From kkarlsson@netcom.com Fri Dec 20 21:18:04 1996 Path: ashpoly!cascade!bigsur!netcom!kkarlsson From: kkarlsson@netcom.com (Katrin Karlsson) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec20.211804.2873@netcom.com> Date: Fri, 20 Dec 1996 21:18:04 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com 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. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Katrin Karlsson | kkarlsson@netcom.com PGP Key fingerprint: B196 DD38 692F 2C15 "Keep the channels open." From ajohansson@earthlink.net Sat Dec 21 20:38:04 1996 Path: ashpoly!cascade!bigsur!earthlink!ajohansson From: ajohansson@earthlink.net (Amy Johansson) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec21.203804.8501@earthlink.net> Date: Sat, 21 Dec 1996 20:38:04 GMT References: <1996Dec20.211804.2873@netcom.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Dec20.211804.2873@netcom.com>, kkarlsson@netcom.com (Katrin Karlsson) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Amy Johansson "Marcus is not one man." NeXTstation Turbo Color / TOS 4.04 From bpopov@netcom.com Sun Dec 22 19:43:04 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!bpopov From: bpopov@netcom.com (Brian Popov) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec22.194304.2529@netcom.com> Date: Sun, 22 Dec 1996 19:43:04 GMT References: <1996Dec20.211804.2873@netcom.com> <1996Dec21.203804.8501@earthlink.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Dec21.203804.8501@earthlink.net>, ajohansson@earthlink.net (Amy Johansson) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. > Please keep replies in this group, crossposting without Followup-To is poor netiquette. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- === Brian Popov === Dept of Electrical Engineering, NETCOM On-Line Communication Services "When every node is whole, the channel opens." From llee@stanford.edu Mon Dec 23 05:22:04 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!llee From: llee@stanford.edu (Liam Lee) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec23.052204.4120@stanford.edu> Date: Mon, 23 Dec 1996 05:22:04 GMT References: <1996Dec20.211804.2873@netcom.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Dec20.211804.2873@netcom.com>, kkarlsson@netcom.com (Katrin Karlsson) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Liam Lee Zyxel U-1496E @ 28,800 bps "A soul is not exclusive to biology." From brobertson@delphi.com Wed Dec 25 06:37:04 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!brobertson From: brobertson@delphi.com (Bill Robertson) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Dec25.063704.2440@delphi.com> Date: Wed, 25 Dec 1996 06:37:04 GMT References: <1996Dec20.211804.2873@netcom.com> <1996Dec21.203804.8501@earthlink.net> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Dec21.203804.8501@earthlink.net>, ajohansson@earthlink.net (Amy Johansson) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. > Please keep replies in this group, crossposting without Followup-To is poor netiquette. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Bill Robertson Tape trading list upon request. SASE required for international mail.