From breyes@tum.de Wed Sep 06 15:27:39 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!breyes From: breyes@tum.de (Bruno Reyes) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep06.152739.4585@tum.de> Date: Wed, 06 Sep 1995 15:27:39 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 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! 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Bruno Reyes Zyxel U-1496E @ 33,600 bps "Extraordinary claims require extraordinary spectra." From jmacdonald@mindspring.com Thu Sep 07 16:43:39 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!jmacdonald From: jmacdonald@mindspring.com (Joachim MacDonald) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep07.164339.6158@mindspring.com> Date: Thu, 07 Sep 1995 16:43:39 GMT References: <1995Sep06.152739.4585@tum.de> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep06.152739.4585@tum.de>, breyes@tum.de (Bruno Reyes) 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. -- Joachim MacDonald *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From civanov@berkeley.edu Fri Sep 08 11:38:39 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!berkeley!civanov From: civanov@berkeley.edu (Camila Ivanov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep08.113839.5604@berkeley.edu> Date: Fri, 08 Sep 1995 11:38:39 GMT References: <1995Sep06.152739.4585@tum.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Sep06.152739.4585@tum.de>, breyes@tum.de (Bruno Reyes) 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! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Camila Ivanov Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------ From joliveira@utexas.edu Sun Sep 10 05:06:39 1995 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!joliveira From: joliveira@utexas.edu (Joachim Oliveira) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep10.050639.3056@utexas.edu> Date: Sun, 10 Sep 1995 05:06:39 GMT References: <1995Sep06.152739.4585@tum.de> <1995Sep08.113839.5604@berkeley.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Sep08.113839.5604@berkeley.edu>, civanov@berkeley.edu (Camila Ivanov) 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. -- Joachim Oliveira Tape trading list upon request. SASE required for international mail.