System/370 extended architecture: design considerations

Authors:
A. Padegs
Affiliations:
IBM Information Systems and Technology Group, Poughkeepsie, New York
Venue:
IBM Journal of Research and Development
Year:
1983

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Abstract

This paper reviews the overall objectives and the design considerations that led to the System/370 Extended Architecture (370-XA). It presents an overview of the differences between the System/370 and 370-XA architectures and summarizes all architectural extensions, deletions, and changes. Then it describes in more detail the extensions for interpretive execution, 31-bit addressing, protection, tracing, inter-CPU communications, and extended-precision floating-point division.