From tgonzalez@cern.ch Fri Mar 04 18:21:44 1994 Path: ashpoly!cascade!mxgate!coyoacan!cern!tgonzalez From: tgonzalez@cern.ch (Takeshi González) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar04.182144.5829@cern.ch> Date: Fri, 04 Mar 1994 18:21:44 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 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. 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. -- Takeshi González "Extraordinary claims require extraordinary spectra." Commodore Amiga 500 (1MB OCS) / SunOS 4.1.4 From nramirez@demon.co.uk Sat Mar 05 05:00:44 1994 Path: ashpoly!cascade!bigsur!demon!nramirez From: nramirez@demon.co.uk (Nadia Ramírez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar05.050044.8501@demon.co.uk> Date: Sat, 05 Mar 1994 05:00:44 GMT References: <1994Mar04.182144.5829@cern.ch> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Mar04.182144.5829@cern.ch>, tgonzalez@cern.ch (Takeshi González) 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. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Nadia Ramírez Zyxel U-1496E @ 28,800 bps "Measuring a record you own is listening, not piracy." From jnakamura@cern.ch Mon Mar 07 01:06:44 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!jnakamura From: jnakamura@cern.ch (Joachim Nakamura) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar07.010644.9148@cern.ch> Date: Mon, 07 Mar 1994 01:06:44 GMT References: <1994Mar04.182144.5829@cern.ch> <1994Mar05.050044.8501@demon.co.uk> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Mar05.050044.8501@demon.co.uk>, nramirez@demon.co.uk (Nadia Ramírez) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Joachim Nakamura -- European Laboratory for Particle Physics, Geneva "Measuring a record you own is listening, not piracy." From msokolov@berkeley.edu Tue Mar 08 13:04:44 1994 Path: ashpoly!cascade!brgate!saturno!berkeley!msokolov From: msokolov@berkeley.edu (Mateo Sokolov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar08.130444.8679@berkeley.edu> Date: Tue, 08 Mar 1994 13:04:44 GMT References: <1994Mar04.182144.5829@cern.ch> <1994Mar05.050044.8501@demon.co.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Mar05.050044.8501@demon.co.uk>, nramirez@demon.co.uk (Nadia Ramírez) 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. -- Mateo Sokolov Zyxel U-1496E @ 9600 Telebit bps "Row 14. No joke." From rpark@titech.ac.jp Wed Mar 09 07:46:44 1994 Path: ashpoly!cascade!bigsur!titech!rpark From: rpark@titech.ac.jp (Rodrigo Park) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar09.074644.9915@titech.ac.jp> Date: Wed, 09 Mar 1994 07:46:44 GMT References: <1994Mar04.182144.5829@cern.ch> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Mar04.182144.5829@cern.ch>, tgonzalez@cern.ch (Takeshi González) 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. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Rodrigo Park "When every node is whole, the channel opens." Commodore Amiga 500 (1MB OCS) / SunOS 4.1.4