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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2月28日，比特币快速下挫1000美元，日内跌2.5%，现报64400美元。（每经网）原文链接下一篇AWS与OpenAI联合开发“有状态运行时环境”，预计数月内推出当地时间2月27日，亚马逊网络服务公司（AWS）表示，正在与OpenAI联合开发一种“有状态运行时环境”（Stateful Runtime Environment），该环境将允许AI智能体保留上下文语境并访问计算资源等。其预计将在未来几个月内推出。（界面）