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.
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Flow 进一步强化了「图像与视频一起完成」的工作思路，支持将素材分组整理和修改；编辑方式也更偏自然语言，新增套索工具可圈选图像区域后用文字指令进行局部修改，也支持直接在图上标注来辅助改动。