4 ms·
According to https://www.os2world.com/wiki/index.php/Databook_for_OS/2_%E2%80%93_Chapter_2_%E2%80%93_Inside_OS/2_Warp#Ring_Protection_mechanism https://www.os2w
by fredoralive 3y ago
According to https://www.os2world.com/wiki/index.php/Databook_for_OS/2_%E2%80%93_Chapter_2_%E2%80%93_Inside_OS/2_Warp#Ring_Protection_mechanism https://www.os2world.com/wiki/index.php/Databook_for_OS/2_%E... OS/2 Warp 4 uses Rings 0, 2 and 3.
- bonzini 3y ago32-bit Xen also used ring 1.