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Security on the IBM Mainframe: Volume 1 A Holistic Approach to Reduce Risk and Improve Security by Jan Thielmann, Botrous Thalouth, Vinodkumar Ramalingam, Madhukar Reddy Nali, Brian Hugenbruch, Cesar Goldkorn, Lennie Dymoke-Bradshaw, Boudhayan Chakrabarty, Axel Buecker

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Hardware components
This chapter explains the concepts behind the different hardware components of a mainframe environment. It also explains their functions and their applications. This chapter describes the mainframe processor architecture, different components within a central processor complex (CPC), the external interfaces for the mainframe, and other peripheral devices.
There are different types of processors within a processing unit (PU), such as the general-purpose processors (GPs), System Assist Processors (SAPs), and specialty processors, ...

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