3.6.1 Drawing and Selecting Character Sets
The drawing of characters is done with the LB command. When the LB command is
transmitted, the plotter enters labelling made and draws the string of characters that follow
the LB command. For example, if
LPRINT "LBABCDabcd" ;CHR$(3)
is sent, the plotter will draw "ABCDabcd" from the current pen location. [ETX] CHR$(3) in
the above statement is a label terminator which is appended to the character string to
release the plotter from labelling mode. If the label terminator is omitted, the next command
sent will be interpreted as a string of characters. The label terminator can be changed with
the DT command.
3.6 Labelling Commands
The character set to be used by the LB command is specified by the CS, SS, CA and SA
commands, which are listed in Appendix C “ Character Set Table” .
The character codes for the characters that can be drawn are CHR$(33) to CHR$( 126).
Among the control characters that cannot be drawn, from CHR$(0) to CHR$(32), the follow
ing characters have special functions in labelling. The other control characters will be ig
nored.
[ETX]CHR$(3):
[BS]CHR$(8):
[ HT]CHR$(9):
[LF]CHR$(10):
[VT]CHR$( 11):
[CR]CHR$(13):
[SO]CHR$(14):
[SI]CHR$( 15):
Terminates labelling mode
Moves left one space
Moves left half a space
Feeds one line down
Feeds one line up
Moves to head of line (carriage return)
Selects alternate character set
Selects standard character set
Various settings can be selected for the characters that are to be drawn. These include the
size of character (SI, SR), the drawing direction (DI, DR) and the character slant (SL) among
others.
Command for specifying absolule character size
Command for specifying relative character size
Command for specifying absolute character drawing direction
Command for specifying relative character drawing direction
Command for specifying character slant
Command for defining user characters
Command for specifying symbol mode
Command for defining label terminators
Command for controlling character position
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