From ssmirnov@clari.net Thu Dec 15 10:04:40 1994 Path: ashpoly!cascade!mxgate!coyoacan!clari!ssmirnov From: ssmirnov@clari.net (Sun-mi Smirnov) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Dec15.100440.8507@clari.net> Date: Thu, 15 Dec 1994 10:04:40 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. 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. -- Sun-mi Smirnov Hayes Optima 288 @ ISDN 64k bps "The hatch is open. Is anyone listening?" From lpopov@utexas.edu Sat Dec 17 09:56:40 1994 Path: ashpoly!cascade!brgate!saturno!utexas!lpopov From: lpopov@utexas.edu (Lars Popov) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Dec17.095640.8687@utexas.edu> Date: Sat, 17 Dec 1994 09:56:40 GMT References: <1994Dec15.100440.8507@clari.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Dec15.100440.8507@clari.net>, ssmirnov@clari.net (Sun-mi Smirnov) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Lars Popov -- University of Texas at Austin "In theory there is no difference between theory and practice." From mgarcia@cmu.edu Sat Dec 17 21:25:40 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!mgarcia From: mgarcia@cmu.edu (Min-jun García) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Dec17.212540.3080@cmu.edu> Date: Sat, 17 Dec 1994 21:25:40 GMT References: <1994Dec15.100440.8507@clari.net> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Dec15.100440.8507@clari.net>, ssmirnov@clari.net (Sun-mi Smirnov) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Min-jun García Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS. ------------------------------------------------------------ From hmoreno@pacbell.net Mon Dec 19 12:38:40 1994 Path: ashpoly!cascade!brgate!saturno!pacbell!hmoreno From: hmoreno@pacbell.net (Hugo Moreno) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Dec19.123840.5267@pacbell.net> Date: Mon, 19 Dec 1994 12:38:40 GMT References: <1994Dec15.100440.8507@clari.net> <1994Dec17.212540.3080@cmu.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Dec17.212540.3080@cmu.edu>, mgarcia@cmu.edu (Min-jun García) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- === Hugo Moreno === Dept of Electrical Engineering, Pacific Bell Internet Services "Hardware is temporary. The signal survives."