On Mon, Jan 20, 2003 at 11:15:18AM -0800, Ian Romanick wrote:
> >But that is not reason for not supporting it or something, who knows,
> >Creative and 3Dlabs may release a consumer board supporting those next
> >year, and there will be lot of those around.
> 
> Right, but without documentation, it's hard to know what we would need 
> to do to support it or what we would need to NOT do to prevent 
> supporting it.

Sure, altough i believe it just does in hardware some of the things you
plan to do in software, so there should be some way to let the hardware
manage the buffers and the swapping of memory and other such instead of
doing it in software.

> >And you don't think other manufacturer may develop their own technology
> >doing this ? virtual memory is hardly that inovative that a patent can
> >block ATI or NVidia from developping a similar issue, after all it is
> >used since years in CPUs.
> 
> Not to get into too much of a tangent, virtual memory is not novel. 

So there should be not much surprise about what this new feature does,
altough the pm3 is more than 3 years old, i think. Simply think of the
feature as what a CPU can do with regard to virtual memory.

> >Mmm, i know of at least 3 persons who have the docs for the pm3 apart
> >from me, sure, you need to sign an NDA, but who does not these days, i
> >also have the hardware for it, and am planning to do DRI work for those
> >in the future, and one of those 3 persons has expressed interrest on
> >having DRI enabled for the pm3, and i did begin some work for the gamma
> >+ pm3 combo.
> 
> Your input would be very helpful, then.  Is there any chance you could 
> port the gamma driver to use the texmem interface in the texmem-0-0-1 
> branch? :) That's one of the few drivers that I had given up hope on 
> seeing ported.  The other is the tdfx driver.

Well, i could do it, but ...

The current gamma driver was designed back then with the GMX2000 in
mind, which use a gamma and one or two MX rasterizers. I have an Appian
Jeronimo 2000, with a a gamma and two pm3 chips, each rasterizing for
one head. Before porting it to the new texmeme branch, i need to port it
for my board, which i have tried to do, but didn't find enough time for
it ;(((

> >That said, sure, there is not really all that much i can contribute to
> >this discution, since i am under NDA, but, well, virtual memory for
> >graphic chips work all the same as virtual memory for CPUs so i guess it
> >is easy to take those things into account also.
> 
> Fair enough.  You'll have to be careful. :)

Yes, ...

Friendly,

Sven Luther


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