IBM 3151 Manual To Operations page 68

KEY
Alternate Cursor
+-
Backspace
. +-Backspace
Break
•
~
Cancel
Keyboard Functions
FUNCTION
Selects among four .cursor types: block, blinking bar, blinking block,
and bar. The selected cursor type is saved and used the next time
power is turned on.
Moves the cursor to the left one position at a time.
Generates the break signal when the display station (1) uses
PRTS
or
IPRTS
for the line control and
RS-232C
for the interface or (2) operates
in echo mode.
Using this key, you can cause the host system to wait before it sends
data to the display station.
Ends data transfer to the host system or the optional device on the
auxiliary port. Also resets the
"KEYS LOCKED," "AUX NOT
READY,"
or
"AUX BUSY"
conditions.
Using this key, you can cancel either the print operation or the data
transmission to the host system.
. Chapter 3. Understanding the Keyboard Functions
3-5