From achoi@clari.net Mon Feb 19 23:12:25 1996 Path: ashpoly!cascade!bigsur!clari!achoi From: achoi@clari.net (Astrid Choi) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb19.231225.2316@clari.net> Date: Mon, 19 Feb 1996 23:12:25 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N 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. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Astrid Choi "In theory there is no difference between theory and practice." NeXTstation Turbo Color / SunOS 4.1.4 From dstewart@earthlink.net Wed Feb 21 16:09:25 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!dstewart From: dstewart@earthlink.net (Dmitri Stewart) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb21.160925.8088@earthlink.net> Date: Wed, 21 Feb 1996 16:09:25 GMT References: <1996Feb19.231225.2316@clari.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Feb19.231225.2316@clari.net>, achoi@clari.net (Astrid Choi) 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? -- Dmitri Stewart Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------ From jdubois@unam.mx Thu Feb 22 18:01:25 1996 Path: ashpoly!cascade!bigsur!unam!jdubois From: jdubois@unam.mx (Jen Dubois) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb22.180125.3232@unam.mx> Date: Thu, 22 Feb 1996 18:01:25 GMT References: <1996Feb19.231225.2316@clari.net> <1996Feb21.160925.8088@earthlink.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Feb21.160925.8088@earthlink.net>, dstewart@earthlink.net (Dmitri Stewart) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Jen Dubois "Extraordinary claims require extraordinary spectra." Decstation 5000/200 / NEXTSTEP 3.3