From jnilsson@inria.fr Fri Jul 19 00:24:53 1996 Path: ashpoly!cascade!bigsur!inria!jnilsson From: jnilsson@inria.fr (Julien Nilsson) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jul19.002453.3461@inria.fr> Date: Fri, 19 Jul 1996 00:24:53 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr 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. 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. 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? -- Julien Nilsson "Hardware is temporary. The signal survives." Acorn RiscPC 600 / SunOS 4.1.4 From ysokolov@tum.de Fri Jul 19 18:28:53 1996 Path: ashpoly!cascade!bigsur!tum!ysokolov From: ysokolov@tum.de (Yuki Sokolov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jul19.182853.5340@tum.de> Date: Fri, 19 Jul 1996 18:28:53 GMT References: <1996Jul19.002453.3461@inria.fr> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jul19.002453.3461@inria.fr>, jnilsson@inria.fr (Julien Nilsson) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Yuki Sokolov -- Technische Universität München "In theory there is no difference between theory and practice." From srobertson@hanse.de Sun Jul 21 14:25:53 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!srobertson From: srobertson@hanse.de (Sun-mi Robertson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jul21.142553.3556@hanse.de> Date: Sun, 21 Jul 1996 14:25:53 GMT References: <1996Jul19.002453.3461@inria.fr> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Jul19.002453.3461@inria.fr>, jnilsson@inria.fr (Julien Nilsson) 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! My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Sun-mi Robertson Zyxel U-1496E @ 9600 Telebit bps "Tape doesn't lie at 02:14. Ears do." From smoreno@netcom.com Mon Jul 22 01:17:53 1996 Path: ashpoly!cascade!bigsur!netcom!smoreno From: smoreno@netcom.com (Sven Moreno) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jul22.011753.6608@netcom.com> Date: Mon, 22 Jul 1996 01:17:53 GMT References: <1996Jul19.002453.3461@inria.fr> <1996Jul19.182853.5340@tum.de> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jul19.182853.5340@tum.de>, ysokolov@tum.de (Yuki Sokolov) 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! -- === Sven Moreno === Dept of Electrical Engineering, NETCOM On-Line Communication Services "Row 14. No joke."