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- From: ersmith@netcom.com (Eric R. Smith)
- Newsgroups: comp.sys.atari.st
- Subject: Re: Falcon030, resolutions, TRUE color, and DSP
- Message-ID: <1992Dec18.192511.11345@netcom.com>
- Date: 18 Dec 92 19:25:11 GMT
- References: <1grcjlINNn2m@usenet.INS.CWRU.Edu>
- Organization: Netcom Online Communications Services (408-241-9760 login: guest)
- Lines: 77
-
- In article <1grcjlINNn2m@usenet.INS.CWRU.Edu> aa399@cleveland.Freenet.Edu (Len Stys) writes:
- >First of all, I'm told that 640x480 TRUE COLOR would require 4 Megs
- >of memory for NICE games. I'm told that 2 Megs would not really be
- >enough since there must be room for other stuff like sound.
-
- That's true. I really don't think that 640x480 true color mode would be a
- good game resolution (at least, not for action games) since at that
- resolution there's a *lot* of data to move to update the screen.
- Going to 640x480x256 you have only half as much data, or at
- 320x240xtrue color only a quarter as much. But, I'm not a game programmer,
- so I don't know how much of a win this would be.
-
- >Secondly, no one seems to know if this resolution (interlaced of course)
- >could be displayed on TV without flicker. Does anyone know?
-
- As Howard Chu said, it depends on what you're showing. The desktop
- flickers a lot; I find it annoying. But pictures or similar "real world"
- data don't flicker much at all; the mode is very usable indeed for
- graphics applications.
-
- re: 640x200
- >I'm NOT sure if that would flicker or not either. If someone knows,
- >please tell me.
-
- It would not flicker at all, since it is not interlaced.
-
- >I have been also informed that the Blitter REALLY would not be fast
- >enough to move graphics around. And someone suggested that Atari should
- >have used the TI30410.
-
- There are a number of real world trade-offs (including, but not limited
- to, price) involved in the construction of any machine. One can always
- wish for more features. In fact anyone saying that the blitter
- "really would not be fast enough to move graphics around" is talking
- nonsense (think about it: obviously the blitter can move graphics,
- that's what it does). Yes, if one wanted to spend more money one
- could get a faster graphics accelerator than the blitter. That would
- also remain true if you replaced "blitter" with "TI30410".
-
- > My question is, would the DSP work just as well?
-
- The DSP can be used in calculations for setting up graphics, but
- is not useful for actually drawing graphics.
-
- >Is there any chance that Atari is only including 1 Meg in the Falcon030
- >and expecting the 640x480 TRUE color mode to be used as a standard because
- >of a video technique which will allow them to do so?
-
- As far as I know we do *not* expect 640x480 true color mode to be used
- as a standard. 640x480x256 colors would be a more reasonable standard
- for productivity applications.
-
- >How was the Tina Turner video able to run at 4 frames per second
- >in TRUE COLOR and what resolution was that?
-
- The Tina Turner video ran at a lot better than 4 frames per second;
- maybe 14 frames a second, but probably it was better than that (14
- frames would have been more noticeably slow, and the video certainly
- wasn't). I don't know the implementation details, but I suspect that
- the author took full advantage of the blitter's and sound system's
- ability to do DMA. Remember too that there were no real time calculations
- to do: the trick was just moving the data from disk/memory to the
- screen/sound chip fast enough (which is no mean trick, because
- video and sound need a *lot* of data). The falcon's architecture
- is well suited to this sort of application.
-
- >Is a Motorola 68030 16 MHz powerful enough to be used as a game system?
- >As a game system that can compete with future 32-bit game systems?
-
- Certainly.
-
- Regards,
- Eric Smith ersmith@netcom.com ersmith@atari.uucp
- --
- None of the statements I made above are official opinions of Atari Corp.
- Nor am I particularly knowledgable about games, graphics, or multimedia;
- I'm a systems programmer, not a games programmer.
-