Re: Wakeup from a PCI device

[klaus@efficient.com (Klaus Fosmark)]

Bruce,

>     Many of you may recall a thread back in April talking about how a PCI 
>     device could initiate a wakeup for a powered down system. The proposal 
>     that I had made as a part of the initial work I did on PCI Power 
>     Management defined the standard INTx# signals as the mechanism to 
>     accomplish this. After much discussion and working through as many of 
>     the technical issues as we could, the PCI Power Management Working 
>     Group has decided to request that a reserved pin be assigned for this 
>     purpose. While the technical details are quite involved, the overall 
>     reason is that we decided that we did not want to eliminate the 
>     possibility of a device in a powered-down slot initiating a wakeup and 
>     the only electrically feasible way to do this while maintaining 
>     compatibility with older PCI cards is to use a new pin. 
     
Could you please elaborate on the reason why INTx# would not work?

/Klaus
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