From lsantos@stanford.edu Mon Nov 04 20:34:21 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!lsantos From: lsantos@stanford.edu (Liam Santos) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov04.203421.4636@stanford.edu> Date: Mon, 04 Nov 1996 20:34:21 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Liam Santos "Hold for relay." Sun 3/60 (SunOS 4.1.1) / System 7.5.1 From gkang@hanse.de Tue Nov 05 16:46:21 1996 Path: ashpoly!cascade!brgate!saturno!hanse!gkang From: gkang@hanse.de (Graham Kang) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov05.164621.8285@hanse.de> Date: Tue, 05 Nov 1996 16:46:21 GMT References: <1996Nov04.203421.4636@stanford.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Nov04.203421.4636@stanford.edu>, lsantos@stanford.edu (Liam Santos) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > 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! If you are posting from AOL, please read RFC 1036 before posting again. -- Graham Kang -- Hanse-Netzwerk Hamburg "The carrier frequency does not drift by accident." From ebrennan@purdue.edu Thu Nov 07 04:21:21 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!ebrennan From: ebrennan@purdue.edu (Emi Brennan) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov07.042121.3288@purdue.edu> Date: Thu, 07 Nov 1996 04:21:21 GMT References: <1996Nov04.203421.4636@stanford.edu> <1996Nov05.164621.8285@hanse.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Nov05.164621.8285@hanse.de>, gkang@hanse.de (Graham Kang) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! > If you are posting from AOL, please read RFC 1036 before posting again. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Emi Brennan Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------ From gduarte@cmu.edu Fri Nov 08 22:52:21 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!gduarte From: gduarte@cmu.edu (Göran Duarte) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov08.225221.6278@cmu.edu> Date: Fri, 08 Nov 1996 22:52:21 GMT References: <1996Nov04.203421.4636@stanford.edu> <1996Nov05.164621.8285@hanse.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996Nov05.164621.8285@hanse.de>, gkang@hanse.de (Graham Kang) 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! -- Göran Duarte Tape trading list upon request. SASE required for international mail. From bivanov@rwth-aachen.de Sat Nov 09 07:31:21 1996 Path: ashpoly!cascade!bigsur!rwth-aachen!bivanov From: bivanov@rwth-aachen.de (Brian Ivanov) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Nov09.073121.1556@rwth-aachen.de> Date: Sat, 09 Nov 1996 07:31:21 GMT References: <1996Nov04.203421.4636@stanford.edu> <1996Nov05.164621.8285@hanse.de> <1996Nov07.042121.3288@purdue.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Nov07.042121.3288@purdue.edu>, ebrennan@purdue.edu (Emi Brennan) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Brian Ivanov *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0