From alaurent@uni-hamburg.de Mon Dec 25 00:46:42 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!alaurent
From: alaurent@uni-hamburg.de (Andrei Laurent)
Newsgroups: comp.sys.m68k
Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Dec25.004642.3709@uni-hamburg.de>
Date: Mon, 25 Dec 1995 00:46:42 GMT
Organization: Universität Hamburg Fachbereich Informatik
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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!
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.

Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM?

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

From neriksson@uu.net Tue Dec 26 04:02:42 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!neriksson
From: neriksson@uu.net (Natalia Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Dec26.040242.2471@uu.net>
Date: Tue, 26 Dec 1995 04:02:42 GMT
References: <1995Dec25.004642.3709@uni-hamburg.de>
Organization: UUNET Technologies, Falls Church VA
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In article <1995Dec25.004642.3709@uni-hamburg.de>, alaurent@uni-hamburg.de (Andrei Laurent) writes:
> Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler.

Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom.

-- 
Natalia Eriksson
Opinions expressed are solely my own and not those of UUNET Technologies, Falls Church VA.
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