Epson P-80 Line spacing, Graphics Programming Tips

Note: If you don’t understand how the numbers were determined, refer to Figures 6-1 and 6-2.

It takes a while for your system to compute the data so be patient. Your printout should look like this:

Run the program once more, but this time use Double-Density mode. When the program asks you for a control code, enter L. Enter the rest of the data exactly as you did with Single-Density mode. You should achieve the following result.

If your printout does not look like this one, be sure you are entering the correct values for n1 and n2. If the values are not correct, and more data is sent to the printer than it was told to expect, it will interpret values as character codes,

Graphics Programming Tips

The information in this section will provide you with a few elements to keep in mind when programming in graphics.

Line spacing

To print figures taller than 7 or 8 dots in Graphics mode, the print head must make more than one pass. If you use the default 12-dot (1/6 inch) line spacing, the print head will leave gaps between the graphics lines, just as it does between the text lines. To avoid such gaps in your patterns, adjust the line spacing to 8-dot with ESCape”A”CHR$(8) and print consecutive lines until the figure is complete.

ESCape “A”CHR$(n), where n represents n/72-inch, changes the distance that a line feed covers to n dots. The ESCape “A”CHR$(n) command sets the line spacing to n/72-inch if the n is any number from 0 through 85. If n is between 85 and 128, the line spacing is 85/72-inch.

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Contents

P-80PORTABLE PRINTER User's Manual FCC COMPLIANCE STATEMENT FOR AMERICAN USERS Copyright © 1984 by Epson America, Inc Torrance, California Contents 5 Combining Print Modes Dot-MatrixPrinting Print Pitches Pitch Mode Combinations Expandedmode Specifications of the P-80 E-1 E-1 E-2 E-2 E-3 E-3 E-3 E-4 List of Figures List of Tables 1-1 Settings for switch 1 Introduction Page Setting Up Your P-80 Page Covers use 3) l-3) Figure 1-3.Locking lever paper Paper guide Figure 1-4.Paper guide Ribbon installation Figure l-5.Lifting the front cover P-80’s 1.Make sure the printer is OFF As Figure Page That’s all there is to it. Now just close the front cover Manual-feedknob Figure 1-7. Manual-feedknob DIP Switches DIP switches 1-1 1-2 control code See Table 1-2. International character switch settings Country RS-232C Connecting the P-80to Your Computer Your Epson dealer stocks a variety of cables as well as interface boards Figure l-9.Connecting the printer cable Operation and Maintenance Switches and Indicators The control panel POWER switch off-line PAPER FEED switch Paper control switches 2-2) Figure 2-2.Paper control switches PAPER SURFACE switch — Paper-outsensor The Battery and AC Adapter Figure 2-3.Plugging in the AC adapter Battery Replacement 2-4) 2-5 Page 2-7) Figure 2-7.Replacing the battery holder cover 8.Replace the two screws at the back of the cover and replace the front cover WARNING: Do not disassemble the battery or throw it into a fire Maintenance 1.Keep your printer in a safe, clean location away from extreme tem- peratures 2.Clean particles and dust from the printer with a soft cloth or brush 3.Clean the outside of the printer with a mild cleanser when it appears dirty Installing Paper Paper sizes Paper Release Lever Paper Loading Make sure the paper is straight and placed in the printer as far as it can go Page Removing the paper The P-80 Self-Test Control Codes Table 4-1. The P-80and ASCII Codes P-80 Interpretation Using Control Codes CHR$(27)CHR$(52) A BASIC example 10 LPRINT CHR$(27);"-1"; 20 LPRINT "Underline Underline 30 LPRINT NEW 10 FOR X=1 TO 41: LPRINT CHR$(95);: NEXT X 20 LPRINT CHR$(13); 30 LPRINT "THIS PROGRAM USES THE UNDERLINE CHARACTER THIS PROGRAM USES THE UNDERLINE CHARACTER Combining Print Modes Figure 5-1.Main columns and intermediate positions Figure 5-2. Overlapping dots Print Pitches P-80 Pitch Mode Combinations Expanded mode Print Quality Modes when Figure 5-5.Print quality differences Dress-upModes Mode Conflicts and Priorities Table 5-1.Summary of modes Mixing Modes Summary Notes 1. Pica is the default pitch and is active when Compressed is turned 3.Double-Strikeand Emphasized produce the same result When Normal Under Print line Graphics NEXT X: LPRINT 40 IF R=0 THEN LPRINT: LPRINT CHR$(27)"@": END 60 N=-R:READ R: FOR K=1 TO N: LPRINT CHR$(R); DATA Print Head that Graphics Mode LPRINT CHR$(27)"K"CHR$(n1) CHR$(n2); CHR$(27)"K CHR$(27)"L Column reservation numbers LPRINT CHR$(27)"L"CHR$(N MOD 256)CHR$(INT(N/256)); Labelling Elements Figure 6-1. Labelling elements Figure 6-2.Element combinations FOR RETURN Figure 6-3.Data for space invader Graphics Programming Tips Line spacing WIDTH statements WIDTH LPRINT Semicolons and command placement 20 LPRINT CHR$(27)"K"CHR$(50)CHR$(0) 30 LPRINT CHR$(27)"0 Figure 6-4.Result of incorrect program Use semicolons to prevent the Page ASCII Codes and Character Sets A-1 <DC4 Control-T Control-) A-2 Page Page Appendix B Control Code Summary LPRINT CHR$(27)CHR$(69) or LPRINT CHR$(27)"E Page lines inches B-3 B-4 Appendix C Mode and Character-SetSelection Line Spacing Forms Control CHR$(12) c-2 Using Your P-80 with the Geneva™ PX-8™ Connecting the Geneva to the P-80 P-80 D-2 Page Specifications of the P-80 Table E-1 Characters Paper Paper types Single-sheetor roll paper, up to 8.5 inches wide Interface Specifications Interface Connector Page Index 42-43 47 B-4 C-2 C-l 45 B-l 10-11 A-l A-3 16 17 D-l-D-2 37-38 33 7-9 Index-6 Page Page Page EPSON AMERICA, INC LIMITED WARRANTY (213)