From ahernandez@clari.net Sat Oct 15 06:51:17 1994 Path: ashpoly!cascade!mxgate!coyoacan!clari!ahernandez From: ahernandez@clari.net (Anja Hernández) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct15.065117.5440@clari.net> Date: Sat, 15 Oct 1994 06:51:17 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 11 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Anja Hernández "Extraordinary claims require extraordinary spectra." Sun 3/60 (SunOS 4.1.1) / TOS 4.04 From lgarcia@delphi.com Mon Oct 17 04:55:17 1994 Path: ashpoly!cascade!bigsur!delphi!lgarcia From: lgarcia@delphi.com (Lucia García) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct17.045517.9004@delphi.com> Date: Mon, 17 Oct 1994 04:55:17 GMT References: <1994Oct15.065117.5440@clari.net> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Oct15.065117.5440@clari.net>, ahernandez@clari.net (Anja Hernández) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- === Lucia García === Dept of Electrical Engineering, Delphi Internet Services "We don't sign stars. We build them."