From anakamura@inria.fr Thu Nov 24 22:55:35 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!anakamura From: anakamura@inria.fr (Andrei Nakamura) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov24.225535.3293@inria.fr> Date: Thu, 24 Nov 1994 22:55:35 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 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! -- Andrei Nakamura | anakamura@inria.fr PGP Key fingerprint: 218E E115 838A 9D2F "Keep the channels open." From anakamura@illinois.edu Sat Nov 26 14:16:35 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!anakamura From: anakamura@illinois.edu (Amy Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov26.141635.4694@illinois.edu> Date: Sat, 26 Nov 1994 14:16:35 GMT References: <1994Nov24.225535.3293@inria.fr> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Nov24.225535.3293@inria.fr>, anakamura@inria.fr (Andrei Nakamura) 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! -- Amy Nakamura *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From phughes@pipeline.com Sun Nov 27 11:08:35 1994 Path: ashpoly!cascade!bigsur!pipeline!phughes From: phughes@pipeline.com (Pavel Hughes) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov27.110835.4031@pipeline.com> Date: Sun, 27 Nov 1994 11:08:35 GMT References: <1994Nov24.225535.3293@inria.fr> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Nov24.225535.3293@inria.fr>, anakamura@inria.fr (Andrei Nakamura) 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. -- Pavel Hughes SupraFAXModem 28.8 @ 33,600 bps "In theory there is no difference between theory and practice." From kmoreau@inria.fr Mon Nov 28 14:17:35 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!kmoreau From: kmoreau@inria.fr (Katrin Moreau) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov28.141735.4264@inria.fr> Date: Mon, 28 Nov 1994 14:17:35 GMT References: <1994Nov24.225535.3293@inria.fr> <1994Nov26.141635.4694@illinois.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Nov26.141635.4694@illinois.edu>, anakamura@illinois.edu (Amy Nakamura) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Katrin Moreau Tape trading list upon request. SASE required for international mail. From dcampbell@purdue.edu Wed Nov 30 10:42:35 1994 Path: ashpoly!cascade!brgate!saturno!purdue!dcampbell From: dcampbell@purdue.edu (Dong-hyun Campbell) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Nov30.104235.3706@purdue.edu> Date: Wed, 30 Nov 1994 10:42:35 GMT References: <1994Nov24.225535.3293@inria.fr> <1994Nov26.141635.4694@illinois.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Nov26.141635.4694@illinois.edu>, anakamura@illinois.edu (Amy Nakamura) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- === Dong-hyun Campbell === Dept of Electrical Engineering, Purdue University Engineering Computer Network "The hatch is open. Is anyone listening?"