圖像來源，BBC Chinese / Lok Lee
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.，更多细节参见爱思助手下载最新版本
，更多细节参见爱思助手下载最新版本
更多对全球市场、跨国公司和中国经济的深度分析与独家洞察，欢迎访问 Barron's巴伦中文网官方网站
// Each component enqueues a small chunk。关于这个话题，搜狗输入法下载提供了深入分析