| 术语 | bus-polling protocol |
| 释义 | bus-polling protocol 总线查询协议 In some systems, the bus protocol which allows for a vectored interrupt by the device. Hence, device polling is not required in interrupt processing routines. This results in a considerable savings in processing time when many devices requiring interrupt service are interfaced along the bus. When an interrupting device receives an interrupt grant signal, the device passes an interrupt vector to the processor. The vector points to two addresses which contain a new processor status word and the starting address of the interrupt service routine for the particular device. 在一些计算机系统中,允许设备向量中断的一种协议。因此,中断处理程序中不再需要 设备查询,从而在许多设备申请占用总线完成中断服务时,节省了大量的处理时间。当某个 要求中断的设备接收到中断允许信号时,该设备就向处理器送出一个中断向量,这个向量指 向两个地址:一个新的处理机状态字和与该设备有关的中断服务程序的起始地址。 |
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