VT 240 Series Programmer Pocket Guide

This document is a pocket guide that summarizes information from the VT240 Programmer Reference Manual, intended to help programmers access VT240 terminal features. It covers a wide range of programming and control aspects for the VT240 terminal.

Key areas of the guide include:

• Character Encoding: Detailed tables and descriptions of 7-bit and 8-bit codes, including ASCII, DEC Multinational Character Sets, DEC Special Graphics, and various National Replacement Character (NRC) Sets (e.g., British, Dutch, French, German, Italian, Spanish).
• Terminal Control Mechanisms: Explanations of Escape Sequences, Control Sequences, and Device Control Strings used to manage terminal operations.
• Transmitted and Received Codes: Descriptions of codes generated by various keys (keypad, editing, cursor, function, control characters) and how the terminal interprets received control characters and sequences, including character set selection and cursor positioning.
• Terminal Modes and Features: Information on setting tab stops, graphic rendition, character and line attributes, editing and erasing functions, margin control, printing options, and user-defined keys (UDK).
• Reporting: Details on how to request and interpret reports on device attributes, printer status, user-defined key status, keyboard language, and terminal identification.
• ReGIS Graphics Protocol: A comprehensive summary of ReGIS commands for controlling graphics, including screen control, positioning, writing, vector and curve drawing, polygon filling, text manipulation, and macrograph definition.
• 4010/4014 Compatibility Modes: Guidance on entering and exiting 4010/4014 emulation modes, along with summaries of commands available in alpha, graph and point plot, incremental plot, and GIN modes.