Re: What pokes the ISA IO port of 0x211 ?

Rene Herman
2008-04-21T20:06:15Z

On 21-04-08 13:12, Frantisek Rysanek wrote:
> Dear Everyone,
>
> I'm dealing with an embedded PC motherboard that contains some custom
> circuitry (GPIO), accessible via an ISA IO range between 0x200 and
> 0x218.
>
> There's an interesting issue with this in recent Linux (tried
> 2.6.22.6 and 2.6.24.2): something probes IO port 0x211 on boot, which
> happens to be an add-on buzzer control port - effectively the kernel
> boot launches an accoustic alarm :-)
>
> Any ideas what this could be?

ISAPnP default read data port is close at 0x213...

I haven't checked but this also reminds me of sensor chips. Do you have
sensor drivers builtin?

Rene.