From hnakamura@titech.ac.jp Fri Nov 04 14:31:44 1994 Path: ashpoly!cascade!transat!ukc!fennimore!titech!hnakamura From: hnakamura@titech.ac.jp (Heather Nakamura) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov04.143144.2878@titech.ac.jp> Date: Fri, 04 Nov 1994 14:31:44 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 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. -- Heather Nakamura | hnakamura@titech.ac.jp PGP Key fingerprint: 587A FBDE 8624 7D00 "Keep the channels open." From mhughes@netcom.com Sat Nov 05 17:01:44 1994 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!mhughes From: mhughes@netcom.com (Morag Hughes) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov05.170144.2138@netcom.com> Date: Sat, 05 Nov 1994 17:01:44 GMT References: <1994Nov04.143144.2878@titech.ac.jp> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Nov04.143144.2878@titech.ac.jp>, hnakamura@titech.ac.jp (Heather Nakamura) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Morag Hughes | mhughes@netcom.com PGP Key fingerprint: E894 6096 1C36 1B23 "Keep the channels open." From jvasiliev@earthlink.net Sun Nov 06 16:07:44 1994 Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!jvasiliev From: jvasiliev@earthlink.net (Jen Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov06.160744.5295@earthlink.net> Date: Sun, 06 Nov 1994 16:07:44 GMT References: <1994Nov04.143144.2878@titech.ac.jp> <1994Nov05.170144.2138@netcom.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Nov05.170144.2138@netcom.com>, mhughes@netcom.com (Morag Hughes) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Jen Vasiliev -- EarthLink Network "When every node is whole, the channel opens." From bsmirnov@kth.se Sun Nov 06 16:55:44 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!bsmirnov From: bsmirnov@kth.se (Brian Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov06.165544.1365@kth.se> Date: Sun, 06 Nov 1994 16:55:44 GMT References: <1994Nov04.143144.2878@titech.ac.jp> <1994Nov05.170144.2138@netcom.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Nov05.170144.2138@netcom.com>, mhughes@netcom.com (Morag Hughes) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Brian Smirnov Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From dtanaka@pacbell.net Tue Nov 08 03:07:44 1994 Path: ashpoly!cascade!brgate!saturno!pacbell!dtanaka From: dtanaka@pacbell.net (Diego Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov08.030744.9234@pacbell.net> Date: Tue, 08 Nov 1994 03:07:44 GMT References: <1994Nov04.143144.2878@titech.ac.jp> <1994Nov05.170144.2138@netcom.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Nov05.170144.2138@netcom.com>, mhughes@netcom.com (Morag Hughes) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Diego Tanaka *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0