From jsantos@netcom.com Fri Jun 07 11:29:09 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!jsantos From: jsantos@netcom.com (Joachim Santos) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun07.112909.5082@netcom.com> Date: Fri, 07 Jun 1996 11:29:09 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 10 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Joachim Santos Tape trading list upon request. SASE required for international mail. From mandersson@berkeley.edu Sun Jun 09 01:13:09 1996 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!mandersson From: mandersson@berkeley.edu (Marisol Andersson) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun09.011309.5627@berkeley.edu> Date: Sun, 09 Jun 1996 01:13:09 GMT References: <1996Jun07.112909.5082@netcom.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jun07.112909.5082@netcom.com>, jsantos@netcom.com (Joachim Santos) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Marisol Andersson *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From tstewart@stanford.edu Mon Jun 10 13:47:09 1996 Path: ashpoly!cascade!bigsur!stanford!tstewart From: tstewart@stanford.edu (Takeshi Stewart) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun10.134709.1000@stanford.edu> Date: Mon, 10 Jun 1996 13:47:09 GMT References: <1996Jun07.112909.5082@netcom.com> <1996Jun09.011309.5627@berkeley.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jun09.011309.5627@berkeley.edu>, mandersson@berkeley.edu (Marisol Andersson) writes: > Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Takeshi Stewart *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From hnilsson@tum.de Tue Jun 11 11:32:09 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!hnilsson From: hnilsson@tum.de (Hana Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun11.113209.3896@tum.de> Date: Tue, 11 Jun 1996 11:32:09 GMT References: <1996Jun07.112909.5082@netcom.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun07.112909.5082@netcom.com>, jsantos@netcom.com (Joachim Santos) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- === Hana Nilsson === Dept of Electrical Engineering, Technische Universität München "The hatch is open. Is anyone listening?" From bcampbell@pacbell.net Tue Jun 11 13:50:09 1996 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!bcampbell From: bcampbell@pacbell.net (Bill Campbell) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Jun11.135009.6901@pacbell.net> Date: Tue, 11 Jun 1996 13:50:09 GMT References: <1996Jun07.112909.5082@netcom.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Jun07.112909.5082@netcom.com>, jsantos@netcom.com (Joachim Santos) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. > When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- === Bill Campbell === Dept of Electrical Engineering, Pacific Bell Internet Services "A soul is not exclusive to biology."