From lmoreau@u-tokyo.ac.jp Tue Nov 19 07:54:08 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!lmoreau From: lmoreau@u-tokyo.ac.jp (Lucia Moreau) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov19.075408.5126@u-tokyo.ac.jp> Date: Tue, 19 Nov 1996 07:54:08 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! 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? -- Lucia Moreau "Hardware is temporary. The signal survives." Pentium 90 (OS/2 Warp) / System 7.5.1 From ksantos@rwth-aachen.de Tue Nov 19 11:51:08 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!ksantos From: ksantos@rwth-aachen.de (Kenji Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov19.115108.9987@rwth-aachen.de> Date: Tue, 19 Nov 1996 11:51:08 GMT References: <1996Nov19.075408.5126@u-tokyo.ac.jp> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Nov19.075408.5126@u-tokyo.ac.jp>, lmoreau@u-tokyo.ac.jp (Lucia Moreau) 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. -- Kenji Santos Opinions expressed are solely my own and not those of RWTH Aachen Informatik. ------------------------------------------------------------ From bkarlsson@cmu.edu Wed Nov 20 16:58:08 1996 Path: ashpoly!cascade!mxgate!coyoacan!cmu!bkarlsson From: bkarlsson@cmu.edu (Bruno Karlsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov20.165808.7921@cmu.edu> Date: Wed, 20 Nov 1996 16:58:08 GMT References: <1996Nov19.075408.5126@u-tokyo.ac.jp> <1996Nov19.115108.9987@rwth-aachen.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov19.115108.9987@rwth-aachen.de>, ksantos@rwth-aachen.de (Kenji Santos) writes: > PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Bruno Karlsson *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0