ok! thanks about all replys!
maybe i can explain our question in detail. in fact i want to control a
power device to turn off when i issue a “out” or “WRITE_PORT_UCHAR” command to our power device,then
our power device turn off and pc turn off too…it is well-known when
system is not “it is safe for you to turn off your computer” state,it
will start a famous “scandisk” command show system have a abnormal shutdown action…so i asked “Is there any active driver
when system show ‘it is safe for you to turn off your computer’”.
welcome any cules yet!
thanks all ppl ! 
Anbo Peng
----- Original Message -----
From: “Gary Little”
To: “NT Developers Interest List”
Sent: Friday, September 21, 2001 1:17 AM
Subject: [ntdev] Re:Is there any active drivers when system show “it i s safe to shut down”
> Sure it can, but the question is what causes those commands to run? Do we
> assign sentience to the machine so that IT decides “Ok let’s wake up now!”
> And you’re code will only work on an x86 with a device on that port range
> that will rip a reset back into the CPU, causing it to RESET. You can also
> do the same thing in real mode by simply jumping to F000:FFF0. On an x86.
> That won’t work on a Motorola processor, and maybe not on the I64.
>
> The original poster wanted to know if any drivers are running when Windows
> pops up and tells you it is safe to turn off your computer. But he never
> stated why he is concerned that Windows might be lying to him.
>
> Gary G. Little
> Staff Engineer
> Broadband Storage, Inc.
> xxxxx@broadstor.com
>
> But a processor can be reset by issuing simple commands:
>
> mov al,0FEh
> out 64h,al
>
>
> Best regards,
> Konstantin mailto:xxxxx@infpres.com
>
>
>
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