DOSBox won't benefit from it.
After all you can boot msdos 6.22 inside it if you want.
The things that are missing are probably on purpose.
You might want to spend your time informing the people of dosbox about which games don't work instead of claiming that it isn't 100 % compatible without any proof that it has something todo with the DOS emulated by dosbox. (incase you didn't know the DOS emulation is small portion of what dosbox emulates)
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