VISUAL
TECHNOLOGY
INCORPORATED,
540
MAIN
STREET,
TEWKSBURY,
MA
01876
6.2.10 Bits per Character
This feature determines whether 7
or
8 data bits
will
be
used
for
each
character.
If
8
bit
code
is
elected, the most significant
bit
(bit#8)
is
always set
to
space
(0).
6.2.11 Busy Polarity
This feature determines whether the terminal interprets
the
Printer Busy signal
as
a
true
high
level
or
a
true
low
level.
The setting
of
this feature depends on the
printer
being used. Some printers
"swing"
their
Printer Busy lead high when busy and some printers swing
their
Printer Busy lead
low
when
busy. Check
your
printer
documentation
for
the correct setting
of
this feature.
6.2.12
Print
Speed
PR
I
NT
SPEED indicates the rate
that
data
will
be
transmitted
to
the attached printer.
The
print
speed
is
changed
by
depressing the
ITJ
key when in SET-UP P mode. The
printer
option
provides
for
the
same
16 baud rates
as
the
communication
interface (50 -
19,200 baud).
6.3 PRINTER COMMANDS AND MODES
This section describes
the
commands and modes
used
to
control
an
attached printer. The
commands and modes provided operate in identical fashion in
both
ANSI in
VT-52
modes,
however,
the
control
sequences
used
for
printer
commands and modes
will
vary depending
on
whether
VT-52
or
ANSI mode
is
selected. In all
cases,
space
suppression
is
performed on
a line basis, i.e. all
trailing
spaces
on
each printed line are
not
transmitted
to
the
printer.
Embedded
spaces
on a line
are
always transmitted.
NOTE
Space suppression
is
not
applicable in Printer
Controller
or
Copy mode.
6.3.1
Print
Line/Page Commands
The
Print
Line/Page commands may
be
initiated via remote command
from
the host
or
by
the
operator
from
the
keyboard. When the Print Line/Page
function
is
initiated
the
terminal
will
use
the
XON/XOFF
synchronization codes.
XOFF
will
be
sent
to
the
host upon initia-
tion
of
a
Print
Line/Page
function,
and XON
will
be
sent
to
the
host on conclusion
of
the
Print
Line/Page
function.
Each line
will
be
transmitted at
the
selected
print
rate and be
ended
with
the
CR/LF
codes.
(If
LF suppress
is
enabled,
only
CR
will
be
sent
to
the
printer).
Table 6-2 summarizes the various ways
to
obtain hard
copy
via
the
Print
Page/Line
Commands.
6.3.2
Copy
Mode
Copy
mode allows a variable number
of
lines
to
be
output
to
the
printer
and
is
available
only
when
the
terminal
is
in ANSI mode. When Copy mode
is
entered, all data received
by
the
terminal
will
be
sent
to
the screen and the
printer
simultaneously.
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