From: alan@lxorguk.ukuu.org.uk (Alan Cox)
To: linker@z.ml.org (Gregory Maxwell)
Cc: linux-kernel@vger.rutgers.edu, alan@redhat.com
Subject: Re: CMI-8338/Pci SoundPro
Date: Sun, 31 Jan 1999 00:29:51 +0000 (GMT) [thread overview]
Message-ID: <m106kls-0007U2C@the-village.bc.nu> (raw)
In-Reply-To: <Pine.LNX.3.96.990130172312.2763A-100000@z.ml.org> from "Gregory Maxwell" at Jan 30, 99 05:31:30 pm
> Is there currently any work on supporting the CMI8338 PCI sound chip?
Not that I know of.
> The page claims that it has legacy SB16 support via on board ISA DMA
> emulaton (which supposdity works under real dos). I havn't gotten it
> working under Linux yet, but I only spent about 5 seconds trying so far.
The DMA stuff should work. The way the transparent ISA DMA emulation works
is horribly sick but OS independant. PCI bridges output all bus cycles
to the PCI bus first. Unclaimed ones go to the ISA bus. This means a PCI
card can watch ISA DMA being programmed and work out what the user was
trying to do. It then issues its own PCI DMA operations for the same
addresses.
Alan
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next prev parent reply other threads:[~1999-01-30 23:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.3.96.990130172312.2763A-100000@z.ml.org>
1999-01-31 0:19 ` Gregory Maxwell
1999-01-31 0:29 ` Alan Cox [this message]
1999-01-31 0:44 ` Simon Weijgers
1999-01-31 7:15 ` Gregory Maxwell
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