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- Newsgroups: comp.sys.atari.st
- Path: sparky!uunet!elroy.jpl.nasa.gov!hanauma.jpl.nasa.gov!hyc
- From: hyc@hanauma.jpl.nasa.gov (Howard Chu)
- Subject: Re: Falcon030 Resolutions - 1 Meg not enough?
- Message-ID: <1992Dec19.093728.11765@elroy.jpl.nasa.gov>
- Sender: news@elroy.jpl.nasa.gov (Usenet)
- Nntp-Posting-Host: hanauma.jpl.nasa.gov
- Organization: SAR Systems Development & Processing, JPL
- References: <1gu8d9INN8qf@usenet.INS.CWRU.Edu>
- Date: Sat, 19 Dec 1992 09:37:28 GMT
- Lines: 41
-
- In article <1gu8d9INN8qf@usenet.INS.CWRU.Edu> aa399@cleveland.Freenet.Edu (Len Stys) writes:
- >If I'm incorrect, please feel free to post. :)
-
- Heh. Wouldn't dream of doing anything else... }-)
- >384x480 overscanned
- >
- >There would be hardly a flicker on a TV even with this resolution
- >interlaced.
- >
- >640x400
- >768x480 overscanned
- >
- >There may be a small flicker when using graphics on a TV--no one really
- >knows how bad it may be. Any developer care to test it?
-
- I still don't understand what you're thinking. Any visible flicker would be
- identical in both of these modes (320x480 and 640x480). As I already mentioned,
- it is only noticable for single-pixel thickness horizontal lines. All of the
- info I've posted on this subject is from first-hand experience. There is nothing
- to "test" about it. If you draw a lot of horizontal lines, they'll look pretty
- bad, unless the line color and background color have similar luminance. This is
- a simple fact of interlaced video.
- >
- >I am NOT sure if 320x480 (normal), 320x240 (line-doubling),
- >640x480 (normal), and 640x240 (line-doubling) can be displayed on a TV
- >or a SC1224 monitor OR if they can be interlaced. The information
- >from John Townsend makes it unclear.
-
- All resolutions can be displayed on a TV. Line-doubling is a feature used to
- adapt the low resolutions to the high VGA scan rate and is meaningless for
- the TV. The 200 (240) row modes are non-interlaced. Period.
- >
- >It is CLEAR that 2 Megs would be more appropriate as the minimum amount
- >shipped with a Falcon030 if Atari wishes to make the Falcon030 an
- >excellent game platform.
-
- Personally I would go with 4 meg as the bare minimum.
- --
- -- Howard Chu @ Jet Propulsion Laboratory, Pasadena, CA
-
- All true wisdom is conveyed in one-line witticisms.
-