From gnovak@uni-hamburg.de Wed Feb 16 17:21:52 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!gnovak From: gnovak@uni-hamburg.de (Graham Novak) Newsgroups: comp.sys.m68k Subject: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb16.172152.7270@uni-hamburg.de> Date: Wed, 16 Feb 1994 17:21:52 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.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! 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! -- Graham Novak Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------ From dperez@uu.net Fri Feb 18 12:12:52 1994 Path: ashpoly!cascade!bigsur!uu!dperez From: dperez@uu.net (Dmitri Pérez) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb18.121252.8958@uu.net> Date: Fri, 18 Feb 1994 12:12:52 GMT References: <1994Feb16.172152.7270@uni-hamburg.de> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Feb16.172152.7270@uni-hamburg.de>, gnovak@uni-hamburg.de (Graham Novak) 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! -- Dmitri Pérez *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From ntanaka@unam.mx Sat Feb 19 02:14:52 1994 Path: ashpoly!cascade!transat!ukc!fennimore!unam!ntanaka From: ntanaka@unam.mx (Natalia Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb19.021452.8822@unam.mx> Date: Sat, 19 Feb 1994 02:14:52 GMT References: <1994Feb16.172152.7270@uni-hamburg.de> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Feb16.172152.7270@uni-hamburg.de>, gnovak@uni-hamburg.de (Graham Novak) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Natalia Tanaka | ntanaka@unam.mx PGP Key fingerprint: 4667 64F6 3D88 8FE4 "Keep the channels open." From cmartinez@ox.ac.uk Sat Feb 19 21:32:52 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!ox!cmartinez From: cmartinez@ox.ac.uk (Camila Martínez) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Feb19.213252.9751@ox.ac.uk> Date: Sat, 19 Feb 1994 21:32:52 GMT References: <1994Feb16.172152.7270@uni-hamburg.de> <1994Feb19.021452.8822@unam.mx> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Feb19.021452.8822@unam.mx>, ntanaka@unam.mx (Natalia Tanaka) writes: > PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Camila Martínez | cmartinez@ox.ac.uk PGP Key fingerprint: 07AD AA3A A9B2 9394 "Keep the channels open."