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Date:      Thu, 19 Nov 1998 10:09:10 -0700
From:      Nate Williams <nate@mt.sri.com>
To:        Joao Carlos Mendes Luis <jonny@jonny.eng.br>
Cc:        nate@mt.sri.com (Nate Williams), roger@cs.strath.ac.uk, mobile@FreeBSD.ORG
Subject:   Re: strange behavious of two PCMCIA modem cards
Message-ID:  <199811191709.KAA05146@mt.sri.com>
In-Reply-To: <199811191706.PAA23317@roma.coe.ufrj.br>
References:  <199811191624.JAA04828@mt.sri.com> <199811191706.PAA23317@roma.coe.ufrj.br>

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> // > // Actually, the interrupts and the I/O ports the card's claim to use are
> // > // completely irrelevant since the PCIC controller can map them to be
> // > // anywhere.
> // > 
> // > I could not change my ethernet card irq from its default 5.  Do you
> // > have another explanation for that ?  I'm running 3.0, could it be the
> // > problem you said above ?
> // 
> // Are you sure the other interrupts you tried were not already taken by
> // some part of the system?  Again, electrically speaking the card has no
> // idea what IRQ was assigned to it, it just gets the interrupt that the
> // PCIC controller passes to it.
> 
> Humm...  Now that you said this I went again and tried with other
> interrupts.  It requests irq 5, and work with both irq 5 and irq 9,
> but it does not work with irq 11.  AFAIK, there's nothing at irq 11 in
> my notebook (Toshiba CDS305).  And, IIRC, I used this interrupt before
> with a SlimSCSI card.

I'll bet it didn't work very well.  IRQ 11 seems to be used by a number
of 'internal' functions in laptops for some reason.  On my ThinkPad,
it's used for *something*, but I have no idea what.

> How can I find which irqs are in use ?

You can't, really.  Welcome to the world of PC's. :(




Nate

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