From tpark@panix.com Sat Mar 11 05:38:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!tpark From: tpark@panix.com (Thiago Park) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar11.053823.2286@panix.com> Date: Sat, 11 Mar 1995 05:38:23 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. 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? -- Thiago Park *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From mpopov@tum.de Sat Mar 11 21:54:23 1995 Path: ashpoly!cascade!transat!ukc!fennimore!tum!mpopov From: mpopov@tum.de (Morag Popov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar11.215423.9417@tum.de> Date: Sat, 11 Mar 1995 21:54:23 GMT References: <1995Mar11.053823.2286@panix.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Mar11.053823.2286@panix.com>, tpark@panix.com (Thiago Park) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- === Morag Popov === Dept of Electrical Engineering, Technische Universität München "We don't sign stars. We build them."