BASIC/RT-11

The BASIC/RT-11 Language Reference Manual is a definitive guide for programmers using the BASIC language within the RT-11 operating system environment. It details the language's fundamental operations, including arithmetic functions, string handling, file control, and the ability to integrate assembly language routines. The manual is organized into chapters that cover:

• Introduction and Startup: Procedures for loading and interacting with BASIC/RT-11.
• Arithmetic and Strings: Data types, variables, expressions, and string manipulation techniques.
• Operational Modes: How to utilize immediate mode for debugging and direct statement execution.
• Language Statements: Comprehensive definitions of BASIC statements such as LET, PRINT, INPUT, READ/DATA, and flow control (FOR-NEXT, GOSUB, etc.).
• Functions: Both standard mathematical and string functions.
• Advanced Integration: How to call and link assembly language routines with BASIC programs.
• File Operations: Managing sequential and virtual memory files.
• Error Handling: An extensive list of error messages to facilitate debugging.

It is intended for users who have a basic familiarity with the standard BASIC language.