The Mjølner System: Public Domain

This page contains information on Public Domain software etc., related to the BETA language.

The BETA Language Definition

The BETA language definition is in the public domain. A formal language definition does not exist, but all parts of the language are described in

Ole Lehrmann Madsen, Birger Møller-Pedersen, Kristen Nygaard:
"Object-Oriented Programming in the BETA Programming Language"
Addison-Wesley and ACM Press, 1993
ISBN 0-201-62430-3

The book can be downloaded free of charge in PDF format from books.html#betabook.

Free Download of The Mjølner System

The Mjølner System is available for free download from

https://beta.cs.au.dk/mjolner-system/download.html.

It is not in the Public Domain, but is restricted by the Mjølner System Licence Aggreement.

Public Domain Compilers

Erik Ernst has created the language gbeta and a compiler for it.
gbeta is a generalization of the programming language BETA. You can download a compiler/interpreter for gbeta, and the source code of this implementation is freely available under the GPL license.
More at http://www.cs.au.dk/~eernst/gbeta/.

Kai Petzke has earlier initiated a project for writing a freeware compiler for BETA. It was implemented as a translator of BETA to C. For more information and to download a working copy of the compiler, that understands most of BETA's grammatical terms, see the web page: http://troubadix.physik.tu-berlin.de/~petz0433/beta/eindex.html (no longer present).

BetaGUI

BetaGUI is a small Windows 95 and Windows NT application, that combines an easy-to-use editor screen as well as a powerful controlling mechanism for the Mjølner System itself. Now you somehow feel like coding BETA in a Delphi environment.

BetaGUI offers the following to its user:

all in one editor and errormessages window
ability for unlimited number of sources open
project file support
configurable for use with different SDKs and env-variable handling
multi-user support
and many more.

Download your version of BetaGUI http://www.elitedev.com/products/BetaGUI/index.html (no longer present).

Send bugreports and suggestion for improvements to one of the following e-mail addresses: Jens Georg or Marc Hoffmann.

BetaGUI for the Mjølner System is created using Borland Delphi.