Introduction to z/Architecture
This chapter provides an overview of z/Architecture.
z/Architecture is the next step in the evolution from System/360 to System/370, System/370 Extended Architecture (370-XA), Enterprise Systems Architecture/370 (ESA/370), and Enterprise Systems Architecture/390 (ESA/390). In order to understand z/Architecture, you have to be familiar with the basics of ESA/390 and its predecessors.
An address space maps all of the available addresses—and includes system code and data, and may include user code and data. Thus, not ...

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