A display processor used to interface a 21-inch cathode-ray tube display with a small research computer is described. Inputs from an external 4K memory, incremental and absolute shaft position encoders, and data/control switches are also provided. In addition to the point-plotting and single-character mode of the display, a line generator using incremental binary rate multiplier techniques is incorporated for drawing vectors, circles, and parabolas. A character sequencer allows 4 characters per 24-bit word to be displayed, and also provides automatic carriage return and line feed for text displayed on the CRT screen.
National Research Council of Canada. Radio and Electrical Engineering Division
Report (National Research Council of Canada. Radio and Electrical Engineering Division : ERB), no. ERB-797.