Re: [stella] PAL Conversion Preferences

Subject: Re: [stella] PAL Conversion Preferences
From: Christopher Tumber <christophertumber@xxxxxxxxxx>
Date: Sat, 16 Nov 2002 00:33:51 -0500
Eckhard wrote:

>No, Christopher is right. Both PAL and NTSC TVs have
>an aspect ratio of 4:3. But NTSC displays only 200
>scanlines in this area, while PAL display 240 lines.
>So if you put a 200 line display centered on a 240
>line screen, the picture will look vertically squeezed
>compared to the original.

Okay, so the choices wrt to converting an NTSC game to PAL seem to be:

True PAL:
- Modify palette
- 312 scanlines 
- True PAL mode
- Game will run slower (unless you mod it to compensate)
- Image will appear squished if you just add 50 extra blank scanlines (or you must stretch everything to fit screen properly)

- Modify palette
- Leave scanlines at 262
- A lot easier to do (No speed issues, no sprite/etc resizing)
- Some (rare?) PAL tv's may not be able to handle 60hz signal at all.
- Will also appear squished except on multistandard tvs which can do a streched 60hz mode.
(If someone's using a multi-standard tv, won't they have an NTSC option anyway? So why not just keep it in NTSC?)

Does that sum it up? What has everyone else done as far as PAL/NTSC versions (true vs pseudo)?


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