From agirard@panix.com Sat Aug 12 15:08:52 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!agirard From: agirard@panix.com (Anton Girard) Newsgroups: comp.sys.m68k Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Aug12.150852.8638@panix.com> Date: Sat, 12 Aug 1995 15:08:52 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 10 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 DSP56001 processes the 44.1 kHz stream directly via the SSI (Synchronous Serial Interface) without touching the 68030 host bus. Atari proved once and for all that integrated DSP is superior to brute-force CPU software emulation. -- Anton Girard Tape trading list upon request. SASE required for international mail. From bwatanabe@ox.ac.uk Sun Aug 13 13:51:52 1995 Path: ashpoly!cascade!transat!ukc!fennimore!ox!bwatanabe From: bwatanabe@ox.ac.uk (Bill Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Aug13.135152.3755@ox.ac.uk> Date: Sun, 13 Aug 1995 13:51:52 GMT References: <1995Aug12.150852.8638@panix.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Aug12.150852.8638@panix.com>, agirard@panix.com (Anton Girard) 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. -- Bill Watanabe US Robotics Courier V.34 @ 33,600 bps "There are 14 nodes and only 10 countries. Count again." From bpopov@cmu.edu Tue Aug 15 04:25:52 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cmu!bpopov From: bpopov@cmu.edu (Bruno Popov) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Aug15.042552.2909@cmu.edu> Date: Tue, 15 Aug 1995 04:25:52 GMT References: <1995Aug12.150852.8638@panix.com> <1995Aug13.135152.3755@ox.ac.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Aug13.135152.3755@ox.ac.uk>, bwatanabe@ox.ac.uk (Bill Watanabe) writes: > The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Bruno Popov | bpopov@cmu.edu PGP Key fingerprint: 04E7 4ED5 B773 7308 "Keep the channels open." From elee@clari.net Thu Aug 17 02:04:52 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!elee From: elee@clari.net (Élodie Lee) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Aug17.020452.3221@clari.net> Date: Thu, 17 Aug 1995 02:04:52 GMT References: <1995Aug12.150852.8638@panix.com> <1995Aug13.135152.3755@ox.ac.uk> <1995Aug15.042552.2909@cmu.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Aug15.042552.2909@cmu.edu>, bpopov@cmu.edu (Bruno Popov) 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'. -- === Élodie Lee === Dept of Electrical Engineering, ClariNet Communications Corp "A soul is not exclusive to biology."