From: Alex_Topic@tvbbs.wimsey.bc.ca (Alex Topic)
Newsgroups: alt.sys.amiga.demos
Subject: Re: PAL or NTSC?
Date: 26 Jan 93 20:03:39 GMT
Organization: Tunnel-Vision BBS!


 MV> No, in NTSC, you'll get 16% (if I calculated it correctly) less time
 MV> to
 MV> create your display, as NTSC runs in 60 Hz compared to PAL's 50 Hz.
 MV> On top
 MV> of that, PAL has a higher resolution. I don't know if the processor
 MV> runs
 MV> faster on a NTSC machine (for timing purposes), but the difference is
 MV> so
 MV> small compared to the difference between 20 ms/frame and 17 ms/frame.
 MV> So there is no reason to use NTSC for demos.

  Okay NTSC may have 16% less time for scanning, however our CPU runs
abit faster, which may make up the difference... NTSC 7.16MHZ PAL 7.09MHZ..
the minute difference may in the end result in let the NTSC rate do more
bus cycles, than in pal in the give time.
 
  262 - 200 = 62 lines.. 60 lines, plus maybe 10 at the top of the frame.
70 scan lines. 70 scanlines... with a 200 line display..
 
  312 - 256 = 56 lines.. + 10... 66 scan lines.. heh we have 4 extra scan
lines in NTSC. Not only that our CPU clock rate is abit faster..meaning
we can more done even in the same amount of time. 

  Yes PAL is great for display, and better than NTSC in my opinion. However
NTSC is faster, in the long run. 
 
  I'm confused I may enter a demo in that AmeriCon... and everything must
be in NTSC, 1 meg chip.. I really want to do it in PAL, but I may have to
stick with NTSC. If I do, I will must likely use the speed for my 
advantage. Yes demos can be done in NTSC... 

 MV> Sure that the flickering isn't simply because the refresh rate is
 MV> lower in
 MV> PAL? Americans are perhaps bothered by it because they are used to
 MV> the
 MV> higher frequency of NTSC.

    Well I think I'm in between. I always use PAL in most cases. I do not
notice the flicker that much anymore, and seem to have adjusted. I like
both PAL and NTSC..

 MV> I still use an old TV set. I'm not as rich as all americans seem to
 MV> be.
 MV> Rich capitalist pigs! :-)

   No not all Americans are rich... I'm actually a fairly poor student.
I had to work hard for my system, and do not think I will get an A1200
for atleast 1-2 years... unfortunatly money does not grow on trees.

   Yeah I used a TV for 2 months when I first got my Amiga, back in 1990..
Real good for HAM pictures...but lousy for text...

 MV> Actually, there seems to become three different standards for HDTV
 MV> (for America, Europe and Japan I think). They never learn, it
 MV> seems...
 MV> Right now, bigger TV projects are recorded on film (16 or 35 mm, I'd
 MV> guess), to be able to show on HDTV's. (At least, Swedish television
 MV> does.)
 MV> --

     That is so stupid how America, Europe, and Japan have to be so
different from each other. We should all try to have the same standard.
In Europe you guys drive on the passenger seat..heh how strange. Is it
like that all over europe? I'm not sure in Japan if they are the same..hmm
I think Japan uses NTSC... 
 
    There should be 1 HDTV standard, geez it will make life easier..heh
I guess the source of the problem is the amount of HZ the power is.
We have 60hz, and you guys 50hz... Any reason why the difference?
 
 Catch you later...
 
-ALex

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Newsgroups: alt.sys.amiga.demos