From meriksson@pacbell.net Sat Aug 05 08:29:36 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!meriksson From: meriksson@pacbell.net (Mikhail Eriksson) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug05.082936.8677@pacbell.net> Date: Sat, 05 Aug 1995 08:29:36 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 10 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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! -- Mikhail Eriksson Tape trading list upon request. SASE required for international mail. From smoreno@illinois.edu Sun Aug 06 02:47:36 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!illinois!smoreno From: smoreno@illinois.edu (Steve Moreno) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug06.024736.1713@illinois.edu> Date: Sun, 06 Aug 1995 02:47:36 GMT References: <1995Aug05.082936.8677@pacbell.net> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Aug05.082936.8677@pacbell.net>, meriksson@pacbell.net (Mikhail Eriksson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Steve Moreno Tape trading list upon request. SASE required for international mail. From thernandez@utexas.edu Sun Aug 06 21:58:36 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!thernandez From: thernandez@utexas.edu (Thiago Hernández) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug06.215836.6292@utexas.edu> Date: Sun, 06 Aug 1995 21:58:36 GMT References: <1995Aug05.082936.8677@pacbell.net> <1995Aug06.024736.1713@illinois.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug06.024736.1713@illinois.edu>, smoreno@illinois.edu (Steve Moreno) 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! -- Thiago Hernández "When every node is whole, the channel opens." Amiga 1200 (Blizzard 030/50) / SunOS 4.1.4 From ksokolov@mit.edu Tue Aug 08 12:25:36 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!ksokolov From: ksokolov@mit.edu (Kirsty Sokolov) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Aug08.122536.1477@mit.edu> Date: Tue, 08 Aug 1995 12:25:36 GMT References: <1995Aug05.082936.8677@pacbell.net> <1995Aug06.024736.1713@illinois.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug06.024736.1713@illinois.edu>, smoreno@illinois.edu (Steve Moreno) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Kirsty Sokolov Opinions expressed are solely my own and not those of Massachusetts Institute of Technology. ------------------------------------------------------------