{A}; is the single-character attribute flag identifying whether the character contains descenders (a portion of the character descends below the botF tom of the print line) or extenders (2 dot rows near the bottom of the character are repeated until what would be the next line boundary at 6 lpi). Extenders are used for graphics characters. 0 = no attributes; 2 = descenders; and 6 = extended characters. The semicolon (;) is the hexaF decimal data terminator.

{data} are the data values for each dot column of the character cell. The Least Significant Bit is the bottom-most dot of the character. The size of the character cell is determined by the selected print mode and pitch {PP} and the attributes {A} applied to it. If there is not enough data to define each dot column in the character cell, any subsequent bytes will be used to complete the dot column data; if more data is sent than expected, the exF cess data will be treated as printable data. The character size is deterF mined using the data in Table E-2. The semicolon (;) is the hexadecimal data terminator and must follow each dot column entry.

Depending on the memory requirements for each character, six or more characters can be created. When memory to store downloaded characters has been exhausted, the printer will beep and display DOWNLOAD CHAR. MEMORY FULL for one second; characters downF loaded after this point will not be saved. Downloaded characters can be saved into printer powF erup configuration when the configuration is saved. User-defined characters have priority over standard Printronix characters.

The largest permitted symbol point is 65,535 decimal; values greater than 65,535 are invalid. Non-numeric characters in a numeric data field will also render the character invalid. If the defined character format is invalid, all downloaded characters in working memory are cleared. (Characters saved in nonvolatile memory are not affected.)

The Extend attribute causes the character to be extended to what would be the next line boundF ary at 6 LPI. This attribute is useful for graphics characters that need to be connected with graphics characters on the next line. The Extend attribute is achieved by repeating the lowest- most two dot rows. Characters with the Extend attribute are assumed to be characters with desF cenders. Table E-1 below shows by print mode the number of dot rows and the number of times the dot rows are repeated when the Extend attribute is used.

Table E-1. Extended Character Attributes

Print Mode

# of Dot Rows

# of Times Repeated

DP

2

1.5

NLQ

2

2

HS

2

1

HSB

2

2.5

HSC

2

2

OCR-A

N/A

N/A

OCR-B

N/A

N/A

 

 

 

E-2

Appendix

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Image 314
Printronix P9000 Series manual Nlq Hsb Hsc Ocr-A Ocr-B