The automation of each stage in the design and manufacture of computer systems is now being considered. The design language simulators, physical design systems and test systems are already in practical use. At present, however, the required verification of each stage is mostly performed manually. In consideration of this, the authors designed and developed an automatic system for constructing logic circuit diagrams (RADICS) aiming at easy manual verification and documentation. Seven criteria are specified for the visibility, which include the signal flow from input to output as well as the criteria adopted in the previous placement and routine system. This paper describes the aims and outlines of each algorithm in RADICS. The algorithms are then analyzed and evaluated.
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