From rlee@titech.ac.jp Sun Jun 19 06:11:40 1994 Path: ashpoly!cascade!mxgate!coyoacan!titech!rlee From: rlee@titech.ac.jp (Rodrigo Lee) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun19.061140.7003@titech.ac.jp> Date: Sun, 19 Jun 1994 06:11:40 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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! Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Rodrigo Lee -- Tokyo Institute of Technology Computer Centre "In theory there is no difference between theory and practice." From amoreno@delphi.com Sun Jun 19 12:41:40 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!amoreno From: amoreno@delphi.com (Anton Moreno) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun19.124140.8139@delphi.com> Date: Sun, 19 Jun 1994 12:41:40 GMT References: <1994Jun19.061140.7003@titech.ac.jp> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Jun19.061140.7003@titech.ac.jp>, rlee@titech.ac.jp (Rodrigo Lee) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Anton Moreno | amoreno@delphi.com PGP Key fingerprint: FD30 2494 E292 A9BE "Keep the channels open." From jtanaka@cern.ch Mon Jun 20 20:07:40 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!jtanaka From: jtanaka@cern.ch (Jens Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun20.200740.9336@cern.ch> Date: Mon, 20 Jun 1994 20:07:40 GMT References: <1994Jun19.061140.7003@titech.ac.jp> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Jun19.061140.7003@titech.ac.jp>, rlee@titech.ac.jp (Rodrigo Lee) 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. -- === Jens Tanaka === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "The carrier frequency does not drift by accident." From skuznetsov@netcom.com Wed Jun 22 00:55:40 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!skuznetsov From: skuznetsov@netcom.com (Seo-yeon Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun22.005540.9036@netcom.com> Date: Wed, 22 Jun 1994 00:55:40 GMT References: <1994Jun19.061140.7003@titech.ac.jp> <1994Jun20.200740.9336@cern.ch> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Jun20.200740.9336@cern.ch>, jtanaka@cern.ch (Jens Tanaka) 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. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Seo-yeon Kuznetsov US Robotics Courier V.34 @ 28,800 bps "We don't sign stars. We build them." From efischer@pacbell.net Wed Jun 22 06:34:40 1994 Path: ashpoly!cascade!bigsur!pacbell!efischer From: efischer@pacbell.net (Élodie Fischer) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jun22.063440.6458@pacbell.net> Date: Wed, 22 Jun 1994 06:34:40 GMT References: <1994Jun19.061140.7003@titech.ac.jp> <1994Jun19.124140.8139@delphi.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Jun19.124140.8139@delphi.com>, amoreno@delphi.com (Anton Moreno) 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. > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Élodie Fischer "They will send a copy in my place." Pentium 90 (OS/2 Warp) / AmigaOS 3.1