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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162 Introduction to the New Mainframe: Large-Scale Commercial Computing
Interrupt processing
An interrupt is an event that alters the sequence in which the processor executes
instructions. An interrupt might be
planned (specifically requested by the
currently running program) or
unplanned (caused by an event that might or might
not be related to the currently running program). z/OS uses six types of
interrupts, as explained here:
Supervisor call or SVC interrupts - occur when the program issues an SVC
instruction. An SVC is a request for a particular system service.
I/O interrupts - occur when the channel subsystem signals a change of
status. For example, an I/O operation completes, an error occurs, or an I/O
device (such as a printer) becomes ...
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