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by Someone1234
4256 days ago
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Indeed, but it isn't a "ring." A protection ring has a specific meaning and that meaning IS about "low level [CPU] stuff." For example the CPU can be made to support more than two rings, Windows NT and UNIX just only utilise two of them and then build software protections on top (OS/2 supported 3). https://en.wikipedia.org/wiki/Protection_ring |
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