Vertical User Interface To Horizontal Microcode Via A Retargetable Microassembler

Publication
Abramson, D.A. and Rosenberg, J. "A Vertical User Interface to Horizontal Microcode via a Retargetable Microassembler", Proceedings of 8th Australian Computer Science Conference, Feb 1985, Melbourne, Australia, pp 8-1 - 8-10.
Abstract
Microcode was first introduced in 1951 as a technique for constructing the control unit of a processor [1]. Since that time, two basic forms of microcode have emerged namely, vertical microcode and horizontal microcode. This paper examines these techniques (and some variations of them) and discusses an approach which achieves the advantages of both. A new implementation of this scheme is described. The implementation aids hardware documentation and is flexible to hardware changes.
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