From bgarcia@pacbell.net Sun Jun 09 03:07:32 1996
Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!bgarcia
From: bgarcia@pacbell.net (Bastien García)
Newsgroups: comp.sys.m68k
Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Jun09.030732.4768@pacbell.net>
Date: Sun, 09 Jun 1996 03:07:32 GMT
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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?

-- 
Bastien García
Tape trading list upon request. SASE required for international mail.

From msantos@berkeley.edu Mon Jun 10 02:54:32 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!msantos
From: msantos@berkeley.edu (Mikhail Santos)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA
Message-ID: <1996Jun10.025432.3055@berkeley.edu>
Date: Mon, 10 Jun 1996 02:54:32 GMT
References: <1996Jun09.030732.4768@pacbell.net>
Organization: UC Berkeley Department of EECS
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In article <1996Jun09.030732.4768@pacbell.net>, bgarcia@pacbell.net (Bastien García) writes:
> 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!

PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985.

-- 
Mikhail Santos | msantos@berkeley.edu
PGP Key fingerprint: 8633 2899 BA94 6D45
"Keep the channels open."