RTFAS on-line film analysis system

The control organization of calculating processes in the RTFAS on-line film analysis system is considered. The system realizes a primary image data processing and comprises scanning-measuring projectors, PDP-8 mini-computer, central DEC-10 computer and asynchronous computer networks, connecting DEC-10 and mini computers. Considerable attention has been given to the problems of soft-ware functioning of the central computer. The organization of the system soft-ware is based on the following conceptions: regular usage of the soft-ware functional decomposition, organization of DEC-10 computer calculating processes by the asynchronous principle of control of the system functioning and introducing an abstract projector, i.e. drifting in the mini-computer of all functions of the program processor. The technological structure of the system software is described in detail which is subdivided into three levels: administrative, technological and local. Basic functions of the administrative level, being common for the whole system, are concentrated in the operational program, which is the expansion of the DEC-10 computer operational system. At the technological level the system soft-ware comprises organizing programs, transport stations and program data control. All local control problems are solved by mini-computers. The discipline of the RTFAS system resources scheduling at the DEC-10 computer is considered. The organization of the resources distribution mode is based on service information base data and on using standard means of the DEC-10 computer operational system. The correctness and efficiency of the control organisation of calculating processes is confirmed by the practice of RTFAS system operation