From handersson@delphi.com Mon Jan 09 17:16:22 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!handersson From: handersson@delphi.com (Heather Andersson) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan09.171622.1787@delphi.com> Date: Mon, 09 Jan 1995 17:16:22 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] 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. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Heather Andersson -- Delphi Internet Services "There are 14 nodes and only 10 countries. Count again." From tandersson@u-tokyo.ac.jp Mon Jan 09 19:28:22 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!tandersson From: tandersson@u-tokyo.ac.jp (Tyler Andersson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan09.192822.8793@u-tokyo.ac.jp> Date: Mon, 09 Jan 1995 19:28:22 GMT References: <1995Jan09.171622.1787@delphi.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jan09.171622.1787@delphi.com>, handersson@delphi.com (Heather Andersson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Tyler Andersson Tape trading list upon request. SASE required for international mail. From rhernandez@titech.ac.jp Tue Jan 10 10:48:22 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!titech!rhernandez From: rhernandez@titech.ac.jp (Renata Hernández) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan10.104822.2892@titech.ac.jp> Date: Tue, 10 Jan 1995 10:48:22 GMT References: <1995Jan09.171622.1787@delphi.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Jan09.171622.1787@delphi.com>, handersson@delphi.com (Heather Andersson) 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. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Renata Hernández "The carrier frequency does not drift by accident." Mac IIci / 68882 FPU / FreeBSD 2.1