Star Micronics XB24-10, XB24-15 user manual How the program works

4420 DATA 192,224,224,224,224,240,255,255,255,255

4430 DATA 255,127, 0, 0, 0, 0, 0, 0, 0,192 4440 DATA 255,255,255,255,255,15, 15, 63,252,240

4450 DATA 192, 0,240,255,255,255,255,255,7, 15

4460 DATA 127,252,240,192, 0, 0, 0, 0, 0, 0

4470 DATA 0, 0, 0, 0, 0

4480 ' ROW 4

4490 DATA 0,248,248,240,224,224,112,112,56, 56

4500 DATA 56, 56, 56,120,120,240,240,224,224,lV2 4510 DATA 128, 0, 0, 0, 0, 0, 0, 0, 0, 0 4520 DATA 128,248,248,248,248,240,192,0, 0, 0 4530 DATA 0, 0,240,248,248,248,248,240,192,0 4540 DATA 0, 0, 0, 0, 0, 0, 0, 0, o, o 4550 DATA 0, 0, 0, 0, 0

This will produce the following results as shown on page 102.

How the program works

This program begins by assigning a number of printer commands to BASIC string variables (lines loo0 to 1070). You can find most of these commands near the beginning of chapter 4.

The WIDTH “LPTI:” 255 statement in line 1090 means infinite line width. It prevents the IBM-PC from inserting unwanted carriage returns and line feeds in graphics data.

Actual printing begins in line 1100. Using the preassigned commands, the program prints samples of its different font styles, followed by samples of the print pitches, then some double and quadruple-sized printing.

Next comes the central attractionof the program: aline of text printed twelve times in expanding and contracting loops to give a barrel effect. The work is done by four printer commands: a command setting the right margin (line 1570); a centering command (line 1590); a command to vary the line spacing (lines 1610 and 1660); and a command to micro-adjust the space between characters (lines 1620 and 1670).

Next the program n%uns to normal spacing and gives a demonstration of the printer’s word-processing abilities: outlined printing, bold printing, under- lining, subscripts, etc.

100