Genicom GEK 00031B - Manual (Page 68)

Chapter 3. Printronix P300/P600 Emulation GEK-00029B 68
SI Shift In (0FH): An SI code anywhere in the line causes the remainder
of the line and all following lines to be printed in the standard font.
SO Shift Out (0EH). An SO code anywhere in the line causes the
remainder of the line of the line and all subsequent lines (until an SI
code is received) to be printed in the alternate font. The alternate font
is selected with printer P300/600 emulation straps S13-S16, set in
the GenPtrOpts function of the CCU menu.
SP Space (20H): The space code causes a blank in the character
position represented by the code. Following a carriage return in edit
mode, space codes do not modify the contents of the print buffer. The
SP is used as a skip code to pass over characters in the buffer. When
using the character graphics font the character in the 20H position is
printed instead of a blank.
UNDL Underline (5FH): When using the legacy parallel interface, hardware
strap H7 IN causes a CR to be substituted for an underline character.
(See Appendix G. Hardware Straps.) All software straps that apply to
a CR will apply if the option is selected.
US Unit Separator (1FH): The US character is used to signal the end of
an EVFU load sequence.
VT Vertical Tab (0BH): A VT causes the line to be printed and paper
advanced until the next tab position is reached. If the VFU is
enabled, channel 12 is accessed instead.