Status Report on TU Vienna's Hybrid Time Sharing System

The hybrid time-sharing system MACHYS is presented. It has been developed at the Hybrid Comp Centre of the Technical University in Vienna and is fully operational since September 1982. Up to 8 hybrid users can have simultaneous access to all hybrid computing resources, either from terminals or remote telephone links. The mathematical building blocks of a fully equipped EAI 680 analog computer are controlled by high level software commands in an machine independent way, using an electronic analog switch matrix and a self developed parallel logic processor. The interactive compiler HYBSYS supports a problemoriented, block structured model definition. Simple commands allow optimal online scaling, grafic and alphanumeric documentation as well as sophisticated experiments with the model like parameter optimization and nonlinaer zero finding.