Accession Number : AD0878975

Title :   A High Speed Disc Memory and a Color Image Display for a Small Computer.

Descriptive Note : Technical rept.,

Corporate Author : KANSAS UNIV CENTER FOR RESEARCH INC LAWRENCE

Personal Author(s) : Lucas, James A.

Report Date : OCT 1970

Pagination or Media Count : 221

Abstract : The display system presented in the thesis is capable of displaying black and white image data with 64 grey levels, color image data, or merely dot patterns for alpha-numeric output. Unlike most computer display systems which require a large amount of magnetic core memory, the display system described in this thesis utilizes a low cost fixed head digital disc memory which has a maximum readout of 24 binary digits per 1/3 microsecond. Similar discs are available with output capabilities of 72 binary digits per 1/3 microsecond. The cost per bit of the digital storage is only one-half of a cent as compared to seven to twelve cents per bit for magnetic core memory. A six bit seven megahertz digital to analog converter was designed and utilized in the interface from the digital disc to the monitors. Three of these converters are needed for a color system. (Author)

Descriptors :   *DISK RECORDING SYSTEMS), (*DIGITAL COMPUTERS, DISPLAY SYSTEMS), (*INPUT OUTPUT DEVICES, COLOR TELEVISION), (*DATA STORAGE SYSTEMS, COLORS, INFORMATION RETRIEVAL, VISUAL PERCEPTION, CATHODE RAY TUBES, COMPUTER PROGRAMMING, INTERFACES, DIGITAL TO ANALOG CONVERTERS, LOGIC CIRCUITS, THESES.

Subject Categories : Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE