高手请进，关于irq的问题

   atapi的irq是否可以通过，遍历pci设备得到？
   如果不可以，对于x86平台是不是一个确定的值。

Under NT4, atapi source is provided in DDK sample source.
src/storage/miniport/atapi, refer to it.

Under W2K, IRQ is always provided when HwScsiFindAdapter is called.

Indeed, atapi only handle onboard IDE controller, so its IRQ is fixed, which is 14 for primary and 15 for secondary channel.