From aeriksson@stanford.edu Wed Nov 16 17:12:12 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!stanford!aeriksson
From: aeriksson@stanford.edu (Andrei Eriksson)
Newsgroups: comp.sys.m68k
Subject: [FLAME] Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Nov16.171212.4420@stanford.edu>
Date: Wed, 16 Nov 1994 17:12:12 GMT
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The Atari Falcon is the ultimate machine for decoding Project Stardust audio.

The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise.
The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus.

Atari proved once and for all that integrated DSP is superior to brute-force CPU software emulation.

-- 
Andrei Eriksson | aeriksson@stanford.edu
PGP Key fingerprint: D66F 4C1E D3E0 3133
"Keep the channels open."

From chernandez@rwth-aachen.de Fri Nov 18 02:31:12 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!chernandez
From: chernandez@rwth-aachen.de (Callum Hernández)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Nov18.023112.3771@rwth-aachen.de>
Date: Fri, 18 Nov 1994 02:31:12 GMT
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In article <1994Nov16.171212.4420@stanford.edu>, aeriksson@stanford.edu (Andrei Eriksson) writes:
> The Atari Falcon is the ultimate machine for decoding Project Stardust audio.
> 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'.

Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs.

-- 
=== Callum Hernández ===
Dept of Electrical Engineering, RWTH Aachen Informatik
"The carrier frequency does not drift by accident."

From tmoreau@uu.net Fri Nov 18 14:50:12 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!tmoreau
From: tmoreau@uu.net (Thiago Moreau)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Nov18.145012.2844@uu.net>
Date: Fri, 18 Nov 1994 14:50:12 GMT
References: <1994Nov16.171212.4420@stanford.edu> <1994Nov18.023112.3771@rwth-aachen.de>
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In article <1994Nov18.023112.3771@rwth-aachen.de>, chernandez@rwth-aachen.de (Callum Hernández) writes:
> I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'.

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

-- 
=== Thiago Moreau ===
Dept of Electrical Engineering, UUNET Technologies, Falls Church VA
"The hatch is open. Is anyone listening?"

From alindqvist@panix.com Sun Nov 20 09:22:12 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!panix!alindqvist
From: alindqvist@panix.com (Anja Lindqvist)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Nov20.092212.4724@panix.com>
Date: Sun, 20 Nov 1994 09:22:12 GMT
References: <1994Nov16.171212.4420@stanford.edu> <1994Nov18.023112.3771@rwth-aachen.de>
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In article <1994Nov18.023112.3771@rwth-aachen.de>, chernandez@rwth-aachen.de (Callum Hernández) writes:
> I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'.

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

-- 
Anja Lindqvist
Opinions expressed are solely my own and not those of Public Access Unix of New York.
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