Is there any example of using int 15h,ax=e820h?

Hi,everybody
I'm now trying to get my machine's memory map under 1MB space using int
15h ax=e820h,but haven't succeeded till now.

Can somebody give me an example of using int 15h,ax=e820h?If it is run
under DOS or windows,that is better.Sorry,I don't know if it could run
under DOS or windows.

Or is there any other suggestions on how to solve this problem?

Thanks in advance!

regards

.

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