Intermec 6822 6820 Series 80-Column Printer User Manual (for printers purchase - Page 88
Select Low-Speed Quadruple Density Graphics Mode, Nine-Pin Graphics Modes
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Chapter 4 - Control Code Definitions The resolution is still 120 dots per inch. Each 8-in line can accommodate 960 columns of graphic dots. A graphic string that exceeds the length of the print line is discarded. Make sure adjacent dots in a given dot row are not printed. Select Low-Speed Quadruple Density Graphics Mode With this 8-pin graphics mode, the number of dots per inch has gone up to 4x what it was in single density. Calculating the parameters, n1 and n2, is described below. Format Decimal 27 90 n1 n2 Hex 1B 5A n1 n2 ASCII ESC "Z" n1 n2 The resolution is now 240 dots per inch. Each 8-in line can accommodate 1920 columns of graphic dots. A graphic string that exceeds the length of the print line is discarded. Make sure adjacent dots in a given dot row are not printed. Nine-Pin Graphics Modes These 9-pin graphics functions also require two parameters, n1 and n2. They are calculated slightly different than in the 8-pin graphics modes. Since two data bytes represent each dot column to print, first divide the total length of the graphic string (following the Select Graphics Mode command) by two. These parameters are calculated as follows (assuming a temporary variable n): • n = total number of dots needed, divided by 2 • n2 = integer of (n divided by 256) • n1 = remainder of the n2 calculation First, divide n (the total number of dots needed for the graphics string) by 2, then divide the result by 256. Then n2 is the quotient (the whole number) and n1 is the remainder. If you require less than 256 dots (columns), then n1 indicates the number of dots and n2 is set to zero. 72 6820 Series 80-Column Printer User Manual