able
edit
functions
(INSERT
LINE
and
DELETE
LI NE) are inoperative in
Format
mode.
Format Mode (On-Line)-Operation in this mode
is
the
same
as
that
for
Forrl)at mode (Off-Line),
except
that
data entered
from
the keyboard
is
transmitted
to
the 1/0 port. For a block trans-
mission, a CR-LF
is
transmitted at the end
of
each
field
as
a
field
delimiter.
Print-On-Line Mode
The Print-On-Line mode
is
a selectable
keyboard
function
or
initiated
from
a remote
data source. The I
/0
baud rate
is
slaved
to
the
selected
printer
baud rate
of
the SUPER BEE
when the terminal
is
operating in the Print-On-
line
mode and
with
terminal in on-line mode.
The data sent
to
or
received by the terminal
is
both
displayed on the terminal and printed
by
the printer. Data transmitted
from
the terminal
is
sent
to
both
the I
/0
port
and the
printer
port
at the selected
printer
baud rate. The
CPU
must
supply null codes
as
required. In print-on-line
and
with
the terminal in off-line, the
printer
baud rate must
be
consistent
with
the I
/0
baud
rate. Keyboard data
will
not
be
printed while
off-line
and received data
will
not
be
displayed.
1.3.3 Display Organization
The display
is
organized on a
page
basis,
where the
page
contains 25 lines
with
80
char-
acter positions in
each
line.
Any
of
the
96
USASCI I codes
can
be
displayed on the
monitor
in a line-page organization.
If
a line in the
memory
has
less
than
80
characters, the displayed line
contains blanks
or
spaces
filled
to
the
80th
char-
acter.
Upon power-up
or
depression
of
the RESET
key, the Character mode
is
selected. In this mode
of
operation, the
CRT
monitor
displays all char-
acters and reacts
to
all
control
codes. A keyboard
or
1/0 code selectable Program
Entry
mode pre-
vents the terminal
from
reacting
to
control
and
escape
function
codes, and displays instead the
control
symbols and
escape
function
codes
as
reverse
video characters. In the Format mode
of
operation, protected
areas
of
the display
cannot
be
erased
or
overwritten.
When
it
is
required
that
data
serve
as
alarm
or
status indicators
or
direct
attention,
video
can
be
displayed
as
follows: (
1)
normal
Rev.
8/74
video
(white
characters on a black background);
(2) normal video blinking; (3) reverse video
(black characters on a
white
background); and
(4)
reverse
video, blinking. These
functions
are
initiated by
an
escape
sequence operation
which stores a single video
control
character
in memory and which
is
displayed
as
a
space.
The
reverse
video and/or
blink
field
is
termina-
ted by the end
of
the line
or
by either the
NEW LI NE
or
Line-Blink-Off codes.
Addition-
ally, all level video and
blink
control
codes
in memory may
be
reset
with
space
codes
by the Page-Blink-Off command.
1.3.4
Memory
Organization
The memory in the SUPER BEE terminal
is
organized in such a manner
that
only
the
display characters and receiving
control
codes
are
stored in memory. This
means
that
if
only
10 characters are
written
on a line,
only
1 O
memory locations
are
used
for
display
of
that
line. The other 70
spaces
on
that
line
are
not
stored. This technique
is
known
as
"effi-
cient paging.'-' The
total
number
of
memory
locations
is
2048. This means
for
instance
' '
that
through the
use
of
efficient
paging, 256
lines
of
7 characters
each
can
be
stored (The
maximum number
of
lines
is
limited
to
256).
Only 25 lines
of
memory data
can
be
displayed
at one time; however, the memory
can
be
scrolled up
or
down
to
bring any 25-line
window
of
the memory data
into
view.
WARNING:
Use
of
less
than 7 characters
per line may
cause
the terminal
to
jump
to
non-
existent memory and the
content
of
memory
to
be
non-recoverable. Loss
of
control
of
the terminal
may occur
until
power
is
turned
off.
When
a
CLEAR
operation
is
performed
the entire memory
is
filled
with
space
codes
and
the cursor
is
positioned home. The memory
is
then organized
as
80
characters per line and
displayed
as
an
entire blank screen. As data
is
entered, display characters replace the
space
character
as
defined by the cursor location.
The memory organization remains the
same
until
a
"NEW
LINE"
code
is
entered
into
the
terminal. The
"NEW
LI
NE"
code
is
stored
into
the display memory
at
the cursor loca-
tion
and terminates the display
of
that
parti-
cular line. (The remaining part
of
that
line
is
1-5
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