21.1. The mainframe architecture
The mainframe architecture is a long-lived architecture that is designed to excel at business computing. This section is for readers looking for a quick understanding of what an explicit architecture can do for them, as well as an understanding of the key architectural components in z/Architecture that contribute to the mainframe's robustness. This section discusses what architecture is, the mainframe instruction set, mainframe recoverability, storage, and the interrupt structure. The full mainframe architecture is described in z/Architecture Principles of Operation, SA22-7832.
The mainframe is based on the von Neumann computer model illustrated in Figure 21-1. While most computers are based on this model, the ...
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