78 lines
5.2 KiB
HTML
78 lines
5.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Dot matrix" />
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<meta name="abstract" content="The dot matrix for the 5224 Printer and 5225 Printer is an 8-row-by-9-column matrix. All 8 rows and 9 columns are printed regardless of CPI or LPI settings." />
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<meta name="description" content="The dot matrix for the 5224 Printer and 5225 Printer is an 8-row-by-9-column matrix. All 8 rows and 9 columns are printed regardless of CPI or LPI settings." />
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<meta name="DC.subject" content="dot matrix, for 5224 and 5225 printers" />
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<meta name="keywords" content="dot matrix, for 5224 and 5225 printers" />
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<meta name="DC.Relation" scheme="URI" content="rzakdmstptdfnch.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Dot matrix</title>
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</head>
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<body id="dotm"><a name="dotm"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Dot matrix</h1>
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<div><p>The dot matrix for the 5224 Printer and 5225 Printer is an 8-row-by-9-column
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matrix. All 8 rows and 9 columns are printed regardless of CPI or LPI settings.</p>
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<p>The vertical distance between dots is always 0.352 mm (0.014 inch) regardless
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of the LPI setting (LPI parameter on the CRTPRTF command). The LPI setting
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determines the space between lines, not the height of characters. At a setting
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of 9 lpi (2.82 mm or 0.111 inch for each line), there is no vertical space
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between lines if all rows of dots are used. However, the normal character
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set does not use the bottom row of dots (line 8) in the matrix, so that even
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at 9 lpi there is some space between lines. If you choose, use row 8 to define
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your own characters.</p>
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<p>The horizontal distance between dots depends on the CPI setting. At 10
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CPI, each column is spaced 0.262 mm (0.0111 inches) apart, giving each character
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2.54 mm (0.1 inches). At 15 CPI, each column is spaced 0.188 mm (0.0074 inches)
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apart, giving each character 1.69 mm (0.0667 inches). The standard character
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set does not use columns 1 and 9 (to allow spacing between characters).</p>
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<p>You can use columns 1 and 9 to define your own characters with one restriction:
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the 5224 Printer and 5225 Printer cannot print two adjacent horizontal dots.
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To print two adjacent horizontal dots (such as in a solid underline), the
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line must be printed twice. This can be done using a different set of code
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points on each pass, one to define the odd dots, and the other to define the
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even dots. Both passes occur during one output operation. If your program
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attempts to print two adjacent horizontal dots, no error message appears,
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but one of the dots is not printed. (The last position of dots in one character
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and the first position in the character to its right are considered adjacent
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dots.) There is no restriction on adjacent vertical dots.</p>
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<p>On any one output operation, each code point represents a single eight-by-nine
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matrix. To print characters larger than this requires more than one eight-by-nine
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matrix, each one normally defined by a different code point. Overprinting
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is also required.</p>
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<p>For example, to print a double-wide character, specify a code point for
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the left half of the character and another code point for the right half.
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Double-high characters require a code point for the top half of the character
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and another for the bottom half. On the first line, the top half of all characters
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are printed, and on the next line, the bottom half of all characters. You
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must specify lpi(9) on the CRTPRTF, CHGPRTF, or OVRPRTF command to avoid a
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space between the top and bottom halves. Using DDS, you can define two fields
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in one record format, one for the upper half and one for the lower half. Example
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2 shows a character two wide by two high.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakdmstptdfnch.htm" title="The DFNCHR keyword allows you to define characters of your own design at the file or record level for the 5224 Printer and 5225 Printer.">DFNCHR (Define Character) keyword in printer files</a></div>
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</div>
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</div>
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</body>
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</html>
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