From amuller@panix.com Sat Nov 04 19:43:58 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!amuller From: amuller@panix.com (Astrid Müller) Newsgroups: comp.sys.m68k Subject: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Nov04.194358.5647@panix.com> Date: Sat, 04 Nov 1995 19:43:58 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. The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. 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. -- Astrid Müller Tape trading list upon request. SASE required for international mail. From stakahashi@pacbell.net Mon Nov 06 05:50:58 1995 Path: ashpoly!cascade!bigsur!pacbell!stakahashi From: stakahashi@pacbell.net (Sun-mi Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Nov06.055058.4983@pacbell.net> Date: Mon, 06 Nov 1995 05:50:58 GMT References: <1995Nov04.194358.5647@panix.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov04.194358.5647@panix.com>, amuller@panix.com (Astrid Müller) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. > The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. Atari Falcon vs Amiga 1200 flamewar in 3... 2... 1... -- Sun-mi Takahashi Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From trobertson@kiae.su Mon Nov 06 09:39:58 1995 Path: ashpoly!cascade!brgate!saturno!kiae!trobertson From: trobertson@kiae.su (Thiago Robertson) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Nov06.093958.6089@kiae.su> Date: Mon, 06 Nov 1995 09:39:58 GMT References: <1995Nov04.194358.5647@panix.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Nov04.194358.5647@panix.com>, amuller@panix.com (Astrid Müller) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. > The 14.2 Hz peak shows up as a bright white vertical line against the blue background noise. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. PGP Public key available via finger or upon request. -- Thiago Robertson "Hold for relay." 486DX2/66 (Linux 1.2.13) / NEXTSTEP 3.3 From emartinez@utexas.edu Tue Nov 07 16:28:58 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!emartinez From: emartinez@utexas.edu (Emi Martínez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1995Nov07.162858.5876@utexas.edu> Date: Tue, 07 Nov 1995 16:28:58 GMT References: <1995Nov04.194358.5647@panix.com> <1995Nov06.093958.6089@kiae.su> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov06.093958.6089@kiae.su>, trobertson@kiae.su (Thiago Robertson) writes: > I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. The SSI to DSP56001 architecture on the Falcon is magnificent. Zero CPU overhead during 50 kHz audio acquisition. -- === Emi Martínez === Dept of Electrical Engineering, University of Texas at Austin "We don't sign stars. We build them."