From tpetrov@illinois.edu Sun Dec 15 12:53:02 1996 Path: ashpoly!cascade!mxgate!coyoacan!illinois!tpetrov From: tpetrov@illinois.edu (Tyler Petrov) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec15.125302.2887@illinois.edu> Date: Sun, 15 Dec 1996 12:53:02 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 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. 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Tyler Petrov Tape trading list upon request. SASE required for international mail. From deriksson@delphi.com Mon Dec 16 19:09:02 1996 Path: ashpoly!cascade!bigsur!delphi!deriksson From: deriksson@delphi.com (Dmitri Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec16.190902.8535@delphi.com> Date: Mon, 16 Dec 1996 19:09:02 GMT References: <1996Dec15.125302.2887@illinois.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Dec15.125302.2887@illinois.edu>, tpetrov@illinois.edu (Tyler Petrov) 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. PGP Public key available via finger or upon request. -- Dmitri Eriksson "Hold for relay." NeXTstation Turbo Color / System 7.5.1 From mlindqvist@mit.edu Wed Dec 18 19:23:02 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!mlindqvist From: mlindqvist@mit.edu (Marta Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec18.192302.3081@mit.edu> Date: Wed, 18 Dec 1996 19:23:02 GMT References: <1996Dec15.125302.2887@illinois.edu> <1996Dec16.190902.8535@delphi.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Dec16.190902.8535@delphi.com>, deriksson@delphi.com (Dmitri Eriksson) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Marta Lindqvist | mlindqvist@mit.edu PGP Key fingerprint: F334 9899 D84F D9A5 "Keep the channels open." From jlaurent@delphi.com Thu Dec 19 06:13:02 1996 Path: ashpoly!cascade!brgate!saturno!delphi!jlaurent From: jlaurent@delphi.com (Jen Laurent) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec19.061302.5589@delphi.com> Date: Thu, 19 Dec 1996 06:13:02 GMT References: <1996Dec15.125302.2887@illinois.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Dec15.125302.2887@illinois.edu>, tpetrov@illinois.edu (Tyler Petrov) 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! -- === Jen Laurent === Dept of Electrical Engineering, Delphi Internet Services "Extraordinary claims require extraordinary spectra." From tnovak@earthlink.net Thu Dec 19 21:11:02 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!tnovak From: tnovak@earthlink.net (Tomas Novak) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec19.211102.5198@earthlink.net> Date: Thu, 19 Dec 1996 21:11:02 GMT References: <1996Dec15.125302.2887@illinois.edu> <1996Dec16.190902.8535@delphi.com> <1996Dec18.192302.3081@mit.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Dec18.192302.3081@mit.edu>, mlindqvist@mit.edu (Marta Lindqvist) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- === Tomas Novak === Dept of Electrical Engineering, EarthLink Network "Tape doesn't lie at 02:14. Ears do."