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RESIDENT MONITOR: Primitive Operating System. Usually in low memory where interrupt vectors are placed. Must check each memory reference against fence ( fixed or variable ) in hardware or register. If user generated address < fence, then illegal. User program starts at fence -> fixed for duration of execution. Then user code has fence address ...
Resident Monitor Holds initial control, control transfers to job and then back to monitor. Problem Need to distinguish job from job and data from program. Principles of Operating Systems - Lecture 1 28 From John Ousterhout slides
29 Ιουλ 2019 · 10th edition of Operating System Concepts by Abraham Silberschatz, Peter B. Galvin, and Greg Gagne.
Resident Monitor In this type of system, there are 2 sections of memory: one for the monitor, the other for the user. The monitor is usually put wherever more convenient; as the interrupt vectors are usually in low memory, so is the monitor.
16 Οκτ 2024 · The Resident Monitor is a code that runs on Bare Machines. The resident monitor works like an operating system that controls the instructions and performs all necessary functions. It also works like job sequencer because it also sequences the job and sends them to the processor.
• Computer now has a resident monitor: – initially control is in monitor. – monitor reads job and transfer control. – at end of job, control transfers back to monitor. • Even better: spooling systems. – use interrupt driven I/O. – use magnetic disk to cache input tape. – fire operator. • Monitor now schedules jobs. . .
Key control information comes first followed by the various resident operating system routines. The remaining memory, called the transient area is where application programs and transient operating system routines are loaded.
