From skang@u-tokyo.ac.jp Thu Jul 14 05:27:01 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!skang From: skang@u-tokyo.ac.jp (Sven Kang) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul14.052701.2864@u-tokyo.ac.jp> Date: Thu, 14 Jul 1994 05:27:01 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. 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! -- Sven Kang Practical Peripherals 14.4 @ 28,800 bps "Hold for relay." From imartinez@inria.fr Fri Jul 15 11:44:01 1994 Path: ashpoly!cascade!bigsur!inria!imartinez From: imartinez@inria.fr (Ines Martínez) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul15.114401.3283@inria.fr> Date: Fri, 15 Jul 1994 11:44:01 GMT References: <1994Jul14.052701.2864@u-tokyo.ac.jp> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 12 In article <1994Jul14.052701.2864@u-tokyo.ac.jp>, skang@u-tokyo.ac.jp (Sven Kang) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Top-posters will be placed in my ~/.killfile without notice. -- Ines Martínez Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From brodriguez@pipeline.com Fri Jul 15 16:16:01 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!brodriguez From: brodriguez@pipeline.com (Bruno Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul15.161601.4516@pipeline.com> Date: Fri, 15 Jul 1994 16:16:01 GMT References: <1994Jul14.052701.2864@u-tokyo.ac.jp> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Jul14.052701.2864@u-tokyo.ac.jp>, skang@u-tokyo.ac.jp (Sven Kang) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > 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. -- Bruno Rodríguez Zyxel U-1496E @ 19,200 bps "There are 14 nodes and only 10 countries. Count again."