Re: Fwd: radeon YCbCr output

[Aapo T. <ae...@ra...>]

On Sun, 7 Aug 2005 19:30:48 +0100 (BST)
Steven Newbury <s_j...@ya...> wrote:

> I've managed to get my Radeon 8500 to work with YPbPr output under Windows.  I
> did have a bit of trouble finding how to do it again, eventually found this
> thread on avsforum:
> http://www.avsforum.com/avs-vb/showthread.php?t=212199&page=1&pp=20
> 
> The picture quality is incomparable to s-video and the Windows driver only
> supports US HDTV standard output modes, while my TV also supports PAL type HDTV
> modes ie. 576p; hopefully this limitation will be gone if I can get this
> working with Xorg.
> 
> It's worth noting that it does NOT work on all Radeon cards, specifically my
> 9200SE will not work in YPbPr mode.
> 
> --- Alex Deucher <ale...@gm...> wrote:
> 
> > On 8/6/05, Steven Newbury <s_j...@ya...> wrote:
> > > --- Alex Deucher <ale...@gm...> wrote:
> > > 
> > > > Not really.  Ati hasn't released any information about setting up the
> > > > chip for component output.  Perhaps you can dump the radeon registers
> > > > in windows and compare how that driver sets things up, or perhaps the
> > > > fglrx driver supports component out too and you could use the register
> > > > dump tools from the r300 project.
> > > >
> > > Hi again!  I'm going to have a go at getting Windows working with component
> > out
> > > and get a register dump from it.  Do you know where I could find a register
> > > dumper for Windows?  
> > 
> > I don't know off hand.
> > 
> > >Or should I try compiling
> > > http://www.botchco.com/alex/radeon/mergedfb/cvs/DRI/hy0/radeon_dump.tgz
> > under
> > > Cygwin?  Would that work?
> > 
> > I've never tried.  You can give it a shot and see what happens.
> I've got it to compile, however to to open /dev/mem I had to change it to open
> it RDONLY, I don't why that would be, this is a default install of WinXP so my
> user account is running as "Administrator".  I've now come to another problem,
> cygwin/nt5.1 doesn't have a /proc/bus/pci so radeon_dump is segfaulting:
> $ ./radeon_dump
> Unknown card
> radeon_dump: ATI (null)
> BIOS Image start: -------------------
> Segmentation fault (core dumped)
> 
> I'm still looking for a native Win32 Radeon register dumper though I've not yet
> had any luck in that regard.

Only device drivers can access hardware under windows.
Fortunately at least one _working_ HW-library still exists - http://zealsoftstudio.com/memaccess/ .

-- 
Aapo Tahkola