IBM 2265 Manual page 14

Ibm 2265 display station model 1 and the ibm 2845 display control. the two units combine to form a display system that provides visual access to data stored in an ibm system/360
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Table
1.
Functions of 2265 Display Station Keys (Nondestructive Cursor)
Key
No Shift
Shift
Single-Character Keys
Cause symbol to be displayed.
Keyboard locks. No character is entered.
Keyboard may be unlocked by depressing
RESET key.
Double-Character Keys
Cause symbol on lower half of key to be displayed.
Cause symbol on upper half of key to be
displayed.
ENTER
Places EOM symbol in cursor position. Cursor does
Same
not move. 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 N L
symbol, data between N L 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 and EOM symbols remain
unmoved, but SOM is deleted. Keyboard unlocks
and ENTER PENDING light is extinguished.
\
If Write Addressed DS or Erase/Write Addressed DS
command is honored before a poll command, first
character of text over-writes EOM symbol. When
command is concluded, keyboard is unlocked and
ENTER PENDING light is extinguished. Enter
operation is ended.
If Write DS Line Address command is honored be-
fore a poll command, EOM symbol mayor may not
be over-written depending on line addressed and
length of text. When command is concluded, key-
board 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.
I
When command is concluded, keyboard remains
locked and ENTER PENDING light is on, indicating
Enter operation still pending.
PRINT
Places EOM symbol in cursor position. Causes all
Same
data from first character poSition in first line to
and including the EOM symbol to be printed by the
1053 Printer. Exceptions are NL symbols and data
to right of and on same line as NL symbols. How-
ever, an eOM symbol located to right of NL symbol
is printed. Keyboard is locked during print opera-
tion.
If 2845 is not equipped with Printer Adapter Feature,
no operation occurs.
NEW LINE
Cursor moves down one line. If it is already in bottom
Places N L symbol in cursor position.
DOWN
line, it moves to top line. Lateral position of cursor
Cursor moves to first character position
within display remains constant.
of next-lower display line. If cursor is
already in bottom line, it moves to first
character position of top line.
Data between NL symbol and end of
line is left undisturbed.
SHIFT
Permits function shown in "Shift" column for control
Same
keys, or enables selection of special character on upper
half of keys.
14

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