[Openchrome-users] VT1625 PAL Modes

[Sandeman]

Re: VT1625 PAL Modes
Hi Ken,

Thanks for the info. I also found some usefull information on the TV Out page of Terry Barnaby (http://www.kingcot.eclipse.co.uk/unichrome/unichromeTvOut.html). He wrote a small program to control the registers of the vt1622 which can be downloaded from his page.

I'll try you patch soon. I also have very little time, unfortunatly.

Greetings,

Sander.

> Hi there,
> 
> You are partially correct that you can get some help from the via
> driver.  I did this to get the patch for the 720x480 resolution
> partially working.
> 
> I did also try to write a program that would read/write the register
> values, but I2C is a huge pain and it never worked (in spite of the fact
> that i basically just re-used code from X).  I've attached the program
> as a starting point - if you get something working I would sure like to
> see it, I don't have much time to work on this stuff.
> 
> Also I've attached my latest attempt at a patch (its a diff off of the
> latest svn).  I saw people complaining on the mailing list about no PAL
> modes so I tried to add 720x576Over but I cannot test it.  I tested one
> of the NTSC resolutions on this patch and it did not work, I suspect the
> changes I made to the modelines are wrong, I'm not sure I understand
> exactly what the pixel clock is set to in the via driver for these
> various resolutions, and how that stuff should translate.
> 
> hope that helps.
> 
> cheers,
> 
> Ken
> 
> 
> On Tue, 2006-24-10 at 13:15 +0200, Sandeman wrote:
> > Re: VT1625 PAL Modes
> > Hi Alistair,
> > 
> > I think there is a big chance that all information we need is in tbl1625.h from the VIA driver source. I also think the translation to the tables in the Openchrome header file is not that difficult (but I could be overlooking something of course).
> > 
> > I will investigate this further. As an experiment I'll write a small program which just writes the values to the VT1625 registers and see what happens. I'll keep you informed. 
> > 
> > Greetings,
> > 
> > Sander.
> > 
> > > Hi Sander,
> > > 
> > > I haven't tried the via drivers, I heard they were pretty crappy! I
> > > think i read that they're for XFree rather than X.org too, but I could
> > > be wrong.  I did download the source and have a bit of a peek.  Looks
> > > like the tbl1625.h header may have what we need, but I've no idea how
> > > you'd go about translating that into entries for VT1625Table.  Anyone
> > > know if this is possible?
> > > 
> > > As I said I'm out my depth here but if someone who knows what they're
> > > doing could help I'm happy to try out patches.  As long as they don't
> > > blow up my telly :)
> > > 
> > > Cheers,
> > > Alistair 
> > 
> > ----
> > 
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> > 
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