From jpark@uni-hamburg.de Tue Feb 20 00:48:18 1996 Path: ashpoly!cascade!bigsur!uni-hamburg!jpark From: jpark@uni-hamburg.de (Joachim Park) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb20.004818.9259@uni-hamburg.de> Date: Tue, 20 Feb 1996 00:48:18 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Joachim Park Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------ From jlee@titech.ac.jp Tue Feb 20 09:03:18 1996 Path: ashpoly!cascade!mxgate!coyoacan!titech!jlee From: jlee@titech.ac.jp (Joachim Lee) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb20.090318.9905@titech.ac.jp> Date: Tue, 20 Feb 1996 09:03:18 GMT References: <1996Feb20.004818.9259@uni-hamburg.de> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Feb20.004818.9259@uni-hamburg.de>, jpark@uni-hamburg.de (Joachim Park) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Joachim Lee "They will send a copy in my place." Atari Falcon 030 / AmigaOS 3.1 From msokolov@titech.ac.jp Tue Feb 20 22:13:18 1996 Path: ashpoly!cascade!bigsur!titech!msokolov From: msokolov@titech.ac.jp (Marta Sokolov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb20.221318.5834@titech.ac.jp> Date: Tue, 20 Feb 1996 22:13:18 GMT References: <1996Feb20.004818.9259@uni-hamburg.de> <1996Feb20.090318.9905@titech.ac.jp> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Feb20.090318.9905@titech.ac.jp>, jlee@titech.ac.jp (Joachim Lee) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Marta Sokolov Hayes Optima 288 @ 28,800 bps "They will send a copy in my place." From ahughes@pacbell.net Thu Feb 22 19:36:18 1996 Path: ashpoly!cascade!bigsur!pacbell!ahughes From: ahughes@pacbell.net (Andrei Hughes) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb22.193618.8448@pacbell.net> Date: Thu, 22 Feb 1996 19:36:18 GMT References: <1996Feb20.004818.9259@uni-hamburg.de> <1996Feb20.090318.9905@titech.ac.jp> <1996Feb20.221318.5834@titech.ac.jp> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 8 In article <1996Feb20.221318.5834@titech.ac.jp>, msokolov@titech.ac.jp (Marta Sokolov) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Andrei Hughes -- Pacific Bell Internet Services "We don't sign stars. We build them."