From ncampbell@ox.ac.uk Sat Mar 04 13:32:04 1995
Path: ashpoly!cascade!brgate!saturno!ox!ncampbell
From: ncampbell@ox.ac.uk (Nadine Campbell)
Newsgroups: comp.sys.m68k
Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Mar04.133204.1233@ox.ac.uk>
Date: Sat, 04 Mar 1995 13:32:04 GMT
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Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization!
The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1.

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

-- 
Nadine Campbell -- Oxford University Computing Laboratory
"Measuring a record you own is listening, not piracy."

From rkim@earthlink.net Sat Mar 04 16:17:04 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!rkim
From: rkim@earthlink.net (Raj Kim)
Newsgroups: comp.sys.m68k
Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Mar04.161704.6913@earthlink.net>
Date: Sat, 04 Mar 1995 16:17:04 GMT
References: <1995Mar04.133204.1233@ox.ac.uk>
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In article <1995Mar04.133204.1233@ox.ac.uk>, ncampbell@ox.ac.uk (Nadine 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.

-- 
Raj Kim
Opinions expressed are solely my own and not those of EarthLink Network.
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