From hgirard@uu.net Tue Jun 25 04:42:18 1996 Path: ashpoly!cascade!bigsur!uu!hgirard From: hgirard@uu.net (Hugo Girard) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun25.044218.6124@uu.net> Date: Tue, 25 Jun 1996 04:42:18 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. 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 Girard | hgirard@uu.net PGP Key fingerprint: BF7C BC8E FAC1 6D04 "Keep the channels open." From beriksson@u-tokyo.ac.jp Wed Jun 26 17:24:18 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!beriksson From: beriksson@u-tokyo.ac.jp (Bill Eriksson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun26.172418.3198@u-tokyo.ac.jp> Date: Wed, 26 Jun 1996 17:24:18 GMT References: <1996Jun25.044218.6124@uu.net> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Jun25.044218.6124@uu.net>, hgirard@uu.net (Hugo Girard) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > 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. 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! -- Bill Eriksson -- University of Tokyo Department of Information Science "They will send a copy in my place." From egirard@demon.co.uk Thu Jun 27 03:03:18 1996 Path: ashpoly!cascade!brgate!saturno!demon!egirard From: egirard@demon.co.uk (Elaine Girard) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun27.030318.1196@demon.co.uk> Date: Thu, 27 Jun 1996 03:03:18 GMT References: <1996Jun25.044218.6124@uu.net> <1996Jun26.172418.3198@u-tokyo.ac.jp> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Jun26.172418.3198@u-tokyo.ac.jp>, beriksson@u-tokyo.ac.jp (Bill Eriksson) writes: > 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! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Elaine Girard US Robotics Courier V.34 @ ISDN 64k bps "There are 14 nodes and only 10 countries. Count again." From dchoi@uu.net Thu Jun 27 13:14:18 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!dchoi From: dchoi@uu.net (Dave Choi) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun27.131418.9561@uu.net> Date: Thu, 27 Jun 1996 13:14:18 GMT References: <1996Jun25.044218.6124@uu.net> <1996Jun26.172418.3198@u-tokyo.ac.jp> <1996Jun27.030318.1196@demon.co.uk> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Jun27.030318.1196@demon.co.uk>, egirard@demon.co.uk (Elaine Girard) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Dave Choi -- UUNET Technologies, Falls Church VA "There are 14 nodes and only 10 countries. Count again." From glaurent@panix.com Fri Jun 28 00:45:18 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!glaurent From: glaurent@panix.com (Göran Laurent) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun28.004518.3666@panix.com> Date: Fri, 28 Jun 1996 00:45:18 GMT References: <1996Jun25.044218.6124@uu.net> <1996Jun26.172418.3198@u-tokyo.ac.jp> <1996Jun27.030318.1196@demon.co.uk> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jun27.030318.1196@demon.co.uk>, egirard@demon.co.uk (Elaine Girard) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Göran Laurent *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0