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Table 2. Functions of 2265 Display Station Keys (Destructive Cursor)
Key
Single-Character Keys
Double-Character Keys
ENTER
PRINT
I
NEW LINE
DOWN
SHIFT
No Shift
Cause symbol to be displayed.
Cause symbol on lower half of key to be displayed.
Keyboard locks and ENTER PENDING light is lit.
Upon receipt of Specific Poll or General Poll command,
all data between SOM and EOM is sent to computer. If
this data contains an NL symbol, data between NL
symbol and end of line containing it is not sent.
If EOM is placed to right of NL symbol, all data
between SOM and the N L symbol immediately
preceding EOM is sent.
If no SOM is displayed, a zero-length message is
transmitted.
After successful message transmission resulting
from a poll, cursor remains unmoved, but SOM
is deleted. Keyboard unlocks and ENTER PENDING
light is extinguished.
If Write Addressed OS or Erase/Write Addressed
OS command is honored before a poll command,
first character of text overwrites EOM symbol.
When command is coneluded, keyboard is unlocked
and ENTER PENDING lightis extinguished. Enter
operation is ended.
If Write OS Line Address command is honored
before a poll command, EOM symbol mayor may
not be overwritten depending on line addressed
and length of text. When command is concluded,
keyboard-is unlocked and ENTER PENDING light
is extinguished.
If Read Addressed Full DS Buffer command is
honored before a poll command, no change occurs
on screen. When command is concluded, keyboard
remains locked, ENTER PENDING light is on,
indicating Enter operation still pending.
Causes all data from first character position in
first line to and including cursor to be printed by
1053 Printer. Exceptions.re NL symbols and
data to right of and on same Une as NL symbols.
However, an EOM symbol located to right of NL
symbol is printed. Keyboard is locked during print
operation.
If 2845 is not equipped with Printer Adapter Feature,
no operation occurs.
.
Cursor moves down one line. If it is already in bottom
line, it moves to top line. Lateral position of cursor
within display remains oonetant.
Destructive cursor
replaces any character occupying character position
into which it moves. Previous position occupied by
cursor is displayed as a
~.
Permits function shown in "Shift" column for
control keys, or enables selection of special character
on upper half of keys.
Shift
Keyboard locks. No character is entered.
Keyboard may be unlocked by depress-
ing RESET key.
Cause symbol on upper half of key to be
displayed.
Same
Same
Places N L symbol in cursor position.
Cursor moves to first character position
of next-lower display line. If cursor
is already in bottom line, it moves to
first character position of top line.
Data between N L symbol and end
of line is undisturbed.
Same
Introduction
17
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