Define Lf Code; Printer Select; Alternate Select 80-9F - IBM 6400 Setup Manual

Define LF Code

The DEFINE LF CODE (Define Line Feed Code) option determines whether
an automatic carriage return should occur whenever a line feed command is
received.
LF = LF (the default) does not perform an automatic carriage return. The
next print position will be the current print position of the next line.
LF = CR + LF forces an automatic carriage return with each line feed
command. The next print position will be position 1 of the next line.

Printer Select

The PRINTER SELECT option determines if the ASCII DC1 and DC3
control codes can be used to disable and enable the printer.
DISABLE (the default) ignores the DC1 and DC3 control codes.
ENABLE disables the printer when a DC1 control code is received, and
enables the printer when a DC3 control code is received.
Alternate Set 80–9F
This option determines if data in the range of hex 80 through hex 9F should
be interpreted as a control code or as a printable character.
CONTROL CODE (the default) interprets data in the range of hex 80
through hex 9F as a control code.
PRINTABLE prints data in the range of hex 80 through hex 9F.
Chapter 4. Configuration Menus 4–81