IBM 3708 End-User Reference page 31

• Cursor Movement Functions (Tab, Backtab, New Line, and Home)
The following functions move the cursor to the first position in a field, All four
functions can cause the cursor to wrap from the end of the last line on the
display to the beginning of the top line,
Tab Moves the cursor to the first character location of the next input
field, In a screen with no input fields, the cursor is moved to the
upper left hand corner of the screen.
Backtab When the cursor is located in the field attribute location or the first
character position of an input field, the backtab function moves the
cursor to the first character position of the preceding input field.
When the cursor is located in any character position of an input
field, other than the first position, this function moves the cursor to
the first position of that field. If there are no input fields, the cursor
is positioned to the upper left corner of the screen.
New Line Moves the cursor to the first input character position of the next line.
If the next line has no input fields, the cursor is moved to the next
line containing an input field. If the screen contains no fields, the
cursor is repositioned to the first position of the next line.
Home Moves the cursor to the first input character position on the screen ..
If there are no input fields, the cursor is positioned to the upper left
hand cbrner of the screen.
• Erase EOF (End of Field)OPl
If the cursor is located in an input field, this function erases the characters from
the cursor to the end of the field (erased characters are set to nulls). If the field
spans more than one line, only the remainder of the current line is erased. The
cursor does not move.
Using this function when the cursor is located in an attribute character position
or in a protected field locks the keyboard. The "go elsewhere" status line
message (X <
-op-
> ), is displayed. To unlock the keyboard, press the Reset
Key sequence defined for your terminal and reposition the cursor.
• Erase Input OPl
This function erases the characters (sets them to nulls) in all input fields and
then moves the cursor to the first input position on the screen. If the screen
contains no input fields, nothing is cleared, and the cursor moves to the upper
left corner of the screen. If the screen contains no fields at all, the entire screen
is cleared and the cursor moves to the upper left corner.
OPt
Operational Note:
The following 3270 functions cannot be used when operating as the 3708 control terminal: Erase
EOF, Erase Input, DUP, FM, PA keys, Clear, CURSR SEL, ATTN, SYS REQ and Delete.
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IBM 3708 End-User Reference