Accession Number : AD0716440

Title :   Design of a Plotting System for a Remote Terminal of a Time-Shared Digital Computer.

Descriptive Note : Doctoral thesis,

Corporate Author : DARTMOUTH COLL HANOVER N H DEPT OF MATHEMATICS

Personal Author(s) : Dudevoir,Wilfred G.

Report Date : JUN 1970

Pagination or Media Count : 197

Abstract : The need for plotting systems which will operate from data sent to the remote terminals of time-shared digital computers is discussed. From this discussion the specifications for a plotting system are formulated. The system proposed is one which will in no way affect the central computer except through programming. It is a low-cost system which will produce smooth plots and which will provide voltages for driving analog X-Y plotters, storage cathode-ray tubes, and other voltage-driven devices. A preliminary design of two systems which meet the specifications are discussed and compared. One of the designs, a digital-to-analog multiplexer system, is selected and an engineering prototype is described. Plots of various functions plotted by the prototype on an X-Y plotter and on a storage tube are shown. All test results indicate that the system accuracy is better than 1%. System performance and costs are discussed. A listing of the computer program which is used in conjunction with the plotting system is included. The plotting data prepared by this program for a parabola and for a sine wave are also shown. (Author)

Descriptors :   (*INPUT OUTPUT DEVICES, PLOTTERS), (*TIME SHARING, DIGITAL COMPUTERS), COMPUTER PROGRAMS, DISPLAY SYSTEMS, GRAPHICS, ALGORITHMS, DESIGN, THESES, REMOTE CONTROL, COST EFFECTIVENESS, ANALOG-DIGITAL COMPUTERS

Subject Categories : Computer Programming and Software
      Computer Hardware
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE