Providing the interface to communicate with the operating system kernal is called system call. Without system call, communication between operating system and hardware is not possible. Accessing the files and process communication is possib...
http://www.blurtit.com/q998764.html
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System calls are used whenever a program needs to access a restricted resource, eg a file on the hard disk, any hardware device, or when it needs to print or draw to the screen
http://wiki.answers.com/Q/What_is_the_purpose_of_a_syst...
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system calls let you make use of software functions that are built into an operating system
http://wiki.answers.com/Q/What_is_the_purpose_of_the_sy...
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What is the purpose of system calls, ... When a system call is encountered, the OS transfers control to the subroutine in the kernel which does the operation for which the system call provides the interface to the application program. This kernel system call routine is the system call in an important sense since it does...
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www.ittc.ku.edu/~niehaus/classes/f95-678/hw1-key.html
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capturing said GPIB call made to the GPIB driver software, ... 28. A General Purpose Interface Bus (GPIB) system, comprising; a computer system including a CPU, memory, and a display screen, wherein the memory stores a GPIB application and GPIB driver software; a GPIB interface coupled to the computer system;
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www.patentstorm.us/patents/5964892-claims.html
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The first step in implementing a system call is defining its purpose. What will it do? The syscall should have exactly one purpose. Multiplexing syscalls (a single system call that does wildly different things depending on a flag argument) is discouraged in Linux.
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www.freeweb.hu/linuxkernel2/ch05lev1sec4.html
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Whenever an event occurs that the OS needs to know about (e.g., a system call), the simulator makes a procedure call into the Nachos kernel in the file exception.cc, function ExceptionHandler. All necessary items you need to know about (e.g., which system call, parameters, ... These registers are general purpose registers,
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www-scf.usc.edu/~csci402/assignment2/p2_doc_new3.html
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System call - Wikipedia, the free encyclopedia
In computing, a system call is the mechanism used by an application program to request service from the operating system based on the monolithic kernel or to system servers on operating systems base...
en.wikipedia.org/wiki/System_call
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