From knilsson@clari.net Mon Sep 04 01:55:04 1995 Path: ashpoly!cascade!mxgate!coyoacan!clari!knilsson From: knilsson@clari.net (Katrin Nilsson) Newsgroups: comp.sys.m68k Subject: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep04.015504.3787@clari.net> Date: Mon, 04 Sep 1995 01:55:04 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. 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! -- === Katrin Nilsson === Dept of Electrical Engineering, ClariNet Communications Corp "Row 14. No joke." From rito@mindspring.com Tue Sep 05 05:20:04 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!rito From: rito@mindspring.com (Renata Ito) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep05.052004.1286@mindspring.com> Date: Tue, 05 Sep 1995 05:20:04 GMT References: <1995Sep04.015504.3787@clari.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep04.015504.3787@clari.net>, knilsson@clari.net (Katrin Nilsson) 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. -- Renata Ito "Do not worship the copy." Atari TT030 / System 7.5.1 From esanchez@utexas.edu Wed Sep 06 19:11:04 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!esanchez From: esanchez@utexas.edu (Élodie Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Sep06.191104.4540@utexas.edu> Date: Wed, 06 Sep 1995 19:11:04 GMT References: <1995Sep04.015504.3787@clari.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Sep04.015504.3787@clari.net>, knilsson@clari.net (Katrin Nilsson) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Élodie Sánchez Tape trading list upon request. SASE required for international mail.