GIGI BASIC Manual

This document is the GIGI BASIC Manual, published by Digital Equipment Corporation in January 1981.

It serves as a comprehensive guide for users and programmers of GIGI BASIC, a tailored version of Microsoft BASIC specifically designed for the GIGI terminal.

The manual is divided into three main sections and appendices:

1. General Information: Covers fundamental concepts such as how to run GIGI BASIC (in local or host modes), line format, character set, types of constants and variables, expressions, and various operators (arithmetic, relational, logical, and functional). It also includes details on input editing, error messages, and graphics control for the GIGI terminal.
2. Commands and Statements: Provides an alphabetical reference for every command and statement in GIGI BASIC, detailing their syntax, purpose, and usage with examples (e.g., AUTO, CLEAR, FOR...NEXT, GOTO, INPUT, PRINT, RUN, SAVE, STOP, WHILE...WEND).
3. Functions: Describes all intrinsic GIGI BASIC functions, categorized by their purpose (e.g., mathematical, string manipulation, and system-related functions like ABS, CHR$, SIN, SQR, LEFT$, MID$, RND, and GIGI-specific graphics control functions like GOFF$ and GON$).

The document also includes appendices summarizing error codes, mathematical functions (derived), and ASCII character codes. It notes that while GIGI BASIC makes the GIGI an "intelligent terminal," complex applications are recommended for a host computer due to limited user memory. Differences between GIGI BASIC and standard DEC BASIC implementations are highlighted.