From mnilsson@delphi.com Fri Jun 02 16:21:09 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!delphi!mnilsson From: mnilsson@delphi.com (Mateo Nilsson) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun02.162109.8988@delphi.com> Date: Fri, 02 Jun 1995 16:21:09 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. 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! -- Mateo Nilsson "Marcus is not one man." Commodore Amiga 500 (1MB OCS) / AmigaOS 3.1 From jgonzalez@pipeline.com Sat Jun 03 23:35:09 1995 Path: ashpoly!cascade!bigsur!pipeline!jgonzalez From: jgonzalez@pipeline.com (Julien González) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun03.233509.8030@pipeline.com> Date: Sat, 03 Jun 1995 23:35:09 GMT References: <1995Jun02.162109.8988@delphi.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jun02.162109.8988@delphi.com>, mnilsson@delphi.com (Mateo Nilsson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Julien González Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From nkuznetsov@pacbell.net Mon Jun 05 17:56:09 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!nkuznetsov From: nkuznetsov@pacbell.net (Nadia Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun05.175609.1399@pacbell.net> Date: Mon, 05 Jun 1995 17:56:09 GMT References: <1995Jun02.162109.8988@delphi.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jun02.162109.8988@delphi.com>, mnilsson@delphi.com (Mateo Nilsson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Nadia Kuznetsov Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From hsanchez@kiae.su Mon Jun 05 22:40:09 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!kiae!hsanchez From: hsanchez@kiae.su (Heather Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun05.224009.7030@kiae.su> Date: Mon, 05 Jun 1995 22:40:09 GMT References: <1995Jun02.162109.8988@delphi.com> <1995Jun03.233509.8030@pipeline.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jun03.233509.8030@pipeline.com>, jgonzalez@pipeline.com (Julien González) 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. -- Heather Sánchez Tape trading list upon request. SASE required for international mail.