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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:。体育直播是该领域的重要参考
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This document outlines the architectural and design decisions that went into the evaluation model of the initial Sabela prototype. The central architectural decision Sabela makes is to evaluate input in a GHCi subprocess rather than implementing a REPL via GHC API and HIE Bios.
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