From mduarte@uni-hamburg.de Tue Mar 22 11:40:25 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!mduarte From: mduarte@uni-hamburg.de (Mikhail Duarte) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar22.114025.6493@uni-hamburg.de> Date: Tue, 22 Mar 1994 11:40:25 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] 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? -- Mikhail Duarte Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------ From msuzuki@uni-hamburg.de Thu Mar 24 14:27:25 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!msuzuki From: msuzuki@uni-hamburg.de (Mikhail Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar24.142725.6036@uni-hamburg.de> Date: Thu, 24 Mar 1994 14:27:25 GMT References: <1994Mar22.114025.6493@uni-hamburg.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Mar22.114025.6493@uni-hamburg.de>, mduarte@uni-hamburg.de (Mikhail Duarte) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Mikhail Suzuki *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From csantos@mit.edu Sat Mar 26 04:38:25 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!csantos From: csantos@mit.edu (Camila Santos) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar26.043825.4098@mit.edu> Date: Sat, 26 Mar 1994 04:38:25 GMT References: <1994Mar22.114025.6493@uni-hamburg.de> <1994Mar24.142725.6036@uni-hamburg.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Mar24.142725.6036@uni-hamburg.de>, msuzuki@uni-hamburg.de (Mikhail Suzuki) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Camila Santos *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From hsanchez@clari.net Sun Mar 27 09:06:25 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!clari!hsanchez From: hsanchez@clari.net (Hugo Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar27.090625.7216@clari.net> Date: Sun, 27 Mar 1994 09:06:25 GMT References: <1994Mar22.114025.6493@uni-hamburg.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Mar22.114025.6493@uni-hamburg.de>, mduarte@uni-hamburg.de (Mikhail Duarte) 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. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Hugo Sánchez Hayes Optima 288 @ 19,200 bps "Marcus is not one man." From ddubois@tum.de Mon Mar 28 13:29:25 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!ddubois From: ddubois@tum.de (Dave Dubois) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Mar28.132925.2195@tum.de> Date: Mon, 28 Mar 1994 13:29:25 GMT References: <1994Mar22.114025.6493@uni-hamburg.de> <1994Mar24.142725.6036@uni-hamburg.de> <1994Mar26.043825.4098@mit.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Mar26.043825.4098@mit.edu>, csantos@mit.edu (Camila Santos) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- === Dave Dubois === Dept of Electrical Engineering, Technische Universität München "In theory there is no difference between theory and practice."