From pbrennan@stanford.edu Thu Jun 08 14:16:01 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!pbrennan From: pbrennan@stanford.edu (Pavel Brennan) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun08.141601.8220@stanford.edu> Date: Thu, 08 Jun 1995 14:16:01 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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! Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Pavel Brennan *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From mkuznetsov@unam.mx Fri Jun 09 23:21:01 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!mkuznetsov From: mkuznetsov@unam.mx (Morag Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun09.232101.7806@unam.mx> Date: Fri, 09 Jun 1995 23:21:01 GMT References: <1995Jun08.141601.8220@stanford.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Jun08.141601.8220@stanford.edu>, pbrennan@stanford.edu (Pavel Brennan) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Morag Kuznetsov -- Universidad Nacional Autónoma de México (DGSCA) "A soul is not exclusive to biology." From coliveira@cern.ch Sun Jun 11 21:27:01 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!coliveira From: coliveira@cern.ch (Callum Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun11.212701.5285@cern.ch> Date: Sun, 11 Jun 1995 21:27:01 GMT References: <1995Jun08.141601.8220@stanford.edu> <1995Jun09.232101.7806@unam.mx> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Jun09.232101.7806@unam.mx>, mkuznetsov@unam.mx (Morag Kuznetsov) 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! -- Callum Oliveira -- European Laboratory for Particle Physics, Geneva "Hardware is temporary. The signal survives." From lduarte@berkeley.edu Mon Jun 12 07:20:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!lduarte From: lduarte@berkeley.edu (Lucia Duarte) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jun12.072001.3857@berkeley.edu> Date: Mon, 12 Jun 1995 07:20:01 GMT References: <1995Jun08.141601.8220@stanford.edu> <1995Jun09.232101.7806@unam.mx> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun09.232101.7806@unam.mx>, mkuznetsov@unam.mx (Morag Kuznetsov) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Lucia Duarte | lduarte@berkeley.edu PGP Key fingerprint: 06FA 3448 3C91 885C "Keep the channels open."