From: gero@gkminix.han.de (Gero Kuhlmann) Subject: Re: Conflicting IRQs Date: Fri, 8 Jan 1993 12:10:48 GMT
William T. O Connell (wto@cbnewsg.cb.att.com) wrote:
> There have been posts in the past that discuss how to handle situations
> like this when two devices are used simultaneously which have the same IRQ.
> e.g.)
Try to get the postings from an archive. Some of them explain it quite well
how to use interrupts and interrupt sharing.
> So I thought I would simply change the IRQ on the modem from 4 to 5. e.g)
> /dev/ttys0, Type: 16450, Line: 0, Port: 0x03f8, IRQ: 4 # Mouse
> /dev/ttys2, Type: 16450, Line: 2, Port: 0x03e8, IRQ: 5 # Modem
Managing interrupts means managing the hardware! It is not that simple as
to tell the software to use another interrupt. You have to change the
interrupt assignment on the boards first. Therefore it wouldn't help to
tell the kernel to use IRQ5 or IRQ10 (as you mentioned) unless you
really connect the serial board to exactly that interrupt.
gero.
-- Gero Kuhlmann Zerberus: G.KUHLMANN@A-LINK-H.ZER Donarweg 4 SubNet: gero@gkminix.sub.org D-3000 Hannover 51 IN: gero@gkminix.han.de