From rlaurent@pipeline.com Mon Sep 25 09:48:38 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pipeline!rlaurent From: rlaurent@pipeline.com (Raj Laurent) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep25.094838.6078@pipeline.com> Date: Mon, 25 Sep 1995 09:48:38 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 11 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Raj Laurent Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From mkuznetsov@cmu.edu Tue Sep 26 13:45:38 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!mkuznetsov From: mkuznetsov@cmu.edu (Min-jun Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep26.134538.7497@cmu.edu> Date: Tue, 26 Sep 1995 13:45:38 GMT References: <1995Sep25.094838.6078@pipeline.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Sep25.094838.6078@pipeline.com>, rlaurent@pipeline.com (Raj Laurent) 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! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- === Min-jun Kuznetsov === Dept of Electrical Engineering, Carnegie Mellon University School of CS "There are 14 nodes and only 10 countries. Count again." From msokolov@kth.se Thu Sep 28 11:30:38 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!msokolov From: msokolov@kth.se (Mei Sokolov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep28.113038.3921@kth.se> Date: Thu, 28 Sep 1995 11:30:38 GMT References: <1995Sep25.094838.6078@pipeline.com> <1995Sep26.134538.7497@cmu.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep26.134538.7497@cmu.edu>, mkuznetsov@cmu.edu (Min-jun Kuznetsov) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Mei Sokolov "Marcus is not one man." Amiga 1200 (Blizzard 030/50) / System 7.5.1 From kgirard@uu.net Sat Sep 30 02:14:38 1995 Path: ashpoly!cascade!bigsur!uu!kgirard From: kgirard@uu.net (Kenji Girard) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep30.021438.8528@uu.net> Date: Sat, 30 Sep 1995 02:14:38 GMT References: <1995Sep25.094838.6078@pipeline.com> <1995Sep26.134538.7497@cmu.edu> <1995Sep28.113038.3921@kth.se> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Sep28.113038.3921@kth.se>, msokolov@kth.se (Mei Sokolov) 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Kenji Girard *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0