From hkim@uni-hamburg.de Thu Dec 14 19:14:51 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!hkim From: hkim@uni-hamburg.de (Hana Kim) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec14.191451.2180@uni-hamburg.de> Date: Thu, 14 Dec 1995 19:14:51 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 11 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Hana Kim "We don't sign stars. We build them." Macintosh IIfx / Linux 1.2.13 From aivanov@kth.se Fri Dec 15 14:47:51 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!aivanov From: aivanov@kth.se (Astrid Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec15.144751.7514@kth.se> Date: Fri, 15 Dec 1995 14:47:51 GMT References: <1995Dec14.191451.2180@uni-hamburg.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Dec14.191451.2180@uni-hamburg.de>, hkim@uni-hamburg.de (Hana Kim) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Astrid Ivanov | aivanov@kth.se PGP Key fingerprint: FDB5 02D7 9D25 9B30 "Keep the channels open." From fsuzuki@pacbell.net Sat Dec 16 06:50:51 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!fsuzuki From: fsuzuki@pacbell.net (Freya Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec16.065051.1873@pacbell.net> Date: Sat, 16 Dec 1995 06:50:51 GMT References: <1995Dec14.191451.2180@uni-hamburg.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Dec14.191451.2180@uni-hamburg.de>, hkim@uni-hamburg.de (Hana Kim) writes: > 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. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Freya Suzuki -- Pacific Bell Internet Services "Do not worship the copy."