HeliOS

Developed by:
Perihelion Software Inc., USA Garnett N.H., King Tim and King Jessica

Short Description:
Helios is a distributed UNIX-like operating system for transputers. The user and programmer interfaces are similar to the ones of a real UNIX. The well-known C development language is supplied. Helios manages all the resources within the network and the c ommunications through the network. Helios is composed of a kernel located on each node. The kernel implements a message-passing communication scheme in datagram mode. Messages are transmitted and received in mail-boxes named ports. The kernel deals with t he message routing and provides the processes with semaphores as synchronization tools. The other system functions are implemented as servers.

Model: tightly-coupled
Properties: message passing, UNIX-compatible, micro kernel
Transparency: location, access
Running on: Transputers, T800
Date: 1987


References:
Perihelion Software, Ltd.: "Helios DeveloperŐs Manual", 1987, Perihelion Software, Ltd.

Perihelion Software, Ltd.: "Helios Operating System", 1989, Prentice-Hall.


© 1995, Alfred Lupper, Department of Computer Science, University of Ulm