Driver for a watchdog : how to ?

Hello,

I'm using a motherboard including an hardware watchdog that I want to be
able to control, so that it can restart the server when frozen.
To do that, I have to do some In/out to some ports, which is not permitted
from Ring3.
I then need to have some Ring0 code, which may be a device driver.
I've been browsing the DDK, but I can't find anything related to this kind
of driver.
Could someone tell me which kind of driver is the best appropriated, and
tell me if a sample or some basic code is available somewhere ?
I've been browsing the samples, but they are mostly based on the fact that
the device can be found thru some enumeration, and this driver is purely
I/O,
not registered on the PCI bus, the USB bus or anything else. You have to
know
it is there to use it, no way to guess...

TIA,
Regards,
Paul

Doron
Wed Mar 03 00:27:28 CST 2004

XP and beyond have built in support for hardware watchdogs. are you sure
the system driver is not already running?

d

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"Paul Rolland" <rol@as2917.net> wrote in message
news:ed1%238XIAEHA.1452@TK2MSFTNGP09.phx.gbl...
> Hello,
>
> I'm using a motherboard including an hardware watchdog that I want to be
> able to control, so that it can restart the server when frozen.
> To do that, I have to do some In/out to some ports, which is not permitted
> from Ring3.
> I then need to have some Ring0 code, which may be a device driver.
> I've been browsing the DDK, but I can't find anything related to this kind
> of driver.
> Could someone tell me which kind of driver is the best appropriated, and
> tell me if a sample or some basic code is available somewhere ?
> I've been browsing the samples, but they are mostly based on the fact that
> the device can be found thru some enumeration, and this driver is purely
> I/O,
> not registered on the PCI bus, the USB bus or anything else. You have to
> know
> it is there to use it, no way to guess...
>
> TIA,
> Regards,
> Paul
>
>
>

Paul
Thu Mar 04 09:50:04 CST 2004

Hi Doron,

"Doron Holan [MS]" <doronh@nospam.microsoft.com> a écrit dans le message de
news:uuWRbiOAEHA.3456@TK2MSFTNGP09.phx.gbl...
> XP and beyond have built in support for hardware watchdogs. are you sure
> the system driver is not already running?
>
Quite sure...
Could you give me more details how this support is present within XP so that
I can
check more carefully on the machine ?

In fact, the watchdog is expected to be talked to every X seconds or the
machine
will reboot...

But, in the Hardware explorer, I can't find it...

Regards,
Paul