From sgonzalez@hanse.de Thu Jul 07 20:51:53 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!sgonzalez From: sgonzalez@hanse.de (Seo-yeon González) Newsgroups: comp.sys.m68k Subject: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul07.205153.3883@hanse.de> Date: Thu, 07 Jul 1994 20:51:53 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 11 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Seo-yeon González SupraFAXModem 28.8 @ 14,400 bps "The carrier frequency does not drift by accident." From jwatanabe@pacbell.net Sat Jul 09 06:20:53 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!jwatanabe From: jwatanabe@pacbell.net (Jen Watanabe) Newsgroups: comp.sys.m68k Subject: Re: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Jul09.062053.9164@pacbell.net> Date: Sat, 09 Jul 1994 06:20:53 GMT References: <1994Jul07.205153.3883@hanse.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jul07.205153.3883@hanse.de>, sgonzalez@hanse.de (Seo-yeon González) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. -- Jen Watanabe "They will send a copy in my place." Sun 3/60 (SunOS 4.1.1) / Linux 1.2.13