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A comment on The 640K memory limit of MS-DOS. Parent comment

Re:The 640K memory limit of MS-DOS by wolfgke on Sunday June 10, 2018 @07:47AM (#17277665)
> On a 286 you do not have access to real mode when in protected mode. You need a 386 for that.

I think that you are mistaken: I am rather sure that the undocumented LOADALL instruction could make something like that possible:

> https://en.wikipedia.org/wiki/LOADALL

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Re:The 640K memory limit of MS-DOS by wolfgke on Sunday June 10, 2018 @02:01PM (#17279309)
Update: Indeed it is possible to use LOADALL to switch from protected mode to real mode:

> http://www.os2museum.com/wp/loadall-strikes-again/

Article found via https://retrocomputing.stackexchange.com/a/220/4889

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Re:The 640K memory limit of MS-DOS by yuhong on Friday June 15, 2018 @09:09PM (#17325148)
No it is not, the article was later corrected.
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Re:The 640K memory limit of MS-DOS by yuhong on Saturday June 16, 2018 @02:31AM (#17326207)
Correct link BTW: http://www.os2museum.com/wp/will-the-real-real-mode-please-s...
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