From mrobertson@clari.net Tue Nov 21 19:18:13 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!clari!mrobertson From: mrobertson@clari.net (Mathieu Robertson) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov21.191813.7194@clari.net> Date: Tue, 21 Nov 1995 19:18:13 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. 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? -- Mathieu Robertson *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From bito@utexas.edu Thu Nov 23 11:24:13 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!bito From: bito@utexas.edu (Bastien Ito) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov23.112413.7019@utexas.edu> Date: Thu, 23 Nov 1995 11:24:13 GMT References: <1995Nov21.191813.7194@clari.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov21.191813.7194@clari.net>, mrobertson@clari.net (Mathieu Robertson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Bastien Ito "We don't sign stars. We build them." PC-9821Ap2 (NEC) / FreeBSD 2.1 From jgonzalez@cmu.edu Fri Nov 24 07:04:13 1995 Path: ashpoly!cascade!bigsur!cmu!jgonzalez From: jgonzalez@cmu.edu (Julien González) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov24.070413.1947@cmu.edu> Date: Fri, 24 Nov 1995 07:04:13 GMT References: <1995Nov21.191813.7194@clari.net> <1995Nov23.112413.7019@utexas.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov23.112413.7019@utexas.edu>, bito@utexas.edu (Bastien Ito) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Julien González Tape trading list upon request. SASE required for international mail. From atakahashi@cam.ac.uk Sat Nov 25 08:05:13 1995 Path: ashpoly!cascade!mxgate!coyoacan!cam!atakahashi From: atakahashi@cam.ac.uk (Anja Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov25.080513.9565@cam.ac.uk> Date: Sat, 25 Nov 1995 08:05:13 GMT References: <1995Nov21.191813.7194@clari.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Nov21.191813.7194@clari.net>, mrobertson@clari.net (Mathieu Robertson) 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. PGP Public key available via finger or upon request. -- Anja Takahashi *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From lito@u-tokyo.ac.jp Sun Nov 26 12:04:13 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!lito From: lito@u-tokyo.ac.jp (Lars Ito) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Nov26.120413.6424@u-tokyo.ac.jp> Date: Sun, 26 Nov 1995 12:04:13 GMT References: <1995Nov21.191813.7194@clari.net> <1995Nov23.112413.7019@utexas.edu> <1995Nov24.070413.1947@cmu.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov24.070413.1947@cmu.edu>, jgonzalez@cmu.edu (Julien González) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Lars Ito Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science. ------------------------------------------------------------