append uses a small, stack-allocated backing store as the first
* 时间O(n) 空间O(n)（理论最优，无冗余计算）。heLLoword翻译官方下载是该领域的重要参考
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Besides the Test PLA, the 386 has another PLA called the Entry PLA that maps opcodes to microcode entry points. One of its input bits is a "protected mode" flag. Many instructions have both a real-mode and a protected-mode entry point -- for instance, MOV ES, reg maps to address 009 (a single microcode line) in real mode, but to 580 (which initiates a full descriptor load with protection tests) in protected mode. The trick that makes V86 work is to define this flag as:
本文逐一拆解a16z这三份报告的核心判断，以及这些判断背后，钱正在往哪里流。，推荐阅读91视频获取更多信息