User's Manual

Control Code Definitions

Chapter

—

6820 Series 80-Column Printer User’s Manual

Graphics Modes

Mode m Dots per Inch / Dots per 8” Line

Single-density 0 60 dots per inch, 480 dots per 8 inch line

Low Speed Double-density 1 120 dots per inch, 960 dots per 8” line

High Speed Double-density see note 2 120 dots per inch, 920 dots per 8” line

Low-Speed Quadruple-density see note 3 240 dots per inch, 1920 dots per 8” line

CRT I 4 60 dots per inch, 480 dots per 8” line

Single-Density Plotter 5 72 dots per inch, 576 dots per 8” line

CRT II 6 90 dots per inch, 720 dots per 8” line

Double-Density Plotter see note 7 144 dots per inch, 1152 dots per 8” line

Note: Adjacent dots, in a given row, cannot be printed in these modes.

Select Single Density Graphics Mode

This is a simple method of printing graphics. The resolution is 60 dots per

inch. Each 8 -inch line can accommodate 480 columns of graphic dots. A

graphic string that exceeds the length of the print line is discarded. Calcu-

lating the parameters, n1 and n2, is described on page 89.

Format

Decimal Hex ASCII

27 75 n1 n2 1B 4B n1 n2 ESC “K” n1 n2

Select Low-Speed Double Density Graphics Mode

If Single Density graphics does not produce high enough density, try this

mode. The number of dots per inch is doubled. However, the speed is re-

duced to half of what it would be with single density. Calculating the pa-

rameters, n1 and n2 , is d escribed on page 89.

This is 8-pin single density graphics. The resolution is now 120 dots per

inch. Each 8 -inch line can accommodate 960 columns of graphic dots. A

graphic string that exceeds the length of the print line is discarded.

Format

Decimal Hex ASCII

27 76 n1 n2 1B 4C n1 n2 ESC “L” n1 n2