caching - are ms-dos api calls hard coded into exe? -

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if remember correctly, when dos loads programm, programm gets use of processor, i.e. dos doesn't in meantime, somehow doesnt figure me, i.e. api calls still have evaluated. api calls hard coded programm when asm file assembled , linked? reason want know this, need know weather cache free exe, experiment cache optimization.

you remember right, dos single-tasked operating system. when program runs, gets full control on processor.

the dos api calls made through int 21 interrupt. when call api function, registers loaded appropriate parameters , int 21 interrupt invoked. control gets operating system, processes request , passes control application.

the parameter setup , interrupt call mentioned linked in executable statically, no dynamic loaded libraries.


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