Gemini Industries Printer user manual Putting Gemini to Work

Putting Gemini to Work

italic type, respectively, in Figure 5-2. You might note that the decorative graphic characters are unaffected by the italic control, and the italic mode is resumed after 6 x 6 characters are printed.

Line 140 is similar to line 120, and serves as one way of drawing a line across a page.

Line 150 sets three character strings in preparation for the printing that follows. The first string, “ABC:’is printed in normal script. The next string, “Xx”, is printed in superscript. The third string, “Yy:’is printed in subscript. If you prefer other characters (for example, your name) to be printed in another version of Figure 5-2, change these strings and rerun the program.

Line 160 starts the loop-over printing modes. Line 170 puts the printer into italic type when I = 2. This is required because we will use the printer-reset to clear the print modes at the end of this loop. The printer-reset causes Gemini to go back to its initial power “on” state.

Lines 180 through 210 print row headings for the tables, on the left side of the lines illustrating the print modes in Figure 5-2. For J = I, the print mode is normal. J = 2 produces the double- strike effect. The print is emphasized as a result of J = 3. With J

=4, Gemini produces a combination of double-strike plus emphasized type. You might also note that we set the row headings in compressed type to conserve space so that the tables would fit on lO-inch-wide paper.

Line 220 starts the inner loop, which prints each line of the table. Lines 230 through 280 set the six different print sizes. If K = I, line 230 sends the COMP$ command to Gemini, which causes a shift into the compressed print mode. If K = 2, then line 240 sends the ELITE$ command to the printer. If K = 3, line 250 sends the PICA$ command, thus directing Gemini to print in normal (IO CPI) type size. The question might arise: Could we use the PRSET$mode instead? If we did, it would be necessary to reset the italic mode before printing the table characters when I = 2. When K = 4, line 260 sends both the COMP$ and the WIDE!§ commands, causing the printer to shift into 8.5 CPI.

Lines 270 and 280 cause Gemini to print 6 CPI when K = 5, and 5 CPI when K = 6.

Line 290 invokes the double-strike mode when J = 2 by sending the character string DBL$ to Gemini. You may recall the DBL$ is equal to ESC$ + “G”or, equivalently, CHR$(27);CHRS(71).

Line 300 sends the emphasized mode command to the printer

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