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Show 104 the designer will usually prefer doing the design on Computervision. The lack of useful output routines from SLATE also make its use as an editing tool impossible. SLATE would require a major redesign in order to be made effective. Gi ven the need for such a redesign, 1t would be preferable to make SLATE cell (structure) oriented rather than text oriented. A related project currently being pursued oy a graduate student at the University of Utah on an interactive LISP based PPL editor will probably be moved to PSL from Franz LISP and make the system much more desirable. tools. The development of a universal VLSI Integrated Circuit 7.2.2 PPL and VLSI Databases If such things as a PPL editor, PPL simulator, Speed-Independent Control-Unit Compiler, and other tool are to be successfully integrated, there must be a common database available to all these database administrator under PSL would give these programs and others a common interface to related data and solve the "throw-away software" syndrome that has plagued VLSI software efforts at Utah. The development of such a database will require careful thought in order to make the database extensible and useful. SIPPLDL is a useful tool for describing PPL programs in a CIFlike style, but is not general enough to serve for anything except an intermedfate form on the way to composite generation. The method of representing PPL cell sets in LISP resulted in a |