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Epson P-80 (0-255), CHR$(27)"K, CHR$(27)"L, Graphics Mode, Column reservation numbers, LPRINT CHR$(27)"K"CHR$(n1) CHR$(n2);

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Each time the print head makes a horizontal pass, it prints a pattern of dots. To print figures taller than 7 or 8 dots, the print head must make more than one pass. Each pass of the print head contains one piece of the total pattern, which can be as tall or short as you desire. You don’t have to use the whole page or even an entire line for your graphics figures. In fact, you can use as little or as much space as you like for a figure-and put it anywhere on the page.

Graphics Mode

The command to enter the Graphics mode is quite different from the other commands covered so far in this manual. For graphics, you must specify not only that you want to use graphics mode, but also in what density and for how many columns.

There are two graphics densities, single and double. The format for entering Single-Density Graphics mode is:

LPRINT CHR$(27)"K"CHR$(n1) CHR$(n2);

The CHR$(27)"K" specifies Single-Density Graphics, and the two numbers (n1 and n2) determine the number of columns reserved for graphics. The format is the same as above for Double-Density, except you use CHR$(27)"L".

Column reservation numbers

The graphics mode requires two numbers to specify how many columns of graphics you want because the CHR$ function in BASIC is limited to the numbers between 0 and 255. Since you can specify 480 dot positions in Single-Density and 960 in Double-Density, you need more than one CHR$ number. Therefore, the Graphics mode command is designed to use two CHR$ numbers for reserving columns, and you must supply two numbers even if you only need one.

The first number that you specify (n1) indicates a number of columns (0-255).A 255 in that position says “reserve 255 columns for graphics.” If you don’t need more than 255 columns, you use a 0 for n2.

To reserve more than 255 columns for graphics, the second number (n,) must be greater than 0. But n2 does not represent a number of single dots; it represents a number of groups, each of which contains

256dots. Using a 1 in the second slot means reserve 1 group of 256 dots plus whatever is in the first slot. For Double-Density Graphics,

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)