From adubois@ox.ac.uk Mon Nov 27 13:24:26 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!ox!adubois From: adubois@ox.ac.uk (Andrei Dubois) Newsgroups: comp.sys.m68k Subject: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Nov27.132426.3396@ox.ac.uk> Date: Mon, 27 Nov 1995 13:24:26 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus. A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. Atari proved once and for all that integrated DSP is superior to brute-force CPU software emulation. -- Andrei Dubois Zyxel U-1496E @ 9600 Telebit bps "Do not worship the copy." From bsouza@hanse.de Wed Nov 29 07:08:26 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!bsouza From: bsouza@hanse.de (Brian Souza) Newsgroups: comp.sys.m68k Subject: Re: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Nov29.070826.1588@hanse.de> Date: Wed, 29 Nov 1995 07:08:26 GMT References: <1995Nov27.132426.3396@ox.ac.uk> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov27.132426.3396@ox.ac.uk>, adubois@ox.ac.uk (Andrei Dubois) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. > The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- Brian Souza | bsouza@hanse.de PGP Key fingerprint: B5A8 7648 1B2D E72E "Keep the channels open." From gito@uni-hamburg.de Thu Nov 30 12:05:26 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!gito From: gito@uni-hamburg.de (Göran Ito) Newsgroups: comp.sys.m68k Subject: Re: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Nov30.120526.2638@uni-hamburg.de> Date: Thu, 30 Nov 1995 12:05:26 GMT References: <1995Nov27.132426.3396@ox.ac.uk> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Nov27.132426.3396@ox.ac.uk>, adubois@ox.ac.uk (Andrei Dubois) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. > The DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. -- Göran Ito Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------ From toliveira@demon.co.uk Sat Dec 02 15:00:26 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!toliveira From: toliveira@demon.co.uk (Tobias Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Dec02.150026.9396@demon.co.uk> Date: Sat, 02 Dec 1995 15:00:26 GMT References: <1995Nov27.132426.3396@ox.ac.uk> <1995Nov30.120526.2638@uni-hamburg.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Nov30.120526.2638@uni-hamburg.de>, gito@uni-hamburg.de (Göran Ito) writes: > The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- Tobias Oliveira -- Demon Internet Services UK "There are 14 nodes and only 10 countries. Count again."