HP 1200 HP PCL/PJL reference - PCL 5 Comparison Guide - Page 85

ENWW Segment Identifier Values The Segment Identifier Values for the Galley Character, Vertical Substitution Character, Typeface String, Vertical Rotation, and Character Enhancement Segments are as shown in the following table. Value Mnemonic* Data Segment 18243 GC Galley Character Segment 22100 VT Vertical Substitute Segment 21574 TF Typeface String Segment 22098 VR Vertical Rotation Segment 17221 CE Character Enhancement Segment * The mnemonic is obtained when the two bytes of this big-endian word are treated as ASCII characters. Data Segment Size The Data Segment Size indicates the number of bytes in the immediately following Data Segment. The size of this field is 4 bytes for Font Format 16 fonts, and 2 bytes for Font Format 15 fonts. The rest of the data segments are identical for both font formats. Galley Character Segment If an application requests a character that does not exist within the current font, the printer checks the Galley Character Segment for a substitute character to print instead. The Galley Character Segment specifies the character codes of the substitute characters to be printed. A different galley character can be specified for different regions of the symbol set. For example, this segment can be set up so that an asterisk prints when a non-existent character is selected in the region 0x81 - 0x9F, and a question mark for characters in the region 0xE0-0xFC. Byte 0 2 4 6 8 15 (MSB) 8 7 GC (18243) Data Segment Size (6*n+6) * Format = 0 Default Galley Character (LSB) 0 Byte 1 3 5 7 9 Printer-Specific Differences 2-37