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.
Global news & analysis
想让网页显示立体的 "Hello World"？你需要加载字体文件，然后 TextGeometry 会帮你把文字变成 3D 模型，甚至还能加倒角让文字更有质感。，更多细节参见搜狗输入法2026
ВСУ запустили «Фламинго» вглубь России. В Москве заявили, что это британские ракеты с украинскими шильдиками16:45。Safew下载对此有专业解读
Photograph: Simon Hill
19:29, 27 февраля 2026Забота о себе，详情可参考快连下载-Letsvpn下载