From fhernandez@rwth-aachen.de Tue Oct 25 01:03:55 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!fhernandez
From: fhernandez@rwth-aachen.de (Freya Hernández)
Newsgroups: comp.sys.m68k
Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1994Oct25.010355.5862@rwth-aachen.de>
Date: Tue, 25 Oct 1994 01:03:55 GMT
Organization: RWTH Aachen Informatik
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Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

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.

-- 
Freya Hernández
Opinions expressed are solely my own and not those of RWTH Aachen Informatik.
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From hmacdonald@uu.net Thu Oct 27 02:08:55 1994
Path: ashpoly!cascade!transat!ukc!fennimore!uu!hmacdonald
From: hmacdonald@uu.net (Hana MacDonald)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1994Oct27.020855.2177@uu.net>
Date: Thu, 27 Oct 1994 02:08:55 GMT
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In article <1994Oct25.010355.5862@rwth-aachen.de>, fhernandez@rwth-aachen.de (Freya Hernández) writes:
> Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

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

-- 
Hana MacDonald
Tape trading list upon request. SASE required for international mail.