Unidirectional Mode - Epson FX Series User Manual

The 17 backspaces (line
difference in character widths makes the second printing of the word
BACKSPACES be offset from the first.
In the next program, the offset is a little more dramatic. Change the
following lines:
30 LPRINT "BACKSPACE"CHR$(l5);
40 FOR X=1 TO 15: LPRINT CHR$(8);: NEXT X
50 LPRINT CHR$(18)"BACKSPACE"
After the FX prints each BACKSPACE, it moves the print head
Compressed positions backward. Instead of bold characters, you get a
shadow effect. You could spend all day mixing pitch modes to get
different eye-stretching effects.

Unidirectional Mode

The FX printers provide high quality printouts in their normal
bidirectional print mode. However, there may be situations in which
vertical columns printed in Elite or Compressed Mode get slightly mis-
aligned. The printer has a Unidirectional Mode to prevent such prob-
lems .
To see how effective Unidirectional Mode can be, let's create a long
vertical line. First we'll print it in the usual, bidirectional manner.
Begin by typing:
20 LPRINT CHR$(27)"l"CHR$(27)"1"CHR$(40)
40 FOR X=1 TO 10: LPRINT CHR$(124): NEXT X
50 LPRINT CHR$(27)"@"
Line sets the line spacing to seven dots and the left margin to
20
create the vertical line, line
ASCII
124) 10
defaults.
are printed in Compressed Mode. The
40)
40
times (on print lines). Line
10
prints one character (represented by
50
40.
resets the printer to its
15
To
83