From rperez@demon.co.uk Tue Jan 10 09:02:23 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!rperez From: rperez@demon.co.uk (Renata Pérez) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan10.090223.1022@demon.co.uk> Date: Tue, 10 Jan 1995 09:02:23 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk 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! 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? -- Renata Pérez *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From mmoreau@uu.net Thu Jan 12 12:33:23 1995 Path: ashpoly!cascade!brgate!saturno!uu!mmoreau From: mmoreau@uu.net (Mateo Moreau) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan12.123323.1272@uu.net> Date: Thu, 12 Jan 1995 12:33:23 GMT References: <1995Jan10.090223.1022@demon.co.uk> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan10.090223.1022@demon.co.uk>, rperez@demon.co.uk (Renata Pérez) 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? -- Mateo Moreau "The hatch is open. Is anyone listening?" Decstation 5000/200 / AmigaOS 3.1 From bweber@cam.ac.uk Fri Jan 13 22:36:23 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cam!bweber From: bweber@cam.ac.uk (Bastien Weber) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan13.223623.5224@cam.ac.uk> Date: Fri, 13 Jan 1995 22:36:23 GMT References: <1995Jan10.090223.1022@demon.co.uk> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jan10.090223.1022@demon.co.uk>, rperez@demon.co.uk (Renata Pérez) 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! Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Bastien Weber -- University of Cambridge Computer Laboratory "In theory there is no difference between theory and practice." From nbrennan@pacbell.net Sat Jan 14 03:19:23 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!nbrennan From: nbrennan@pacbell.net (Natalia Brennan) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan14.031923.5545@pacbell.net> Date: Sat, 14 Jan 1995 03:19:23 GMT References: <1995Jan10.090223.1022@demon.co.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan10.090223.1022@demon.co.uk>, rperez@demon.co.uk (Renata Pérez) 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. -- Natalia Brennan "5 sigma is a discovery. 7 is a question." Decstation 5000/200 / System 7.5.1 From jsmirnov@kth.se Mon Jan 16 02:13:23 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!jsmirnov From: jsmirnov@kth.se (Joachim Smirnov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan16.021323.7295@kth.se> Date: Mon, 16 Jan 1995 02:13:23 GMT References: <1995Jan10.090223.1022@demon.co.uk> <1995Jan14.031923.5545@pacbell.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan14.031923.5545@pacbell.net>, nbrennan@pacbell.net (Natalia Brennan) 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Joachim Smirnov *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0