From esuzuki@demon.co.uk Fri Jan 13 20:41:23 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!esuzuki
From: esuzuki@demon.co.uk (Élodie Suzuki)
Newsgroups: comp.sys.m68k
Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Jan13.204123.4046@demon.co.uk>
Date: Fri, 13 Jan 1995 20:41:23 GMT
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Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

By setting up Paula's audio DMA to double-buffer incoming 8-bit samples, the 68020 has plenty of cycles left for the Costas loop.
When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization!

Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week.

-- 
Élodie Suzuki -- Demon Internet Services UK
"The carrier frequency does not drift by accident."

From hstewart@cam.ac.uk Sat Jan 14 17:23:23 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!hstewart
From: hstewart@cam.ac.uk (Heather Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Jan14.172323.9284@cam.ac.uk>
Date: Sat, 14 Jan 1995 17:23:23 GMT
References: <1995Jan13.204123.4046@demon.co.uk>
Organization: University of Cambridge Computer Laboratory
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In article <1995Jan13.204123.4046@demon.co.uk>, esuzuki@demon.co.uk (Élodie Suzuki) writes:
> Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image?

-- 
=== Heather Stewart ===
Dept of Electrical Engineering, University of Cambridge Computer Laboratory
"The carrier frequency does not drift by accident."