Re: [stella] Thomas Jentzsch's PAL -> NTSC Conversions

Subject: Re: [stella] Thomas Jentzsch's PAL -> NTSC Conversions
From: Chris Wilkson <ecwilkso@xxxxxxx>
Date: Thu, 7 Feb 2002 13:04:22 -0500 (EST)
As the resident video ummm...."expert"...(chokes on soda),  I'll take
a stab at it.  If someone will send me the VSYNC portion of the
code from one of these games, I'll try to figure out what they're
doing wrong.


On Thu, 7 Feb 2002, Eckhard Stolberg wrote:

> > > I don't suppose anyone knows that scanlines on Gas Hog or Solaris, do
> they?
> > >
> > > For some strange reason my copies flip like PAL carts and I didn't think
> > > that these were made for PAL
> >
> > NTSC Gas Hog does 261/262 lines and Solaris does 262 (tested with z26 +
> ALT-9).
> > And both games exist as PAL versions too.
> I've said it before, and I'll say it again. A game need to do
> three complete uninterrupted lines of VSYNC to work properly
> on all TVs. Some games try to use this time to do some other
> setup work (Solaris and Desert Falcon are known offenders in
> this respect) and this seems to to cause problems on some TVs.
> I don't have an electronical explanation for this though. Maybe
> one of the harware experts here has?
> If your TV still has a vertical hold knob, you might be able
> to tune it a little bit to sync your TV to these problematical
> games, without messing it up for the normal games.
> Ciao, Eckhard Stolberg
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