From echoi@earthlink.net Wed Sep 06 20:55:11 1995 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!echoi From: echoi@earthlink.net (Elaine Choi) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep06.205511.6996@earthlink.net> Date: Wed, 06 Sep 1995 20:55:11 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Elaine Choi Tape trading list upon request. SASE required for international mail. From ppetrov@cmu.edu Sat Sep 09 00:25:11 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!ppetrov From: ppetrov@cmu.edu (Pavel Petrov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep09.002511.8212@cmu.edu> Date: Sat, 09 Sep 1995 00:25:11 GMT References: <1995Sep06.205511.6996@earthlink.net> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Sep06.205511.6996@earthlink.net>, echoi@earthlink.net (Elaine Choi) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Pavel Petrov "5 sigma is a discovery. 7 is a question." Pentium 90 (OS/2 Warp) / Linux 1.2.13