Справочник Пользователя для Epson LX-80

Now that we’ve shown you how to design your own graphics,

we’ll review and emphasize a few elements of graphics programming.
As usual, we use MBASIC in the examples, but the principles apply

to any programming language.

After the graphics command is issued, every number sent to the

LX-80 is interpreted as a pin pattern and printed on paper. Therefore,
you must be careful where you put graphics commands in your

program.

For example, suppose you want a 50-column graphics line with the

line spacing set to 7-dot. You might enter the following program:

       

This program has all the necessary elements. Line 20 has the com-

mand for single-density graphics and specifies 50 columns. (Remem-

ber that you must use two numbers to reserve columns even if you

only need the first one.) Line 30 has the correct command for 7-dot

line spacing, and line 40 calls for the printing of a pin pattern 50 times.

(If you wish, refer back to Figure 

9-2 to see a representation of the pin

pattern that 74 produces.)

Although this program has all the necessary elements, it will not

give you the single pin pattern that you want, as you can see in the
partial printout in Figure 

9-6.

Expected pattern

Actual result

86