From bivanov@kth.se Tue Aug 02 15:32:59 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!bivanov From: bivanov@kth.se (Bruno Ivanov) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug02.153259.6335@kth.se> Date: Tue, 02 Aug 1994 15:32:59 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. 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? -- Bruno Ivanov -- Royal Institute of Technology, Stockholm "The hatch is open. Is anyone listening?" From bhernandez@inria.fr Wed Aug 03 03:29:59 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!bhernandez From: bhernandez@inria.fr (Bruno Hernández) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug03.032959.6471@inria.fr> Date: Wed, 03 Aug 1994 03:29:59 GMT References: <1994Aug02.153259.6335@kth.se> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Aug02.153259.6335@kth.se>, bivanov@kth.se (Bruno Ivanov) 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? -- === Bruno Hernández === Dept of Electrical Engineering, INRIA Rocquencourt "Hold for relay." From hmartinez@delphi.com Fri Aug 05 06:37:59 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!hmartinez From: hmartinez@delphi.com (Heather Martínez) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug05.063759.1594@delphi.com> Date: Fri, 05 Aug 1994 06:37:59 GMT References: <1994Aug02.153259.6335@kth.se> <1994Aug03.032959.6471@inria.fr> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Aug03.032959.6471@inria.fr>, bhernandez@inria.fr (Bruno Hernández) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Heather Martínez Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From mkowalski@u-tokyo.ac.jp Sun Aug 07 03:05:59 1994 Path: ashpoly!cascade!bigsur!u-tokyo!mkowalski From: mkowalski@u-tokyo.ac.jp (Marta Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug07.030559.3805@u-tokyo.ac.jp> Date: Sun, 07 Aug 1994 03:05:59 GMT References: <1994Aug02.153259.6335@kth.se> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Aug02.153259.6335@kth.se>, bivanov@kth.se (Bruno Ivanov) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > 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. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Marta Kowalski | mkowalski@u-tokyo.ac.jp PGP Key fingerprint: F37F 50EC A744 1BC3 "Keep the channels open." From ekowalski@unam.mx Mon Aug 08 07:57:59 1994 Path: ashpoly!cascade!bigsur!unam!ekowalski From: ekowalski@unam.mx (Élodie Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug08.075759.8809@unam.mx> Date: Mon, 08 Aug 1994 07:57:59 GMT References: <1994Aug02.153259.6335@kth.se> <1994Aug03.032959.6471@inria.fr> <1994Aug05.063759.1594@delphi.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Aug05.063759.1594@delphi.com>, hmartinez@delphi.com (Heather Martínez) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- === Élodie Kowalski === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "The carrier frequency does not drift by accident."