Escape
Codes
INTRODUCTION
___
Appendix
A
Escape codes
are
a device
which
allows
terminal
operations to be executed from a
program.
When a
terminal
receives
an
escape code from
an
executing
program,
it
performs
the
operation
specified
in
the
escape code.
Escape codes consist
of
most
of
the
operations performable
at
the
terminal
using
the
non-
alphanumeric
keyboard
keys.
Such
operations include control
of
the
following:
Cursor
location,
sensing
and
selection
Display
and
workspaces
(next
page,
insert
line, etc)
Margins
and
tabs
Display
enhancements
User-defined
keys
Terminal
modes (auto linefeed, local echo, etc)
Alternate
character
set
selection
Graphics
status
request
Terminal
status
request
Terminal
self
test
and
reset
Peripheral
devices
All escape codes
begin
with
the
escape
character
ttEc"
(produced
with
the.
key), followed
by
the
body
of
the
escape code.
The
body
of
the
code
can
consist
of
one
or
more
of
the
keyboard
letters
and
symbols. Most escape codes
can
also be performed by
entering
them
from
the
keyboard. However,
if
the
terminal
is
in
Remote mode,
the
escape code will be executed only
if
the
host
computer
is
echoing
the
terminal
input
(the
ttLocal
Echo"
field
of
the
Terminal
Configuration
menu
set
to No).
NOTE:
If
the
body
of
an
escape code consists of more
than
one
character
and
ends
in
a letter,
THE
TERMINATING
LETTER
MUST BE CAPITALIZED; otherwise,
the
escape code
will
not
be recognized
as
such.
For
example, Ec&dA (not
Ec&da).
A-l
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