From asantos@kiae.su Sun Apr 23 23:14:52 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!asantos From: asantos@kiae.su (Anton Santos) Newsgroups: comp.sys.m68k Subject: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr23.231452.7743@kiae.su> Date: Sun, 23 Apr 1995 23:14:52 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 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! The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Anton Santos Tape trading list upon request. SASE required for international mail. From mkang@delphi.com Tue Apr 25 10:30:52 1995 Path: ashpoly!cascade!mxgate!coyoacan!delphi!mkang From: mkang@delphi.com (Mei Kang) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr25.103052.1588@delphi.com> Date: Tue, 25 Apr 1995 10:30:52 GMT References: <1995Apr23.231452.7743@kiae.su> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Apr23.231452.7743@kiae.su>, asantos@kiae.su (Anton Santos) 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! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Mei Kang *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0