Mechanism resolves questions like how rather than what 263 Implementation

Mechanism resolves questions like how rather than

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be made when there is a necessity to decide whether to allocate a source or not. Mechanism resolves questions like "how" rather than "what". 2.6.3 Implementation: Operating system must be implemented after it's designed since it's the collection of many programs created by different people. Back then, operating systems were composed in assembly language; presently, most operating systems are composed in higher-level language, such as, C, C++. Operating systems can be written in multiple languages. System programs might be in higher-level languages in translated scripting languages, such as, PERL or Python. In fact, the distribution of a given Linux includes programs written in both high level and low level languages. The Master Control Program for Burroughs computers was the first system that wasn’t written in assembly language; MCP was written in the form of ALGOL; MULTICS was written in the system programming language PL/1, developed at MIT. The Linux and Windows operating system kernels are composed in C language, despite the fact that there are some small areas of assembly code for device drivers and for saving/restoring the condition of registers. The best part about using a higher- level language for executing operating systems are equivalent to those gained when the language is used for application programs:the code can be composed quicker, is more understandable, and is easier to debug. Moreover, changes in compiler technology will enhance the generated code for whole operating system by basic recompilation. At last, an operating system is simpler to port to other hardware - if it is composed in high-level language. For instance, MS-DOS was composed in Intel 8088 low level language. Thus, it runs just on the Intel.
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  • Spring '12
  • cynthiasloan

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