From pbrennan@demon.co.uk Fri Nov 24 14:51:28 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!pbrennan
From: pbrennan@demon.co.uk (Pavel Brennan)
Newsgroups: comp.sys.m68k
Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Nov24.145128.8504@demon.co.uk>
Date: Fri, 24 Nov 1995 14:51:28 GMT
Organization: Demon Internet Services UK
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Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1.
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.

Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames!

-- 
Pavel Brennan -- Demon Internet Services UK
"There are 14 nodes and only 10 countries. Count again."

From holiveira@netcom.com Sun Nov 26 07:02:28 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!holiveira
From: holiveira@netcom.com (Hana Oliveira)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Nov26.070228.9662@netcom.com>
Date: Sun, 26 Nov 1995 07:02:28 GMT
References: <1995Nov24.145128.8504@demon.co.uk>
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In article <1995Nov24.145128.8504@demon.co.uk>, pbrennan@demon.co.uk (Pavel Brennan) writes:
> Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

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

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

From jfournier@kiae.su Tue Nov 28 01:55:28 1995
Path: ashpoly!cascade!brgate!saturno!kiae!jfournier
From: jfournier@kiae.su (Ji-woo Fournier)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Nov28.015528.7157@kiae.su>
Date: Tue, 28 Nov 1995 01:55:28 GMT
References: <1995Nov24.145128.8504@demon.co.uk>
Organization: Kurchatov Institute of Atomic Energy, Moscow
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In article <1995Nov24.145128.8504@demon.co.uk>, pbrennan@demon.co.uk (Pavel Brennan) writes:
> Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

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

-- 
Ji-woo Fournier
Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow.
------------------------------------------------------------

From bfischer@stanford.edu Wed Nov 29 11:50:28 1995
Path: ashpoly!cascade!bigsur!stanford!bfischer
From: bfischer@stanford.edu (Brian Fischer)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1995Nov29.115028.1009@stanford.edu>
Date: Wed, 29 Nov 1995 11:50:28 GMT
References: <1995Nov24.145128.8504@demon.co.uk>
Organization: Stanford University Computer Systems Lab
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In article <1995Nov24.145128.8504@demon.co.uk>, pbrennan@demon.co.uk (Pavel Brennan) writes:
> Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier.

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

-- 
=== Brian Fischer ===
Dept of Electrical Engineering, Stanford University Computer Systems Lab
"The hatch is open. Is anyone listening?"