The Digigraphic Display Program

This document outlines the Digigraphic Display Program (DDP), a software system developed for the DX-1 computer to facilitate digital drawing and drafting.

Key features include: - System Components: Details regarding the use of the DX-1 system, including a PDP-1 computer, display scope, light pen, and push-button control panel. - Man-Machine Control: Comprehensive explanations of the user interface, including the use of "Pick" and "Sketch" modes for drawing points, lines, circles, arcs, and curves. - Construction & Scaling: Methods for manipulating entities, assigning group numbers, and managing magnification and scale settings for various types of drawing output. - Special Functions: Procedures for alphanumeric input and using custom auxiliary functions.

The DDP enables users to generate complex, flicker-free graphical displays while storing information in a condensed digital "Entity Table" format.