DECgraphic-11 FORTRAN Reference Manual

This reference manual provides detailed instructions for using the DECgraphic-11 FORTRAN support package in both RT-11 and RSX-11M operating environments. It covers:

• Basic Graphics Concepts: Introduces display screens, the display file, and graphics primitives.
• Graphics Subroutines: Detailed documentation of FORTRAN-callable routines for initializing the display, setting screen parameters, creating subpictures, and interacting with the light pen.
• Programming Techniques: Best practices for memory efficiency and system performance.
• System Environment Setup: Procedures for building graphics libraries and linking user programs for RT-11 and RSX-11M.
• Technical Appendices: Includes a full subroutine summary, error message guide, and display file structure documentation.