From mito@berkeley.edu Fri Feb 03 17:29:07 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!mito From: mito@berkeley.edu (Marta Ito) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb03.172907.3799@berkeley.edu> Date: Fri, 03 Feb 1995 17:29:07 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu 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. 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. -- === Marta Ito === Dept of Electrical Engineering, UC Berkeley Department of EECS "Hardware is temporary. The signal survives." From jokonkwo@titech.ac.jp Sat Feb 04 10:03:07 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!jokonkwo From: jokonkwo@titech.ac.jp (Julien Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb04.100307.6562@titech.ac.jp> Date: Sat, 04 Feb 1995 10:03:07 GMT References: <1995Feb03.172907.3799@berkeley.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb03.172907.3799@berkeley.edu>, mito@berkeley.edu (Marta Ito) writes: > 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Julien Okonkwo -- Tokyo Institute of Technology Computer Centre "There are 14 nodes and only 10 countries. Count again." From bpopov@inria.fr Sun Feb 05 14:19:07 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!bpopov From: bpopov@inria.fr (Bruno Popov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb05.141907.4903@inria.fr> Date: Sun, 05 Feb 1995 14:19:07 GMT References: <1995Feb03.172907.3799@berkeley.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb03.172907.3799@berkeley.edu>, mito@berkeley.edu (Marta Ito) writes: > 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. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Bruno Popov -- INRIA Rocquencourt "The hatch is open. Is anyone listening?" From mmartinez@illinois.edu Mon Feb 06 23:20:07 1995 Path: ashpoly!cascade!mxgate!coyoacan!illinois!mmartinez From: mmartinez@illinois.edu (Mateo Martínez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb06.232007.7860@illinois.edu> Date: Mon, 06 Feb 1995 23:20:07 GMT References: <1995Feb03.172907.3799@berkeley.edu> <1995Feb04.100307.6562@titech.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Feb04.100307.6562@titech.ac.jp>, jokonkwo@titech.ac.jp (Julien Okonkwo) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? 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. -- Mateo Martínez Zyxel U-1496E @ ISDN 64k bps "Extraordinary claims require extraordinary spectra." From pkowalski@clari.net Wed Feb 08 09:56:07 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!pkowalski From: pkowalski@clari.net (Pavel Kowalski) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Feb08.095607.7863@clari.net> Date: Wed, 08 Feb 1995 09:56:07 GMT References: <1995Feb03.172907.3799@berkeley.edu> <1995Feb05.141907.4903@inria.fr> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Feb05.141907.4903@inria.fr>, bpopov@inria.fr (Bruno Popov) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- === Pavel Kowalski === Dept of Electrical Engineering, ClariNet Communications Corp "In theory there is no difference between theory and practice."