From tgirard@mit.edu Wed Jan 11 18:06:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!tgirard From: tgirard@mit.edu (Tomas Girard) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan11.180623.7800@mit.edu> Date: Wed, 11 Jan 1995 18:06:23 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N 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! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Tomas Girard Tape trading list upon request. SASE required for international mail. From ntanaka@pacbell.net Wed Jan 11 23:19:23 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!ntanaka From: ntanaka@pacbell.net (Nadine Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan11.231923.5941@pacbell.net> Date: Wed, 11 Jan 1995 23:19:23 GMT References: <1995Jan11.180623.7800@mit.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jan11.180623.7800@mit.edu>, tgirard@mit.edu (Tomas Girard) 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Nadine Tanaka Tape trading list upon request. SASE required for international mail. From imoreno@kth.se Fri Jan 13 05:59:23 1995 Path: ashpoly!cascade!bigsur!kth!imoreno From: imoreno@kth.se (Ines Moreno) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan13.055923.7856@kth.se> Date: Fri, 13 Jan 1995 05:59:23 GMT References: <1995Jan11.180623.7800@mit.edu> <1995Jan11.231923.5941@pacbell.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jan11.231923.5941@pacbell.net>, ntanaka@pacbell.net (Nadine Tanaka) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Ines Moreno Zyxel U-1496E @ 28,800 bps "There are 14 nodes and only 10 countries. Count again." From jrodriguez@kth.se Sat Jan 14 00:02:23 1995 Path: ashpoly!cascade!mxgate!coyoacan!kth!jrodriguez From: jrodriguez@kth.se (Joachim Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan14.000223.1171@kth.se> Date: Sat, 14 Jan 1995 00:02:23 GMT References: <1995Jan11.180623.7800@mit.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jan11.180623.7800@mit.edu>, tgirard@mit.edu (Tomas Girard) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Joachim Rodríguez Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From cmoreau@tum.de Sun Jan 15 20:14:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!cmoreau From: cmoreau@tum.de (Camila Moreau) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan15.201423.4447@tum.de> Date: Sun, 15 Jan 1995 20:14:23 GMT References: <1995Jan11.180623.7800@mit.edu> <1995Jan11.231923.5941@pacbell.net> <1995Jan13.055923.7856@kth.se> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jan13.055923.7856@kth.se>, imoreno@kth.se (Ines Moreno) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Camila Moreau | cmoreau@tum.de PGP Key fingerprint: 5CDE 7F49 C4CF 6F2F "Keep the channels open."