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A general and flexible switchbox router: CARIOCA

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3 Author(s)
P. F. Dubois ; CNET, Meylan, France ; A. Puissochet ; A. M. Tagant

A switchbox router utilizing layers is presented. Each net is first partitioned into a set of subnets. This decomposition is driven by the minimum Steiner tree. The construction is then carried out on a step-by-step basis, which allows the system to dynamically take new information on the problem into account. The information is examined by a set of expert systems which decide which subnet should be routed next. This part has been implemented with a blackboard architecture. The router can handle pins that are not on a grid on one set of parallel edges. The program has been implemented in the LISP programming language. Many test cases have been run successfully, and some results, including Burstein's difficult switchbox, are presented

Published in:

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:9 ,  Issue: 12 )