hazeltine 2000 Operating Manual page 10

no
lab stops
set, the
tab
key
will
cause
the
cursor
to
move
to
the
lower
right
hand corner
of
the display.
(See
discussion
of
fore
ground /background
in
"operation" section.
2.
ESC
Escape
Use
of this
key
is
optional
depending on communication
soft-
ware
being used.
ESC
generally
is
used
to
generate
a
pro-
gram
interrupt
signal.
3.
CTRL
(Control)
The
control
key
is
used
in
conjunction with other
character
keys
to
generate non-printing characters
for
a
number
of
reasons including security, function
codes,
etc.
When
CTRL
is
used
it
should be
depressed and
held while the
other required
character key
is
depressed.
CTRL
sends
special
codes
by
altering the
code
pattern of
the
other
key used with
it.
4.
LF
(Line
Feed)
The
LF
key causes
the
line
feed character
to
be transmitted
when
operating
in
standard
full
or
half
duplex
mode
but
has no
other
effect.
It
does
not
move
the
cursor
down
the
screen and
does
not
cause
the
line
feed
character
to
be stored.
The
line
feed character
is
stored
In
BATCH
but not executed.
5.
CR
(Carriage Return)
The
CR
key
moves
the
cursor back and
down
to the
beginning
of the
next
lower
line
thereby accomplishing
both carriage
return and
line
feed.
6.
RUBOUT
The
RUBOUT
key causes
a character
of
all
"one" bits to
be
sent out.
Usually rubouts are
used as
"filler"
characters
when program
execution delays are required.