VISUAL
TECHNOLOGY
INCORPORATED,
RAILROAD
AVENUE,
DUNDEE
PARK,
ANDOVER,
MA
01810
UNLOCK
KEYBOARD:
The unlock command
resets
the
keyboard
lock
function
and
allows
full
use
of
the keyboard.
All
keyboard modes previously established (caps
only,
on
line, etc.)
are
not
reset
by
this command.
SET PAD FUNCTION: The set
pad
function
sets
a mode wherein the keys on the numeric
pad
transmit
an
alternate code sequence when typed. Figure 3-4 defines
both
the normal
mode codes
and
the alternate mode
sequences
for
each
of
the numeric
pad
keys in each
of
the emulation modes. The alternate mode remains active
until
reset
by
the reset
pad
func-
tion
command, power
off,
or
reset function.
4.9
GRAPHICS COMMANDS
SET GRAPHICS:
The set graphics and reset graphics command
set
and
reset a mode where-
in subsequently received
chara~ters
from
column 6
and
7 (lower
case
codes)
of
the ASCII
chart
are
displayed
as
graphic elements rather than characters. Appendix II defines the
elements found in the Visual
200. The numeric digits
found
in this chart
are
subscripts. In
Hazeltine 1500+ mode the
tilde
("-')
is
used
as
the lead in character. The paragraph symbol
is
therefore generated
by
the carat
(1\)
code.
Please
note
that
each
character location on the
screen
can
contain
only
one code
(a
graphic symbol
can
not
simultaneously occupy the
same
location
as
an
alpha
or
numeric).
4.10
PRINTER
COMMANDS
COPY ON:
This command enables received data
to
appear on the screen, while simultane-
ously being sent
to
the
printer
through the
printer
port. The computer system must insert
appropriate
pad
characters required
by
the printer. The data rate
is
that
rate selected
for
the terminal (Right Bank
of
Switches, switches 6, 7, 8). In like manner the
parity
selection
of
the terminal
is
the
same
for
the printer.
COpy
OFF:
The copy
off
command disables the data path
from
the terminal interface
to
the
printer
port. Whenever this command sequence
is
sent
by
the computer while the ter-
minal
is
in the copy on mode the sequence
will
arrive at the
printer
before the terminal
disconnects the copy
output.
TRANSPARENT
ON: This mode operates
in
a manner similar
to
Copy On, except
that
received data
is
sent
only
to
the printer. The CRT
screen
does
not
receive any data while in
this mode.
TRANSPARENT
&
COpy
OFF:
This command resets either
or
both the copy on
function
or
the transparent on
function.
P R I
NT
PAG
E:
The
print
page
command
causes
the contents
of
the
screen
to
be
printed
through the
printer
port.
The
printer
in this mode operates at the
same
baud rate and
parity
as
the communications interface. Printing takes place
from
home up
to,
but
not
including,
the character at the cursor position.
If
the cursor
is
placed at the home position
prior
to
issuing the
print
page
command the entire
page
will
be
printed. Data compression
is
initi-
ated on a line
by
line
basis
with
a carriage return code and line feed code automatically
inserted at the completion
of
each
line.
When
printing
only
a
portion
of
a
page
the cursor
should be placed at the
left
margin
of
the line
following
the last line
to
be
printed. This
insures
that
the last line
is
completely printed including the carriage return
and
the line feed.
17
To Next Page
Loading...