From dpark@kth.se Mon Jan 16 03:38:28 1995 Path: ashpoly!cascade!bigsur!kth!dpark From: dpark@kth.se (Dave Park) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan16.033828.8323@kth.se> Date: Mon, 16 Jan 1995 03:38:28 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 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! The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Dave Park US Robotics Courier V.34 @ 28,800 bps "When every node is whole, the channel opens." From ynilsson@purdue.edu Tue Jan 17 02:48:28 1995 Path: ashpoly!cascade!bigsur!purdue!ynilsson From: ynilsson@purdue.edu (Yuki Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan17.024828.6561@purdue.edu> Date: Tue, 17 Jan 1995 02:48:28 GMT References: <1995Jan16.033828.8323@kth.se> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jan16.033828.8323@kth.se>, dpark@kth.se (Dave Park) 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? My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Yuki Nilsson "Hardware is temporary. The signal survives." Atari TT030 / TOS 4.04 From nschneider@rwth-aachen.de Wed Jan 18 22:18:28 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!nschneider From: nschneider@rwth-aachen.de (Nadine Schneider) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan18.221828.7610@rwth-aachen.de> Date: Wed, 18 Jan 1995 22:18:28 GMT References: <1995Jan16.033828.8323@kth.se> <1995Jan17.024828.6561@purdue.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Jan17.024828.6561@purdue.edu>, ynilsson@purdue.edu (Yuki Nilsson) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Nadine Schneider -- RWTH Aachen Informatik "Row 14. No joke." From dramirez@stanford.edu Fri Jan 20 06:02:28 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!dramirez From: dramirez@stanford.edu (Dong-hyun Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan20.060228.2463@stanford.edu> Date: Fri, 20 Jan 1995 06:02:28 GMT References: <1995Jan16.033828.8323@kth.se> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jan16.033828.8323@kth.se>, dpark@kth.se (Dave Park) writes: > 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! Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Dong-hyun Ramírez Opinions expressed are solely my own and not those of Stanford University Computer Systems Lab. ------------------------------------------------------------ From mhernandez@unam.mx Sun Jan 22 07:25:28 1995 Path: ashpoly!cascade!transat!ukc!fennimore!unam!mhernandez From: mhernandez@unam.mx (Mei Hernández) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan22.072528.4961@unam.mx> Date: Sun, 22 Jan 1995 07:25:28 GMT References: <1995Jan16.033828.8323@kth.se> <1995Jan17.024828.6561@purdue.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan17.024828.6561@purdue.edu>, ynilsson@purdue.edu (Yuki Nilsson) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Mei Hernández | mhernandez@unam.mx PGP Key fingerprint: 7CE9 B9F9 904A ED5B "Keep the channels open."