Crt-14 Control Relay Translator

This document introduces the CRT-14, a software tool developed by Digital Equipment Corporation to simplify the programming of the PDP-14 Programmable Controller. Instead of using complex boolean equations, the CRT-14 allows engineers to program directly using familiar relay ladder diagram symbology on a CRT or Teletype terminal.

Key features include:

• Visual Programming and Editing: Provides a visual display of control circuits and full editing capabilities.
• Documentation: Generates hard-copy output of the ladder diagram.
• Efficiency: Enables on-line equipment testing and provides the final tape required for the controller's memory.
• Compatibility: Operates on any PDP-8 family computer and is provided free with the PDP-14 system.
• Capacity: Supports up to 255 outputs, with specific design rules regarding circuit complexity, branch numbering, and octal terminal addressing (0–777, excluding 8s and 9s).

The document also provides a guide to programming via keyboard symbols, outlining the mapping of ladder diagrams to text-based inputs.