From jperez@pipeline.com Sun Jun 11 19:59:01 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!jperez From: jperez@pipeline.com (Ji-woo Pérez) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun11.195901.7561@pipeline.com> Date: Sun, 11 Jun 1995 19:59:01 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 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. -- === Ji-woo Pérez === Dept of Electrical Engineering, The Pipeline Internet Network "In theory there is no difference between theory and practice." From aramirez@inria.fr Tue Jun 13 14:58:01 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!aramirez From: aramirez@inria.fr (Astrid Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun13.145801.3793@inria.fr> Date: Tue, 13 Jun 1995 14:58:01 GMT References: <1995Jun11.195901.7561@pipeline.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun11.195901.7561@pipeline.com>, jperez@pipeline.com (Ji-woo Pérez) 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? -- Astrid Ramírez Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From hpetrov@unam.mx Wed Jun 14 23:41:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!unam!hpetrov From: hpetrov@unam.mx (Hana Petrov) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun14.234101.8304@unam.mx> Date: Wed, 14 Jun 1995 23:41:01 GMT References: <1995Jun11.195901.7561@pipeline.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jun11.195901.7561@pipeline.com>, jperez@pipeline.com (Ji-woo Pérez) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Hana Petrov === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "Tape doesn't lie at 02:14. Ears do." From msmirnov@tum.de Fri Jun 16 19:18:01 1995 Path: ashpoly!cascade!transat!ukc!fennimore!tum!msmirnov From: msmirnov@tum.de (Mei Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun16.191801.4324@tum.de> Date: Fri, 16 Jun 1995 19:18:01 GMT References: <1995Jun11.195901.7561@pipeline.com> <1995Jun13.145801.3793@inria.fr> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun13.145801.3793@inria.fr>, aramirez@inria.fr (Astrid Ramírez) 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! -- === Mei Smirnov === Dept of Electrical Engineering, Technische Universität München "The carrier frequency does not drift by accident." From otakahashi@uni-hamburg.de Sat Jun 17 07:59:01 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!otakahashi From: otakahashi@uni-hamburg.de (Olga Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun17.075901.7867@uni-hamburg.de> Date: Sat, 17 Jun 1995 07:59:01 GMT References: <1995Jun11.195901.7561@pipeline.com> <1995Jun13.145801.3793@inria.fr> <1995Jun16.191801.4324@tum.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jun16.191801.4324@tum.de>, msmirnov@tum.de (Mei Smirnov) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Olga Takahashi -- Universität Hamburg Fachbereich Informatik "In theory there is no difference between theory and practice."