DISPLAY OF INFORMATION FROM THE IMMEDIATE-ACCESS STORAGE OF A DIGITAL COMPUTER ON THE SCREEN OF A CATHODE-RAY TUBE,
Abstract
A method for generating computer-programmed readout displays is discussed. The technique uses the storage facilities of the BESM-6 and a standard TV picture tube having a 400 x 400 point raster. It is designed for graphical and alphanumeric displays, up to a maximum of 1200 symbols, including Latin and Cyrillic characters, numbers, and signs. External programs for alphanumerics, for example, are stored on four tracks of a BESM-6 drum. A symbol is generated in a sub-raster of 8 x 8 bits, in two drum revolutions; since drum speed is 2850 rpm, full raster rate is 24/sec. A figure shows an example of writing the given Cyrillic. Codes are parallel-stored in a shift register, and then read out sequentially and applied to the display tube electrodes as shown in a figure. Since the drum tracks are in four quadrants, there is an information gap in readout; this is compensated for by forming the main raster in eight 50-line subframes, and backing up the delayed portions by one line, thus eliminating image gap and minimizing flicker. Horizontal lines are one line width apart, and symbols are spaced 1/3 of a symbol width apart. The proposed display method is recommended for its simplicity and flexibility. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 12, 1970
- Accession Number
- AD0712805
Entities
People
- I. A. Artamonov
- I. K. Krymskii
- L. A. Emelyanova
- S. G. Shmatalo
- Yu. I. Torgov
Organizations
- National Air and Space Intelligence Center