Epson FX-80 Specifications download pdf (Page 116)

One-time, immediate line feed

The FX has a special line feed that executes a new size of line feed

once, then reverts back to the size of the previous line feed. And that’s

not all-it is executed immediately rather than at the end of the print

line as all the other line spacing commands are. The format is:

LPRINT CHR$(27)"J"CHR$(n)

where n represents a distance of from zero to 255/216-inch.

Put this one to the same test you gave the ESCape “A” command

with the following program:

20 FOR X=10 TO 30

30 LPRINT TAB(X)"STAIR"CHR$(27)"J"CHR$(X)"STEPS"

40 NEXT X

50 LPRINT CHR$( 27)“2”

Compare Figure 7-3 to Figure 7-2. In the ESCape “A” program of

Figure 7-2, the FX prints STAIR and STEPS on the same line, and

performs the variable line feed at the end of the line. In the ESCape “J”

program of Figure 7-3, the FX first performs a line feed without a

carriage return between the strings (see how STEPS begins to sag

below STAIR?), and then a standard 12-dot line feed plus carriage

return at the end of each line.

To summarize, the ESCape “J” does not require a shut-off code as

the other line-feed control codes do: the FX executes it once, then

forgets it. Another difference between this line-spacing command and

the others is that this one does its work without performing a carriage

return: the print head does not move to the left margin.

Reverse feed (FX-80 only)

The FX-80 has another one-time, immediate line feed, the reverse

feed. It operates the same way that ESCape “J” does, as its code sug-

gests: ESCape “j”. The only difference is that reverse feed moves the

print head back up the paper (it actually moves the paper, but the

effect is of the print head moving). The following program lets you

watch ESCape “j” in action. When you RUN it, the FX-80 will first

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Epson FX-80 Specifications Page 116