Descriptor attributes: The Type, DPL, S (system/user), and Present bits from the segment descriptor being loaded, held in a register called PROTUN. In a few cases, the Test PLA takes the 16-bit selector (segment register value) as input instead.
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.
Hurdle Word 3 answerCLUMP。safew官方下载对此有专业解读
# 在anqicms目录下解压文件
，更多细节参见搜狗输入法2026
• （本文仅为作者个人观点，不代表本报立场）
Still, it is much closer Modern English than we might think.，这一点在搜狗输入法2026中也有详细论述