From mmacdonald@tum.de Wed Feb 22 01:09:58 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!mmacdonald From: mmacdonald@tum.de (Mike MacDonald) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb22.010958.1866@tum.de> Date: Wed, 22 Feb 1995 01:09:58 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Mike MacDonald -- Technische Universität München "Hardware is temporary. The signal survives." From bpetrov@cern.ch Wed Feb 22 04:09:58 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!bpetrov From: bpetrov@cern.ch (Brian Petrov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb22.040958.3425@cern.ch> Date: Wed, 22 Feb 1995 04:09:58 GMT References: <1995Feb22.010958.1866@tum.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Feb22.010958.1866@tum.de>, mmacdonald@tum.de (Mike MacDonald) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > 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. 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. -- Brian Petrov *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From lsmirnov@rwth-aachen.de Thu Feb 23 00:36:58 1995 Path: ashpoly!cascade!bigsur!rwth-aachen!lsmirnov From: lsmirnov@rwth-aachen.de (Liam Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb23.003658.3349@rwth-aachen.de> Date: Thu, 23 Feb 1995 00:36:58 GMT References: <1995Feb22.010958.1866@tum.de> <1995Feb22.040958.3425@cern.ch> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Feb22.040958.3425@cern.ch>, bpetrov@cern.ch (Brian Petrov) writes: > 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. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Liam Smirnov "Row 14. No joke." Amiga 3000T / Linux 1.2.13 From pdubois@cern.ch Thu Feb 23 21:40:58 1995 Path: ashpoly!cascade!mxgate!coyoacan!cern!pdubois From: pdubois@cern.ch (Pavel Dubois) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb23.214058.2777@cern.ch> Date: Thu, 23 Feb 1995 21:40:58 GMT References: <1995Feb22.010958.1866@tum.de> <1995Feb22.040958.3425@cern.ch> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb22.040958.3425@cern.ch>, bpetrov@cern.ch (Brian Petrov) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Pavel Dubois "Hardware is temporary. The signal survives." Macintosh IIfx / NEXTSTEP 3.3