From arobertson@cern.ch Sun May 14 13:48:25 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cern!arobertson From: arobertson@cern.ch (Amy Robertson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May14.134825.1057@cern.ch> Date: Sun, 14 May 1995 13:48:25 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Amy Robertson Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------ From mlee@berkeley.edu Tue May 16 05:47:25 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!berkeley!mlee From: mlee@berkeley.edu (Min-jun Lee) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May16.054725.9946@berkeley.edu> Date: Tue, 16 May 1995 05:47:25 GMT References: <1995May14.134825.1057@cern.ch> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995May14.134825.1057@cern.ch>, arobertson@cern.ch (Amy Robertson) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > 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? -- Min-jun Lee Hayes Optima 288 @ 9600 Telebit bps "A soul is not exclusive to biology." From bfournier@stanford.edu Wed May 17 19:15:25 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!bfournier From: bfournier@stanford.edu (Bastien Fournier) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May17.191525.6329@stanford.edu> Date: Wed, 17 May 1995 19:15:25 GMT References: <1995May14.134825.1057@cern.ch> <1995May16.054725.9946@berkeley.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995May16.054725.9946@berkeley.edu>, mlee@berkeley.edu (Min-jun Lee) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Bastien Fournier US Robotics Courier V.34 @ 14,400 bps "Do not worship the copy." From nrobertson@pacbell.net Thu May 18 04:29:25 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!nrobertson From: nrobertson@pacbell.net (Nadia Robertson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May18.042925.9128@pacbell.net> Date: Thu, 18 May 1995 04:29:25 GMT References: <1995May14.134825.1057@cern.ch> <1995May16.054725.9946@berkeley.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May16.054725.9946@berkeley.edu>, mlee@berkeley.edu (Min-jun Lee) 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! -- Nadia Robertson Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From tfischer@delphi.com Sat May 20 03:05:25 1995 Path: ashpoly!cascade!mxgate!coyoacan!delphi!tfischer From: tfischer@delphi.com (Tyler Fischer) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May20.030525.6283@delphi.com> Date: Sat, 20 May 1995 03:05:25 GMT References: <1995May14.134825.1057@cern.ch> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995May14.134825.1057@cern.ch>, arobertson@cern.ch (Amy Robertson) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Tyler Fischer Tape trading list upon request. SASE required for international mail.