Subject: Re: 4-port TULIP card and IRQ troubles
To: Chris Jones <>
From: Todd Whitesel <>
List: port-i386
Date: 11/21/1998 03:12:32
> The docs that came with the card said I needed to make sure that that
> PCI slot was set to use "INT A", whatever that means.  I saw nothing
> in my BIOS setup utility (Award Modular BIOS) that looked like it
> would do this.

Somewhere in your motherboard docs or in the BIOS setup they should mention
which slots are bound to which INT lines (the slots have four: A, B, C, D).

My trusty old Iwill PPro motherboard had a little one-page section at the
very end which talked about this. In the Iwill P6NS's case, two of the PCI
slots are bound to INT A, because the onboard 2940UW hogs INT B.

This is both good and bad. Fortunately it saved my ass one weekend when I
added a second Adaptec card, and any time the BIOS decided to make either
of the Adaptecs share an interrupt with something else, win95 went off to
pasture midway through boot. The solution was to force my 21140 TULIP board
and Matrox Millenium II to share INT A, thus forcing the BIOS to give them
the same irq number, leaving enough free for the Adaptecs to be alone.

(Of course, this was only a problem because my SB16 refuses to turn off its
IDE port which I'm not using, and Win95 refuses to let me disable the primary
motherboard IDE port which I'm not using either... sigh)

Todd Whitesel
toddpw @