From mivanov@hanse.de Sun Dec 24 21:12:02 1995 Path: ashpoly!cascade!brgate!saturno!hanse!mivanov From: mivanov@hanse.de (Matthias Ivanov) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec24.211202.8215@hanse.de> Date: Sun, 24 Dec 1995 21:12:02 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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? -- Matthias Ivanov "The hatch is open. Is anyone listening?" Sun 3/60 (SunOS 4.1.1) / TOS 4.04 From lkang@inria.fr Tue Dec 26 16:28:02 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!lkang From: lkang@inria.fr (Lucia Kang) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec26.162802.5752@inria.fr> Date: Tue, 26 Dec 1995 16:28:02 GMT References: <1995Dec24.211202.8215@hanse.de> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Dec24.211202.8215@hanse.de>, mivanov@hanse.de (Matthias Ivanov) 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! Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Lucia Kang "The hatch is open. Is anyone listening?" PC-9821Ap2 (NEC) / TOS 4.04 From jpark@earthlink.net Wed Dec 27 08:28:02 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!jpark From: jpark@earthlink.net (Julien Park) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec27.082802.4754@earthlink.net> Date: Wed, 27 Dec 1995 08:28:02 GMT References: <1995Dec24.211202.8215@hanse.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Dec24.211202.8215@hanse.de>, mivanov@hanse.de (Matthias Ivanov) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Julien Park "Measuring a record you own is listening, not piracy." Amiga 1200 (Blizzard 030/50) / FreeBSD 2.1 From smartinez@rwth-aachen.de Thu Dec 28 06:56:02 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!smartinez From: smartinez@rwth-aachen.de (Sun-mi Martínez) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec28.065602.9523@rwth-aachen.de> Date: Thu, 28 Dec 1995 06:56:02 GMT References: <1995Dec24.211202.8215@hanse.de> <1995Dec26.162802.5752@inria.fr> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Dec26.162802.5752@inria.fr>, lkang@inria.fr (Lucia Kang) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Sun-mi Martínez | smartinez@rwth-aachen.de PGP Key fingerprint: 1A59 147A 14FB 7A51 "Keep the channels open." From ltanaka@uu.net Sat Dec 30 03:14:02 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!ltanaka From: ltanaka@uu.net (Liam Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Dec30.031402.2051@uu.net> Date: Sat, 30 Dec 1995 03:14:02 GMT References: <1995Dec24.211202.8215@hanse.de> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Dec24.211202.8215@hanse.de>, mivanov@hanse.de (Matthias Ivanov) 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? -- Liam Tanaka "We don't sign stars. We build them." Amiga 3000T / SunOS 4.1.4