It permits an interrupted process to resume operation after the interrupt has been handled. The information is held in the program status register, and usually contains the value of the program counter and bits indicating the status of various conditions in the ALU such as overflow and carry, along with the information on supervisor privileged status. The contents of other processor registers may also need to be preserved in memory after an interruption of a process and recovered when the interrupted process is resumed so that the complete process state is reestablished. An operating system executes a variety of programs: Batch system – jobs Time-shared systems – user programs or tasks Textbook uses the terms job and process almost interchangeably Process – a program in execution; process execution must. Project Status Review Last modified by J. Created Date 3/12/2001 9:52:06 PM Document presentation. Times New Roman Arial Default Design Microsoft Graph 97 Chart Microsoft Word Document Project Name Agenda Open Items from Prior Review.
See also processor status word.
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