VT100

This user guide describes the Digital VT100 video terminal, a device designed to function as both a computer input (keyboard) and output (video screen) terminal, akin to an advanced typewriter. It covers detailed operational instructions, installation procedures, technical specifications, programming information, and available hardware options.

Key operational features include comprehensive descriptions of keyboard controls and indicators, as well as an innovative SET-UP mode that utilizes nonvolatile memory (NVR) to configure terminal settings such as display size (80 or 132 columns), communication speeds, cursor types, and character sets, eliminating the need for physical switches. The guide also outlines procedures for setting an answerback message, saving/recalling configurations, resetting the terminal, and performing built-in self-tests to diagnose fatal and nonfatal errors.

For installation, the document provides site considerations, unpacking instructions, and step-by-step setup guides, alongside user maintenance tips for cleaning. Technical specifications detail the terminal's dimensions, weight, environmental operating conditions, power requirements, display characteristics, keyboard layout, and communication interfaces (EIA RS232-C and an optional 20 mA Current Loop).

Programmer information emphasizes the VT100's compatibility with both older DEC VT52 protocols and the ANSI X3.64-1977 standard. It explains keyboard-generated codes, communication protocols (including XON/XOFF flow control and buffer management), and a comprehensive list of terminal control commands and escape sequences for cursor movement, screen manipulation, and mode settings.

Optional enhancements discussed include an Advanced Video Option, which provides extended display lines and additional character attributes (bold, blink, underline, reverse), and the 20 mA Current Loop Option for direct, short-distance host connections. Appendices define ANSI terminology and provide an ASCII code chart.