assembly - Is operating system an abstraction? -

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how matter if assemble, link , load assembly language code or c code in dos environment or windows environment? shouldn't result same? after execution done microprocessor, not operating system. learning assembly language old book of ms-dos era. setback? isn't assembly language , code execution, o/s independent? or matter code written in other languages?

isn't assembly language , code execution, o/s independent? or matter code written in other languages?

yes , no.

yes. machine's language independent of os. doesn't matter if wrote or c compiler wrote you.

no. have use os run software. if want useful, you'll need call os api's. entirely os dependent.


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