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- Path: sparky!uunet!gatech!emory!athena.cs.uga.edu!castor!kjohnson
- From: kjohnson@castor.cs.uga.edu (Kristopher Johnson)
- Newsgroups: comp.sys.atari.st
- Subject: Re: Use of Falcon's DSP?
- Message-ID: <1992Sep9.164328.15800@athena.cs.uga.edu>
- Date: 9 Sep 92 16:43:28 GMT
- References: <etxansk.716051298@garbod20>
- Sender: news@athena.cs.uga.edu
- Organization: University of Georgia, Athens
- Lines: 36
-
- In article <etxansk.716051298@garbod20> etxansk@garbo.ericsson.se writes:
- >
- > I read in Atari ST User (a UK magazine), issue #37, about the
- >DSP chip in the new Falcon computer.
- >
- > If I remember it correctly, they claim that the DSP can handle
- >eight sound channels, but also that there are four DMA stereo
- >channels.
- >
- > I don't get it, is the DSP responsible for DMA, or are there
- >two types of sound synthesis in the Falcon (DMA _and_ with the
- >DSP)?
- >
- > Also, does anyone know if the DSP will make the Falcon unique
- >when it comes to manipulating graphics? (At least as long as
- >no other computer or video game company decide to use this
- >standard DSP chip for their product.)
- >
- > Anders Skelander
-
- 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.
-