From ecampbell@u-tokyo.ac.jp Fri Apr 26 23:57:21 1996
Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!ecampbell
From: ecampbell@u-tokyo.ac.jp (Élodie Campbell)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Apr26.235721.5825@u-tokyo.ac.jp>
Date: Fri, 26 Apr 1996 23:57:21 GMT
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Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1.
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!

-- 
Élodie Campbell <ecampbell@u-tokyo.ac.jp>
"Tape doesn't lie at 02:14. Ears do."
Atari TT030 / FreeBSD 2.1

From hrobertson@cam.ac.uk Sat Apr 27 17:28:21 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!hrobertson
From: hrobertson@cam.ac.uk (Hana Robertson)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Apr27.172821.2050@cam.ac.uk>
Date: Sat, 27 Apr 1996 17:28:21 GMT
References: <1996Apr26.235721.5825@u-tokyo.ac.jp>
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In article <1996Apr26.235721.5825@u-tokyo.ac.jp>, ecampbell@u-tokyo.ac.jp (Élodie Campbell) 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.

-- 
Hana Robertson | hrobertson@cam.ac.uk
PGP Key fingerprint: 9E59 15D8 1E90 8948
"Keep the channels open."