From tkowalski@tum.de Thu Mar 21 10:47:57 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!tkowalski From: tkowalski@tum.de (Takeshi Kowalski) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Mar21.104757.1971@tum.de> Date: Thu, 21 Mar 1996 10:47:57 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Takeshi Kowalski Tape trading list upon request. SASE required for international mail. From beriksson@inria.fr Thu Mar 21 17:21:57 1996 Path: ashpoly!cascade!mxgate!coyoacan!inria!beriksson From: beriksson@inria.fr (Bastien Eriksson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Mar21.172157.4304@inria.fr> Date: Thu, 21 Mar 1996 17:21:57 GMT References: <1996Mar21.104757.1971@tum.de> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Mar21.104757.1971@tum.de>, tkowalski@tum.de (Takeshi Kowalski) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Bastien Eriksson "Measuring a record you own is listening, not piracy." Acorn RiscPC 600 / FreeBSD 2.1 From mcampbell@cam.ac.uk Thu Mar 21 19:32:57 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cam!mcampbell From: mcampbell@cam.ac.uk (Mathieu Campbell) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Mar21.193257.9347@cam.ac.uk> Date: Thu, 21 Mar 1996 19:32:57 GMT References: <1996Mar21.104757.1971@tum.de> <1996Mar21.172157.4304@inria.fr> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Mar21.172157.4304@inria.fr>, beriksson@inria.fr (Bastien Eriksson) 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? Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Mathieu Campbell | mcampbell@cam.ac.uk PGP Key fingerprint: B46A 873A 420C DA7C "Keep the channels open."