IBM 3742 Reference Manual page 30

NEW LINE: Use this key to skip to a new line on the
printer.
NUM SHIFT: Use this key to override programmed alpha
shift or to override the PROG NUM SH I FT switch when in
the NUMBE RS ON L Y position. Simultaneously hold
down NUM SHIFT and the desired character key.
PRINT REG: Use this key to print the record currently
being displayed. After the printing is complete, the 3741
returns to the mode of operation being used before
pressing PRINT REC.
PRINT TO EOD: Use this key to print an entire data set
or to print from the current disk position to EOD. If the
3741 is in the read index mode, the entire data set is
printed. This key is invalid in the verify mode. Pressing
this key in the enter mode changes the mode to read index
and displays the data set label of the current data set being
entered.
PROG LOAD: Use this key to store new programs and to
store auxiliary duplication data for program level 4. Press
FUNCT SEL lower, PROG LOAD, and then a number
corresponding to a program key.
REG ADV: Use this key to move to the next sequential
record.
REG BKSP: Use this key to move the cursor back to the
first manual position of the current record. If the cursor is
already in the first manual position of the current record,
the cursor moves back to the first manual field of the pre-
vious record. The previous record buffer is made equal to
the current record buffer. Pressing REC BKSP in enter
mode changes the mode to update mode.
Pressing R EC BKSP from the beginning-of-extent address
results in no action. Record backspacing in the field
correct mode causes an L error. Record backspacing in the
search mode is limited to the current record.
24
RESET: Use this key to reactivate the keyboard when
keyboard lockout (the keyboard is made inoperative) occurs.
To correct disk errors, hold down NUM SH I FT and press
RESET. Use RESET in any mode of operation to cancel
the following:
1.
A search content or search sequential content function
while the search is taking place.
2. A pending program selection or program load operation.
3.
A modify index function.
4.
A hex ~eying sequence.
5. Functional error.
6.
Function select.
RETURN TO INDEX: Use this key to change to read
index mode. Pressing RETURN TO INDEX causes the
following actions:
1. Returns to current data set label.
2.
3.
4.
5.
Displays the current data set label.
Makes the contents of the previous record buffer
equal to the contents of the current record buffer.
Updates the end-of-data address field in the data set
label if a record has been entered.
I nserts a blank in the verify mark field if a record
has been written in enter mode or changed in update
mode.
6. Selects program level O.
The EOD field in the data set label is not updated if the
end-of-data address is equal to the beginning-of-extent
address when RETURN TO INDEX is pressed. This protec-
tion is needed in case enter mode is selected by accident.
If this happens, press RETURN TO INDEX. This protects
the EOD field in the data set label until the first record has
been released in the enter mode. When the end-of-data
processing is completed, a beep occurs to indicate the
completion of the function.