Epson LX-90TM Manuale Utente

Some software (including IBM Personal Computer BASIC) auto-

matically inserts the control codes for a carriage return and a line feed

after every 80 - 

130 

characters. This insertion is usually no problem

with text, but it can spoil your graphics. In the graphics mode it may

insert the control codes in the middle of a line.

You can usually prevent these unwanted control codes with a

WIDTH statement. One format is shown below. Consult your soft-

ware manual to find the proper format for your system.

WIDTH LPRINT 255

Put a WIDTH statement in one of the first lines of all your graphics

programs. It is easier to put a WIDTH statement in all of your pro-

grams than to examine each one to see whether or not such a state-

ment is necessary.

Now that you’ve entered and run a simple graphics program, you

can go on to an exercise that shows you how the LX-90 combines

several lines of graphics for a figure taller than eight dots.

Start with a line for 

100 

columns of single-density graphics and lines

to print two pin patterns. Notice that since there are two pin patterns

in the loop, it is only executed 50 times.

NEW

10 WIDTH LPRINT 255

40 

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

50 FOR X=1 TO 50: LPRINT CHR$(85)CHR$(42);

60 NEXT X: LPRINT

100 LPRINT CHR$(27)"@"

If you run the program now, you’ll see how one line of the pattern

looks:

To see how more than one line combines to form a figure, enter and

run the following program, which uses the lines you have already

typed and adds several more.

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