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by agrover 1114 days ago
I doubt it. This is probably talking about early versions of OS/2, like, pre-2.0.
1 comments

According to https://www.os2world.com/wiki/index.php/Databook_for_OS/2_%E... OS/2 Warp 4 uses Rings 0, 2 and 3.
32-bit Xen also used ring 1.