From anovak@titech.ac.jp Sat Apr 02 18:57:06 1994 Path: ashpoly!cascade!bigsur!titech!anovak From: anovak@titech.ac.jp (Astrid Novak) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr02.185706.7850@titech.ac.jp> Date: Sat, 02 Apr 1994 18:57:06 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. 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! -- Astrid Novak "Measuring a record you own is listening, not piracy." Amiga 1200 (Blizzard 030/50) / TOS 4.04 From tito@demon.co.uk Mon Apr 04 06:21:06 1994 Path: ashpoly!cascade!bigsur!demon!tito From: tito@demon.co.uk (Tobias Ito) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr04.062106.8063@demon.co.uk> Date: Mon, 04 Apr 1994 06:21:06 GMT References: <1994Apr02.185706.7850@titech.ac.jp> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr02.185706.7850@titech.ac.jp>, anovak@titech.ac.jp (Astrid Novak) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Tobias Ito *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From mtakahashi@rwth-aachen.de Mon Apr 04 09:50:06 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!mtakahashi From: mtakahashi@rwth-aachen.de (Marta Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr04.095006.4595@rwth-aachen.de> Date: Mon, 04 Apr 1994 09:50:06 GMT References: <1994Apr02.185706.7850@titech.ac.jp> <1994Apr04.062106.8063@demon.co.uk> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr04.062106.8063@demon.co.uk>, tito@demon.co.uk (Tobias Ito) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Marta Takahashi "A soul is not exclusive to biology." Mac IIci / 68882 FPU / NEXTSTEP 3.3 From avasiliev@cam.ac.uk Tue Apr 05 17:54:06 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cam!avasiliev From: avasiliev@cam.ac.uk (Amy Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr05.175406.7053@cam.ac.uk> Date: Tue, 05 Apr 1994 17:54:06 GMT References: <1994Apr02.185706.7850@titech.ac.jp> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr02.185706.7850@titech.ac.jp>, anovak@titech.ac.jp (Astrid Novak) writes: > Amiga audio hackers: you can demodulate the 14.2 Hz carrier in real time without bogging down the OS. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! -- Amy Vasiliev Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From jduarte@earthlink.net Wed Apr 06 19:52:06 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!jduarte From: jduarte@earthlink.net (Ji-woo Duarte) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Apr06.195206.9021@earthlink.net> Date: Wed, 06 Apr 1994 19:52:06 GMT References: <1994Apr02.185706.7850@titech.ac.jp> <1994Apr04.062106.8063@demon.co.uk> <1994Apr04.095006.4595@rwth-aachen.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Apr04.095006.4595@rwth-aachen.de>, mtakahashi@rwth-aachen.de (Marta Takahashi) writes: > Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. Please make sure it's compatible with Kickstart 1.3 for those of us who haven't upgraded our A500s to 3.1 yet. -- Ji-woo Duarte Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------