Printronix MVP Series - Manual (Page 165)

Programming 7–41
Underline — Methods 1 & 2
The printer will automatically generate the underline as required by the
particular character line transmitted. Leading and trailing spaces are not
underlined. Use the following guidelines and see Figure 7–6:
• Underlines start and stop on the normal character boundary and are
permissible at 6 or 8 lpi.
• The ESC sequences can be repeated multiple times within a line and
can, by themselves, constitute a printable line comprised of only
underlines (assuming configuration 28.1 is set).
• Spaces will be underlined as normal printable character, if they are
preceded by an ESC – 1 sequence. Any incorrect sequence will be
ignored.
• The Underline mode set by ESC – n is not cleared by performing a print
or paper movement, but stays in effect until the ESC–0 sequence is
received or the printer is powered off.
Method 1 (On/Off)
On
Underlines are turned on by the control sequence ESC – 1 (or hex string 1B,
2D, 01) where the character 1 in the ESC sequence is the second character
(SOH) in the ASCII character chart (see Appendix A).
NOTE: Hex 31 can replace hex 01.
Off
Underlines are turned off by the control sequence ESC – 0 (or hex string 1B,
2D, 00) where the character 0 in the ESC sequence is the first character
(NUL) in the ASCII character chart (see Appendix A).
NOTE: Hex 30 can replace hex 01.