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The Computer Journal 1977 20(2):156-162; doi:10.1093/comjnl/20.2.156
© 1977 by British Computer Society
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Low level architecture features for supporting process communication*

W. S. Ford § and V. C. Hamacher §

Departments of Electrical Engineering and Computer Science, University of Toronto, Toronto, Ontario, Canada

A proposal is presented for low level hardware features which would assist in the realisation of the abstraction of a computer system as a set of asynchronous communicating processes. A low level synchronisation and communication mechanism, called a mailbox, is described, together with details of a hardware structure for configuring a complete system around a set of these mailboxes. Programming for this architecture is then discussed. It is shown how the new features can be used for controlling input/output, and for handling general synchronisation.

Received June 1975.

* This research was partially supported by grant A-5192 from the National Research Council of Canada. The material forms part of the doctoral dissertation research of W.S. Ford.

§ Departments of Electrical Engineering and Computer Science, University of Toronto, Toronto, Ontario, Canada M5S 1A4


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