
first
character
position
in
an
unprotected
field
serves as
a
tab
stop.
If
no
unpro-
tected
fields
are
found
on
the
display,
the cursor
returns to the
home
position.
In
Direct
with echo,
TAB
causes cursor
to
move
one
space
right.
:; I
..,;:.
V
'
CL
»
KJ
-
\™%-_;
.;.
"'w'
-.,
'"-
_
Causes
character
key
inputs to
be
interpreted
as
control
commands.
Used
with
SHIFT
and
character
keys
to enter control
commands.
For
example,
simultaneously
pressing
the
CTRL
and
K
keys
performs
a
"back
tab"
function.
Pressing
key
down
causes
TTY
LOCK
to
be
in
effect.
All
lower
case characters
are
then displayed
and/or transmitted
as
upper
case
characters, regardless
of condition
of
SHIFT
key.
Key must
be
pressed
a
second time
to
unlock.
Used
with character keys
to
shift
them
to
upper
case;
used
with
CTRL
and
letter
keys
to
enter
control characters.
1-14
Fig.
1-9
(A)
®
Advertisement
Table of Contents
