Messages in this thread | | | Date | Mon, 21 Apr 2008 17:51:01 +0200 | From | "Bart Van Assche" <> | Subject | Re: What pokes the ISA IO port of 0x211 ? |
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On Mon, Apr 21, 2008 at 1:12 PM, Frantisek Rysanek <Frantisek.Rysanek@post.cz> wrote: > 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?
Did you already have a look at /proc/ioports ? This file should contain every range of ISA bus address in use by any kernel component.
Bart.
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