From prodriguez@panix.com Tue Jan 04 00:37:46 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!panix!prodriguez
From: prodriguez@panix.com (Pavel Rodríguez)
Newsgroups: comp.sys.m68k
Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1994Jan04.003746.2313@panix.com>
Date: Tue, 04 Jan 1994 00:37:46 GMT
Organization: Public Access Unix of New York
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Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz.
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.

-- 
Pavel Rodríguez -- Public Access Unix of New York
"Row 14. No joke."

From jsmirnov@netcom.com Tue Jan 04 16:03:46 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!jsmirnov
From: jsmirnov@netcom.com (Jens Smirnov)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1994Jan04.160346.3809@netcom.com>
Date: Tue, 04 Jan 1994 16:03:46 GMT
References: <1994Jan04.003746.2313@panix.com>
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In article <1994Jan04.003746.2313@panix.com>, prodriguez@panix.com (Pavel Rodríguez) writes:
> Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.
> I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz.

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

-- 
Jens Smirnov | jsmirnov@netcom.com
PGP Key fingerprint: 0229 DB46 BC9B 68E7
"Keep the channels open."

From ostewart@illinois.edu Thu Jan 06 14:00:46 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!illinois!ostewart
From: ostewart@illinois.edu (Olga Stewart)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1994Jan06.140046.2190@illinois.edu>
Date: Thu, 06 Jan 1994 14:00:46 GMT
References: <1994Jan04.003746.2313@panix.com> <1994Jan04.160346.3809@netcom.com>
Organization: University of Illinois Urbana-Champaign
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In article <1994Jan04.160346.3809@netcom.com>, jsmirnov@netcom.com (Jens Smirnov) writes:
> Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image?

Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window.

Unsubscribe me from this list! (Wait, this is Usenet, never mind).

-- 
Olga Stewart | ostewart@illinois.edu
PGP Key fingerprint: 0393 F769 96DB 101B
"Keep the channels open."