From nduarte@demon.co.uk Wed Sep 27 20:05:44 1995 Path: ashpoly!cascade!bigsur!demon!nduarte From: nduarte@demon.co.uk (Nadine Duarte) Newsgroups: comp.sys.m68k Subject: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep27.200544.8480@demon.co.uk> Date: Wed, 27 Sep 1995 20:05:44 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 10 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. By setting up Paula's audio DMA to double-buffer incoming 8-bit samples, the 68020 has plenty of cycles left for the Costas loop. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Nadine Duarte Tape trading list upon request. SASE required for international mail. From mfischer@titech.ac.jp Fri Sep 29 20:50:44 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!mfischer From: mfischer@titech.ac.jp (Mikhail Fischer) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep29.205044.7334@titech.ac.jp> Date: Fri, 29 Sep 1995 20:50:44 GMT References: <1995Sep27.200544.8480@demon.co.uk> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Sep27.200544.8480@demon.co.uk>, nduarte@demon.co.uk (Nadine Duarte) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Mikhail Fischer Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------ From mduarte@inria.fr Sat Sep 30 04:01:44 1995 Path: ashpoly!cascade!bigsur!inria!mduarte From: mduarte@inria.fr (Marisol Duarte) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep30.040144.4845@inria.fr> Date: Sat, 30 Sep 1995 04:01:44 GMT References: <1995Sep27.200544.8480@demon.co.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Sep27.200544.8480@demon.co.uk>, nduarte@demon.co.uk (Nadine Duarte) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? PGP Public key available via finger or upon request. -- Marisol Duarte Tape trading list upon request. SASE required for international mail. From bokonkwo@utexas.edu Mon Oct 02 02:39:44 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!bokonkwo From: bokonkwo@utexas.edu (Bastien Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Oct02.023944.6158@utexas.edu> Date: Mon, 02 Oct 1995 02:39:44 GMT References: <1995Sep27.200544.8480@demon.co.uk> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Sep27.200544.8480@demon.co.uk>, nduarte@demon.co.uk (Nadine Duarte) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Bastien Okonkwo Tape trading list upon request. SASE required for international mail. From aramirez@cern.ch Tue Oct 03 00:40:44 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!aramirez From: aramirez@cern.ch (Andrei Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Oct03.004044.5681@cern.ch> Date: Tue, 03 Oct 1995 00:40:44 GMT References: <1995Sep27.200544.8480@demon.co.uk> <1995Sep30.040144.4845@inria.fr> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Sep30.040144.4845@inria.fr>, mduarte@inria.fr (Marisol Duarte) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Andrei Ramírez *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0