From cgonzalez@earthlink.net Thu Mar 21 01:27:10 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!cgonzalez From: cgonzalez@earthlink.net (Callum González) Newsgroups: comp.sys.m68k Subject: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Mar21.012710.5682@earthlink.net> Date: Thu, 21 Mar 1996 01:27:10 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. Requires 4MB ST-RAM and an RGB or VGA monitor. -- Callum González "We don't sign stars. We build them." PC-9821Ap2 (NEC) / NEXTSTEP 3.3 From bfournier@hanse.de Fri Mar 22 14:34:10 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!bfournier From: bfournier@hanse.de (Brian Fournier) Newsgroups: comp.sys.m68k Subject: Re: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Mar22.143410.3985@hanse.de> Date: Fri, 22 Mar 1996 14:34:10 GMT References: <1996Mar21.012710.5682@earthlink.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Mar21.012710.5682@earthlink.net>, cgonzalez@earthlink.net (Callum González) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. > A 256-point complex FFT is computed every 10 milliseconds, displaying a live spectrogram on a standard VGA monitor. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. -- Brian Fournier -- Hanse-Netzwerk Hamburg "The hatch is open. Is anyone listening?" From tsmirnov@cmu.edu Sat Mar 23 21:55:10 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!tsmirnov From: tsmirnov@cmu.edu (Tomas Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Data: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Mar23.215510.8882@cmu.edu> Date: Sat, 23 Mar 1996 21:55:10 GMT References: <1996Mar21.012710.5682@earthlink.net> <1996Mar22.143410.3985@hanse.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Mar22.143410.3985@hanse.de>, bfournier@hanse.de (Brian Fournier) 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'. -- Tomas Smirnov | tsmirnov@cmu.edu PGP Key fingerprint: 92B6 7F05 4345 EE3F "Keep the channels open."