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Originally Posted by ntwizard
I really don't so..
Jeff Richter the author of many Windows 32 programming manuals taught me this in the Advanced Windows Hardware Architecture classes I took while I was working at Intel...
It is also in Helen Custer's Inside Windows NT..
Since Windows NT still has compatability with OS/2, all three rings would be used..
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Windows NT has limited compatibility with OS/2 (16 bit app only, no any privileged code like IOPL modules/dlls). OS/2 subsystem run only in Ring-3 like
VDM (DOS)