W01-02A_SysSoftware

W01-02A_SysSoftware - 02A System Software CSC 230...

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02A System Software SC 230 CSC 230 Department of Computer Science University of Victoria
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System Software ollection f programs ± collection of programs ± interpreting user commands anaging storage and retrieval of files from storage ± managing storage and retrieval of files from storage ± controlling I/O units ± linking and loading and executing user programs ± OS = key system software component Î to control sharing and interaction among computer units while executing pplications applications pplication OS loads CPU application program MEMORY executes DISK
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System Software Printer Disk OS routines Program t 0 t 1 t 2 t 3 t 4 t 5
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Typical structure you are here user/application program operating system computer hardware ± middle level hides the underlying hardware resents multiple users and multiple tasks with the appearance ± presents multiple users and multiple tasks with the appearance that each is in sole possession of the machine ± each has a virtual or abstract machine on which to run.
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What are “Machine Structures”? S 230 Operating Application (ex: browser) CS 230 /O system rocessor Compiler System (Mac OS X) Instruction Set rchitecture emory ardware Software Assembler I/O system Processor igital Design Architecture Datapath & Control Memory Hardware Digital Design Circuit Design transistors * Coordination of many levels (layers) of abstraction
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This note was uploaded on 01/15/2012 for the course CSC 230 taught by Professor Jasond.corless during the Summer '11 term at University of Victoria.

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W01-02A_SysSoftware - 02A System Software CSC 230...

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