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xio2001 interrupt pin 这个寄存器怎么修改

Other Parts Discussed in Thread: XIO2001

xio2001通过主板的PCIe直接连接扩的PCI总线,pci总线用DMA方式传输没什么问题。但是如果主板PCIe通过一个PCIE SWITCH 再接到XIO2001上,这样接转出的PCI总线DMA方式不能用,普通方式可以。请问一下interrupt pin这个寄存器用eep配置能改吗,由于这个寄存器默认是00,系统不分配中断号,请问怎么能配置一下