Re: [stella] Gravity Ball v015 - Thanks!

Subject: Re: [stella] Gravity Ball v015 - Thanks!
From: "Eckhard Stolberg" <Eckhard_Stolberg@xxxxxx>
Date: Wed, 4 Jun 2003 21:54:03 +0200
> I've got one more (sorry I didn't see this before). You're doing 30 scan
> lines for overscan. Then before doing vertical sync you do one more
> WSYNC. This gives you 263 scan lines. This is okay as most TVs should
> show this fine.

This is true for NTSC, but PAL VCSs will loose the colour, if a game
does an odd number of scanlines per frame. I know you (Rob) don't want
to deal with PAL issues yet, but you should still try to always do an
even number of scanlines per frame. Then your game will at least display
some colours, even if you don't create a special PAL version.

BTW, Stella does have a line counting feature. It only shows the number
of scanlines in the last frame when exiting the emulator, but that
should at least give you an idea, if you are totally off or not. Also
Stella (and z26) can simulate the PAL colour loss problem, so that you'd
know if you are doing an odd or an even number of scanlines per frame.
I have no idea how or if you can enable these features in the Mac
version though.

Ciao, Eckhard Stolberg

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