From srodriguez@cam.ac.uk Wed Nov 15 10:42:16 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cam!srodriguez From: srodriguez@cam.ac.uk (Sven Rodríguez) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov15.104216.7840@cam.ac.uk> Date: Wed, 15 Nov 1995 10:42:16 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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! Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Sven Rodríguez *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From bsantos@pipeline.com Thu Nov 16 04:43:16 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pipeline!bsantos From: bsantos@pipeline.com (Bruno Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov16.044316.9450@pipeline.com> Date: Thu, 16 Nov 1995 04:43:16 GMT References: <1995Nov15.104216.7840@cam.ac.uk> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov15.104216.7840@cam.ac.uk>, srodriguez@cam.ac.uk (Sven Rodríguez) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Bruno Santos Tape trading list upon request. SASE required for international mail. From hsilva@demon.co.uk Fri Nov 17 12:07:16 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!hsilva From: hsilva@demon.co.uk (Heather Silva) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov17.120716.1304@demon.co.uk> Date: Fri, 17 Nov 1995 12:07:16 GMT References: <1995Nov15.104216.7840@cam.ac.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov15.104216.7840@cam.ac.uk>, srodriguez@cam.ac.uk (Sven Rodríguez) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Heather Silva | hsilva@demon.co.uk PGP Key fingerprint: 8CE3 C7C2 B3F3 3204 "Keep the channels open."