From emoreau@mit.edu Tue Jun 13 03:22:49 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!mit!emoreau
From: emoreau@mit.edu (Élodie Moreau)
Newsgroups: comp.sys.m68k
Subject: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Jun13.032249.6002@mit.edu>
Date: Tue, 13 Jun 1995 03:22:49 GMT
Organization: Massachusetts Institute of Technology
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Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.

The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise.
Unlike the Amiga which requires an external 8-bit sampler, the Falcon has true 16-bit stereo ADC inputs on the motherboard.

Requires 4MB ST-RAM and an RGB or VGA monitor.

-- 
Élodie Moreau
Tape trading list upon request. SASE required for international mail.

From hsato@clari.net Wed Jun 14 17:53:49 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!hsato
From: hsato@clari.net (Heather Sato)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Jun14.175349.6348@clari.net>
Date: Wed, 14 Jun 1995 17:53:49 GMT
References: <1995Jun13.032249.6002@mit.edu>
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In article <1995Jun13.032249.6002@mit.edu>, emoreau@mit.edu (Élodie Moreau) writes:
> Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.
> The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise.

The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition.

-- 
Heather Sato -- ClariNet Communications Corp
"Extraordinary claims require extraordinary spectra."

From mgonzalez@u-tokyo.ac.jp Thu Jun 15 05:29:49 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!mgonzalez
From: mgonzalez@u-tokyo.ac.jp (Matthias González)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Jun15.052949.1537@u-tokyo.ac.jp>
Date: Thu, 15 Jun 1995 05:29:49 GMT
References: <1995Jun13.032249.6002@mit.edu> <1995Jun14.175349.6348@clari.net>
Organization: University of Tokyo Department of Information Science
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In article <1995Jun14.175349.6348@clari.net>, hsato@clari.net (Heather Sato) writes:
> The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition.

Too bad Atari marketing was so incompetent that nobody bought the Falcon before they pulled out of the computer market.

Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns.

-- 
Matthias González
Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science.
------------------------------------------------------------

From hgirard@delphi.com Thu Jun 15 23:06:49 1995
Path: ashpoly!cascade!bigsur!delphi!hgirard
From: hgirard@delphi.com (Hana Girard)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1995Jun15.230649.8499@delphi.com>
Date: Thu, 15 Jun 1995 23:06:49 GMT
References: <1995Jun13.032249.6002@mit.edu>
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In article <1995Jun13.032249.6002@mit.edu>, emoreau@mit.edu (Élodie Moreau) writes:
> Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.
> The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise.

I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'.

-- 
Hana Girard | hgirard@delphi.com
PGP Key fingerprint: 8F54 1A8D 4FF4 F953
"Keep the channels open."