LGplus Series Printer Digital (LG) Emulation Programmer's Reference Manual

This document is a programmer's reference manual for the Digital LGplus Series Printer, specifically focusing on its Digital (LG) emulation mode. It is designed to help users program the printer by detailing its control codes and character sets.

The manual is organized into four main chapters and several appendices:

• Introduction: Provides an overview of the LGplus line matrix printer, its features (including various printer emulations like LG, Proprinter XL, Epson FX, P-Series, PGL, VGL), host computer interfaces (Centronics, Dataproducts, Serial RS-232), text formatting and language options, graphics and vertical formatting, diagnostics, and a general explanation of line matrix printing technology and speed.
• Digital Emulation Control Codes: Describes the specific control code commands that can be sent to the printer via the host data stream to configure LG emulation parameters. This includes single-byte control codes and multi-byte escape sequences, covering their types, parsing requirements, and detailed descriptions for functions such as setting/resetting modes, spacing, vertical formatting, managing forms, logos, page print areas, cursor motion, tab stops, character set selection, and printer status requests.
• Character Sets: Lists and describes the various character sets supported by the LG emulation, including ASCII, DEC Multinational, ISO, Digital Supplemental Graphic, VT100 Special Graphic, DEC Technical, and JIS Katakana. It also provides guidance on selecting character sets and languages.
• Bar Codes: Explains how to print bar codes using LG emulation control codes, detailing bar code characteristics (e.g., number of bars per character, quiet zones, intercharacter gaps, checksums, parity) and various supported bar code styles such as Code 39, Extended Code 39, Code 11, Codabar, EAN, Interleaved 2 of 5, Postnet, and Code 128 (USS and UCC).
• Appendices: Include character set charts, information on configuring the VMS operating system, font type family and file IDs, and print samples.

Overall, the manual serves as a comprehensive guide for developers to program and control the LGplus printer in Digital (LG) emulation mode, offering detailed command syntax, parameters, and explanations for various printing and graphic functionalities.