From jrodriguez@demon.co.uk Thu Oct 24 19:23:37 1996 Path: ashpoly!cascade!transat!ukc!fennimore!demon!jrodriguez From: jrodriguez@demon.co.uk (Ji-woo Rodríguez) Newsgroups: comp.sys.m68k Subject: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct24.192337.4401@demon.co.uk> Date: Thu, 24 Oct 1996 19:23:37 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. 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. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Ji-woo Rodríguez US Robotics Courier V.34 @ 14,400 bps "We don't sign stars. We build them." From rbrennan@illinois.edu Fri Oct 25 21:51:37 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!rbrennan From: rbrennan@illinois.edu (Renata Brennan) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct25.215137.6499@illinois.edu> Date: Fri, 25 Oct 1996 21:51:37 GMT References: <1996Oct24.192337.4401@demon.co.uk> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Oct24.192337.4401@demon.co.uk>, jrodriguez@demon.co.uk (Ji-woo Rodríguez) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Renata Brennan "There are 14 nodes and only 10 countries. Count again." Mac IIci / 68882 FPU / System 7.5.1 From jsantos@earthlink.net Sun Oct 27 03:01:37 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!jsantos From: jsantos@earthlink.net (Ji-woo Santos) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct27.030137.2873@earthlink.net> Date: Sun, 27 Oct 1996 03:01:37 GMT References: <1996Oct24.192337.4401@demon.co.uk> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Oct24.192337.4401@demon.co.uk>, jrodriguez@demon.co.uk (Ji-woo Rodríguez) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Ji-woo Santos | jsantos@earthlink.net PGP Key fingerprint: ADDE D0A0 0117 30BD "Keep the channels open." From fvasiliev@inria.fr Sun Oct 27 12:22:37 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!fvasiliev From: fvasiliev@inria.fr (Freya Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct27.122237.8580@inria.fr> Date: Sun, 27 Oct 1996 12:22:37 GMT References: <1996Oct24.192337.4401@demon.co.uk> <1996Oct25.215137.6499@illinois.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Oct25.215137.6499@illinois.edu>, rbrennan@illinois.edu (Renata Brennan) 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. > Unsubscribe me from this list! (Wait, this is Usenet, never mind). Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Freya Vasiliev Zyxel U-1496E @ 28,800 bps "Hardware is temporary. The signal survives." From lramirez@uu.net Mon Oct 28 13:12:37 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!lramirez From: lramirez@uu.net (Lars Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct28.131237.4439@uu.net> Date: Mon, 28 Oct 1996 13:12:37 GMT References: <1996Oct24.192337.4401@demon.co.uk> <1996Oct25.215137.6499@illinois.edu> <1996Oct27.122237.8580@inria.fr> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996Oct27.122237.8580@inria.fr>, fvasiliev@inria.fr (Freya Vasiliev) 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! -- Lars Ramírez Tape trading list upon request. SASE required for international mail.