Architecture of the IBM system/370
Communications of the ACM - Special issue on computer architecture
Scalable I/O - a well-architected way to do scalable, secure and virtualized I/O
WIOV'08 Proceedings of the First conference on I/O virtualization
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The 370-XA channel subsystem architecture represents a significant extension of the corresponding System/370 architecture. This paper examines the need for these extensions, discusses the important features and facilities of the new architecture, and provides comparisons with its predecessor, the System/370 channel architecture. It also describes, from an operational viewpoint, how these new concepts affect I/O processing and how they relate to the current trend toward using multiple CPUs, increasing CPU execution speed, and increasing the number of I/O attachments.