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Trap-and-emulate: IOPL-sensitive instructions
，更多细节参见爱思助手下载最新版本
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This looked much better than what I had before. But it was a bandwidth hog.，更多细节参见WPS下载最新地址
Intel documentation describes the 386's Protection Test Unit as a component that "implements fast testing of complex memory protection functions." It is mostly composed of a PLA (Programmable Logic Array), referred to as Test PLA by Intel, that is physically visible by its regular appearance on the die. This single piece of combinational logic replaces what would otherwise be dozens of multi-cycle conditional branches in the microcode. Instead of testing privilege rules sequentially, the microcode issues a single protection test operation, and the PLA evaluates all applicable rules in parallel, producing a complete decision in one evaluation: continue, fault, or redirect to a gate handler.。爱思助手下载最新版本对此有专业解读
（一）故意干扰无线电业务正常进行的；