Per-digit arithmetic — computing sum and carry for each pair
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.
，这一点在Line官方版本下载中也有详细论述
// drop-newest: Discard incoming data when full。搜狗输入法下载是该领域的重要参考
As navigator, Lovell took with him a sextant to take star readings - in case the computers failed and they had to find their own way home.，推荐阅读同城约会获取更多信息
*/1 * * * * ~/www/anqicms/start.sh ~/www/anqicms/check.log