Re: [Alsa-user] a Windows (tm) utility to read the state of soundcard registers ?

[Lee R. <rlr...@jo...>]

On Wed, 2005-10-12 at 18:11 +0200, Takashi Iwai wrote:
> At Wed, 12 Oct 2005 12:08:43 -0400,
> Lee Revell wrote:
> > 
> > On Wed, 2005-10-12 at 18:07 +0200, Takashi Iwai wrote:
> > > At Wed, 12 Oct 2005 11:49:04 -0400,
> > > Lee Revell wrote:
> > > > 
> > > > On Wed, 2005-10-12 at 15:23 +0200, Sergei Steshenko wrote:
> > > > > Extending the topic - is it possible to easily trace register writes
> > > > > by Windows drivers ? I mean, register writes performed by the
> > > > > soundcard drivers during initialization and operation ? 
> > > > 
> > > > Actually it's easy with a Windows kernel debugger like SoftICE.  Just
> > > > figure out the PCI BARs and set some IO breakpoints.
> > > 
> > > Hmm, good to know.  How about the memory mapped IOs?
> > > 
> > 
> > That's a much harder problem... how common is MMIO for sound hardware?
> 
> Quite a lot.  For example, all the recent Intel mobos use MMIO-based
> access.

Actually this might be easy - IIRC SoftICE can set breakpoints that
trigger when a memory location is written to.  I've never tried it.

Lee