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The new line 50 moves the paper up 3 lines, but the printhead
doesn’t move. Therefore, line 60 prints its message starting in
the column that the printhead was left in at the end of line 30.
FORMS CONTROLS
We have seen how to control the spacing between lines on a
page. SD-lo/l5 also has commands that control the placement
of printing on the page, and even adjust for different size pages.
n Form feed
The simplest forms control code is the form feed.
Form feed
(or < FF > ) is CHR$( 12) and causes the printer to move the
paper to the top of the next sheet. Try it by changing lines 40
and 50 to this:
40 ‘Form feed.
50 LPRINT CHR$ (12) ;
Before you run the program, turn your printer off and adjust
the paper so that the top of the sheet is even with the top of the
ribbon guide on the print head, then turn the printer back on.
If you don’t remember how to do this, review Chapter 2. When
you run the program, the results will look like this:
0
- -
0
0
0
Line number- 1.
I.-i ne number 2.
0
O I
Line number 3.
, 1-i ne number 4.
0