Transcription of OPERATING SYSTEMS MEMORY MANAGEMENT - WPI
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OPERATING SYSTEMS MEMORY MANAGEMENT - WPI
8: MEMORY Management1 Jerry BreecherOPERATING SYSTEMS MEMORY MANAGEMENT8: MEMORY Management2 What Is In This Chapter?Just as processes share the CPU, they also share physical MEMORY . This chapter is about mechanisms for doing that system MEMORY Management8: MEMORY Management3 MEMORY MANAGEMENTJust as processes share the CPU, they also share physical MEMORY . This section is about mechanisms for doing that OF MEMORY USAGE:Calculation of an effective address Fetch from instruction Use index offsetExample: ( Here index is a pointer to an address )loop:load register, indexadd 42, registerstore register, indexinc indexskip_equal index, final_addressbranch continue.
8: Memory Management 12 MEMORY MANAGEMENT BARE MACHINE: No protection, no utilities, no overhead. This is the simplest form of memory management. Used by hardware diagnostics, by system boot code, real time/dedicated systems. logical == physical User can have complete control. Commensurably, the operating system has none. DEFINITION OF …
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