Star Micronics NP-IO manual Try setting the margins with this program

48

SETTING LEFT AND RIGHT MARGINS

The left and right margins of this printer work just like a typewriter - once they are set all printing is done between them. You can set margins by escape commands. The com- mands to set the margins are given in the following table:

Table 4-6

Left and right margin commands

Try setting the margins with this program:

10' Demo of margins

20 GOSUB 70

30 LPRINT CHR$(27);"1";CHR$(lO);

40 LPRINT CHR$(27);"Q";CHR$(70);

50 GOSUB 70

60 END

70FOR I=1 TO 80

80 LPRINT "X";

90 NEXT I

100LPRINT

110RETURN

The first thing that this program does is to branch to the subroutine that starts in line 70. This subroutine prints 80 X’s in a row. The first time that the subroutine is used, all the X’s fit in one line. Then line 30 sets the left margin to 10, and line 40 sets the right margin to 70. Once again the subroutine is used, but this time the X’s won’t all fit on one line since there is now only room for 60 characters between the margins.

Run the program. The results will look like this:

XXXXXXXXXxkXXXXxXXxXxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxkkkk~xkxxxxxxxxxxkxxxxx

XkXXXXXxXXXXXXXXXXXXxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxkxxxxxxx

xxxxxxxxxxxxxxxxxxxx