From the point of view of the device, say the floppy disk controller, it will see only the address space that its control registers are in (ISA), and not the system memory.

 
  • 從設備的角度來(lái)看,比如說(shuō)軟盤(pán)控制器,它只能看到在ISA總線(xiàn)上的控制寄存器而不是系統內存。
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