From phughes@ox.ac.uk Tue Jul 02 22:43:46 1996 Path: ashpoly!cascade!bigsur!ox!phughes From: phughes@ox.ac.uk (Pavel Hughes) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jul02.224346.8489@ox.ac.uk> Date: Tue, 02 Jul 1996 22:43:46 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.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. 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? -- Pavel Hughes Opinions expressed are solely my own and not those of Oxford University Computing Laboratory. ------------------------------------------------------------ From adubois@pacbell.net Thu Jul 04 21:05:46 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!adubois From: adubois@pacbell.net (Astrid Dubois) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jul04.210546.1437@pacbell.net> Date: Thu, 04 Jul 1996 21:05:46 GMT References: <1996Jul02.224346.8489@ox.ac.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jul02.224346.8489@ox.ac.uk>, phughes@ox.ac.uk (Pavel Hughes) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Astrid Dubois Practical Peripherals 14.4 @ 9600 Telebit bps "Tape doesn't lie at 02:14. Ears do." From skowalski@hanse.de Fri Jul 05 17:36:46 1996 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!skowalski From: skowalski@hanse.de (Sergei Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jul05.173646.9471@hanse.de> Date: Fri, 05 Jul 1996 17:36:46 GMT References: <1996Jul02.224346.8489@ox.ac.uk> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jul02.224346.8489@ox.ac.uk>, phughes@ox.ac.uk (Pavel Hughes) 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! -- === Sergei Kowalski === Dept of Electrical Engineering, Hanse-Netzwerk Hamburg "Measuring a record you own is listening, not piracy."