Digital Ansi-Compliant Printing Protocol Level 2 Program. Sup

This document, the "Digital ANSI-Compliant Printing Protocol Level 2 Programming Supplement," provides device-specific technical details for programmers using Digital Equipment Corporation's advanced character cell printers. It acts as a supplement to the general DEC PPL2 (Digital ANSI-Compliant Printing Protocol Level 2) reference manual.

The supplement covers three specific printer models: the LA75 Plus Companion Printer, the LA310 MultiPrinter, and the LA600 MultiPrinter. For each model, it details:

• General Information: Printer descriptions, supported alternate protocols, and DEC PPL2 extensions and exceptions.
• Physical Characteristics: Paper handling, text resolution (horizontal and vertical), partial line motion limits, and tab support.
• Initial States: Default settings for various printer functions.
• Status and Error Reporting: Codes and messages for device attributes, secondary attributes, and operational status.
• Fonts and Character Attributes: Built-in and cartridge font repertories, density selection, downloaded fonts, and character slant.
• Graphics: Sixel graphics considerations and resolution fallbacks.
• Control Characters: Functions of specific control characters like Bell and EOT.
• Bar Code Printing: Extensive details on supported bar code styles and attributes for the LA600 MultiPrinter.

Appendices include information on printer communication interfaces (serial and parallel), a comparison of DEC PPL2 command implementations across the different printer models, and definitions for new DEC PPL2 commands.