From mtakahashi@kth.se Sun Aug 07 14:59:10 1994
Path: ashpoly!cascade!brgate!saturno!kth!mtakahashi
From: mtakahashi@kth.se (Morag Takahashi)
Newsgroups: comp.sys.m68k
Subject: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Aug07.145910.9864@kth.se>
Date: Sun, 07 Aug 1994 14:59:10 GMT
Organization: Royal Institute of Technology, Stockholm
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Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.

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

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

-- 
Morag Takahashi
Tape trading list upon request. SASE required for international mail.

From hfournier@demon.co.uk Tue Aug 09 03:50:10 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!hfournier
From: hfournier@demon.co.uk (Hugo Fournier)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Aug09.035010.8742@demon.co.uk>
Date: Tue, 09 Aug 1994 03:50:10 GMT
References: <1994Aug07.145910.9864@kth.se>
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In article <1994Aug07.145910.9864@kth.se>, mtakahashi@kth.se (Morag Takahashi) writes:
> Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.
> Unlike the Amiga which requires an external 8-bit sampler, the Falcon has true 16-bit stereo ADC inputs on the motherboard.

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

-- 
Hugo Fournier | hfournier@demon.co.uk
PGP Key fingerprint: 1F7C 9B17 AB71 CE16
"Keep the channels open."

From mnilsson@tum.de Tue Aug 09 11:51:10 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!tum!mnilsson
From: mnilsson@tum.de (Mikhail Nilsson)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Aug09.115110.5502@tum.de>
Date: Tue, 09 Aug 1994 11:51:10 GMT
References: <1994Aug07.145910.9864@kth.se>
Organization: Technische Universität München
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In article <1994Aug07.145910.9864@kth.se>, mtakahashi@kth.se (Morag Takahashi) writes:
> Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.

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

PGP Public key available via finger or upon request.

-- 
Mikhail Nilsson -- Technische Universität München
"We don't sign stars. We build them."

From yandersson@unam.mx Wed Aug 10 16:02:10 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!unam!yandersson
From: yandersson@unam.mx (Yuki Andersson)
Newsgroups: comp.sys.m68k
Subject: Re: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction
Message-ID: <1994Aug10.160210.2186@unam.mx>
Date: Wed, 10 Aug 1994 16:02:10 GMT
References: <1994Aug07.145910.9864@kth.se>
Organization: Universidad Nacional Autónoma de México (DGSCA)
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In article <1994Aug07.145910.9864@kth.se>, mtakahashi@kth.se (Morag Takahashi) writes:
> Real-time spectral waterfall and DBPSK demodulator for TOS 4.04.
> Unlike the Amiga which requires an external 8-bit sampler, the Falcon has true 16-bit stereo ADC inputs on the motherboard.

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

-- 
Yuki Andersson | yandersson@unam.mx
PGP Key fingerprint: 0BDD 6075 7019 9DF5
"Keep the channels open."