The tradeoff is complexity. The microcode must be carefully arranged so that the instructions in delay slots are either useful setup for both paths, or at least harmless if the redirect fires. Not every case is as clean as RETF. When a PLA redirect interrupts an LCALL, the return address is already pushed onto the microcode call stack (yes, the 386 has a microcode call stack) -- the redirected code must account for this stale entry. When multiple protection tests overlap, or when a redirect fires during a delay slot of another jump, the control flow becomes hard to reason about. During the FPGA core implementation, protection delay slot interactions were consistently the most difficult bugs to track down.
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微软表示，一块 120mm 见方、2mm 厚的硅酸硼玻璃可存储约 4.8TB 数据，相当于约 200 万本印刷书籍的内容。团队在加速老化实验中推算，在 290℃ 条件下数据可保存 1 万年以上，而在室温下寿命将更长。
My partner and I worked together to design and assemble my desk from T-slot aluminum extrusions. T-slot is amazing. It’s like Erector Set for adults, but nonproprietary and with more options. This allowed me to experiment and iterate and tweak things until the desk fit me perfectly. Aluminum extrusions make it super easy to mount virtually everything, from monitors to keyboards to cup holders. The shelves are finished plywood.