From: Jeff Garzik <jgarzik@mandrakesoft.com>
To: root@chaos.analogic.com
Cc: Greg Hosler <hosler@lugs.org.sg>, linux-kernel@vger.kernel.org
Subject: Re: AC'97 (VT82C686A) & IRQ reassignment (I/O APIC)
Date: Mon, 30 Apr 2001 12:38:36 -0400 [thread overview]
Message-ID: <3AED950C.962360AF@mandrakesoft.com> (raw)
In-Reply-To: <Pine.LNX.3.95.1010430113545.13070A-100000@chaos.analogic.com>
"Richard B. Johnson" wrote:
> Observe that the PCI DWORD (long) register at DWORD offset 15 consists
> of 4 byte-wide registers (from the PCI specification), Max_lat, Min_Gnt,
> Interrupt pin, and interrupt line. Nothing has to fit into 4 bits, you
> have 8 bits. I haven't looked at the Linux code, but if it provides only 4
> bits for the IRQ, it's broken.
Non-IO-APIC Via audio hardware only decodes the lower 4 bits of the IRQ.
--
Jeff Garzik | Game called on account of naked chick
Building 1024 |
MandrakeSoft |
next prev parent reply other threads:[~2001-04-30 16:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-30 15:38 AC'97 (VT82C686A) & IRQ reassignment (I/O APIC) Greg Hosler
2001-04-30 15:41 ` Richard B. Johnson
2001-04-30 16:38 ` Jeff Garzik [this message]
2001-04-30 17:32 ` Richard B. Johnson
2001-04-30 18:19 ` Adrian Cox
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