From mgonzalez@uni-hamburg.de Fri Jul 21 07:25:19 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!mgonzalez
From: mgonzalez@uni-hamburg.de (Mei González)
Newsgroups: comp.sys.m68k
Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Jul21.072519.6812@uni-hamburg.de>
Date: Fri, 21 Jul 1995 07:25:19 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.

-- 
Mei González | mgonzalez@uni-hamburg.de
PGP Key fingerprint: B94C 7E5E 4168 0763
"Keep the channels open."

From sdubois@purdue.edu Sun Jul 23 03:08:19 1995
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From: sdubois@purdue.edu (Sun-mi Dubois)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Jul23.030819.2618@purdue.edu>
Date: Sun, 23 Jul 1995 03:08:19 GMT
References: <1995Jul21.072519.6812@uni-hamburg.de>
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In article <1995Jul21.072519.6812@uni-hamburg.de>, mgonzalez@uni-hamburg.de (Mei González) writes:
> Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos!

-- 
Sun-mi Dubois
Tape trading list upon request. SASE required for international mail.