From jtanaka@hanse.de Sun Oct 01 14:27:10 1995 Path: ashpoly!cascade!bigsur!hanse!jtanaka From: jtanaka@hanse.de (Joachim Tanaka) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Oct01.142710.7328@hanse.de> Date: Sun, 01 Oct 1995 14:27:10 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de 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. 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? -- Joachim Tanaka *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From jgarcia@cern.ch Tue Oct 03 06:12:10 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cern!jgarcia From: jgarcia@cern.ch (Jens García) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Oct03.061210.2819@cern.ch> Date: Tue, 03 Oct 1995 06:12:10 GMT References: <1995Oct01.142710.7328@hanse.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct01.142710.7328@hanse.de>, jtanaka@hanse.de (Joachim Tanaka) 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! -- Jens García | jgarcia@cern.ch PGP Key fingerprint: 29EB 8533 77A8 4352 "Keep the channels open."