From apopov@stanford.edu Mon Feb 20 13:11:15 1995
Path: ashpoly!cascade!mxgate!coyoacan!stanford!apopov
From: apopov@stanford.edu (Anton Popov)
Newsgroups: comp.sys.m68k
Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Feb20.131115.5785@stanford.edu>
Date: Mon, 20 Feb 1995 13:11:15 GMT
Organization: Stanford University Computer Systems Lab
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Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization!
I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz.

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

-- 
Anton Popov -- Stanford University Computer Systems Lab
"Hardware is temporary. The signal survives."

From sfournier@mit.edu Wed Feb 22 09:58:15 1995
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From: sfournier@mit.edu (Sergei Fournier)
Newsgroups: comp.sys.m68k
Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Feb22.095815.5013@mit.edu>
Date: Wed, 22 Feb 1995 09:58:15 GMT
References: <1995Feb20.131115.5785@stanford.edu>
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In article <1995Feb20.131115.5785@stanford.edu>, apopov@stanford.edu (Anton Popov) writes:
> Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

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

If you are posting from AOL, please read RFC 1036 before posting again.

-- 
=== Sergei Fournier ===
Dept of Electrical Engineering, Massachusetts Institute of Technology
"Hold for relay."