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using dos int21 in windows?

hayder_yousifhayder_yousif Posts: 5Member
can u tell me how to use some of the dos int21 subfunctions in windows because they generate errors???
and some of the dos viruses uses thos functions to check themselfs on the machine ect.

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  • mr_orchemr_orche Posts: 12Member
    : can u tell me how to use some of the dos int21 subfunctions in windows because they generate errors???
    : and some of the dos viruses uses thos functions to check themselfs on the machine ect.
    :

    dos function (int 21) cannot be used in windows environment. if you want, you need to run dos in simulated mode, just run Comamnd.com from Windows. You'll be able to run all dos command here.
    When u're in windows environment (without command.com), you can't use any of int 21 functions, because all of dos' memory was mapped to somewhere location. when you access memory location 0:0020h for example, you'll not actually access it.


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