"Request
For
Service"
code
DC1
is
sent
and
the
terminal waits
for
an ETB
to
begin trans-
mission. ,
1.3.9 Printer
Port
The
serial
printer
port
operates
at
RS232C logic levels and
outputs
negative-
true
data.
The
SUPER BEE terminal has
three
printer
communication
modes: (
1)
Print-On-Line, (2) Print
and
(3) Print-On-
line
while On-Line.
In
the
Print-On-Line
and while On-Line,
the
1/0 baud rate
is
slaved
to
the
selected printer baud rate
of
the
SUPER BEE. Data
sent
to
or
received
by
the
SUPER BEE terminal
is
both
dis-
played
on
the
terminal
and
printed by
the
printer. Data
transmitted
from
the
terminal
is
sent
to
both
the
1/0
port
and
the
printer
port
at
the
selected printer baud rate.
The
Print-On-Line
mode
is
selectable from
the
keyboard.
The
Print-On-Line mode
is
selectable from a
remote
data source,
initiated by
an
escape sequence
code
if
the
terminal
is
in
the
On-Line mode. In
the
Print-On-Line mode, data from
the
CPU
is
routed directly
to
the
printer, allowing
preparation
of
data
by
the
operator
while
the
CPU
is
out
putting
info
to
the
printer.
The
Print mode provides
the
capability
of
receiving
data
from
the
remote
data source
at
a baud rate
different
from
that
of
the
printer.
In
this mode,
the
CRT terminal
buffers between
the
printer
and
the
remote
data source.
The
Print
mode
is
selectable
from
the
keyboard
or
from a remote
data
source, initiated by
an
escape sequence code.
1.3.10
Input/Output
Port
The
1/0
port
operates
at
RS232C
logic levels and
outputs
and
receives nega-
tive-true data.
The
I
/0
port
outputs
data
to
and
inputs
data
from
the
remote
data
source when
the
terminal
is
in
the
on-line
condition.
1.3.11 1/0 Processor Board Strapping
There
are eight strappable
options
available on
the
SUPER BEE 1/0 Processor
board. These
options
are implemented by
installing
the
appropriate
strap on
the
16-pin strapping pad
(Sl).
A brief
summary
1-7
of
these strapping selections
is
provided
in
the
following paragraphs
and
detailed
in
Section 3.5.7.
Send Control Codes
All
escape
codes
entered
by
the
key-
board will be
performed
and
transmitted.
With
the
control codes
strap
installed, all escape
sequences are
performed
locally
only,
but
not
transmitted.
Go-Off-Line
At
the
beginning
of
a block
print
while On-Line, an ETX
is
transmitted.
At
the
end
of
the
block print,
the
on-line
mode
is
maintained. With a go-off-line
strap
installed,
the
unit
goes off-line
at
the
end
of
the
block
print
and no ETX
is
transmitted,
to
the
CPU. However, a CR-LF
is
sent
to
the
printer.
Store Special
Functions
Without
this
strap installed, special
function
codes
are
transmitted.
With
this
strap installed, special
functions
are
stored
only and
not
transmitted.
External Clock
The
SUPER BEE uses its
own
internal
clock. However, with this
strap
installed, it
provides
for
the
use
of
external clocks pro-
vided by a
modem
or
other
interface.
Synchronous
or
Asynchronous
Operation
The
SUPER BEE
is
configured
to
operate
asynchronously. With this strap
installed,
the
terminal operates
in
the
syn-
chronous
mode
and
generates words
of
eight bits. While operating
in
the
asynchronous
mode,
the
length
of
the
generated
word
is
determined
by
the
multiplier toggle switch
position.
In
the
110
position, an 11-bit
word
is
generated. A 10-bit word
is
generated in
the
150
position.
Block Transmit
With this strap installed,
the
SUPER
BEE
is
configured
to
perform
a block
transmit.
(This strap
is
installed as shipped
from
the
factory.)
Without
this
strap
the
SUPER BEE
is
configured
to
do
a page transmission.
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