From jvasiliev@pacbell.net Thu Mar 23 22:52:26 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!pacbell!jvasiliev From: jvasiliev@pacbell.net (Jen Vasiliev) Newsgroups: comp.sys.m68k Subject: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar23.225226.1561@pacbell.net> Date: Thu, 23 Mar 1995 22:52:26 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 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. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Jen Vasiliev Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From meriksson@uu.net Fri Mar 24 10:47:26 1995 Path: ashpoly!cascade!bigsur!uu!meriksson From: meriksson@uu.net (Mikhail Eriksson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar24.104726.7224@uu.net> Date: Fri, 24 Mar 1995 10:47:26 GMT References: <1995Mar23.225226.1561@pacbell.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Mar23.225226.1561@pacbell.net>, jvasiliev@pacbell.net (Jen Vasiliev) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Mikhail Eriksson *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From tvasiliev@illinois.edu Sat Mar 25 14:16:26 1995 Path: ashpoly!cascade!transat!ukc!fennimore!illinois!tvasiliev From: tvasiliev@illinois.edu (Tobias Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar25.141626.1571@illinois.edu> Date: Sat, 25 Mar 1995 14:16:26 GMT References: <1995Mar23.225226.1561@pacbell.net> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Mar23.225226.1561@pacbell.net>, jvasiliev@pacbell.net (Jen Vasiliev) 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. -- Tobias Vasiliev "Do not worship the copy." Amiga 1200 (Blizzard 030/50) / FreeBSD 2.1 From asantos@cmu.edu Mon Mar 27 05:03:26 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!asantos From: asantos@cmu.edu (Anton Santos) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar27.050326.8153@cmu.edu> Date: Mon, 27 Mar 1995 05:03:26 GMT References: <1995Mar23.225226.1561@pacbell.net> <1995Mar25.141626.1571@illinois.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Mar25.141626.1571@illinois.edu>, tvasiliev@illinois.edu (Tobias Vasiliev) 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. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Anton Santos "When every node is whole, the channel opens." Commodore Amiga 500 (1MB OCS) / SunOS 4.1.4 From rtakahashi@illinois.edu Mon Mar 27 15:39:26 1995 Path: ashpoly!cascade!transat!ukc!fennimore!illinois!rtakahashi From: rtakahashi@illinois.edu (Raj Takahashi) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Mar27.153926.3947@illinois.edu> Date: Mon, 27 Mar 1995 15:39:26 GMT References: <1995Mar23.225226.1561@pacbell.net> <1995Mar25.141626.1571@illinois.edu> <1995Mar27.050326.8153@cmu.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Mar27.050326.8153@cmu.edu>, asantos@cmu.edu (Anton Santos) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Raj Takahashi | rtakahashi@illinois.edu PGP Key fingerprint: DA46 78D0 0E51 A715 "Keep the channels open."