[wdmaudiodev] Re: Windows and PCIe
- From: mikko.helin@xxxxxxxxxx
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Fri, 17 Feb 2006 14:32:24 +0200 (EET)
Tim Roberts kirjoitti 16.02.2006 kello 19:20:
> How would that particular case have been helped? Would you give that
> entire PCI bus a higher priority?
>
Yes, I don't need any other PCI cards, and I'm not going to replace my E-mu
1820m card for a while.
> Wouldn't it be better to argue for a native PCI-Express audio card?
Strange thing is that in the document where MS gives instructions to BIOS
programming for OEM's it's
required that BIOS disables the other than VC0 virtual channels. However,
PCI Express High Definition Audio Controllers, which use class code 04 and
subclass code 03, are exempt from this requirement.
They also say that "hardware vendors are encouraged to work with Microsoft to
define the future direction of extended virtual channel support".
http://www.microsoft.com/whdc/system/bus/PCI/wlp_interrupt.mspx
Is that requirement fair for PCI audio card users? I don't think so.
-Mikko
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