Terminal Control
The
alphanumeric
keys
cannot
be used to
enter
the
definition
of
the
attribute
field;
it
is
changed by
using
the
NEXT
CHOICE
and
PREVIOUS
CHOICE
function keys.
LABEL FIELDS.
There
are
two
eight
character
fields
that
may
be used to define
the
label
for each
programmable
function key.
The
first label field supplies
the
upper
half,
the
second
supplies
the
lower half.
Each
field
may
have
a video
enhancement
which
is
entered
program-
matically,
using
an
Ec
&f
escape sequence (described
later
in
this
section).
Control codes
and
escape sequences
may
be entered into
these
fields only by
using
Display
Functions
mode.
KEY
DEFINITION
FIELD.
The
entire
line (80 characters)
immediately
below
the
attribute
and
label fields is available for specifying
the
character
string
that
is to be displayed,
executed, and/or
transmitted
whenever
the
key is
either
pressed
or
programmatically
trig-
gered. Control codes
and
escape sequences
may
be
entered
into
this
field only by
using
Display
Functions
mode.
The
Display
Functions
mode used
here
is independent from
that
which is
enabled
or
disabled
via
the
mode selection function keys,
or
by escape sequences from
the
host
computer.
The
1:1
key
may
be used for including
<CR>
codes
in
key definitions
and
labels
in
combina-
tion
with
the
Display
Functions
mode.
If
Auto Line Feed mode is enabled,
the
1:1
key
will
generate
a
<CR><LF>.
If
Display Functions mode is
not
in
effect,
the
1:1
key
will
operate
as
a cursor movement key.
The
.,
•
and.
keys
can
be used for editing
the
contents
of
the
label
and
key
definition
fields.
To
exit
Definition mode
and
remove
the
User
Key Menu from
the
screen,
the
SAVE
CONFIG,
.,
.,
or
• keys
may
be pressed
and
the
normal display will reappear.
In
addition,
the
escape sequence ((Ec
k"
may
be used. When
this
escape sequence
is
used to
exit
Definition
mode,
or
when
the
• key is used,
the
function key labels
are
displayed across
the
bottom
of
the
screen
and
the
function key definitions
are
enabled.
If
the
SAVE
CONF
IG
key
is
used,
the
User
Key
menu
values
are
saved
in
nonvolatile memory.
2-12
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