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.
Thanks for reading! 🙏🏻
。夫子是该领域的重要参考
接棒者的挑战虽然刘建军行长奠定了一份坚实的家底，但邮储银行未来的难题仍不少，也是接棒者面临的考验。
Towerborne launched on Steam, Xbox, and PS5 on February 26, 2026.