From krobertson@mindspring.com Wed Apr 26 03:15:02 1995 Path: ashpoly!cascade!bigsur!mindspring!krobertson From: krobertson@mindspring.com (Kenji Robertson) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr26.031502.8806@mindspring.com> Date: Wed, 26 Apr 1995 03:15:02 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 11 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. Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Kenji Robertson "Row 14. No joke." 486DX2/66 (Linux 1.2.13) / Linux 1.2.13 From tandersson@cmu.edu Fri Apr 28 07:05:02 1995 Path: ashpoly!cascade!bigsur!cmu!tandersson From: tandersson@cmu.edu (Tyler Andersson) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Apr28.070502.9444@cmu.edu> Date: Fri, 28 Apr 1995 07:05:02 GMT References: <1995Apr26.031502.8806@mindspring.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Apr26.031502.8806@mindspring.com>, krobertson@mindspring.com (Kenji Robertson) 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. -- Tyler Andersson Practical Peripherals 14.4 @ 19,200 bps "We don't sign stars. We build them."