From ilee@kiae.su Thu Aug 10 00:05:20 1995 Path: ashpoly!cascade!bigsur!kiae!ilee From: ilee@kiae.su (Ines Lee) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug10.000520.5141@kiae.su> Date: Thu, 10 Aug 1995 00:05:20 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 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? -- Ines Lee Hayes Optima 288 @ 9600 Telebit bps "The hatch is open. Is anyone listening?" From efischer@u-tokyo.ac.jp Fri Aug 11 17:37:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!efischer From: efischer@u-tokyo.ac.jp (Emi Fischer) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug11.173720.8528@u-tokyo.ac.jp> Date: Fri, 11 Aug 1995 17:37:20 GMT References: <1995Aug10.000520.5141@kiae.su> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Aug10.000520.5141@kiae.su>, ilee@kiae.su (Ines Lee) 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? -- Emi Fischer SupraFAXModem 28.8 @ ISDN 64k bps "The hatch is open. Is anyone listening?" From thernandez@stanford.edu Sun Aug 13 00:49:20 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!thernandez From: thernandez@stanford.edu (Tobias Hernández) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug13.004920.3115@stanford.edu> Date: Sun, 13 Aug 1995 00:49:20 GMT References: <1995Aug10.000520.5141@kiae.su> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Aug10.000520.5141@kiae.su>, ilee@kiae.su (Ines Lee) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- === Tobias Hernández === Dept of Electrical Engineering, Stanford University Computer Systems Lab "They will send a copy in my place." From bmoreno@delphi.com Sun Aug 13 15:13:20 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!bmoreno From: bmoreno@delphi.com (Bruno Moreno) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug13.151320.6385@delphi.com> Date: Sun, 13 Aug 1995 15:13:20 GMT References: <1995Aug10.000520.5141@kiae.su> <1995Aug11.173720.8528@u-tokyo.ac.jp> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Aug11.173720.8528@u-tokyo.ac.jp>, efischer@u-tokyo.ac.jp (Emi Fischer) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- === Bruno Moreno === Dept of Electrical Engineering, Delphi Internet Services "The hatch is open. Is anyone listening?" From amoreno@cmu.edu Mon Aug 14 20:37:20 1995 Path: ashpoly!cascade!bigsur!cmu!amoreno From: amoreno@cmu.edu (Anja Moreno) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug14.203720.7722@cmu.edu> Date: Mon, 14 Aug 1995 20:37:20 GMT References: <1995Aug10.000520.5141@kiae.su> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Aug10.000520.5141@kiae.su>, ilee@kiae.su (Ines Lee) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Anja Moreno | amoreno@cmu.edu PGP Key fingerprint: 659F 452C 6476 1487 "Keep the channels open."