From hpetrov@kth.se Thu Aug 25 10:51:59 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!hpetrov From: hpetrov@kth.se (Hugo Petrov) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug25.105159.2558@kth.se> Date: Thu, 25 Aug 1994 10:51:59 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N 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. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Hugo Petrov -- Royal Institute of Technology, Stockholm "In theory there is no difference between theory and practice." From moliveira@kiae.su Fri Aug 26 05:13:59 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!kiae!moliveira From: moliveira@kiae.su (Marta Oliveira) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug26.051359.3093@kiae.su> Date: Fri, 26 Aug 1994 05:13:59 GMT References: <1994Aug25.105159.2558@kth.se> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Aug25.105159.2558@kth.se>, hpetrov@kth.se (Hugo Petrov) writes: > 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. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Marta Oliveira Tape trading list upon request. SASE required for international mail. From vlopez@pipeline.com Sat Aug 27 00:32:59 1994 Path: ashpoly!cascade!brgate!saturno!pipeline!vlopez From: vlopez@pipeline.com (Valeria López) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug27.003259.4016@pipeline.com> Date: Sat, 27 Aug 1994 00:32:59 GMT References: <1994Aug25.105159.2558@kth.se> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Aug25.105159.2558@kth.se>, hpetrov@kth.se (Hugo Petrov) writes: > 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Valeria López Tape trading list upon request. SASE required for international mail. From gnakamura@clari.net Sun Aug 28 19:22:59 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!gnakamura From: gnakamura@clari.net (Göran Nakamura) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug28.192259.7993@clari.net> Date: Sun, 28 Aug 1994 19:22:59 GMT References: <1994Aug25.105159.2558@kth.se> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Aug25.105159.2558@kth.se>, hpetrov@kth.se (Hugo 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? -- Göran Nakamura -- ClariNet Communications Corp "Tape doesn't lie at 02:14. Ears do." From aramirez@clari.net Tue Aug 30 16:40:59 1994 Path: ashpoly!cascade!brgate!saturno!clari!aramirez From: aramirez@clari.net (Amy Ramírez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug30.164059.2948@clari.net> Date: Tue, 30 Aug 1994 16:40:59 GMT References: <1994Aug25.105159.2558@kth.se> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug25.105159.2558@kth.se>, hpetrov@kth.se (Hugo Petrov) 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. -- Amy Ramírez SupraFAXModem 28.8 @ 9600 Telebit bps "In theory there is no difference between theory and practice."