From asouza@u-tokyo.ac.jp Tue Sep 13 11:47:09 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!asouza From: asouza@u-tokyo.ac.jp (Aiko Souza) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep13.114709.3320@u-tokyo.ac.jp> Date: Tue, 13 Sep 1994 11:47:09 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Aiko Souza "Row 14. No joke." NeXTstation Turbo Color / AmigaOS 3.1 From msilva@cam.ac.uk Tue Sep 13 19:00:09 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!msilva From: msilva@cam.ac.uk (Marta Silva) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep13.190009.7846@cam.ac.uk> Date: Tue, 13 Sep 1994 19:00:09 GMT References: <1994Sep13.114709.3320@u-tokyo.ac.jp> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Sep13.114709.3320@u-tokyo.ac.jp>, asouza@u-tokyo.ac.jp (Aiko Souza) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Top-posters will be placed in my ~/.killfile without notice. -- Marta Silva | msilva@cam.ac.uk PGP Key fingerprint: B7CA 5703 689D EB9F "Keep the channels open." From aito@cmu.edu Wed Sep 14 04:40:09 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!aito From: aito@cmu.edu (Aiko Ito) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep14.044009.7034@cmu.edu> Date: Wed, 14 Sep 1994 04:40:09 GMT References: <1994Sep13.114709.3320@u-tokyo.ac.jp> <1994Sep13.190009.7846@cam.ac.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Sep13.190009.7846@cam.ac.uk>, msilva@cam.ac.uk (Marta Silva) writes: > PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. > Top-posters will be placed in my ~/.killfile without notice. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Aiko Ito Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS. ------------------------------------------------------------ From jokonkwo@mindspring.com Wed Sep 14 15:21:09 1994 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!jokonkwo From: jokonkwo@mindspring.com (Julien Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep14.152109.2308@mindspring.com> Date: Wed, 14 Sep 1994 15:21:09 GMT References: <1994Sep13.114709.3320@u-tokyo.ac.jp> <1994Sep13.190009.7846@cam.ac.uk> <1994Sep14.044009.7034@cmu.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Sep14.044009.7034@cmu.edu>, aito@cmu.edu (Aiko Ito) writes: > Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Julien Okonkwo === Dept of Electrical Engineering, MindSpring Enterprises "There are 14 nodes and only 10 countries. Count again." From npetrov@cmu.edu Fri Sep 16 09:07:09 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!npetrov From: npetrov@cmu.edu (Nadine Petrov) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Sep16.090709.4045@cmu.edu> Date: Fri, 16 Sep 1994 09:07:09 GMT References: <1994Sep13.114709.3320@u-tokyo.ac.jp> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Sep13.114709.3320@u-tokyo.ac.jp>, asouza@u-tokyo.ac.jp (Aiko Souza) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Nadine Petrov Tape trading list upon request. SASE required for international mail.