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:
When is Stuff Your Kindle Day? The Sapphic Shelf Explosion takes place on Feb. 26.
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Фото: Артем Соболев / Коммерсантъ
The BBC visited the skating rink in Virginia where the ‘Quad God’ trains, as his closest friends and teammates expected to watch him win gold.
智能涌现：成为宇树“核心生态合作伙伴”意味着什么？