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.
The rocket has now been taken from the launchpad to the Vehicle Assembly Building at the Kennedy Space Center in Florida where it will be repaired.
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Мерц резко сменил риторику во время встречи в Китае09:25