Accession Number : AD0685202

Title :   AN INTEGRATED HARDWARE-SOFTWARE SYSTEM FOR COMPUTER GRAPHICS IN TIME-SHARING.

Descriptive Note : Technical rept. Sep 62-Mar 68,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ELECTRONIC SYSTEMS LAB

Personal Author(s) : Thornhill,Daniel E. ; Stotz,R. H. ; Ross,D. T. ; Ward,J. E.

Report Date : NOV 1968

Pagination or Media Count : 170

Abstract : This report describes the ESL Display Console and its associated user-oriented software systems developed by the M.I.T. Computer-Aided Design Project with Project MAC. Console facilities include hardware projection of three-dimensional line drawings, automatic light pen tracking, and a flexible set of knob, switch, and push-button inputs. The console is attached to the Project MAC IBM 7094 Compatible Time-Sharing System either directly or through a PDP-7 Computer. Programs of the Display Controller software provide the real-time actions essential to running the display, and communication with the time-sharing supervisor. A companion graphics software system (GRAPHSYS) provides a convenient, high-level, and nearly display-independent interface between the user and the Display Controller. GRAPHSYS procedures allow the user to work with element 'picture parts' as well as 'subpictures' to which 'names' are assigned for identification between user and Controller programs. Software is written mostly in the machine-independent AED-O Language of the Project and many of the techniques described are applicable in other contexts. (Author)

Descriptors :   (*INPUT OUTPUT DEVICES, *TIME SHARING), DIGITAL COMPUTERS, REAL TIME, INTERFACES, COMPUTER PROGRAMMING, DISPLAY SYSTEMS, CATHODE RAY TUBES

Subject Categories : Computer Programming and Software
      Computer Hardware
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE