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Three Decades of Hardware Description Languages in Europe
Jean Mermet,Peter Marwedel,Franz J. Ramming,Cleland Newton,Domminique Borrione,Claude Lefaou 한국정보과학회 1998 Journal of Electrical Engineering and Information Vol.3 No.6
This paper binds together a collection of short presentations on Hardware Description Languages(HDLs) developed in Europe and provides a view of the history of HDLs during the last three decades. This historical review wants to present the ideas, conceived in these previous languages, which are now implemented in the standard languages. Furthermore, this paper will highlight those early concepts which yet need to be implemented in the evolving standards or could provide a way to unify them (like VHDL or Verilog or SDL) within a formally defined multi-language environment. Among a large number of European works over 3 decades, we have selected a sample from different countries France, Germany, U.K, Italy, which have been implemented and used reliably in various segments of the industry. The selected HDLs, with the date of origination, are: CASSANDRE (1967), MIMOLA (1977), DACAPO (1977), ELLA(1979), ART (1980), and CASCADE (1981). We do not pretend to any exhaustive review, which is not the goal of this presentation, and have consciously left aside several works as valuable as those selected. We have not addressed for example ≪ synchronous languages ≫ very well developed in France, such as ESTEREL, LUSTRE or SIGNAL. Several other works existed in Germany, such as KARL, which was popular in the eighties, and benefits from a large bibliography or REGLAN. We should mention also among those HDLs not presented here CONLAN (a major international standardization effort involving a notable European contribution). We have tried to compare the main features of the chosen languages according to a list of criteria and briefly identify those which are still missing in the recognized worldwide standards.