Re: PCI reset on soft boot

[Patrick Maupin <pmaupin@jump.net>]

While there is no formal requirement, there _is_
a recommendation.  See:

 http://www.pcisig.com/data/tech/ctrlalt.zip

Pat Maupin

Peter Marek wrote:

> Jeff,
>
> as far as I know there is no such requirement.
>
> Soft resets just activate the KBD-Controller's reset output (through the
> BIOS or DOS). It's a chip set issue how they handle keyboard resets. Some
> just activate a warm reset for the CPU, others perform a hard reset by
> driving the CPU,  PCI and ISA resets active.
> Most machines I have seen do a hard reset.
>
> Regards,
>
> Peter Marek
> General Director
> MarekMicro GmbH
> Kropfersrichter Str. 6-8
> D-92237 Sulzbach-Rosenberg
> Germany
> Phone: 049 - 9661 - 908 - 210
> Fax:      049 - 9661 - 908 - 100
> ----- Original Message -----
> From: Jeff Dahlin <JDahlin@appiangraphics.com>
> To: 'PCI-SIG' <pci-sig@znyx.com>
> Sent: Friday, April 28, 2000 1:58 AM
> Subject: PCI reset on soft boot
>
> > I apologize first for bringing up an OS dependant issue, but I have not
> been
> > able to find this out through other channels.
> >
> > On some PC systems that we are working with we have seen no reset on the
> PCI
> > bus when a soft boot (Ctrl-Alt-Del) occurs.  This tends to wreak havoc
> with
> > our board since our device ends up in an unknown state when the boot ROM
> > executes.
> >
> > Does anyone know of a requirement (PCI or otherwise) for a system to issue
> a
> > reset at times other than power up?
> >
> > Thanks,
> > Jeff Dahlin
> > Senior Project Engineer
> > Appian Graphics
> > jdahlin@appiangraphics.com
> > (425)882-2020