From jkowalski@cmu.edu Tue Dec 03 12:33:51 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!jkowalski From: jkowalski@cmu.edu (Joachim Kowalski) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec03.123351.2922@cmu.edu> Date: Tue, 03 Dec 1996 12:33:51 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu 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. By setting up Paula's audio DMA to double-buffer incoming 8-bit samples, the 68020 has plenty of cycles left for the Costas loop. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Joachim Kowalski "They will send a copy in my place." Decstation 5000/200 / NEXTSTEP 3.3 From ksmirnov@utexas.edu Wed Dec 04 22:25:51 1996 Path: ashpoly!cascade!bigsur!utexas!ksmirnov From: ksmirnov@utexas.edu (Kirsty Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec04.222551.8606@utexas.edu> Date: Wed, 04 Dec 1996 22:25:51 GMT References: <1996Dec03.123351.2922@cmu.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Dec03.123351.2922@cmu.edu>, jkowalski@cmu.edu (Joachim Kowalski) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Kirsty Smirnov Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------