For segments, the job is split between hardware and microcode. When LD_DESCRIPTOR fires its protection test at 5CD, the Test PLA OR's the A-bit (bit 8 of the descriptor high DWORD) into a temporary register called PROTUN. Then the microcode at PROT_TESTS_PASSED takes over and writes the modified value back to the GDT or LDT in memory:
What's newI used to recommend the M4 MacBook Pro as a cheaper alternative to the M5 model, but as of February 2026, it's no longer available in new condition at any third-party retailers. (The Apple Store discontinued it right when the M5 MacBook Pro came out.) As such, I've removed all mentions of it from this guide.
。业内人士推荐新收录的资料作为进阶阅读
Honor Robot phone and its humanoid friend。关于这个话题，新收录的资料提供了深入分析
“Speculative markets are gambling, right?” David Warrick, executive vice president of supply-chain risk management firm Overhaul, told Fortune. “They basically look at it and say, ‘Is it going to be red or black?’ And they obviously saw an opportunity whereby, ‘If this goes the way we think it might go, the money that we could make is tremendous.’”。新收录的资料是该领域的重要参考