The 386 supports four privilege rings (0 through 3), though in practice nearly all operating systems use just two: ring 0 for the kernel and ring 3 for user programs. Three privilege levels interact on every segment access: CPL (Current Privilege Level), DPL (Descriptor Privilege Level), and RPL (Requested Privilege Level).
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那么原本的触摸操作特长的PS Vita以及TV版的主要功能都极有可能集成到新型PSP上，而且也很可行且实用。
cat access.log | grep "error" | sort | uniq -c