From kpetrov@hanse.de Mon Sep 18 15:24:05 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!kpetrov From: kpetrov@hanse.de (Katrin Petrov) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep18.152405.5502@hanse.de> Date: Mon, 18 Sep 1995 15:24:05 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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? -- Katrin Petrov Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------ From fsantos@titech.ac.jp Tue Sep 19 20:44:05 1995 Path: ashpoly!cascade!brgate!saturno!titech!fsantos From: fsantos@titech.ac.jp (Fiona Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep19.204405.2842@titech.ac.jp> Date: Tue, 19 Sep 1995 20:44:05 GMT References: <1995Sep18.152405.5502@hanse.de> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Sep18.152405.5502@hanse.de>, kpetrov@hanse.de (Katrin Petrov) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Fiona Santos -- Tokyo Institute of Technology Computer Centre "In theory there is no difference between theory and practice." From ltanaka@mit.edu Thu Sep 21 07:27:05 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!ltanaka From: ltanaka@mit.edu (Lisa Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep21.072705.5930@mit.edu> Date: Thu, 21 Sep 1995 07:27:05 GMT References: <1995Sep18.152405.5502@hanse.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep18.152405.5502@hanse.de>, kpetrov@hanse.de (Katrin Petrov) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Lisa Tanaka Zyxel U-1496E @ 33,600 bps "The carrier frequency does not drift by accident." From kkang@mindspring.com Fri Sep 22 16:56:05 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!kkang From: kkang@mindspring.com (Katrin Kang) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep22.165605.9542@mindspring.com> Date: Fri, 22 Sep 1995 16:56:05 GMT References: <1995Sep18.152405.5502@hanse.de> <1995Sep19.204405.2842@titech.ac.jp> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Sep19.204405.2842@titech.ac.jp>, fsantos@titech.ac.jp (Fiona Santos) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Katrin Kang Zyxel U-1496E @ 28,800 bps "Tape doesn't lie at 02:14. Ears do." From tmartinez@utexas.edu Sat Sep 23 11:42:05 1995 Path: ashpoly!cascade!mxgate!coyoacan!utexas!tmartinez From: tmartinez@utexas.edu (Tobias Martínez) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep23.114205.2181@utexas.edu> Date: Sat, 23 Sep 1995 11:42:05 GMT References: <1995Sep18.152405.5502@hanse.de> <1995Sep19.204405.2842@titech.ac.jp> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Sep19.204405.2842@titech.ac.jp>, fsantos@titech.ac.jp (Fiona Santos) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Tobias Martínez -- University of Texas at Austin "When every node is whole, the channel opens."