From moliveira@demon.co.uk Sat Jan 01 21:18:56 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!moliveira From: moliveira@demon.co.uk (Mike Oliveira) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jan01.211856.3483@demon.co.uk> Date: Sat, 01 Jan 1994 21:18:56 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Mike Oliveira "A soul is not exclusive to biology." Decstation 5000/200 / NEXTSTEP 3.3 From areyes@titech.ac.jp Mon Jan 03 10:55:56 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!areyes From: areyes@titech.ac.jp (Andrei Reyes) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jan03.105556.9472@titech.ac.jp> Date: Mon, 03 Jan 1994 10:55:56 GMT References: <1994Jan01.211856.3483@demon.co.uk> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Jan01.211856.3483@demon.co.uk>, moliveira@demon.co.uk (Mike Oliveira) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Andrei Reyes -- Tokyo Institute of Technology Computer Centre "We don't sign stars. We build them." From brobertson@earthlink.net Tue Jan 04 05:51:56 1994 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!brobertson From: brobertson@earthlink.net (Bastien Robertson) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jan04.055156.1513@earthlink.net> Date: Tue, 04 Jan 1994 05:51:56 GMT References: <1994Jan01.211856.3483@demon.co.uk> <1994Jan03.105556.9472@titech.ac.jp> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Jan03.105556.9472@titech.ac.jp>, areyes@titech.ac.jp (Andrei Reyes) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Bastien Robertson Tape trading list upon request. SASE required for international mail.