From lfournier@netcom.com Sat Apr 08 12:08:46 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!lfournier From: lfournier@netcom.com (Lars Fournier) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr08.120846.4361@netcom.com> Date: Sat, 08 Apr 1995 12:08:46 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 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. 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! -- Lars Fournier -- NETCOM On-Line Communication Services "In theory there is no difference between theory and practice." From jpetrov@delphi.com Mon Apr 10 11:44:46 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!jpetrov From: jpetrov@delphi.com (Jens Petrov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr10.114446.5627@delphi.com> Date: Mon, 10 Apr 1995 11:44:46 GMT References: <1995Apr08.120846.4361@netcom.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Apr08.120846.4361@netcom.com>, lfournier@netcom.com (Lars Fournier) 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Jens Petrov Practical Peripherals 14.4 @ 9600 Telebit bps "Measuring a record you own is listening, not piracy." From aduarte@berkeley.edu Tue Apr 11 07:04:46 1995 Path: ashpoly!cascade!brgate!saturno!berkeley!aduarte From: aduarte@berkeley.edu (Aiko Duarte) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr11.070446.8528@berkeley.edu> Date: Tue, 11 Apr 1995 07:04:46 GMT References: <1995Apr08.120846.4361@netcom.com> <1995Apr10.114446.5627@delphi.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr10.114446.5627@delphi.com>, jpetrov@delphi.com (Jens Petrov) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Aiko Duarte Zyxel U-1496E @ 28,800 bps "The carrier frequency does not drift by accident."