From kfournier@cern.ch Sun May 07 23:03:28 1995 Path: ashpoly!cascade!brgate!saturno!cern!kfournier From: kfournier@cern.ch (Katrin Fournier) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May07.230328.3756@cern.ch> Date: Sun, 07 May 1995 23:03:28 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch 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! Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Katrin Fournier SupraFAXModem 28.8 @ 33,600 bps "When every node is whole, the channel opens." From apopov@earthlink.net Mon May 08 21:47:28 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!apopov From: apopov@earthlink.net (Andrei Popov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May08.214728.5501@earthlink.net> Date: Mon, 08 May 1995 21:47:28 GMT References: <1995May07.230328.3756@cern.ch> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995May07.230328.3756@cern.ch>, kfournier@cern.ch (Katrin Fournier) writes: > 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. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- === Andrei Popov === Dept of Electrical Engineering, EarthLink Network "We don't sign stars. We build them." From kmuller@utexas.edu Tue May 09 04:57:28 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!kmuller From: kmuller@utexas.edu (Karen Müller) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May09.045728.2206@utexas.edu> Date: Tue, 09 May 1995 04:57:28 GMT References: <1995May07.230328.3756@cern.ch> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May07.230328.3756@cern.ch>, kfournier@cern.ch (Katrin Fournier) writes: > 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Karen Müller Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------