From mnilsson@mit.edu Wed Oct 19 19:09:21 1994 Path: ashpoly!cascade!mxgate!coyoacan!mit!mnilsson From: mnilsson@mit.edu (Matthias Nilsson) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct19.190921.2416@mit.edu> Date: Wed, 19 Oct 1994 19:09:21 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 10 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! Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Matthias Nilsson -- Massachusetts Institute of Technology "Measuring a record you own is listening, not piracy." From agirard@demon.co.uk Fri Oct 21 04:26:21 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!agirard From: agirard@demon.co.uk (Aiko Girard) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct21.042621.6143@demon.co.uk> Date: Fri, 21 Oct 1994 04:26:21 GMT References: <1994Oct19.190921.2416@mit.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Oct19.190921.2416@mit.edu>, mnilsson@mit.edu (Matthias Nilsson) 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Aiko Girard *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0