From keriksson@inria.fr Mon Apr 04 17:40:26 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!keriksson
From: keriksson@inria.fr (Kenji Eriksson)
Newsgroups: comp.sys.m68k
Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1994Apr04.174026.4779@inria.fr>
Date: Mon, 04 Apr 1994 17:40:26 GMT
Organization: INRIA Rocquencourt
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Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz.
When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization!

Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames!

-- 
Kenji Eriksson
Opinions expressed are solely my own and not those of INRIA Rocquencourt.
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From ftakahashi@utexas.edu Tue Apr 05 17:21:26 1994
Path: ashpoly!cascade!bigsur!utexas!ftakahashi
From: ftakahashi@utexas.edu (Fiona Takahashi)
Newsgroups: comp.sys.m68k
Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1994Apr05.172126.2129@utexas.edu>
Date: Tue, 05 Apr 1994 17:21:26 GMT
References: <1994Apr04.174026.4779@inria.fr>
Organization: University of Texas at Austin
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In article <1994Apr04.174026.4779@inria.fr>, keriksson@inria.fr (Kenji Eriksson) writes:
> Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985.

-- 
Fiona Takahashi -- University of Texas at Austin
"Measuring a record you own is listening, not piracy."