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Re: Kernel panics with 1.2.10

daemon@ATHENA.MIT.EDU (John Paul Morrison)
Wed Jul 5 21:10:03 1995

From: John Paul Morrison <jmorriso@ConcordPacific.com>
To: linux-net@vger.rutgers.edu
Date: Wed, 5 Jul 1995 11:59:21 -0700 (PDT)
In-Reply-To: <9507050624.AA13711@rsphy9.anu.edu.au> from "Paul Gortmaker" at Jul 5, 95 04:24:02 pm

> irq 15 (the garbage heap of PIC #2) 
> 
> >eth0: WD80x3 at 0x280,  00 80 48 85 E1 CC assigning address 0xd0000 WD8003-old, IRQ 15, shared memory at 0xd0000-0xd1fff.
> >wd.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)
> 
> Didn't this come up before?  The probe report is showing that you have one
> of the old 8 bit EEPROMless full length 8k RAM cards. But if that was the
> case, you couldn't be using irq 15 on an 8 bit card! Not to mention the

I hope the Linux drivers never make assumptions about possible IRQs 
a card can use. I've often resorted to cutting knife and soldering iron
hardware hacks when I've been short of IRQ lines. 

An old 8 bit card will work fine on IRQ 15 if you cut a trace and run
a wire. (I run the Ottawa PI card on IRQ 10, i've hacked serial cards
to use other free IRQs).

The same could probably be said for DMA lines, although those aren't as
scarce.

> Followups to the net-channel only please.
> 
> Paul.
> 


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