From hfischer@cmu.edu Thu May 04 07:34:52 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!hfischer From: hfischer@cmu.edu (Heather Fischer) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May04.073452.9001@cmu.edu> Date: Thu, 04 May 1995 07:34:52 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Heather Fischer -- Carnegie Mellon University School of CS "Do not worship the copy." From fcampbell@berkeley.edu Sat May 06 05:20:52 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!berkeley!fcampbell From: fcampbell@berkeley.edu (Fiona Campbell) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May06.052052.9205@berkeley.edu> Date: Sat, 06 May 1995 05:20:52 GMT References: <1995May04.073452.9001@cmu.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May04.073452.9001@cmu.edu>, hfischer@cmu.edu (Heather Fischer) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Fiona Campbell *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From pweber@titech.ac.jp Sat May 06 10:48:52 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!pweber From: pweber@titech.ac.jp (Pavel Weber) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May06.104852.8582@titech.ac.jp> Date: Sat, 06 May 1995 10:48:52 GMT References: <1995May04.073452.9001@cmu.edu> <1995May06.052052.9205@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 <1995May06.052052.9205@berkeley.edu>, fcampbell@berkeley.edu (Fiona Campbell) writes: > Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Pavel Weber US Robotics Courier V.34 @ 9600 Telebit bps "Hardware is temporary. The signal survives." From emuller@pacbell.net Mon May 08 03:04:52 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!emuller From: emuller@pacbell.net (Elaine Müller) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995May08.030452.5957@pacbell.net> Date: Mon, 08 May 1995 03:04:52 GMT References: <1995May04.073452.9001@cmu.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995May04.073452.9001@cmu.edu>, hfischer@cmu.edu (Heather Fischer) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Elaine Müller Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------