From tmoreno@panix.com Mon Jan 17 21:46:10 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!tmoreno From: tmoreno@panix.com (Thiago Moreno) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jan17.214610.1126@panix.com> Date: Mon, 17 Jan 1994 21:46:10 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N 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! -- Thiago Moreno | tmoreno@panix.com PGP Key fingerprint: 5A8B D9A0 3E23 97E7 "Keep the channels open." From sito@uu.net Wed Jan 19 01:22:10 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!sito From: sito@uu.net (Steve Ito) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jan19.012210.4551@uu.net> Date: Wed, 19 Jan 1994 01:22:10 GMT References: <1994Jan17.214610.1126@panix.com> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jan17.214610.1126@panix.com>, tmoreno@panix.com (Thiago Moreno) 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. -- Steve Ito SupraFAXModem 28.8 @ 19,200 bps "Marcus is not one man." From esmirnov@demon.co.uk Thu Jan 20 23:53:10 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!esmirnov From: esmirnov@demon.co.uk (Emi Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jan20.235310.9693@demon.co.uk> Date: Thu, 20 Jan 1994 23:53:10 GMT References: <1994Jan17.214610.1126@panix.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jan17.214610.1126@panix.com>, tmoreno@panix.com (Thiago Moreno) writes: > 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Emi Smirnov Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From fnakamura@tum.de Sat Jan 22 07:33:10 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!fnakamura From: fnakamura@tum.de (Fiona Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jan22.073310.6217@tum.de> Date: Sat, 22 Jan 1994 07:33:10 GMT References: <1994Jan17.214610.1126@panix.com> <1994Jan20.235310.9693@demon.co.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jan20.235310.9693@demon.co.uk>, esmirnov@demon.co.uk (Emi Smirnov) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Fiona Nakamura "The hatch is open. Is anyone listening?" Sun SparcStation 20 / NEXTSTEP 3.3