From ymacdonald@berkeley.edu Sun May 15 00:49:53 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!ymacdonald From: ymacdonald@berkeley.edu (Yuki MacDonald) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May15.004953.6044@berkeley.edu> Date: Sun, 15 May 1994 00:49:53 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N 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! Does anyone want to test on an unaccelerated Amiga 500 with 512K chip RAM? -- Yuki MacDonald Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------ From orobertson@uni-hamburg.de Tue May 17 01:20:53 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!orobertson From: orobertson@uni-hamburg.de (Olga Robertson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May17.012053.9191@uni-hamburg.de> Date: Tue, 17 May 1994 01:20:53 GMT References: <1994May15.004953.6044@berkeley.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1994May15.004953.6044@berkeley.edu>, ymacdonald@berkeley.edu (Yuki MacDonald) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Olga Robertson -- Universität Hamburg Fachbereich Informatik "The hatch is open. Is anyone listening?" From ksokolov@hanse.de Wed May 18 21:38:53 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!ksokolov From: ksokolov@hanse.de (Karen Sokolov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May18.213853.2641@hanse.de> Date: Wed, 18 May 1994 21:38:53 GMT References: <1994May15.004953.6044@berkeley.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 12 In article <1994May15.004953.6044@berkeley.edu>, ymacdonald@berkeley.edu (Yuki MacDonald) 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. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Karen Sokolov *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From lsanchez@mindspring.com Fri May 20 20:06:53 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!lsanchez From: lsanchez@mindspring.com (Lucia Sánchez) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994May20.200653.6386@mindspring.com> Date: Fri, 20 May 1994 20:06:53 GMT References: <1994May15.004953.6044@berkeley.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1994May15.004953.6044@berkeley.edu>, ymacdonald@berkeley.edu (Yuki MacDonald) 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. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Lucia Sánchez "When every node is whole, the channel opens." Commodore Amiga 500 (1MB OCS) / AmigaOS 3.1