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- Path: sparky!uunet!gatech!rutgers!rochester!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!andrew.cmu.edu!sm86+
- From: sm86+@andrew.cmu.edu (Stefan Monnier)
- Newsgroups: comp.sys.atari.st
- Subject: Re: Use of Falcon's DSP?
- Message-ID: <gefe5Qy00awBMEnlAB@andrew.cmu.edu>
- Date: 10 Sep 92 01:14:04 GMT
- References: <etxansk.716051298@garbod20>
- <1992Sep9.164328.15800@athena.cs.uga.edu>
- Organization: Junior, Math/Computer Science, Carnegie Mellon, Pittsburgh, PA
- Lines: 37
- In-Reply-To: <1992Sep9.164328.15800@athena.cs.uga.edu>
-
- Excerpts from netnews.comp.sys.atari.st: 9-Sep-92 Re: Use of Falcon's
- DSP? Kristopher Johnson@casto (1648)
- > The Falcon has an SDMA processor which will handle all the sound
- > stuff including, if needed, routing the sound data to the DSP for
- > any special processing. In other words, no, the DSP isn't
- > directly responsible for handling the Falcon's 8-channel, 16-bit
- > sound. However, if you want 8 (or more) completely independent
- > channels, then you will need to route the data through the DSP and
- > the DSP I/O port. The Falcon's SDMA processor will handle sampling
- > 2 channels at a time through the stereo audio input and mixing
- > down 8 channels to 2 channels for stereo output all by itself.
-
- > Yes, the DSP will allow some rather impressive uses for manipulating
- > graphics, although "unique" is a bit subjective. According to Atari,
- > the Falcon's DSP operating at 32MHz will yield as much as 25MIPS,
- > although that too is a bit subjective. However, things such as
- > real-time raytracing and very fast 3D rendering are examples of
- > what a DSP is capable of.
-
- What do you m,ean by 'real-time' raytracing ?
- Just a bit of computation: 25 frames/s * 640*480 = 7.68 Mpixels/s
- If you are able to compute the color of one pixel (and set it) in 4
- instrucions (1 cycle/instruction) with raytracing, then you're
- algorithm is REALLY GREAT !
- I know you can get fast ray-tracing using coherency and limited
- realism, but real-time require a bit more power !
-
- Nonetheless, this DSP is great and will permit some very nice
- 3D graphics and other things to come (compression, modem,
- mix-table, equalizer, 'parallel debugger', ..)
-
-
- Stefan Monnier
-
- -----------------------------------------------------
- -- On the average, people seem to be acting normal --
- -----------------------------------------------------
-