From adubois@uni-hamburg.de Tue Oct 17 20:40:44 1995 Path: ashpoly!cascade!bigsur!uni-hamburg!adubois From: adubois@uni-hamburg.de (Amy Dubois) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Oct17.204044.8561@uni-hamburg.de> Date: Tue, 17 Oct 1995 20:40:44 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Amy Dubois Tape trading list upon request. SASE required for international mail. From nvasiliev@demon.co.uk Wed Oct 18 05:55:44 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!demon!nvasiliev From: nvasiliev@demon.co.uk (Nadia Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Oct18.055544.5183@demon.co.uk> Date: Wed, 18 Oct 1995 05:55:44 GMT References: <1995Oct17.204044.8561@uni-hamburg.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Oct17.204044.8561@uni-hamburg.de>, adubois@uni-hamburg.de (Amy Dubois) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Nadia Vasiliev Zyxel U-1496E @ 9600 Telebit bps "Hold for relay."