User`s manual

Many of the codes that control the GQ-3500’s features are not
letters, numbers, or punctuation. These codes are control codes, which
are most easily accessed with BASIC’s CHR$ function. CHR!$ followed
by a number sends the ASCII character that number represents. For
example, to send the FF (form feed) code, which is ASCII 12, the
command is:
LPRINT CHR$(12)
After the LPRINT command sends the information to the printer, it
sends two more codes: a CR (carriage return) and LF (line feed). This
causes the next LPRINT command to begin printing at the left margin of
the next line down the page. In some cases, you will not want the
LPRINT command to send these two codes. You can prevent it from
doing so by ending the command with a semicolon, like this:
LPRINT "Don't send CR/LF";
Because the GQ-3500 prints one page at a time instead of one line
at a time, no printing takes place until a form feed (FP) command or a
full page of data is received.
Orientation
Before you start printing, decide which direction you want the
printing to go. In portrait orientation, the lines of text are printed
perpendicular to the direction of the paper moving through the printer.
This is the most common orientation and is the one used for the pages of
this manual.
-
In landscape orientation, the lines of text are printed parallel to
the direction of the paper moving through the printer. This gives you a
page that is wider than it is high.
You cannot combine portrait- and landscape-oriented text on the
same page. As soon as you send the orientation command, the sheet
currently being printed is ejected and a new sheet is started with the
new orientation.
6-2
Software Control of Printer Features