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Compressing control ROM for VLSI microprogrammed microprocessors

Published:30 November 1980Publication History
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Abstract

By taking advantage of information redundancy and MOS structures, control ROMs for microprogrammed microprocessors can be considerably reduced. The Compressed Control ROM (CCROM) method for reducing control ROMs is described in terms of a simple example that compares the fully horizontal (unencoded) approach, the normal partially encoded approach, and the CCROM approach. Due to using CCROM, the effective cost of control ROM is considerably reduced, and this in turn can have a significant effect on the design approach by making it more cost effective to implement control signals directly from the control ROM rather than from random logic decodes.

References

  1. 1 S. Stritter and N. Tredenick, "Microprogrammed Implementation of a Single Chip Microprocessor", Preceedings of the 11th Annual Microprogramming Workshop, (December 1978). Google ScholarGoogle ScholarDigital LibraryDigital Library
  2. 2 J. McKevitt and John Bayliss, "New Options From Big Chips", IEEE SPECTRUM, March 1979, pp. 28-34.Google ScholarGoogle Scholar
  3. 3 J. Nash and M. Spak, "Hardware and Software Tools for the Development of a Microprogrammed Microprocessor", Preceedings of the 12th Annual Microprogramming Workshop, (December 1979). Google ScholarGoogle ScholarDigital LibraryDigital Library
  4. 4 P. Meyer, Introductory Probability and Statistical Applications, Addison-Wesley Publishing Co., Inc., Reading, Mass., 1970.Google ScholarGoogle Scholar

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  1. Compressing control ROM for VLSI microprogrammed microprocessors

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          • Published in

            cover image ACM SIGMICRO Newsletter
            ACM SIGMICRO Newsletter  Volume 11, Issue 3-4
            Dec. 1980
            177 pages
            ISSN:1050-916X
            DOI:10.1145/1014190
            Issue’s Table of Contents

            Copyright © 1980 Author

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            Association for Computing Machinery

            New York, NY, United States

            Publication History

            • Published: 30 November 1980

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