[3911] in linux-net channel archive
Re: Serial Port IRQ woes
daemon@ATHENA.MIT.EDU (tony@trishul.sci.gu.edu.au)
Tue Jul 30 21:20:58 1996
Date: Wed, 31 Jul 1996 10:27:50 +1000
To: linux-net@vger.rutgers.edu
From: tony@trishul.sci.gu.edu.au
Mark F. Burgo" <mfburgo@lrkimball.com> wrote:
> > I need to get 2 modems working on 1 linux box. (I am using 1.2.13
> > currently). I also need my mouse.
> >
> > I have a P100 with built in Com ports, and 1 internal modem.
> > Mouse - /dev/cua0 = IRQ 4
> > Modem 1 = External = /dev/cua1 = IRQ 3
> > Modem 2 = Internal = /dev/cua3 = IRQ ?3
> >
> >
> > The problem is getting the internal modem recognized on IRQ 5 or 7 -
> > I have edited rc.serial, and changed the jumpers on the modem, but
> > Linux refuses to talk to the modem on anything other then IRQ 3
> > (though I did not try as the mouse needs it).
> I was able to configure my Sportster by editing the serial.c source
> for the kernel and modifing the interrupt. After re-compiling the
> kernel all worked well.
Really ugly... especially since you can alter the irq from userspace,
and "automatically" from the rc bootup scripts.
> However, you need to remember to due this for any kernel upgrades
> you perform.....
Which is the really ugly part.
Use the `setserial' program to inform the kernel of the new irq.
Cheers
Tony
