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Interactive graphics system for IBM 1800 computerA FORTRAN compatible software system that has been developed to provide an interactive graphics capability for the IBM 1800 computer is described. The interactive graphics hardware consists of a Hewlett-Packard 1300A cathode ray tube, Sanders photopen, digital to analog converters, pulse counter, and necessary interface. The hardware is available from IBM as several related RPQ's. The software developed permits the application programmer to use IBM 1800 FORTRAN to develop a display on the cathode ray tube which consists of one or more independent units called pictures. The software permits a great deal of flexibility in the manipulation of these pictures and allows the programmer to use the photopen to interact with the displayed data and make decisions based on information returned by the photopen.
Document ID
19720012532
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Carleton, T. P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Howell, D. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mish, W. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 2, 2013
Publication Date
March 1, 1972
Subject Category
Computers
Report/Patent Number
NASA-TM-X-65859
X-692-72-92
Report Number: NASA-TM-X-65859
Report Number: X-692-72-92
Accession Number
72N20182
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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