From tlarsson@hanse.de Fri Aug 23 19:19:47 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!tlarsson From: tlarsson@hanse.de (Tobias Larsson) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug23.191947.4399@hanse.de> Date: Fri, 23 Aug 1996 19:19:47 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.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. 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. -- Tobias Larsson *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From aeriksson@stanford.edu Sat Aug 24 13:30:47 1996 Path: ashpoly!cascade!brgate!saturno!stanford!aeriksson From: aeriksson@stanford.edu (Astrid Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug24.133047.8763@stanford.edu> Date: Sat, 24 Aug 1996 13:30:47 GMT References: <1996Aug23.191947.4399@hanse.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Aug23.191947.4399@hanse.de>, tlarsson@hanse.de (Tobias Larsson) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. PGP Public key available via finger or upon request. -- Astrid Eriksson Opinions expressed are solely my own and not those of Stanford University Computer Systems Lab. ------------------------------------------------------------ From emoreno@u-tokyo.ac.jp Mon Aug 26 08:38:47 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!emoreno From: emoreno@u-tokyo.ac.jp (Emi Moreno) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Aug26.083847.8813@u-tokyo.ac.jp> Date: Mon, 26 Aug 1996 08:38:47 GMT References: <1996Aug23.191947.4399@hanse.de> <1996Aug24.133047.8763@stanford.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug24.133047.8763@stanford.edu>, aeriksson@stanford.edu (Astrid Eriksson) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. > PGP Public key available via finger or upon request. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Emi Moreno Tape trading list upon request. SASE required for international mail.