IBM 2265 Manual page 15

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Table
1.
Functions of 2265 Display Station Keys (Nondestructive Cursor) (Cont)
Key
No Shift
Shift
SPACE/ERASE
Advances cursor one character position, with no
Erases character position to right of cur-
ADVANCE*
other modification of display. If cursor is already
sor and advances cursor one character
in last character position of bottom line, it moves
position. If cursor is already in last char-
to first character position of top line.
acter position of bottom line, it moves
to first character position of top line.
BKSP (Backspace)*
Backs cursor by one position with no erasures.
Same
If cursor is in first character position of screen,
it moves to last character position of screen.
START
Cursor moves up one line on display. If cursor is
1. If no SOM symbol is displayed else-
UP
in top line, it moves to last line. The lateral posi-
where on screen, an SOM symbol is
tion of the cursor within the display remains
placed in position occupied by cursor
constant.
when key is depressed. Cursor is ad-
vanced one character position.
2. If an SOM symbol is already being
displayed when key is depressed, all
display data between existing SOM
symbol and cursor (except data on
same line as and to right of an NL
symbol) is erased. Cursor moves to
first character position following
existing SOM symbol.
3. If an SOM symbol is already being
displayed and if cursor is in same char-
acter location as SOM when key is
depressed, cursor is advanced one
character position. No further
change occurs.
I n the preceding cases, cursor
position identifies first character that
will be transmitted by 2845 upon
depression of ENTER key.
4. If an SOM symbol is already being
displayed and if cursor is to right of
and on same line as an N L symbol
when key is depressed, all display
data is erased starting with position
immediately following SOM symbol.
Erase continues, observing NL sym-
bols as in 2, until SOM is erased.
Cursor ultimately occupies same
position as when key was depressed.
RESET
Key is ineffective during time a command Same
(except Write Printer) is in process.
Following the attempted execution of an
invalid keyboard operation, termination of
a command operation with other than STX/
EOT, or detection by 2845 of an internal
parity error (resulting in keyboard lockup),
restores keyboard operation. When depressed
after ENTER key depression but before
Specific Poll or General Poll command is
received, cancels Enter operation and un-
locks keyboard. No change in displayed
image occurs.
When depressed after PRINT key has been
depressed, causes immediate end of print
operation and unlocks keyboard. Cursor
moves to display position immediately
following last character transferred to 1053
Printer.
*Rapid cursor positioning may be performed with this key. That is, if depressed to its final stop, the key's operation is repeated at about
nine characters per second as long as the key is held depressed.
Introduction 15