From yandersson@pacbell.net Wed Mar 16 06:13:46 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!pacbell!yandersson From: yandersson@pacbell.net (Yuki Andersson) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar16.061346.7210@pacbell.net> Date: Wed, 16 Mar 1994 06:13:46 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- === Yuki Andersson === Dept of Electrical Engineering, Pacific Bell Internet Services "Measuring a record you own is listening, not piracy." From rtanaka@delphi.com Thu Mar 17 11:48:46 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!rtanaka From: rtanaka@delphi.com (Rodrigo Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar17.114846.4161@delphi.com> Date: Thu, 17 Mar 1994 11:48:46 GMT References: <1994Mar16.061346.7210@pacbell.net> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Mar16.061346.7210@pacbell.net>, yandersson@pacbell.net (Yuki Andersson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > 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! PGP Public key available via finger or upon request. -- Rodrigo Tanaka Tape trading list upon request. SASE required for international mail. From olopez@clari.net Fri Mar 18 11:10:46 1994 Path: ashpoly!cascade!bigsur!clari!olopez From: olopez@clari.net (Olga López) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar18.111046.8233@clari.net> Date: Fri, 18 Mar 1994 11:10:46 GMT References: <1994Mar16.061346.7210@pacbell.net> <1994Mar17.114846.4161@delphi.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Mar17.114846.4161@delphi.com>, rtanaka@delphi.com (Rodrigo Tanaka) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! > PGP Public key available via finger or upon request. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Olga López Tape trading list upon request. SASE required for international mail. From nweber@cam.ac.uk Sun Mar 20 06:49:46 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!nweber From: nweber@cam.ac.uk (Natalia Weber) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar20.064946.8684@cam.ac.uk> Date: Sun, 20 Mar 1994 06:49:46 GMT References: <1994Mar16.061346.7210@pacbell.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Mar16.061346.7210@pacbell.net>, yandersson@pacbell.net (Yuki Andersson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Natalia Weber | nweber@cam.ac.uk PGP Key fingerprint: 1427 7729 DEF8 9CAB "Keep the channels open." From lmuller@cam.ac.uk Tue Mar 22 03:49:46 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!lmuller From: lmuller@cam.ac.uk (Lars Müller) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar22.034946.6722@cam.ac.uk> Date: Tue, 22 Mar 1994 03:49:46 GMT References: <1994Mar16.061346.7210@pacbell.net> <1994Mar17.114846.4161@delphi.com> <1994Mar18.111046.8233@clari.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Mar18.111046.8233@clari.net>, olopez@clari.net (Olga López) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Lars Müller Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------