PLOT
When this
key is
pushed
in,
the text is blanked except
for
the
first line
of
the
page.
This first line, however, is
displayed on
each of the four bottom
lines
of the
screen. The screen area above the bottom four lines is
divided into 128 scan
lines.
See
Pictorial r-2. A
dash,
one character
wide,
will appear above each of the
characters displayed
in the bottom four lines. The
position
of the dash above
the bottom line
(line
0) is
proportional
to the binary value of the
z-bit ASCII
code
for
that character. For
example, a CTRL/SHIFT
P,
or
ASCII
null, is all zeros,
so
its binary value
is
zero,
and
it
appears
at
the bottom
of the 128 line
space
directly
above the
ASCII
null. Pictorial r-g
fllustra-
tion
Booklet, Page 2) gives
the
line
number and the
ASCII
code for each key
entry.
A RUB
OUT
(delete)
or
all ASCII L's
has a binary value
of
727,
so the dash
appears at the top line
(line
128) in the
space above
the rub
out character.
In
the
plot
mode,
all characters are
written
into
RAM,
but their special cursor
movements
are
not im-
plemented.
That
is,
a
RETURN
(carriage
return) is
written
into
RAM,
but the cursor does not move. Any
control
character that appears
in the text will flash.
Even though
the
lower-case alphabetic
characters
cannot be
generated from the keyboard,
they can be
L I NE
(B
INARY
VALUE I27)
LIN
(B
INARY
VALUE O)
entered into RAM
from
the digital
computer, Like
all
other
characters,
the binary value
of the lower
case
characters
is
stored in RAM
and
the dash is
d.isplayed
on the appropriate
line
in
the 128-line
space. Lower
case
characters
stored in
RAM
are
displayed
as the
characters
represented
by
the ASCII
words
010 0000
through
o17 71,'17.
BAUD
RATE
When this key is
released
(out),
the
Terminal will
operate at
110 baud. When this key is
pushed
in, the
rate is set by the BAUD RATE switch on
the rear
panel.
The rear
panel
switch selects either
300 baud
or the
preset
baud.
The
preset
baud
is
determined
by a
jumper
wire on
the I/O circuit board.
OFF LINE
When
this
key
is
pushed
in,
the
Terminal is inhibited
from transmitting
or receiving data from
the serial
I/O,
but it
does not interrupt
transmission
or
recep-
tion through
the
parallel
I/O
port.
This lets
you punch
or
read
tape
on
the
paper
tape reader/punch
while
the
Terminal
is
off
line from
the digital computer.
NON-
',iil,
r^rc
3iililfijfi
PICTORIAL \-2
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