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OPERATING SYSTEM FOR A MICROPROCESSOR-BASED INTERACTIVE GRAPHIC TERMINAL.
Abstract
The paper presents the definition, structure and implementation techniques adopted for the operating system of a graphic video terminal using microprocessors, that is being now realized at the politecnico di Milano. The overall design philosophy is one of great modularity, allowing to make use of the same basic frame - hardware and software - for implementations of varying complexity and capacities. To these basic requirement machine-independence should be guaranteed as far as possible. This is achieved in our case by avoiding techniques making use of features nongeneral to all microprocessors, and recurring to suitable control and data structures for the operating system itself. While portability could not complete (the system being written in assembly language), a top-down approach to the system's design ensures ease of coding and translation.
To date, special attention has been addressed to small operating systems for the management of concurrent, real-time, processes, on microprocesses machines. Nevertheless a small operating system for the management of sequential processes is in itself interesting. The design of such a small operating system is discussed, for the case of ROM-based microprocessor machines, that is machines without mass memory. After having carefully identified a class of applications, a set of design goals has been established. A system structure, characterized by some unconventional features, is then described. Special attention is given to operator interfacing (built-in keyboard), system initialization, delay implementation, synchronization problems, ease and flexibility of use and structural simplicity.
This bibliography is the result of an attempt to gather in one location references to all publications relevant to computer graphics which appeared in book form, in academic journals, in conference proceedings, and as Ph.D. theses during the years 1976, 1977 and 1978. Part C contains 1030 references arranged in lexicographical order by authors. These were gathered by systematically searching selected journals and conference proceedings. Part B (Keyword Index) is divided into 9 sections:- 1) general references; 2) graphical languages, programming languages, graphical data, and data bases; 3) graphical systems; 4) graphical hardware and software; 5) methodology/techniques/modeling; 6) algorithmic and mathematical aspects; 7) specific interest areas of computer graphics; 8) man-machine communication; 9) applications. -from Author
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