Computer Science – Operating Systems
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2479...62b&link_type=abstract
Proc. SPIE Vol. 2479, p. 62-68, Telescope Control Systems, Patrick T. Wallace; Ed.
Computer Science
Operating Systems
3
Scientific paper
The DRAMA software environment has been developed at the Anglo-Australian Observatory to facilitate the development of instrument and telescope control systems. It is designed to run on a distributed system consisting of machines running a variety of operating systems including UNIX, VAX/VMS, and VxWorks. DRAMA builds on ideas from the ADAM system in use at a number of observatories. It is based on the concept of a `task' which is a software object which responds to messages requesting it to perform actions. The message system provides network transport using TCP/IP as well as optimized local transport for each machine. Messages are encoded using a self-defining hierarchical data system (SDS) which allows complex data structures while transparently handling differences in machine architecture. Tasks are coded using a standard event driven structure which can be used for applications ranging from low level real-time systems to user interfaces. The latter are developed using the Tcl/Tk package incorporated into DRAMA tasks.
Bailey Jeremy A.
Farrell Tony
Shortridge Keith
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