[Openchrome-users] vt1625 and PAL modes?

Sun Feb 4 11:34:11 PST 2007

Ken,

Can you confirm which SVN revision your patch is meant for. I just
tried the patch w/ 288 and none of the following modes work on an NTSC
TV.

Board =  Via EN12000
TV = Magnovox 27" NTSC

16 bit
720x480Under NTSC
720x480Over NTSC

24 bit
720x480Under NTSC
720x480Over NTSC

The result is a blue screen. Before I go scouring logs I figured I
confirm I am using the correct  SVN revision to patch against.

All,
Without the patch 720x480Under 16bit works mostly ok. It's slightly
jumpy and the right corner of the picture is about 1 inch in from the
corner of the screen

I am eager to help any way I can. I'm still getting up to speed. If
anyone can point me to what to change where, I can try tweaking myself
and then providing my own patch.

Regards,

Sean Decker

On 2/3/07, Ken Huisman <ken_a at billionmonkeys.net> wrote:
> On Fri, 2007-02-02 at 10:25 +0100, Xavier Bachelot wrote:
> > Ken Huisman wrote:
> >
> > > For what it is worth, I am no longer making any changes for VT1625 - the
> > > patch available is probably the last one you will see from me - a couple
> > > months ago I did something to hose my commell board so I don't have a
> > > test platform - it would be nice to submit the patch I have into the
> > > source stream, it is better than what was there before, although not
> > > perfect.
> > >
> > OK, I also think it's time to commit this, so let's summarize.
> >
> > Your patch adds :
> > - 720x480P : this is progressive ? What is this used for ?
>
> this is what was 720x480Under before my changes, which apparently worked
> as a progressive mode resolution, so I renamed it.
>
> > - 720x576Over PAL
> > - 640x480 PAL
> >
> > It also modifies :
> > - 720x480Under NTSC
> > - 720x480Fit NTSC
> > - 720x480Over NTSC
> >
> > > Eventually I may get back to trying to resurrect my commell board (I'm
> > > hoping I just need an OS reinstall), but its use in my home has been
> > > replaced, so the board may just get sold.  Its too bad, I was really
> > > close to getting NTSC 720x480Over working.
> > >
> > Do you think the improvements to this mode worth being committed or not ?
>
> Brace yourself, here is a long tale!
> its a lot closer to working than it was, but it is not usable yet.  I
> think all the VT1625 register settings are correct, but that the
> modeline info in the driver needs to be changed.
> To this email, I'm attaching a newer diff than the one on my website.  I
> don't know the status of this diff (since I don't have any hardware to
> test with), the PAL modes should be exactly the same as before, this
> patch contains some mucking around with the modelines for 720x480Under
> and 720x480Over (plus some more register changes for the latter).  I
> recall getting fairly close to having 720x480Over working (even at 24
> bit color, which was my focus) - If I recall correctly, I got it close
> to looking like what a real overscan mode was supposed to look like, but
> it was a bit more flickery than it should have been, and I hadn't been
> able to figure that out by the time that i busted my commell board.  So
> anyways, what is in the attached diff was a work in progress, but could
> be tested by someone - it might be better than what was in the diff on
> my webpage.  It would be worth trying to fire up this patch in 24 bit
> color on the 480Under and 480Over resolutions and see if they work at
> all, I can't remember exactly how far I got.
>
> >
> > I assume you tested 720x480Under and 720x480Fit NTSC modes to be working
> > fine for you. Am I right ?
>
> I tested these modes, for the patch on my website, Under worked in 16
> bit color and not 24 bit, Fit did not work at all, Over sorta worked at
> 16 bit color, but shifted down a bit.  For the attached patch, it might
> be better.
>
> On another note, if you look at the latest via driver, they got rid of
> the Fit resolutions entirely.  I'm wondering if we should do the same...
> I was also wondering how hard it would be to rip out all the tvout code
> in the openchrome driver and replace it with the tvout code from via's
> driver.  since in history openchrome was a fork off that driver in the
> first place, it might not be too difficult, and, we already know that
> via's driver supports more hardware than openchrome does.  Is it worth
> doing?
>
> > 720x756Over PAL is confirmed to be working by Roy. Hopefully Udo will
> > also confirm.
> >
> > What about 720x480P and 640x480 ?
>
> timmy said he was using the old 720x480Under successfully as a
> progressive scan mode, and that is what the 480P one is, so I assume
> that timmy would be the one who could tell if it still works the same as
> he expects.
>
> the 640x480 PAL and NTSC modes were tested and found to not be working.
>
>
> Hope that helps
>
> Ken
>
> >
> > Regards,
> > Xavier
>
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--- "The obscure we see eventually, the completely apparent takes
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