Epson FX Benutzerhandbuch

In the programs that follow (except the first), we shorten the process

of specifying pins by using the fact that their labels represent powers

of two. (Refer back to Figure 10-3 to refresh your memory about the

relationship of ordinal numbers to powers of two and the exponential

labels for the pins.) We use the caret (^) to represent exponentiation;

for example, 2^6 means raise two to the sixth power. Some computer

systems use, instead of a caret, an up-arrow (t ), which prints as a left

bracket ([) on the FX.

Your first testing of the FX’s graphics potential will consist of firing

the bottom graphics pin. Enter and RUN this program (be careful to

include the semicolons):

NEW

10 LPRINT CHR$(27)"K"CHR$(100)CHR$(0);

20 FOR X=1 TO 100

30

LPRINT CHR$(l);

40, 

NEXT X

50 LPRINT

If your system won’t send CHR$(0), use CHR$(8).

This program deserves a full discussion:

Line 10 prepares the printer to accept 

100 

columns of graphics data.

Line 20 starts a loop for the LPRINT statement. Note that the loop

must match the number of columns specified in line 

10. 

The printer is

expecting 

100 

bytes of data; it interprets everything it receives as

graphics data until this quota is filled.

Line 30 sends a one to fire the bottom graphics pin. The semicolon at

the end of the line is necessary to suppress the carriage return and line

feed (ASCII 

13 

and 

10), 

because otherwise they are sent automatically

at the end of each LPRINT line. Without that semicolon, the printer

would receive the sequence 

1,13,10,1,13,10 

. . . instead of 

l,l,l,l.

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