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From: Nate Williams <nate@mt.sri.com>
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To: "Sean O'Connell" <sean@stat.Duke.EDU>
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	FreeBSD mobile <freebsd-mobile@FreeBSD.ORG>
Subject: Re: PAO+ep0 slooooow
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> > What windoze uses is irrelevant, because the PCIC and cards can use any
> > available IRQ in the system.
> 
> I have not found this to be the case!  If the hardware is still
> "interrupting" on 10 you are screwed.  It's sort of like a *&^%ing
> winmodem.  Let me restate, not true for pcic ... probably true for
> ep0.

Umm, you *configure* the PCIC controller to interrupt wherever you want
it to.  It's not hard-coded like an ISA card, but completely
programmable.  Just because Windoze chose to program it to IRQ 11
doesn't mean it must be an IRQ 11.

> > > > I had a similar problem with ep0 and an HP Omnibook.  The pcic_irq
> > > > was being set to 3 (even though the hardware wanted to be on 10)
> > 
> > Just because windows used IRQ 10 means nothing.  We can use IRQ 3 w/out
> > any problems.
> 
> On ep0?  Never tried ... I like things to "just work".

Sure.  It should 'just work' assuming there isn't any hardware
hard-wired to a particular IRQ that FreeBSD doesn't know about.

> > > > ep0 just wouldn't work on 10 (due to the pcic listening there). It
> > > > was not until I had pcic on 10 and ep0 on 11 that life was happy.  
> > 
> > It shouldn't have made any difference.  Is it possible that the second
> > serial port was setup on IRQ 3?
> 
> Ooooh or worse yet, an IR port!

Same difference.


Nate


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