Message board for the users of flat assembler.
> OS Construction > Why don't modern OSes use Ring1 and/or Ring2?
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Problem is, it doesn't. There are parts that aren't 100% emulated yet, and are very hard to trap... sorry that I can't divulge more than that, but it would be against commercial interest *grin*. VMX and the extensions are a good step, though.
Well, we also have Virtualization to thank. AMD Pacifica and Intel VT instruction sets mean that you can if you so desire, completely isolate different execution environments.
|24 May 2008, 04:07||
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