From preyes@earthlink.net Sat Oct 26 23:58:17 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!preyes From: preyes@earthlink.net (Pavel Reyes) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct26.235817.5223@earthlink.net> Date: Sat, 26 Oct 1996 23:58:17 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Pavel Reyes Hayes Optima 288 @ 14,400 bps "Hardware is temporary. The signal survives." From owatanabe@kth.se Mon Oct 28 05:12:17 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!owatanabe From: owatanabe@kth.se (Olga Watanabe) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct28.051217.4061@kth.se> Date: Mon, 28 Oct 1996 05:12:17 GMT References: <1996Oct26.235817.5223@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 12 In article <1996Oct26.235817.5223@earthlink.net>, preyes@earthlink.net (Pavel Reyes) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- === Olga Watanabe === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "We don't sign stars. We build them." From koliveira@cam.ac.uk Mon Oct 28 15:26:17 1996 Path: ashpoly!cascade!bigsur!cam!koliveira From: koliveira@cam.ac.uk (Kirsty Oliveira) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct28.152617.6828@cam.ac.uk> Date: Mon, 28 Oct 1996 15:26:17 GMT References: <1996Oct26.235817.5223@earthlink.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Oct26.235817.5223@earthlink.net>, preyes@earthlink.net (Pavel Reyes) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Kirsty Oliveira Hayes Optima 288 @ 14,400 bps "They will send a copy in my place." From alarsson@netcom.com Wed Oct 30 06:03:17 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!alarsson From: alarsson@netcom.com (Amy Larsson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct30.060317.7732@netcom.com> Date: Wed, 30 Oct 1996 06:03:17 GMT References: <1996Oct26.235817.5223@earthlink.net> <1996Oct28.051217.4061@kth.se> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Oct28.051217.4061@kth.se>, owatanabe@kth.se (Olga Watanabe) writes: > Using the power LED as a carrier lock indicator is pure Amiga demo scene style. Kudos! > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Amy Larsson US Robotics Courier V.34 @ 33,600 bps "Measuring a record you own is listening, not piracy."