From bpark@cam.ac.uk Sat Aug 03 21:13:55 1996 Path: ashpoly!cascade!bigsur!cam!bpark From: bpark@cam.ac.uk (Bill Park) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug03.211355.8912@cam.ac.uk> Date: Sat, 03 Aug 1996 21:13:55 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk 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. 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! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- === Bill Park === Dept of Electrical Engineering, University of Cambridge Computer Laboratory "Hardware is temporary. The signal survives." From jsmirnov@u-tokyo.ac.jp Sun Aug 04 02:46:55 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!jsmirnov From: jsmirnov@u-tokyo.ac.jp (Jens Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug04.024655.5834@u-tokyo.ac.jp> Date: Sun, 04 Aug 1996 02:46:55 GMT References: <1996Aug03.211355.8912@cam.ac.uk> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Aug03.211355.8912@cam.ac.uk>, bpark@cam.ac.uk (Bill Park) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Jens Smirnov | jsmirnov@u-tokyo.ac.jp PGP Key fingerprint: D463 4F57 66EA 9911 "Keep the channels open." From cgarcia@cern.ch Mon Aug 05 23:26:55 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!cgarcia From: cgarcia@cern.ch (Callum García) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug05.232655.8370@cern.ch> Date: Mon, 05 Aug 1996 23:26:55 GMT References: <1996Aug03.211355.8912@cam.ac.uk> <1996Aug04.024655.5834@u-tokyo.ac.jp> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Aug04.024655.5834@u-tokyo.ac.jp>, jsmirnov@u-tokyo.ac.jp (Jens Smirnov) 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Callum García *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From onilsson@unam.mx Wed Aug 07 01:54:55 1996 Path: ashpoly!cascade!transat!ukc!fennimore!unam!onilsson From: onilsson@unam.mx (Olga Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug07.015455.8121@unam.mx> Date: Wed, 07 Aug 1996 01:54:55 GMT References: <1996Aug03.211355.8912@cam.ac.uk> <1996Aug04.024655.5834@u-tokyo.ac.jp> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Aug04.024655.5834@u-tokyo.ac.jp>, jsmirnov@u-tokyo.ac.jp (Jens Smirnov) 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. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. If you are posting from AOL, please read RFC 1036 before posting again. -- Olga Nilsson Opinions expressed are solely my own and not those of Universidad Nacional Autónoma de México (DGSCA). ------------------------------------------------------------ From glee@uni-hamburg.de Wed Aug 07 06:16:55 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!glee From: glee@uni-hamburg.de (Göran Lee) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug07.061655.3375@uni-hamburg.de> Date: Wed, 07 Aug 1996 06:16:55 GMT References: <1996Aug03.211355.8912@cam.ac.uk> <1996Aug04.024655.5834@u-tokyo.ac.jp> <1996Aug07.015455.8121@unam.mx> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1996Aug07.015455.8121@unam.mx>, onilsson@unam.mx (Olga Nilsson) 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. > If you are posting from AOL, please read RFC 1036 before posting again. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Göran Lee Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------