Epson FX-100 User Manual download pdf (Page 114)

The ESCape”A”CHR$(n) command sets the line spacing to n/72-

)

inch if the n is any number from 0 through 85. If n is between 85 and

128, the line spacing is 85/72-inch. At 128 the sequence starts again,

with 128 giving the same result as 0, 129 the same as 1, and so on.

Therefore, the X+128 in line 30 produces a change in line spacing

from 0 to 24/72-inch.

In summary, ESCape “A”CHR$(n) selects line spacing in 72nds of a

inch, where:

n= 0-

line

spacing

0 - 85/72-inch

85 - 127

85/72-inch

128 -

213 0 - 85/72-inch

214 -

255

85 /72-inch

Since the ESCape “A” sequence lets you specify any 72nd of an inch

(from 0 - 85) and since each dot of a dot matrix fills 1/72-inch, you can

use this command instead of the preset commands that we covered

above. You can set 12-dot line spacing either by specifying 12 to the

“A” sequence or by using the preset command:

CHR$(27)“A”CHR$(12) or CHR$(27)“2”

Notice the position of the ESCape “A” sequence in line 30-right

between the strings STAIR and STEPS. We placed it there to demon-

strate that the FX doesn’t execute the line-feed command until the end

of the print line. Otherwise it would print the two strings on different

lines.

Also notice that the lowest valid line spacing is zero dots. You can

use this when you want to make multiple overstrikes on one line. To

see an example, make these changes to your program:

FOR X=0 TO 4

30 LPRINT TAB(6*X)"STAIR"CHR$(27)"A"CHR$(0)

STEPS"

The reason for emphasizing 72nds of an inch is that the distance

between the centers of any two pins on the print head is 1/72-inch. So

these line spacing commands are simply telling the printer just how

many dots to space between the lines.

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 267 268

No comments

Epson FX-100 User Manual Page 114