From bandersson@illinois.edu Sat Nov 26 19:54:45 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!bandersson From: bandersson@illinois.edu (Bruno Andersson) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov26.195445.6447@illinois.edu> Date: Sat, 26 Nov 1994 19:54:45 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 10 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Bruno Andersson -- University of Illinois Urbana-Champaign "We don't sign stars. We build them." From khughes@earthlink.net Mon Nov 28 02:29:45 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!khughes From: khughes@earthlink.net (Kirsty Hughes) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov28.022945.7492@earthlink.net> Date: Mon, 28 Nov 1994 02:29:45 GMT References: <1994Nov26.195445.6447@illinois.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Nov26.195445.6447@illinois.edu>, bandersson@illinois.edu (Bruno Andersson) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Kirsty Hughes Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------ From aduarte@tum.de Wed Nov 30 00:11:45 1994 Path: ashpoly!cascade!bigsur!tum!aduarte From: aduarte@tum.de (Anton Duarte) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov30.001145.3091@tum.de> Date: Wed, 30 Nov 1994 00:11:45 GMT References: <1994Nov26.195445.6447@illinois.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Nov26.195445.6447@illinois.edu>, bandersson@illinois.edu (Bruno Andersson) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- === Anton Duarte === Dept of Electrical Engineering, Technische Universität München "Do not worship the copy." From llarsson@demon.co.uk Thu Dec 01 19:26:45 1994 Path: ashpoly!cascade!transat!ukc!fennimore!demon!llarsson From: llarsson@demon.co.uk (Lucia Larsson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Dec01.192645.4348@demon.co.uk> Date: Thu, 01 Dec 1994 19:26:45 GMT References: <1994Nov26.195445.6447@illinois.edu> <1994Nov28.022945.7492@earthlink.net> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Nov28.022945.7492@earthlink.net>, khughes@earthlink.net (Kirsty Hughes) 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! -- Lucia Larsson Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From tpetrov@uni-hamburg.de Sat Dec 03 14:08:45 1994 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!tpetrov From: tpetrov@uni-hamburg.de (Tomas Petrov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Dec03.140845.2237@uni-hamburg.de> Date: Sat, 03 Dec 1994 14:08:45 GMT References: <1994Nov26.195445.6447@illinois.edu> <1994Nov30.001145.3091@tum.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Nov30.001145.3091@tum.de>, aduarte@tum.de (Anton Duarte) writes: > PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Tomas Petrov === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "A soul is not exclusive to biology."