VT 240 Series Programmer Pocket Guide

This "VT 240 Series Programmer Pocket Guide" serves as a concise summary of the essential information for programmers interacting with the VT240 terminal, derived from the comprehensive VT240 Programmer's Reference Manual. It provides a quick reference for accessing and controlling the terminal's features programmatically.

The guide is organized into key sections covering:

• Character Encoding: Details 7-bit and 8-bit codes, ASCII, DEC Multinational, UK National, and DEC Special Graphics character sets, including display control fonts.
• Control Mechanisms: Explains escape sequences, control sequences, and device control strings for various operations.
• Transmitted and Received Codes: Lists codes generated by main keypad, editing, cursor, auxiliary, and top-row function keys, as well as received codes for compatibility levels, ASCII, and C1 control characters.
• Terminal Modes and Configuration: Describes how to set terminal modes (e.g., keyboard action, scrolling, ANSI/VT52), perform character set selection (SCS), and manage C1 control transmission.
• Display and Cursor Control: Provides commands for cursor positioning, tab stops, graphic rendition (SGR), character and line attributes, editing, erasing, and setting screen margins.
• Printing and Customization: Covers auto print mode, printer controller functions, user-defined keys (DECUDK), and down-line loading of characters (DRCS).
• System Reports: Outlines sequences for requesting device attributes (DA), device status reports (DSR), and terminal identification (DECID).
• Graphics Protocols: Summarizes commands for ReGIS Graphics Protocol (screen, position, write, vector, curve, text, load, macrograph, and report commands) and 4010/4014 emulation mode (including Alpha, Graph and Point Plot, Incremental Plot, Gin, and Bypass modes), along with VT52 escape sequences.

This pocket guide is an indispensable tool for developers to quickly reference and implement the programming commands required to utilize the extensive functionalities of the VT240 series terminals.