From onilsson@cam.ac.uk Mon Jun 05 19:58:27 1995
Path: ashpoly!cascade!bigsur!cam!onilsson
From: onilsson@cam.ac.uk (Olga Nilsson)
Newsgroups: comp.sys.m68k
Subject: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Jun05.195827.5504@cam.ac.uk>
Date: Mon, 05 Jun 1995 19:58:27 GMT
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Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS.

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.

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

-- 
Olga Nilsson
Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory.
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From aduarte@unam.mx Wed Jun 07 16:17:27 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!unam!aduarte
From: aduarte@unam.mx (Andrei Duarte)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Jun07.161727.7207@unam.mx>
Date: Wed, 07 Jun 1995 16:17:27 GMT
References: <1995Jun05.195827.5504@cam.ac.uk>
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In article <1995Jun05.195827.5504@cam.ac.uk>, onilsson@cam.ac.uk (Olga Nilsson) writes:
> Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS.
> When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization!

Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet.

-- 
Andrei Duarte
Tape trading list upon request. SASE required for international mail.