From kkuznetsov@pacbell.net Sun Jan 15 23:54:47 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!kkuznetsov From: kkuznetsov@pacbell.net (Kenji Kuznetsov) Newsgroups: comp.sys.m68k Subject: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan15.235447.5979@pacbell.net> Date: Sun, 15 Jan 1995 23:54:47 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.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. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Kenji Kuznetsov US Robotics Courier V.34 @ ISDN 64k bps "The carrier frequency does not drift by accident." From blee@stanford.edu Mon Jan 16 17:30:47 1995 Path: ashpoly!cascade!transat!ukc!fennimore!stanford!blee From: blee@stanford.edu (Brian Lee) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan16.173047.1247@stanford.edu> Date: Mon, 16 Jan 1995 17:30:47 GMT References: <1995Jan15.235447.5979@pacbell.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jan15.235447.5979@pacbell.net>, kkuznetsov@pacbell.net (Kenji Kuznetsov) 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). -- Brian Lee "The carrier frequency does not drift by accident." Commodore Amiga 500 (1MB OCS) / SunOS 4.1.4 From dkim@delphi.com Tue Jan 17 16:17:47 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!dkim From: dkim@delphi.com (Dong-hyun Kim) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1995Jan17.161747.9741@delphi.com> Date: Tue, 17 Jan 1995 16:17:47 GMT References: <1995Jan15.235447.5979@pacbell.net> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jan15.235447.5979@pacbell.net>, kkuznetsov@pacbell.net (Kenji Kuznetsov) writes: > 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. Brilliant use of Paula DMA! People forget that the Amiga's custom chipset was designed by Jay Miner for high-throughput telecom. -- Dong-hyun Kim *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0