in real address mode visit 4g memory, the understanding of the underlying operating system help

Packet : 198548144gb_mem_access.rar filelist
4GMEM
4GMEM\4GMEM.C
4GMEM\4GMEM.DSK
4GMEM\4GMEM.EXE
4GMEM\4GMEM.PRJ
4GMEM\Herosoft.DSM

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