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HYDRA Basic Kernel Reference Manual.

Author: Ellis CohenBill CorwinDave JeffersonTom LaneRoy LevinAll authors
Publisher: Ft. Belvoir Defense Technical Information Center 04 NOV 1976.
Edition/Format:   Print book : English
Database:WorldCat
Summary:
This document is a reference manual for the Hydra Kernel. It contains a minimal amount of tutorial information. Readers who are not familiar with the ideas behind the capability-based protection systems so vital to Hydra are encouraged to read first the Hydra article in the CACM (Wu74), and the collection of papers given at the Fifth Symposium on Operating Systems Principles, particularly the paper by Cohen (Coh75).  Read more...
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Document Type: Book
All Authors / Contributors: Ellis Cohen; Bill Corwin; Dave Jefferson; Tom Lane; Roy Levin; CARNEGIE-MELLON UNIV PITTSBURGH PA Dept. of COMPUTER SCIENCE.
OCLC Number: 227450214
Description: 83 pages

Abstract:

This document is a reference manual for the Hydra Kernel. It contains a minimal amount of tutorial information. Readers who are not familiar with the ideas behind the capability-based protection systems so vital to Hydra are encouraged to read first the Hydra article in the CACM (Wu74), and the collection of papers given at the Fifth Symposium on Operating Systems Principles, particularly the paper by Cohen (Coh75). There is a default user environment, consisting of the Hydra kernel and a collection of subsystems, that a user initially faces when he logs on to Hydra. Hydra is thus a software virtual machine implemented on C.mmp, a closely-coupled PDP-11-based multiprocessor. The extended virtual machine instructions, i.e. those not provided by the underlying hardware but by Hydra, are called K-calls, or Kernel calls.

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