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Stand-Alone Wiring Program for Josephson Logic

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1 Author(s)
Donath, W.E. ; IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA

This paper describes a channel routing wiring program and its interface to the user. Of particular interest are its interface facilities, which permit manual update of the routing, pre-routing, and incremental routing. A hierarchical organization of the logic is feasible, which permits moving of complex entities, such as latches, adders and others, as complete entities. The internal wiring of these entities could either be done manually and be fixed before layout, which would be desirable when the wiring was used as a delay line, or could be left in the wiring program, which would route them more flexibly. The features above are made possible by the special-interface organization used here. In this interface the pins on the devices can be directly addressed, relatively addressed, and indirectly addressed; a simple macrocompiler permits the hierarchical organization of the data.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:24 ,  Issue: 4 )