The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.
小米高管称手机成本已成“鬼故事”，存储涨价触发行业正反馈循环
，这一点在heLLoword翻译官方下载中也有详细论述
if (PLAYER_1.DPAD.up) moveUp();。51吃瓜对此有专业解读
What about its value at , though? We can just assign