VISUAL
TECHNOLOGY
INCORPORATED, 540
MAIN
STREET,
TEWKSBURY,
MA
01876
5.
TERMINAL PROGRAMMING
5.1
GENERAL
As previously noted, the
VISUAL
100 operates according
to
two
different
programming
standards - American National Standard lnstitute's (ANSI) X3.64 standard
of
1977,
and
DEC'S VT-52. This section details the control codes and control sequence functions
used
to
control the
VISUAL
100 in both ANSI
and
VT-52 modes.
A reference card which summarizes all remote commands
is
located near the rear
of
the
manual, and Appendices I,
11,
and
111
also summarize all remote commands.
5.2
CONTROL
CODES
This section describes
how
the
VISUAL
100 responds
to
received control codes. Control
codes
are
defined
as
codes from columns one
and
two
of
the ASCII code chart
and
the
DEL
code (octal 177).
Not
all control codes
have
an
effect on the
VISUAL
100. The
control codes
that
do
have
an
effect on the
VISUAL
100
are
the
same
in ANSI
and
VT-52
modes and
are
listed in Table 5-1.
5.3
CONTROL
SEQUENCE FUNCTIONS
This section describes how the
VISUAL
100 responds
to
received Control Sequences. The
section
is
broken down
into
two
major segments - Control Sequences recognized in VT-52
mode
and
Control Sequences recognized in ANSI mode.
Control Sequences
used
to
control the optional Buffered Printer Interface
are
not
included
in this section.
See
Section 6.
5.3.1 Control Sequences Recognized in VT-52 Mode
The
VISUAL
100
will
decode and respond
to
the
following
Control Sequences, when
received in VT-52 mode.
Move Cursor Up,
ESC
A
This sequence
causes
the cursor
to
move up one line.
If
the cursor
is
positioned on the
top
line no action
will
occur.
Cursor Down,
ESC
B
This sequence
causes
the cursor
to
move down one line.
If
the cursor
is
positioned on
the
bottom
line no action
will
occur.
Cursor Right,
ESC
C
This sequence
causes
the cursor
to
move right one position.
If
the cursor
is
positioned in
the last column
of
a line no action
will
occur.
Cursor
Left,
ESC
D
This sequence
causes
the cursor
to
move
left
one position.
If
the cursor
is
positioned in the
first
column
of
a line no action
will
occur.
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