From bhughes@rwth-aachen.de Thu Feb 01 08:53:19 1996 Path: ashpoly!cascade!bigsur!rwth-aachen!bhughes From: bhughes@rwth-aachen.de (Bastien Hughes) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb01.085319.6914@rwth-aachen.de> Date: Thu, 01 Feb 1996 08:53:19 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Bastien Hughes | bhughes@rwth-aachen.de PGP Key fingerprint: 9F09 F804 C423 B458 "Keep the channels open." From lvasiliev@mindspring.com Thu Feb 01 10:02:19 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!lvasiliev From: lvasiliev@mindspring.com (Lars Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb01.100219.9487@mindspring.com> Date: Thu, 01 Feb 1996 10:02:19 GMT References: <1996Feb01.085319.6914@rwth-aachen.de> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Feb01.085319.6914@rwth-aachen.de>, bhughes@rwth-aachen.de (Bastien Hughes) 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. -- Lars Vasiliev Opinions expressed are solely my own and not those of MindSpring Enterprises. ------------------------------------------------------------ From hsanchez@purdue.edu Sat Feb 03 13:12:19 1996 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!hsanchez From: hsanchez@purdue.edu (Hana Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb03.131219.3945@purdue.edu> Date: Sat, 03 Feb 1996 13:12:19 GMT References: <1996Feb01.085319.6914@rwth-aachen.de> <1996Feb01.100219.9487@mindspring.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Feb01.100219.9487@mindspring.com>, lvasiliev@mindspring.com (Lars Vasiliev) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Hana Sánchez *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From msouza@cern.ch Mon Feb 05 08:55:19 1996 Path: ashpoly!cascade!bigsur!cern!msouza From: msouza@cern.ch (Mike Souza) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb05.085519.5746@cern.ch> Date: Mon, 05 Feb 1996 08:55:19 GMT References: <1996Feb01.085319.6914@rwth-aachen.de> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Feb01.085319.6914@rwth-aachen.de>, bhughes@rwth-aachen.de (Bastien Hughes) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- === Mike Souza === Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva "5 sigma is a discovery. 7 is a question." From holiveira@clari.net Mon Feb 05 17:24:19 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!holiveira From: holiveira@clari.net (Hugo Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Feb05.172419.9095@clari.net> Date: Mon, 05 Feb 1996 17:24:19 GMT References: <1996Feb01.085319.6914@rwth-aachen.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Feb01.085319.6914@rwth-aachen.de>, bhughes@rwth-aachen.de (Bastien Hughes) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. PGP Public key available via finger or upon request. -- Hugo Oliveira -- ClariNet Communications Corp "There are 14 nodes and only 10 countries. Count again."