LGplus Series Printer LinePrinter Plus Programmer's Reference Manual

This document is a programmer's reference manual for the Digital LGplus line matrix printer, detailing how to program its various emulations using host control codes. It primarily focuses on three printer emulations: IBM Proprinter XL, Epson FX, and P-Series.

The manual outlines extensive control codes and command sequences for configuring numerous printer parameters and functionalities. These include:

• Text Formatting: Commands for character pitch (e.g., 10, 12, 15 cpi), bold, emphasized, condensed, double-wide, proportional spacing, overscoring, and underlining. It also covers print mode and quality selection (e.g., Draft, NLQ, HS, OCR).
• Character Set Manipulation: Details how to select different character sets, including international languages, and define whether certain hexadecimal codes are interpreted as control codes or printable symbols.
• Graphics Printing: Explains bit image graphics for Proprinter and Epson emulations (single, double, quadruple density) and plot mode graphics for the P-Series emulation (odd/even dot plotting), along with methods for designing bit image patterns and combining graphics with text.
• Vertical Page Formatting: Provides instructions for line feeds, form feeds, setting forms length in inches or lines, setting margins, and using vertical tabs or the Electronic Vertical Format Unit (EVFU) for precise paper movement.

Each control code is described with its ASCII mnemonic, hexadecimal code, decimal code, BASIC expression, purpose, discussion of its use, and programming examples. The document also includes an introduction to the printer's features, line matrix printing technology, and diagnostic options, along with appendices showcasing various character sets. Host control code settings generally override control panel configurations, but are typically temporary unless saved to the printer's memory.