From mmuller@cam.ac.uk Wed May 03 21:53:08 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!mmuller From: mmuller@cam.ac.uk (Min-jun Müller) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May03.215308.3747@cam.ac.uk> Date: Wed, 03 May 1995 21:53:08 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Min-jun Müller Zyxel U-1496E @ 9600 Telebit bps "Extraordinary claims require extraordinary spectra." From mito@stanford.edu Thu May 04 19:45:08 1995 Path: ashpoly!cascade!brgate!saturno!stanford!mito From: mito@stanford.edu (Mateo Ito) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May04.194508.3926@stanford.edu> Date: Thu, 04 May 1995 19:45:08 GMT References: <1995May03.215308.3747@cam.ac.uk> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995May03.215308.3747@cam.ac.uk>, mmuller@cam.ac.uk (Min-jun Müller) writes: > 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. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. If you are posting from AOL, please read RFC 1036 before posting again. -- Mateo Ito -- Stanford University Computer Systems Lab "5 sigma is a discovery. 7 is a question." From fcampbell@titech.ac.jp Sat May 06 13:56:08 1995 Path: ashpoly!cascade!brgate!saturno!titech!fcampbell From: fcampbell@titech.ac.jp (Freya Campbell) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May06.135608.8429@titech.ac.jp> Date: Sat, 06 May 1995 13:56:08 GMT References: <1995May03.215308.3747@cam.ac.uk> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May03.215308.3747@cam.ac.uk>, mmuller@cam.ac.uk (Min-jun Müller) writes: > 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Freya Campbell -- Tokyo Institute of Technology Computer Centre "In theory there is no difference between theory and practice." From lmoreau@clari.net Sun May 07 14:20:08 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!lmoreau From: lmoreau@clari.net (Lucia Moreau) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May07.142008.8498@clari.net> Date: Sun, 07 May 1995 14:20:08 GMT References: <1995May03.215308.3747@cam.ac.uk> <1995May06.135608.8429@titech.ac.jp> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995May06.135608.8429@titech.ac.jp>, fcampbell@titech.ac.jp (Freya Campbell) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Lucia Moreau -- ClariNet Communications Corp "They will send a copy in my place." From pmoreno@rwth-aachen.de Sun May 07 15:32:08 1995 Path: ashpoly!cascade!brgate!saturno!rwth-aachen!pmoreno From: pmoreno@rwth-aachen.de (Pavel Moreno) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May07.153208.1460@rwth-aachen.de> Date: Sun, 07 May 1995 15:32:08 GMT References: <1995May03.215308.3747@cam.ac.uk> <1995May04.194508.3926@stanford.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995May04.194508.3926@stanford.edu>, mito@stanford.edu (Mateo Ito) writes: > Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. > If you are posting from AOL, please read RFC 1036 before posting again. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Pavel Moreno "A soul is not exclusive to biology." Macintosh IIfx / Linux 1.2.13