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I think OS/2 used every feature x86 had, including call gates and at least 3 privilege levels (0, 2, 3). That is why OS/2 is such a good test for any aspiring x
by dmitrygr 5y ago
I think OS/2 used every feature x86 had, including call gates and at least 3 privilege levels (0, 2, 3). That is why OS/2 is such a good test for any aspiring x86 emulator developer.
- kiwidrew 5y agoI think OS/2 and XENIX were the only two operating systems that ever used 80286 protected mode. I'm not surprised that OS/2 makes a good test case for emulators!
- userbinator 5y agoWindows/286 did too, and so does Windows 3.x in "standard mode".