Re: OpenGL problems on an Ultra/2 with Creator3D
On Fri, Nov 28, 2003 at 08:05:54PM -0500, David Butts wrote:
> Hello, folks-
>
> I recently got my hands on a Creator3D, and, although I've got X up and
> running (apparently) cheerfully, almost none of the OpenGL apps I've tried
> are working.
[Creator3D configuration snipped]
> I get 400+ fps in glxgears, which leads me to believe that, at least
> fundamentally, DRM and DRI are happy. The GL xlock modes seem happy as
> well (though 'molecule' is currently taking a somewhat suspicious 100%
> of the time on one of the CPUs).
>
> Everything else I've tried (e.g. tuxracer, openuniverse, and armagetron)
> mangles colors, or textures, or something. It's a little hard for me to
> tell what exactly, since I don't have a frame of reference.
The Creator3D hardware doesn't do texture mapping, so anything that requests
textures will fall back to a software renderer. That's probably what you're
seeing. (At the time it was designed fast triangles seemed more imporant.)
> The closest thing I've seen to this in the list archives is the 'Ultra1
> Creator quirks' thread from July and August of '01, but I don't have (or
> just haven't noticed) any problems with glxgears.
>
> Is there something that needs to be done with my kernel or X (or some
> other) config, or am I just looking at the limits of the 15MiB of RAM
> the card is purported to have[1]?
It really does have 15MiB: The 3DRAMs are essentially 16Mib DRAMS with 6Mib
worth of area turned into pixel-writing logic. So 10Mib of RAM * 12 chips
is 15MiB total. It's organized into 5MiB each for buffer A, buffer B, and Z.
Jon Leonard
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