User manual OKI D512 ACCESSORY INSTRUCTION GUIDE

[. . . ] D512 PCL PROGRAMMING MANUAL PN: 9001180B SATO America, Inc. 10350A Nations Ford Road Charlotte, NC 28273 Main Phone: (704) 644. 1650 Technical Support: (704) 644. 1660 Technical Support Fax: (704) 644. 1661 E-Mail: satosales@satoamerica. com techsupport@satoamerica. com www. satoamerica. com Copyright 2008 SATO America, Inc. All rights reserved WARNING THE EQUIPMENT REFERENCED IN THIS DOCUMENT COMPLIES WITH THE REQUIREMENTS IN PART 15 OF FCC RULES FOR A CLASS B COMPUTING DEVICE. OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA MAY CAUSE UNACCEPTABLE INTERFERENCE TO RADIO AND TV RECEPTION. Table of Contents PCL Emulation PCL Emulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Selecting PCL Emulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] An encoder determines how to break the data into blocks and finds the best compression method to use for each block. An encoder works based on the following principles. The encoder creates a dictionary containing different characters in a set of data. Short strings of bits represent more commonly occurring characters, and long strings of bits represent less frequently used characters. A probability tree determines which characters are frequently used. Repeated patterns in a string of characters are identified and stored, so the string doesn't have to be stored multiple times. A three-bit zlib header is added to the beginning of a block to describe the type of compression used and indicates whether the block is a final block. Other information in the header includes checksums, compression algorithm used, and the level of compression. In compression all checksums are set to zero and in decompression the checksums are ignored. The memory required for zlib compression and decompression is independent of the size of the data to be compressed or decompressed. The number 999 does not conflict with other compression types, so it is used to represent zlib compression. See "Raster Compression Mode" in this section for more information. Page 1-36 SATO D512 PCL Programming Manual Unit 1: PCL Emulation GROUP 3 AND GROUP 4 RASTER COMPRESSION Since Group 4 images do not use line endings, the width of the image must be specified using the Raster Width command (ESC*r#S). The compressed image data is sent to the printer using the Transfer Raster Data command (ESC*b#W). The maximum number of bytes that can be sent using the Transfer Raster Data command is 32K bytes. Images larger than 32K bytes must be broken up and sent using multiple commands. It does not matter where the image is broken, or how many Transfer Raster Data commands are used. Once the image is started (with a Transfer Raster Data command), no other commands are allowed until the entire image has been sent. The following example prints a Group 4 image file that is 256 bits wide and 9, 645 bytes long: ESC*b1002M ESC*r256S ESC*r1A ESC*b9645W |Set Raster Compression to Group 4 |Define width of image in input bits |Start Raster Graphics at current position |9, 645 bytes of a Group 4 image |End Raster Graphics . . . [Group 4 image data]. . . ESC*rB All lines of data must be the same length. If they are not, zeroes (0) must be added to attain the same length. Note: If the uncompressed image extends beyond the logical page dimensions or beyond the raster width specified in the Raster Width command (ESC*r#S), the image is clipped at print time. SATO D512 PCL Programming Manual Page 1-37 Unit 1: PCL Emulation MACROS When creating a macro, first assign it an ID number. If this number is identical to an existing macro ID in RAM, the old macro is deleted when you specify the Macro Control Start Definition. [. . . ] Alternatively, descriptive text rather than literal text may be printed with the symbol. If printed, any character size and font available may be selected, and the text may be printed anywhere desired near the symbol. The text must not interfere with the bar code symbol or the quiet zones. FUNCTIONAL PARAMETERS FOR MAXICODE (TYPEFACE SELECTION METHOD) The data sent when using this second technique of printing MaxiCode symbols will follow the same rules that exist for data sent using the Transfer Bar Code Data Command to print MaxiCode symbols, with the following change to rule 1. [. . . ]