December 2006
Intermediate to advanced
228 pages
6h 20m
English
book
Introduction to the New Mainframe: Large-Scale Commercial Computing
by Mike Ebbers, Pilar Gonzalez Adrados, Frank Byrne, Rodney Martin, Jon Veilleux
Content preview from Introduction to the New Mainframe: Large-Scale Commercial Computing
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Appendix A. Architecture summary 165
Security
The PSW is the focal point for architected security. The program state bit
restricts the instructions that can be issued and the protect key restricts the
storage that may be altered. To request restricted services, a program in problem
state issues an SVC. The SVC interrupt loads a new PSW, which switches to
supervisor state.
166 Introduction to the New Mainframe: Large-Scale Commercial Computing
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.