AbstractA simple nucleus for a single‐processor computer is considered. The entire nucleus program is written in the high‐level programming language Modula‐21without assembly coding. The concepts of the nucleus and some simple applications are described. A complete listing of the nucleus is included. We conclude that programming of a nucleus in an appropriate high‐level language is simpler than in an assembly language. The resulting nucleus has a comparable performance with other nuclei written in assemb
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