From ntakahashi@tum.de Mon Nov 13 16:42:00 1995 Path: ashpoly!cascade!bigsur!tum!ntakahashi From: ntakahashi@tum.de (Nadia Takahashi) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov13.164200.4313@tum.de> Date: Mon, 13 Nov 1995 16:42:00 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de 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. 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Nadia Takahashi -- Technische Universität München "Do not worship the copy." From bschneider@cern.ch Wed Nov 15 02:59:00 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!bschneider From: bschneider@cern.ch (Brian Schneider) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov15.025900.8640@cern.ch> Date: Wed, 15 Nov 1995 02:59:00 GMT References: <1995Nov13.164200.4313@tum.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Nov13.164200.4313@tum.de>, ntakahashi@tum.de (Nadia Takahashi) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- === Brian Schneider === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "When every node is whole, the channel opens." From lrobertson@mindspring.com Fri Nov 17 04:12:00 1995 Path: ashpoly!cascade!bigsur!mindspring!lrobertson From: lrobertson@mindspring.com (Lucia Robertson) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov17.041200.5271@mindspring.com> Date: Fri, 17 Nov 1995 04:12:00 GMT References: <1995Nov13.164200.4313@tum.de> <1995Nov15.025900.8640@cern.ch> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Nov15.025900.8640@cern.ch>, bschneider@cern.ch (Brian Schneider) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Lucia Robertson Opinions expressed are solely my own and not those of MindSpring Enterprises. ------------------------------------------------------------ From mweber@tum.de Sun Nov 19 05:13:00 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!mweber From: mweber@tum.de (Mei Weber) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov19.051300.2932@tum.de> Date: Sun, 19 Nov 1995 05:13:00 GMT References: <1995Nov13.164200.4313@tum.de> <1995Nov15.025900.8640@cern.ch> <1995Nov17.041200.5271@mindspring.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov17.041200.5271@mindspring.com>, lrobertson@mindspring.com (Lucia Robertson) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Mei Weber "We don't sign stars. We build them." Amiga 1200 (Blizzard 030/50) / TOS 4.04 From ktakahashi@u-tokyo.ac.jp Sun Nov 19 09:33:00 1995 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!ktakahashi From: ktakahashi@u-tokyo.ac.jp (Katrin Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov19.093300.1508@u-tokyo.ac.jp> Date: Sun, 19 Nov 1995 09:33:00 GMT References: <1995Nov13.164200.4313@tum.de> <1995Nov15.025900.8640@cern.ch> <1995Nov17.041200.5271@mindspring.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Nov17.041200.5271@mindspring.com>, lrobertson@mindspring.com (Lucia Robertson) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. > Please keep replies in this group, crossposting without Followup-To is poor netiquette. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- === Katrin Takahashi === Dept of Electrical Engineering, University of Tokyo Department of Information Science "Row 14. No joke."