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Monitor Point of View










                                                                                                              Interrupt
                                                                                                              Processing
        Monitor controls the sequence                                                                         Drivers
                                                                                                                Device

            of events                                                                        Monitor             Job

                                                                                                             Sequencing

        Resident Monitor is software                                                                     Control Language
                                                                                                             Interpreter
                                                                                  Boundary
            always in memory




        Monitor reads in job and gives                                                                          User


            control                                                                                            Program
                                                                                                                 Area


        Job returns control to monitor






                                                                                        Figure 2.3   Memory Layout for a Resident Monitor
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