it returns the print head to the left margin. It does not advance
the paper (if DIP switch l-5 is on; see below).
Line feed is more complicated. Each time the printer receives
a CHR$( 10) it both advances the paper one line and returns
the print head to the left margin, ready to start a new line.
Now to add a little confusion-most (but not all) versions
of BASIC add a line feed (CHR$( 10)) to every carriage return
(CHR$( 13)) they receive. If your version of BASIC doesn’t
do this, then you should turn DIP switch l-5 off so that your
printer will add the line feed for you. When you have DIP switch
l-5 off the printer will do the same thing when it receives a
carriage return as it does when it receives a line feed.
In addition, when you are using the printer with the IBM-P
mode, you can control these functions with control codes. The
< ESC > “5” 1 command sets the printer to add a line feed
to every carriage return received. The < ESC > “5” 0 command
cancels this function.
If you tind that your printer double spaces when it should
single space, then you probably need to turn DIP switch l-5
on.
n Reverse line feeds
Your printer can move the paper up or down. The unique
tractor design allows the paper to be fed in either direction
without jamming. This allows you to move around the page
at will. You can use this feature to print several columns of
text side by side, or to print a graph and then move back up
and insert descriptive legends. As you experiment you’re bound
to come up with more uses!
The simplest form of reverse paper feeding is a reverse line
feed. The code is < ESC > < LF > , which causes the paper
to move down (in effect, moving the printing up) one line. A
“line” used in a reverse line feed is the same size as a line in
a regular line feed (this is normally l/6 inch). When you change
the line spacing (which you’ll read about next), both forward
and reverse line feeds change.
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