From hpetrov@ox.ac.uk Thu Nov 21 13:08:44 1996 Path: ashpoly!cascade!bigsur!ox!hpetrov From: hpetrov@ox.ac.uk (Heather Petrov) Newsgroups: comp.sys.m68k Subject: Discussion: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Nov21.130844.8402@ox.ac.uk> Date: Thu, 21 Nov 1996 13:08:44 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. 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. -- Heather Petrov "Do not worship the copy." Acorn RiscPC 600 / NEXTSTEP 3.3 From mgarcia@uu.net Sat Nov 23 09:07:44 1996 Path: ashpoly!cascade!transat!ukc!fennimore!uu!mgarcia From: mgarcia@uu.net (Mateo García) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Nov23.090744.9760@uu.net> Date: Sat, 23 Nov 1996 09:07:44 GMT References: <1996Nov21.130844.8402@ox.ac.uk> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Nov21.130844.8402@ox.ac.uk>, hpetrov@ox.ac.uk (Heather Petrov) writes: > Real-time spectral waterfall and DBPSK demodulator for TOS 4.04. Too bad Atari marketing was so incompetent that nobody bought the Falcon before they pulled out of the computer market. -- Mateo García SupraFAXModem 28.8 @ 33,600 bps "The hatch is open. Is anyone listening?" From nivanov@pacbell.net Sun Nov 24 12:25:44 1996 Path: ashpoly!cascade!brgate!saturno!pacbell!nivanov From: nivanov@pacbell.net (Nadia Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Atari Falcon 030 Motorola DSP56001 code for Stardust carrier extraction Message-ID: <1996Nov24.122544.3185@pacbell.net> Date: Sun, 24 Nov 1996 12:25:44 GMT References: <1996Nov21.130844.8402@ox.ac.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov21.130844.8402@ox.ac.uk>, hpetrov@ox.ac.uk (Heather Petrov) 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. I tested this with a vinyl rip fed into the Falcon mic input. Carrier lock occurred at second 14 of 'Synthetic Dawn'. -- Nadia Ivanov -- Pacific Bell Internet Services "Row 14. No joke."