Epson LX-80 User Manual - Page 84

Line 20 begins a loop to produce multiple print lines. Lines 30 and 40 were covered above, but an LPRINT is added to line 50 to produce a line feed after line 40. Lines 60 and 70 are like lines 30 and 40 except that line 70 uses a reversal of the patterns in line 40. As the loop is executed, the program prints lines 40 and 70 alternately so that the patterns of the print lines will fit together well. Notice that the graphics command can be in effect for only one print line. The command is in lines 30 and 60 so that it is issued each time a new print line is begun. You cannot print more than one line of graphics without having the graphics command issued more than once. Line 90 is the reset code to return the printer to its defaults. Density Varieties Although all the examples so far in this chapter have been in the single-density graphics mode, the LX-80 offers five other eight-pin density modes and two nine-pin ones. Nine-pin graphics is not necessary for most uses, but you can find its command (Escape " * ") in Appendix B. All the eight-pin densities and their commands are described in Table 9-1. Table 9-l. Graphics modes Mode 0 1 2 3 4 5 6 Density Alternate code Description Single ESC "K" /go;bSepeed ESC "L" High-Speed ESC "Y" Double Quadruple ESC "Z" Epson ox-1 OTM none One-to-one none (plotter) 90 dots/inch none 60 dots/inch: 480 dots/8" line 120 dots/inch 960 dots/8 line 120 dot positions/inch Faster than Mode 1; does not print consecutive dots in a row. 240 dot positions/inch; 1920 dot positionsW line. Does not print consecutive dots in a row. 80 dots/inch; 640 dots/W line Matches the screen density of the QX-10, which makes it easy to do screen dumps. I72 dots/inch: 1576 dotsB" line Produces the same density horizontallv as verticallv. which makes circles look round. 90 dots/inch; 720 dots/W line 80