指示器的指示字还包含一个值，当相应行不在存贮器中时，它引起硬设备或软设备中断。
The pointer to a row can contain some value which causes a hardware or software interrupt in case the row is not in memory.
指示器的指示字还包含一个值，当相应行不在存贮器中时，它引起硬设备或软设备中断。
The pointer to a row can contain some value which causes a hardware or software interrupt in case the row is not in memory.
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