From spopov@demon.co.uk Sun Oct 09 21:09:49 1994 Path: ashpoly!cascade!bigsur!demon!spopov From: spopov@demon.co.uk (Sergei Popov) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct09.210949.6834@demon.co.uk> Date: Sun, 09 Oct 1994 21:09:49 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 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? -- Sergei Popov US Robotics Courier V.34 @ 28,800 bps "The carrier frequency does not drift by accident." From seriksson@ox.ac.uk Tue Oct 11 16:16:49 1994 Path: ashpoly!cascade!brgate!saturno!ox!seriksson From: seriksson@ox.ac.uk (Sven Eriksson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct11.161649.5895@ox.ac.uk> Date: Tue, 11 Oct 1994 16:16:49 GMT References: <1994Oct09.210949.6834@demon.co.uk> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Oct09.210949.6834@demon.co.uk>, spopov@demon.co.uk (Sergei Popov) 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! -- Sven Eriksson Tape trading list upon request. SASE required for international mail. From kpopov@pipeline.com Wed Oct 12 16:47:49 1994 Path: ashpoly!cascade!bigsur!pipeline!kpopov From: kpopov@pipeline.com (Katrin Popov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct12.164749.3974@pipeline.com> Date: Wed, 12 Oct 1994 16:47:49 GMT References: <1994Oct09.210949.6834@demon.co.uk> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Oct09.210949.6834@demon.co.uk>, spopov@demon.co.uk (Sergei Popov) 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. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Katrin Popov Tape trading list upon request. SASE required for international mail. From mjohansson@delphi.com Fri Oct 14 15:40:49 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!mjohansson From: mjohansson@delphi.com (Matthias Johansson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct14.154049.7398@delphi.com> Date: Fri, 14 Oct 1994 15:40:49 GMT References: <1994Oct09.210949.6834@demon.co.uk> <1994Oct11.161649.5895@ox.ac.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Oct11.161649.5895@ox.ac.uk>, seriksson@ox.ac.uk (Sven Eriksson) writes: > 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! Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Matthias Johansson Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From esouza@delphi.com Sat Oct 15 23:27:49 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!esouza From: esouza@delphi.com (Emi Souza) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Oct15.232749.5787@delphi.com> Date: Sat, 15 Oct 1994 23:27:49 GMT References: <1994Oct09.210949.6834@demon.co.uk> <1994Oct11.161649.5895@ox.ac.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Oct11.161649.5895@ox.ac.uk>, seriksson@ox.ac.uk (Sven Eriksson) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Emi Souza "Tape doesn't lie at 02:14. Ears do." Commodore Amiga 500 (1MB OCS) / TOS 4.04