From: chand@nyx.cs.du.edu (Chris Hand) Subject: Modems and IRQ's (again) Date: Wed, 28 Oct 1992 01:10:33 GMT
I had modem problems -- turned out I had 2 cards using the same
IRQ. Funny thing is under DOS and Windows I had no problems...
So it looks like serial.c in the kernel code *assumes* that
COM1/COM3 are on IRQ4 and COM2/COM4 on IRQ 3. I've now got
the modem set to COM3/IRQ5 but at startup I'm told
that COM3 is IRQ4.
Obviously I could patch the kernel (anywhere else apart from
serial.c??), but this is no good if I need to swap again
(I regularly swap jumpers and strip the PC down...:-).
Is there some way we can have an /etc/irqinit or something
that we can use to specifiy what devices are using which IRQ
lines? I have a MIDI i/f and a scanner board in there and I can see
more problems in the future.
Chris cph@dmu.ac.uk
(if I should be addressing this to some mailing list somewhere please
let me know!)