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How many Amiga demos have NTSC parts?

category: general [glöplog]
 
Off the top of your head, I mean, that you remember.

I can count at least two from personal experience: Fairlight & Virtual Dreams' Love, where Jim "Trixter" Leonard famously had to cheat by using WinUAE instead of real hardware for those parts (for the making of MindCandy Vol. 2) because the hardware encoder couldn't handle the changes, and Appendix's Contagion.

I'm asking mostly out of interest, but also wondering why they put some parts in 60Hz? For faster performance, I guess.
added on the 2017-04-28 18:54:05 by Foebane72 Foebane72
60Hz does not imply NTSC. PAL60 and other 60Hz modes also exist.

And I can't imagine 60Hz is for "faster performance". I might be an idiot but I think that those 10 extra frames would mean there is less CPU time available per frame than on 50Hz.
killer by cncd, whole demo runs in ntsc and yes it's for faster performance i think.
Also Virgill Dreams intro by Essence had it.

The idea was quite nice actually. NTSC and PAL screens covered the same area on the monitor, but NTSC used fewer lines for that (200 vs 256 standard). So by accepting bigger scanlines when using NTSC, one could get a significant speed boost, i.e. around 20%. The downside was that not every monitor would sync. (Love ran out of spec IIRC. My 1942 could never sync that one part, but did all the other demos.)
added on the 2017-04-29 00:27:43 by noname noname
I remember Imagine used to render maybe 1% faster if you put the A1200 in NTSC mode :-) (Which may or may not have been PAL60.) I suppose it was somehow related to the lower vertical resolution in a strange way; I remember it also used to render faster if you pulled the screen all the way to the bottom.
added on the 2017-04-29 01:03:41 by Sesse Sesse
You know that "NTSC" or "PAL60" does not make any sense when the output is RGB, right?
(and who uses composite output on the Amiga?)
I wonder if Invitation None by Sonik Clique was using NTSC. Remember it fell over at TG and I believe this was the reason.
added on the 2017-04-29 08:15:41 by rloaderro rloaderro
Yes, I mean 60Hz. Forgot about PAL60.
added on the 2017-04-29 09:09:51 by Foebane72 Foebane72
Quote:
I remember Imagine used to render maybe 1% faster if you put the A1200 in NTSC mode :-) (Which may or may not have been PAL60.) I suppose it was somehow related to the lower vertical resolution in a strange way; I remember it also used to render faster if you pulled the screen all the way to the bottom.

Makes sense, as NTSC has lower average DMA load: 200/256 = 78% as much bitplane data in 50/60 = 83% as much frame time.
added on the 2017-04-30 16:23:42 by Blueberry Blueberry
Quote:
I wonder if Invitation None by Sonik Clique was using NTSC. Remember it fell over at TG and I believe this was the reason.


There are 2 versions of the demo, one runs in PAL, one in NTSC.
added on the 2017-04-30 16:33:41 by StingRay StingRay

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