[2567] in linux-net channel archive
Re: interrupt problem again
daemon@ATHENA.MIT.EDU (dplatt@jumble.3do.com)
Wed Apr 17 15:23:20 1996
From: dplatt@jumble.3do.com
Date: Wed, 17 Apr 96 11:02:52 PDT
To: sen@math.msu.edu, linux-net@vger.rutgers.edu
In-Reply-To: <199604162219.SAA09405@chaos>
> I still have many problems trying to set up a PCI ethernet card in my linux box
> with an Adaptec 2940 SCSI card. I have tried both the 3COM 590 and the
> SMC 8432.
>
> I seems that both the Adaptec 2940 and the ethernet card want IRQ
> 10. The boot sequence reports that both get IRQ 10, and then when I try
> to ifconfig up the ethernet card, it complains with a 'SIOCFLAGS try
> again' or something.
>
> This does not occur with ISA cards. What can I do about it?
Check your motherboard manual for instructions on how to set up the
mapping between the PCI INT lines (usually INTA) and the ISA IRQs.
Some motherboards arbitrarily designate a specific IRQ for each PCI
slot's INTA line. Some motherboards have a one-to-one mapping between
the PCI INT lines and specific IRQs (e.g. INTA becomes IRQ10, INTB
becomes IRQ11, etc.). Some allow you to route the PCI INTA (e.g.) line
to a specific IRQ for each slot using a jumper. Most (I think) allow
you to specify the INT->IRQ routing for each slot by means of a menu
in one of the hardware-setup screens.
Figure out which slot each card is in, figure out which ISA IRQ
numbers you want to use for each, figure out which PCI INT signal each
card generates, and then configure your motherboard appropriately.
Dave Platt dplatt@3do.com | Moderator of
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